[FL-3179] 1-Wire Overdrive Mode (#2522)
* Separate ibutton to its own module, add one_wire to f18 * Move onewire cli to a separate app * Add definitions for normal and overdrive timings * Update api definitions * Add rough overdrive timings definition for onewire emulation * Remove one_wire_host_timing.h * Add rough overdrive timings for onewire host * Improve overdrive mode * Working overdrive mode from flipper to flipper * Update thermometer example app * Turn on otg power when running thermometer example app * Implement reset overdrive switching * Always exit out of overdrive mode * Improve overdrive timings * Fix typos * Fix reset behaviour * Use overdrive mode everywhere in DS1996 * Improve comments * Bump API version Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Georgii Surkov
GitHub
parent
1f236ede0e
commit
8b224ecb15
@ -19,9 +19,12 @@
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#include <one_wire/maxim_crc.h>
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#include <one_wire/one_wire_host.h>
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#include <furi_hal_power.h>
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#define UPDATE_PERIOD_MS 1000UL
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#define TEXT_STORE_SIZE 64U
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#define DS18B20_CMD_SKIP_ROM 0xccU
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#define DS18B20_CMD_CONVERT 0x44U
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#define DS18B20_CMD_READ_SCRATCHPAD 0xbeU
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@ -92,7 +95,7 @@ static void example_thermo_request_temperature(ExampleThermoContext* context) {
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/* After the reset, a ROM operation must follow.
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If there is only one device connected, the "Skip ROM" command is most appropriate
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(it can also be used to address all of the connected devices in some cases).*/
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onewire_host_skip(onewire);
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onewire_host_write(onewire, DS18B20_CMD_SKIP_ROM);
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/* After the ROM operation, a device-specific command is issued.
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In this case, it's a request to start measuring the temperature. */
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onewire_host_write(onewire, DS18B20_CMD_CONVERT);
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@ -133,7 +136,7 @@ static void example_thermo_read_temperature(ExampleThermoContext* context) {
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/* After the reset, a ROM operation must follow.
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If there is only one device connected, the "Skip ROM" command is most appropriate
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(it can also be used to address all of the connected devices in some cases).*/
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onewire_host_skip(onewire);
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onewire_host_write(onewire, DS18B20_CMD_SKIP_ROM);
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/* After the ROM operation, a device-specific command is issued.
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This time, it will be the "Read Scratchpad" command which will
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@ -267,6 +270,9 @@ static void example_thermo_input_callback(InputEvent* event, void* ctx) {
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/* Starts the reader thread and handles the input */
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static void example_thermo_run(ExampleThermoContext* context) {
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/* Enable power on external pins */
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furi_hal_power_enable_otg();
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/* Configure the hardware in host mode */
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onewire_host_start(context->onewire);
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@ -299,6 +305,9 @@ static void example_thermo_run(ExampleThermoContext* context) {
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/* Reset the hardware */
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onewire_host_stop(context->onewire);
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/* Disable power on external pins */
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furi_hal_power_disable_otg();
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}
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/******************** Initialisation & startup *****************************/
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@ -1,5 +1,5 @@
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entry,status,name,type,params
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Version,+,19.0,,
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Version,+,20.0,,
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Header,+,applications/services/bt/bt_service/bt.h,,
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Header,+,applications/services/cli/cli.h,,
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Header,+,applications/services/cli/cli_vcp.h,,
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@ -153,7 +153,6 @@ Header,+,lib/mlib/m-tuple.h,,
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Header,+,lib/mlib/m-variant.h,,
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Header,+,lib/one_wire/maxim_crc.h,,
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Header,+,lib/one_wire/one_wire_host.h,,
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Header,+,lib/one_wire/one_wire_host_timing.h,,
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Header,+,lib/one_wire/one_wire_slave.h,,
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Header,+,lib/print/wrappers.h,,
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Header,+,lib/toolbox/args.h,,
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@ -1481,8 +1480,8 @@ Function,+,onewire_host_read_bit,_Bool,OneWireHost*
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Function,+,onewire_host_read_bytes,void,"OneWireHost*, uint8_t*, uint16_t"
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Function,+,onewire_host_reset,_Bool,OneWireHost*
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Function,+,onewire_host_reset_search,void,OneWireHost*
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Function,+,onewire_host_search,uint8_t,"OneWireHost*, uint8_t*, OneWireHostSearchMode"
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Function,+,onewire_host_skip,void,OneWireHost*
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Function,+,onewire_host_search,_Bool,"OneWireHost*, uint8_t*, OneWireHostSearchMode"
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Function,+,onewire_host_set_overdrive,void,"OneWireHost*, _Bool"
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Function,+,onewire_host_start,void,OneWireHost*
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Function,+,onewire_host_stop,void,OneWireHost*
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Function,+,onewire_host_target_search,void,"OneWireHost*, uint8_t"
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@ -1496,6 +1495,7 @@ Function,+,onewire_slave_receive_bit,_Bool,OneWireSlave*
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Function,+,onewire_slave_send,_Bool,"OneWireSlave*, const uint8_t*, size_t"
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Function,+,onewire_slave_send_bit,_Bool,"OneWireSlave*, _Bool"
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Function,+,onewire_slave_set_command_callback,void,"OneWireSlave*, OneWireSlaveCommandCallback, void*"
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Function,+,onewire_slave_set_overdrive,void,"OneWireSlave*, _Bool"
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Function,+,onewire_slave_set_reset_callback,void,"OneWireSlave*, OneWireSlaveResetCallback, void*"
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Function,+,onewire_slave_set_result_callback,void,"OneWireSlave*, OneWireSlaveResultCallback, void*"
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Function,+,onewire_slave_start,void,OneWireSlave*
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@ -1,5 +1,5 @@
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entry,status,name,type,params
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Version,+,19.0,,
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Version,+,20.0,,
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Header,+,applications/services/bt/bt_service/bt.h,,
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Header,+,applications/services/cli/cli.h,,
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Header,+,applications/services/cli/cli_vcp.h,,
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@ -172,7 +172,6 @@ Header,+,lib/mlib/m-variant.h,,
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Header,+,lib/nfc/nfc_device.h,,
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Header,+,lib/one_wire/maxim_crc.h,,
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Header,+,lib/one_wire/one_wire_host.h,,
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Header,+,lib/one_wire/one_wire_host_timing.h,,
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Header,+,lib/one_wire/one_wire_slave.h,,
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Header,+,lib/print/wrappers.h,,
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Header,+,lib/subghz/blocks/const.h,,
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@ -2062,8 +2061,8 @@ Function,+,onewire_host_read_bit,_Bool,OneWireHost*
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Function,+,onewire_host_read_bytes,void,"OneWireHost*, uint8_t*, uint16_t"
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Function,+,onewire_host_reset,_Bool,OneWireHost*
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Function,+,onewire_host_reset_search,void,OneWireHost*
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Function,+,onewire_host_search,uint8_t,"OneWireHost*, uint8_t*, OneWireHostSearchMode"
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Function,+,onewire_host_skip,void,OneWireHost*
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Function,+,onewire_host_search,_Bool,"OneWireHost*, uint8_t*, OneWireHostSearchMode"
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Function,+,onewire_host_set_overdrive,void,"OneWireHost*, _Bool"
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Function,+,onewire_host_start,void,OneWireHost*
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Function,+,onewire_host_stop,void,OneWireHost*
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Function,+,onewire_host_target_search,void,"OneWireHost*, uint8_t"
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@ -2077,6 +2076,7 @@ Function,+,onewire_slave_receive_bit,_Bool,OneWireSlave*
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Function,+,onewire_slave_send,_Bool,"OneWireSlave*, const uint8_t*, size_t"
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Function,+,onewire_slave_send_bit,_Bool,"OneWireSlave*, _Bool"
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Function,+,onewire_slave_set_command_callback,void,"OneWireSlave*, OneWireSlaveCommandCallback, void*"
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Function,+,onewire_slave_set_overdrive,void,"OneWireSlave*, _Bool"
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Function,+,onewire_slave_set_reset_callback,void,"OneWireSlave*, OneWireSlaveResetCallback, void*"
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Function,+,onewire_slave_set_result_callback,void,"OneWireSlave*, OneWireSlaveResultCallback, void*"
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Function,+,onewire_slave_start,void,OneWireSlave*
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@ -1,10 +1,10 @@
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#pragma once
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#include <flipper_format.h>
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#include <one_wire/one_wire_host.h>
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#include <one_wire/one_wire_slave.h>
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#include <flipper_format/flipper_format.h>
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#define DALLAS_COMMON_MANUFACTURER_NAME "Dallas"
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#define DALLAS_COMMON_CMD_READ_ROM 0x33U
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@ -2,11 +2,11 @@
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#include "../protocol_common_i.h"
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#include <flipper_format.h>
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#include <one_wire/one_wire_host.h>
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#include <one_wire/one_wire_slave.h>
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#include <flipper_format/flipper_format.h>
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typedef bool (*iButtonProtocolDallasReadWriteFunc)(OneWireHost*, iButtonProtocolData*);
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typedef void (*iButtonProtocolDallasEmulateFunc)(OneWireSlave*, iButtonProtocolData*);
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typedef bool (*iButtonProtocolDallasSaveFunc)(FlipperFormat*, const iButtonProtocolData*);
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@ -53,7 +53,7 @@ const iButtonProtocolDallasBase ibutton_protocol_ds1971 = {
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.name = DS1971_FAMILY_NAME,
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.read = dallas_ds1971_read,
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.write_blank = NULL, /* No data to write a blank */
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.write_blank = NULL, // TODO: Implement writing to blank
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.write_copy = dallas_ds1971_write_copy,
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.emulate = dallas_ds1971_emulate,
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.save = dallas_ds1971_save,
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@ -76,7 +76,7 @@ bool dallas_ds1971_write_copy(OneWireHost* host, iButtonProtocolData* protocol_d
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DS1971ProtocolData* data = protocol_data;
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onewire_host_reset(host);
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onewire_host_skip(host);
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onewire_host_write(host, DALLAS_COMMON_CMD_SKIP_ROM);
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// Starting writing from address 0x0000
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onewire_host_write(host, DALLAS_COMMON_CMD_WRITE_SCRATCH);
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onewire_host_write(host, 0x00);
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@ -87,7 +87,7 @@ bool dallas_ds1971_write_copy(OneWireHost* host, iButtonProtocolData* protocol_d
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bool pad_valid = false;
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if(onewire_host_reset(host)) {
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pad_valid = true;
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onewire_host_skip(host);
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onewire_host_write(host, DALLAS_COMMON_CMD_SKIP_ROM);
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onewire_host_write(host, DALLAS_COMMON_CMD_READ_SCRATCH);
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onewire_host_write(host, 0x00);
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@ -103,7 +103,7 @@ bool dallas_ds1971_write_copy(OneWireHost* host, iButtonProtocolData* protocol_d
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// Copy scratchpad to memory and confirm
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if(pad_valid) {
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if(onewire_host_reset(host)) {
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onewire_host_skip(host);
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onewire_host_write(host, DALLAS_COMMON_CMD_SKIP_ROM);
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onewire_host_write(host, DALLAS_COMMON_CMD_COPY_SCRATCH);
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onewire_host_write(host, DS1971_CMD_FINALIZATION);
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@ -114,10 +114,16 @@ bool dallas_ds1971_write_copy(OneWireHost* host, iButtonProtocolData* protocol_d
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return pad_valid;
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}
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static void dallas_ds1971_reset_callback(void* context) {
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static bool dallas_ds1971_reset_callback(bool is_short, void* context) {
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furi_assert(context);
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DS1971ProtocolData* data = context;
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data->state.command_state = DallasCommonCommandStateIdle;
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if(!is_short) {
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data->state.command_state = DallasCommonCommandStateIdle;
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onewire_slave_set_overdrive(data->state.bus, is_short);
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}
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return !is_short;
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}
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static bool dallas_ds1971_command_callback(uint8_t command, void* context) {
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@ -67,6 +67,14 @@ bool dallas_ds1990_write_blank(OneWireHost* host, iButtonProtocolData* protocol_
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tm2004_write(host, data->rom_data.bytes, sizeof(DallasCommonRomData));
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}
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static bool dallas_ds1990_reset_callback(bool is_short, void* context) {
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DS1990ProtocolData* data = context;
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if(!is_short) {
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onewire_slave_set_overdrive(data->state.bus, is_short);
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}
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return !is_short;
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}
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static bool dallas_ds1990_command_callback(uint8_t command, void* context) {
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furi_assert(context);
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DS1990ProtocolData* data = context;
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@ -92,7 +100,7 @@ void dallas_ds1990_emulate(OneWireSlave* bus, iButtonProtocolData* protocol_data
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DS1990ProtocolData* data = protocol_data;
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data->state.bus = bus;
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onewire_slave_set_reset_callback(bus, NULL, NULL);
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onewire_slave_set_reset_callback(bus, dallas_ds1990_reset_callback, protocol_data);
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onewire_slave_set_command_callback(bus, dallas_ds1990_command_callback, protocol_data);
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}
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@ -87,10 +87,16 @@ bool dallas_ds1992_write_copy(OneWireHost* host, iButtonProtocolData* protocol_d
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DS1992_SRAM_DATA_SIZE);
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}
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static void dallas_ds1992_reset_callback(void* context) {
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static bool dallas_ds1992_reset_callback(bool is_short, void* context) {
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furi_assert(context);
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DS1992ProtocolData* data = context;
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data->state.command_state = DallasCommonCommandStateIdle;
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if(!is_short) {
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data->state.command_state = DallasCommonCommandStateIdle;
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onewire_slave_set_overdrive(data->state.bus, is_short);
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}
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return !is_short;
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}
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static bool dallas_ds1992_command_callback(uint8_t command, void* context) {
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@ -63,24 +63,54 @@ const iButtonProtocolDallasBase ibutton_protocol_ds1996 = {
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bool dallas_ds1996_read(OneWireHost* host, iButtonProtocolData* protocol_data) {
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DS1996ProtocolData* data = protocol_data;
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return onewire_host_reset(host) && dallas_common_read_rom(host, &data->rom_data) &&
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dallas_common_read_mem(host, 0, data->sram_data, DS1996_SRAM_DATA_SIZE);
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bool success = false;
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do {
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if(!onewire_host_reset(host)) break;
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if(!dallas_common_read_rom(host, &data->rom_data)) break;
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if(!onewire_host_reset(host)) break;
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onewire_host_write(host, DALLAS_COMMON_CMD_OVERDRIVE_SKIP_ROM);
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onewire_host_set_overdrive(host, true);
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if(!dallas_common_read_mem(host, 0, data->sram_data, DS1996_SRAM_DATA_SIZE)) break;
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success = true;
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} while(false);
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onewire_host_set_overdrive(host, false);
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return success;
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}
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bool dallas_ds1996_write_copy(OneWireHost* host, iButtonProtocolData* protocol_data) {
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DS1996ProtocolData* data = protocol_data;
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return dallas_common_write_mem(
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host,
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DS1996_COPY_SCRATCH_TIMEOUT_US,
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DS1996_SRAM_PAGE_SIZE,
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data->sram_data,
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DS1996_SRAM_DATA_SIZE);
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bool success = false;
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do {
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if(!onewire_host_reset(host)) break;
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onewire_host_write(host, DALLAS_COMMON_CMD_OVERDRIVE_SKIP_ROM);
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onewire_host_set_overdrive(host, true);
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if(!dallas_common_write_mem(
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host,
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DS1996_COPY_SCRATCH_TIMEOUT_US,
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DS1996_SRAM_PAGE_SIZE,
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data->sram_data,
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DS1996_SRAM_DATA_SIZE))
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break;
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success = true;
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} while(false);
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onewire_host_set_overdrive(host, false);
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return success;
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}
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static void dallas_ds1996_reset_callback(void* context) {
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static bool dallas_ds1996_reset_callback(bool is_short, void* context) {
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furi_assert(context);
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DS1996ProtocolData* data = context;
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data->state.command_state = DallasCommonCommandStateIdle;
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onewire_slave_set_overdrive(data->state.bus, is_short);
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return true;
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}
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static bool dallas_ds1996_command_callback(uint8_t command, void* context) {
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@ -96,8 +126,7 @@ static bool dallas_ds1996_command_callback(uint8_t command, void* context) {
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} else if(data->state.command_state == DallasCommonCommandStateRomCmd) {
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data->state.command_state = DallasCommonCommandStateMemCmd;
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dallas_common_emulate_read_mem(bus, data->sram_data, DS1996_SRAM_DATA_SIZE);
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return false;
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return dallas_common_emulate_read_mem(bus, data->sram_data, DS1996_SRAM_DATA_SIZE);
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} else {
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return false;
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@ -120,8 +149,17 @@ static bool dallas_ds1996_command_callback(uint8_t command, void* context) {
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}
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case DALLAS_COMMON_CMD_OVERDRIVE_SKIP_ROM:
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if(data->state.command_state == DallasCommonCommandStateIdle) {
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data->state.command_state = DallasCommonCommandStateRomCmd;
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onewire_slave_set_overdrive(bus, true);
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return true;
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} else {
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return false;
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}
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case DALLAS_COMMON_CMD_MATCH_ROM:
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case DALLAS_COMMON_CMD_OVERDRIVE_MATCH_ROM:
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/* TODO: Overdrive mode support */
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/* TODO: Match ROM command support */
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default:
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return false;
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}
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@ -61,6 +61,14 @@ bool ds_generic_write_blank(OneWireHost* host, iButtonProtocolData* protocol_dat
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return tm2004_write(host, data->rom_data.bytes, sizeof(DallasCommonRomData));
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}
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static bool ds_generic_reset_callback(bool is_short, void* context) {
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DallasGenericProtocolData* data = context;
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if(!is_short) {
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onewire_slave_set_overdrive(data->state.bus, is_short);
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}
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return !is_short;
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}
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static bool ds_generic_command_callback(uint8_t command, void* context) {
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furi_assert(context);
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DallasGenericProtocolData* data = context;
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@ -85,7 +93,7 @@ void ds_generic_emulate(OneWireSlave* bus, iButtonProtocolData* protocol_data) {
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DallasGenericProtocolData* data = protocol_data;
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data->state.bus = bus;
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onewire_slave_set_reset_callback(bus, NULL, NULL);
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onewire_slave_set_reset_callback(bus, ds_generic_reset_callback, NULL);
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onewire_slave_set_command_callback(bus, ds_generic_command_callback, protocol_data);
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}
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@ -8,7 +8,6 @@ env.Append(
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"#/lib/one_wire",
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],
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SDK_HEADERS=[
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File("one_wire_host_timing.h"),
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File("one_wire_host.h"),
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File("one_wire_slave.h"),
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File("maxim_crc.h"),
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|
||||
@ -1,10 +1,54 @@
|
||||
#include <furi.h>
|
||||
|
||||
/**
|
||||
* Timings based on Application Note 126:
|
||||
* https://www.analog.com/media/en/technical-documentation/tech-articles/1wire-communication-through-software--maxim-integrated.pdf
|
||||
*/
|
||||
|
||||
#include "one_wire_host.h"
|
||||
#include "one_wire_host_timing.h"
|
||||
|
||||
typedef struct {
|
||||
uint16_t a;
|
||||
uint16_t b;
|
||||
uint16_t c;
|
||||
uint16_t d;
|
||||
uint16_t e;
|
||||
uint16_t f;
|
||||
uint16_t g;
|
||||
uint16_t h;
|
||||
uint16_t i;
|
||||
uint16_t j;
|
||||
} OneWireHostTimings;
|
||||
|
||||
static const OneWireHostTimings onewire_host_timings_normal = {
|
||||
.a = 9,
|
||||
.b = 64,
|
||||
.c = 64,
|
||||
.d = 14,
|
||||
.e = 9,
|
||||
.f = 55,
|
||||
.g = 0,
|
||||
.h = 480,
|
||||
.i = 70,
|
||||
.j = 410,
|
||||
};
|
||||
|
||||
static const OneWireHostTimings onewire_host_timings_overdrive = {
|
||||
.a = 1,
|
||||
.b = 8,
|
||||
.c = 8,
|
||||
.d = 3,
|
||||
.e = 1,
|
||||
.f = 7,
|
||||
.g = 3,
|
||||
.h = 70,
|
||||
.i = 9,
|
||||
.j = 40,
|
||||
};
|
||||
|
||||
struct OneWireHost {
|
||||
const GpioPin* gpio_pin;
|
||||
const OneWireHostTimings* timings;
|
||||
unsigned char saved_rom[8]; /** < global search state */
|
||||
uint8_t last_discrepancy;
|
||||
uint8_t last_family_discrepancy;
|
||||
@ -15,6 +59,7 @@ OneWireHost* onewire_host_alloc(const GpioPin* gpio_pin) {
|
||||
OneWireHost* host = malloc(sizeof(OneWireHost));
|
||||
host->gpio_pin = gpio_pin;
|
||||
onewire_host_reset_search(host);
|
||||
onewire_host_set_overdrive(host, false);
|
||||
return host;
|
||||
}
|
||||
|
||||
@ -27,6 +72,8 @@ bool onewire_host_reset(OneWireHost* host) {
|
||||
uint8_t r;
|
||||
uint8_t retries = 125;
|
||||
|
||||
const OneWireHostTimings* timings = host->timings;
|
||||
|
||||
// wait until the gpio is high
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
do {
|
||||
@ -35,19 +82,19 @@ bool onewire_host_reset(OneWireHost* host) {
|
||||
} while(!furi_hal_gpio_read(host->gpio_pin));
|
||||
|
||||
// pre delay
|
||||
furi_delay_us(OWH_RESET_DELAY_PRE);
|
||||
furi_delay_us(timings->g);
|
||||
|
||||
// drive low
|
||||
furi_hal_gpio_write(host->gpio_pin, false);
|
||||
furi_delay_us(OWH_RESET_DRIVE);
|
||||
furi_delay_us(timings->h);
|
||||
|
||||
// release
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
furi_delay_us(OWH_RESET_RELEASE);
|
||||
furi_delay_us(timings->i);
|
||||
|
||||
// read and post delay
|
||||
r = !furi_hal_gpio_read(host->gpio_pin);
|
||||
furi_delay_us(OWH_RESET_DELAY_POST);
|
||||
furi_delay_us(timings->j);
|
||||
|
||||
return r;
|
||||
}
|
||||
@ -55,17 +102,19 @@ bool onewire_host_reset(OneWireHost* host) {
|
||||
bool onewire_host_read_bit(OneWireHost* host) {
|
||||
bool result;
|
||||
|
||||
const OneWireHostTimings* timings = host->timings;
|
||||
|
||||
// drive low
|
||||
furi_hal_gpio_write(host->gpio_pin, false);
|
||||
furi_delay_us(OWH_READ_DRIVE);
|
||||
furi_delay_us(timings->a);
|
||||
|
||||
// release
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
furi_delay_us(OWH_READ_RELEASE);
|
||||
furi_delay_us(timings->e);
|
||||
|
||||
// read and post delay
|
||||
result = furi_hal_gpio_read(host->gpio_pin);
|
||||
furi_delay_us(OWH_READ_DELAY_POST);
|
||||
furi_delay_us(timings->f);
|
||||
|
||||
return result;
|
||||
}
|
||||
@ -89,22 +138,24 @@ void onewire_host_read_bytes(OneWireHost* host, uint8_t* buffer, uint16_t count)
|
||||
}
|
||||
|
||||
void onewire_host_write_bit(OneWireHost* host, bool value) {
|
||||
const OneWireHostTimings* timings = host->timings;
|
||||
|
||||
if(value) {
|
||||
// drive low
|
||||
furi_hal_gpio_write(host->gpio_pin, false);
|
||||
furi_delay_us(OWH_WRITE_1_DRIVE);
|
||||
furi_delay_us(timings->a);
|
||||
|
||||
// release
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
furi_delay_us(OWH_WRITE_1_RELEASE);
|
||||
furi_delay_us(timings->b);
|
||||
} else {
|
||||
// drive low
|
||||
furi_hal_gpio_write(host->gpio_pin, false);
|
||||
furi_delay_us(OWH_WRITE_0_DRIVE);
|
||||
furi_delay_us(timings->c);
|
||||
|
||||
// release
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
furi_delay_us(OWH_WRITE_0_RELEASE);
|
||||
furi_delay_us(timings->d);
|
||||
}
|
||||
}
|
||||
|
||||
@ -122,10 +173,6 @@ void onewire_host_write_bytes(OneWireHost* host, const uint8_t* buffer, uint16_t
|
||||
}
|
||||
}
|
||||
|
||||
void onewire_host_skip(OneWireHost* host) {
|
||||
onewire_host_write(host, 0xCC);
|
||||
}
|
||||
|
||||
void onewire_host_start(OneWireHost* host) {
|
||||
furi_hal_gpio_write(host->gpio_pin, true);
|
||||
furi_hal_gpio_init(host->gpio_pin, GpioModeOutputOpenDrain, GpioPullNo, GpioSpeedLow);
|
||||
@ -154,7 +201,7 @@ void onewire_host_target_search(OneWireHost* host, uint8_t family_code) {
|
||||
host->last_device_flag = false;
|
||||
}
|
||||
|
||||
uint8_t onewire_host_search(OneWireHost* host, uint8_t* new_addr, OneWireHostSearchMode mode) {
|
||||
bool onewire_host_search(OneWireHost* host, uint8_t* new_addr, OneWireHostSearchMode mode) {
|
||||
uint8_t id_bit_number;
|
||||
uint8_t last_zero, rom_byte_number, search_result;
|
||||
uint8_t id_bit, cmp_id_bit;
|
||||
@ -268,3 +315,7 @@ uint8_t onewire_host_search(OneWireHost* host, uint8_t* new_addr, OneWireHostSea
|
||||
|
||||
return search_result;
|
||||
}
|
||||
|
||||
void onewire_host_set_overdrive(OneWireHost* host, bool set) {
|
||||
host->timings = set ? &onewire_host_timings_overdrive : &onewire_host_timings_normal;
|
||||
}
|
||||
|
||||
@ -15,114 +15,115 @@ extern "C" {
|
||||
|
||||
typedef enum {
|
||||
OneWireHostSearchModeConditional = 0, /**< Search for alarmed device */
|
||||
OneWireHostSearchModeNormal = 1, /**< Search all devices */
|
||||
OneWireHostSearchModeNormal = 1, /**< Search for all devices */
|
||||
} OneWireHostSearchMode;
|
||||
|
||||
typedef struct OneWireHost OneWireHost;
|
||||
|
||||
/**
|
||||
* Allocate onewire host bus
|
||||
* @param pin
|
||||
* @return OneWireHost*
|
||||
* Allocate OneWireHost instance
|
||||
* @param [in] gpio_pin connection pin
|
||||
* @return pointer to OneWireHost instance
|
||||
*/
|
||||
OneWireHost* onewire_host_alloc(const GpioPin* gpio_pin);
|
||||
|
||||
/**
|
||||
* Deallocate onewire host bus
|
||||
* @param host
|
||||
* Destroy OneWireHost instance, free resources
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
*/
|
||||
void onewire_host_free(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Reset bus
|
||||
* @param host
|
||||
* @return bool
|
||||
* Reset the 1-Wire bus
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @return true if presence was detected, false otherwise
|
||||
*/
|
||||
bool onewire_host_reset(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Read one bit
|
||||
* @param host
|
||||
* @return bool
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @return received bit value
|
||||
*/
|
||||
bool onewire_host_read_bit(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Read one byte
|
||||
* @param host
|
||||
* @return uint8_t
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @return received byte value
|
||||
*/
|
||||
uint8_t onewire_host_read(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Read many bytes
|
||||
* @param host
|
||||
* @param buffer
|
||||
* @param count
|
||||
* Read one or more bytes
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param [out] buffer received data buffer
|
||||
* @param [in] count number of bytes to read
|
||||
*/
|
||||
void onewire_host_read_bytes(OneWireHost* host, uint8_t* buffer, uint16_t count);
|
||||
|
||||
/**
|
||||
* Write one bit
|
||||
* @param host
|
||||
* @param value
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param value bit value to write
|
||||
*/
|
||||
void onewire_host_write_bit(OneWireHost* host, bool value);
|
||||
|
||||
/**
|
||||
* Write one byte
|
||||
* @param host
|
||||
* @param value
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param value byte value to write
|
||||
*/
|
||||
void onewire_host_write(OneWireHost* host, uint8_t value);
|
||||
|
||||
/**
|
||||
* Write many bytes
|
||||
* @param host
|
||||
* @param buffer
|
||||
* @param count
|
||||
* Write one or more bytes
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param [in] buffer pointer to the data to write
|
||||
* @param [in] count size of the data to write
|
||||
*/
|
||||
void onewire_host_write_bytes(OneWireHost* host, const uint8_t* buffer, uint16_t count);
|
||||
|
||||
/**
|
||||
* Skip ROM command
|
||||
* @param host
|
||||
*/
|
||||
void onewire_host_skip(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Start working with the bus
|
||||
* @param host
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
*/
|
||||
void onewire_host_start(OneWireHost* host);
|
||||
|
||||
/**
|
||||
* Stop working with the bus
|
||||
* @param host
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
*/
|
||||
void onewire_host_stop(OneWireHost* host);
|
||||
|
||||
/**
|
||||
*
|
||||
* @param host
|
||||
* Reset previous search results
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
*/
|
||||
void onewire_host_reset_search(OneWireHost* host);
|
||||
|
||||
/**
|
||||
*
|
||||
* @param host
|
||||
* @param family_code
|
||||
* Set the family code to search for
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param [in] family_code device family code
|
||||
*/
|
||||
void onewire_host_target_search(OneWireHost* host, uint8_t family_code);
|
||||
|
||||
/**
|
||||
*
|
||||
* @param host
|
||||
* @param newAddr
|
||||
* @param mode
|
||||
* @return uint8_t
|
||||
* Search for devices on the 1-Wire bus
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param [out] new_addr pointer to the buffer to contain the unique ROM of the found device
|
||||
* @param [in] mode search mode
|
||||
* @return true on success, false otherwise
|
||||
*/
|
||||
uint8_t onewire_host_search(OneWireHost* host, uint8_t* new_addr, OneWireHostSearchMode mode);
|
||||
bool onewire_host_search(OneWireHost* host, uint8_t* new_addr, OneWireHostSearchMode mode);
|
||||
|
||||
/**
|
||||
* Enable overdrive mode
|
||||
* @param [in] host pointer to OneWireHost instance
|
||||
* @param [in] set true to turn overdrive on, false to turn it off
|
||||
*/
|
||||
void onewire_host_set_overdrive(OneWireHost* host, bool set);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
|
||||
@ -1,30 +0,0 @@
|
||||
/**
|
||||
* @file one_wire_host_timing.h
|
||||
*
|
||||
* 1-Wire library, timing list
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#define OWH_TIMING_A 9
|
||||
#define OWH_TIMING_B 64
|
||||
#define OWH_TIMING_C 64
|
||||
#define OWH_TIMING_D 14
|
||||
#define OWH_TIMING_E 9
|
||||
#define OWH_TIMING_F 55
|
||||
#define OWH_TIMING_G 0
|
||||
#define OWH_TIMING_H 480
|
||||
#define OWH_TIMING_I 70
|
||||
#define OWH_TIMING_J 410
|
||||
|
||||
#define OWH_WRITE_1_DRIVE OWH_TIMING_A
|
||||
#define OWH_WRITE_1_RELEASE OWH_TIMING_B
|
||||
#define OWH_WRITE_0_DRIVE OWH_TIMING_C
|
||||
#define OWH_WRITE_0_RELEASE OWH_TIMING_D
|
||||
#define OWH_READ_DRIVE 3
|
||||
#define OWH_READ_RELEASE OWH_TIMING_E
|
||||
#define OWH_READ_DELAY_POST OWH_TIMING_F
|
||||
#define OWH_RESET_DELAY_PRE OWH_TIMING_G
|
||||
#define OWH_RESET_DRIVE OWH_TIMING_H
|
||||
#define OWH_RESET_RELEASE OWH_TIMING_I
|
||||
#define OWH_RESET_DELAY_POST OWH_TIMING_J
|
||||
@ -3,20 +3,7 @@
|
||||
#include <furi.h>
|
||||
#include <furi_hal.h>
|
||||
|
||||
#define ONEWIRE_TRSTL_MIN 270 /* Minimum Reset Low time */
|
||||
#define ONEWIRE_TRSTL_MAX 1200 /* Maximum Reset Low time */
|
||||
|
||||
#define ONEWIRE_TPDH_TYP 20 /* Typical Presence Detect High time */
|
||||
#define ONEWIRE_TPDL_MIN 100 /* Minimum Presence Detect Low time */
|
||||
#define ONEWIRE_TPDL_MAX 480 /* Maximum Presence Detect Low time */
|
||||
|
||||
#define ONEWIRE_TSLOT_MIN 60 /* Minimum Read/Write Slot time */
|
||||
#define ONEWIRE_TSLOT_MAX 135 /* Maximum Read/Write Slot time */
|
||||
|
||||
#define ONEWIRE_TW1L_MAX 20 /* Maximum Master Write 1 time */
|
||||
#define ONEWIRE_TRL_TMSR_MAX 30 /* Maximum Master Read Low + Read Sample time */
|
||||
|
||||
#define ONEWIRE_TH_TIMEOUT 15000 /* Maximum time before general timeout */
|
||||
#define TH_TIMEOUT_MAX 15000 /* Maximum time before general timeout */
|
||||
|
||||
typedef enum {
|
||||
OneWireSlaveErrorNone = 0,
|
||||
@ -26,10 +13,29 @@ typedef enum {
|
||||
OneWireSlaveErrorTimeout,
|
||||
} OneWireSlaveError;
|
||||
|
||||
typedef struct {
|
||||
uint16_t trstl_min; /* Minimum Reset Low time */
|
||||
uint16_t trstl_max; /* Maximum Reset Low time */
|
||||
|
||||
uint16_t tpdh_typ; /* Typical Presence Detect High time */
|
||||
uint16_t tpdl_min; /* Minimum Presence Detect Low time */
|
||||
uint16_t tpdl_max; /* Maximum Presence Detect Low time */
|
||||
|
||||
uint16_t tslot_min; /* Minimum Read/Write Slot time */
|
||||
uint16_t tslot_max; /* Maximum Read/Write Slot time */
|
||||
|
||||
uint16_t tw1l_max; /* Maximum Master Write 1 time */
|
||||
uint16_t trl_tmsr_max; /* Maximum Master Read Low + Read Sample time */
|
||||
} OneWireSlaveTimings;
|
||||
|
||||
struct OneWireSlave {
|
||||
const GpioPin* gpio_pin;
|
||||
const OneWireSlaveTimings* timings;
|
||||
OneWireSlaveError error;
|
||||
|
||||
bool is_first_reset;
|
||||
bool is_short_reset;
|
||||
|
||||
OneWireSlaveResetCallback reset_callback;
|
||||
OneWireSlaveCommandCallback command_callback;
|
||||
OneWireSlaveResultCallback result_callback;
|
||||
@ -39,42 +45,72 @@ struct OneWireSlave {
|
||||
void* command_callback_context;
|
||||
};
|
||||
|
||||
static const OneWireSlaveTimings onewire_slave_timings_normal = {
|
||||
.trstl_min = 270,
|
||||
.trstl_max = 1200,
|
||||
|
||||
.tpdh_typ = 20,
|
||||
.tpdl_min = 100,
|
||||
.tpdl_max = 480,
|
||||
|
||||
.tslot_min = 60,
|
||||
.tslot_max = 135,
|
||||
|
||||
.tw1l_max = 20,
|
||||
.trl_tmsr_max = 30,
|
||||
};
|
||||
|
||||
static const OneWireSlaveTimings onewire_slave_timings_overdrive = {
|
||||
.trstl_min = 48,
|
||||
.trstl_max = 80,
|
||||
|
||||
.tpdh_typ = 0,
|
||||
.tpdl_min = 8,
|
||||
.tpdl_max = 24,
|
||||
|
||||
.tslot_min = 6,
|
||||
.tslot_max = 16,
|
||||
|
||||
.tw1l_max = 2,
|
||||
.trl_tmsr_max = 3,
|
||||
};
|
||||
|
||||
/*********************** PRIVATE ***********************/
|
||||
|
||||
static uint32_t
|
||||
onewire_slave_wait_while_gpio_is(OneWireSlave* bus, uint32_t time, const bool pin_value) {
|
||||
uint32_t start = DWT->CYCCNT;
|
||||
uint32_t time_ticks = time * furi_hal_cortex_instructions_per_microsecond();
|
||||
uint32_t time_captured;
|
||||
static bool
|
||||
onewire_slave_wait_while_gpio_is(OneWireSlave* bus, uint32_t time_us, const bool pin_value) {
|
||||
const uint32_t time_start = DWT->CYCCNT;
|
||||
const uint32_t time_ticks = time_us * furi_hal_cortex_instructions_per_microsecond();
|
||||
|
||||
uint32_t time_elapsed;
|
||||
|
||||
do { //-V1044
|
||||
time_captured = DWT->CYCCNT;
|
||||
time_elapsed = DWT->CYCCNT - time_start;
|
||||
if(furi_hal_gpio_read(bus->gpio_pin) != pin_value) {
|
||||
uint32_t remaining_time = time_ticks - (time_captured - start);
|
||||
remaining_time /= furi_hal_cortex_instructions_per_microsecond();
|
||||
return remaining_time;
|
||||
return time_ticks >= time_elapsed;
|
||||
}
|
||||
} while((time_captured - start) < time_ticks);
|
||||
} while(time_elapsed < time_ticks);
|
||||
|
||||
return 0;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool onewire_slave_show_presence(OneWireSlave* bus) {
|
||||
static inline bool onewire_slave_show_presence(OneWireSlave* bus) {
|
||||
const OneWireSlaveTimings* timings = bus->timings;
|
||||
// wait until the bus is high (might return immediately)
|
||||
onewire_slave_wait_while_gpio_is(bus, ONEWIRE_TRSTL_MAX, false);
|
||||
onewire_slave_wait_while_gpio_is(bus, timings->trstl_max, false);
|
||||
// wait while master delay presence check
|
||||
furi_delay_us(ONEWIRE_TPDH_TYP);
|
||||
furi_delay_us(timings->tpdh_typ);
|
||||
|
||||
// show presence
|
||||
furi_hal_gpio_write(bus->gpio_pin, false);
|
||||
furi_delay_us(ONEWIRE_TPDL_MIN);
|
||||
furi_delay_us(timings->tpdl_min);
|
||||
furi_hal_gpio_write(bus->gpio_pin, true);
|
||||
|
||||
// somebody also can show presence
|
||||
const uint32_t wait_low_time = ONEWIRE_TPDL_MAX - ONEWIRE_TPDL_MIN;
|
||||
const uint32_t wait_low_time = timings->tpdl_max - timings->tpdl_min;
|
||||
|
||||
// so we will wait
|
||||
if(onewire_slave_wait_while_gpio_is(bus, wait_low_time, false) == 0) {
|
||||
if(!onewire_slave_wait_while_gpio_is(bus, wait_low_time, false)) {
|
||||
bus->error = OneWireSlaveErrorPresenceConflict;
|
||||
return false;
|
||||
}
|
||||
@ -85,27 +121,36 @@ static bool onewire_slave_show_presence(OneWireSlave* bus) {
|
||||
static inline bool onewire_slave_receive_and_process_command(OneWireSlave* bus) {
|
||||
/* Reset condition detected, send a presence pulse and reset protocol state */
|
||||
if(bus->error == OneWireSlaveErrorResetInProgress) {
|
||||
if(onewire_slave_show_presence(bus)) {
|
||||
bus->error = OneWireSlaveErrorNone;
|
||||
if(!bus->is_first_reset) {
|
||||
/* Guess the reset type */
|
||||
bus->is_short_reset = onewire_slave_wait_while_gpio_is(
|
||||
bus,
|
||||
onewire_slave_timings_overdrive.trstl_max -
|
||||
onewire_slave_timings_overdrive.tslot_max,
|
||||
false);
|
||||
} else {
|
||||
bus->is_first_reset = false;
|
||||
}
|
||||
|
||||
if(bus->reset_callback != NULL) {
|
||||
bus->reset_callback(bus->reset_callback_context);
|
||||
furi_assert(bus->reset_callback);
|
||||
|
||||
if(bus->reset_callback(bus->is_short_reset, bus->reset_callback_context)) {
|
||||
if(onewire_slave_show_presence(bus)) {
|
||||
bus->error = OneWireSlaveErrorNone;
|
||||
return true;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
} else if(bus->error == OneWireSlaveErrorNone) {
|
||||
uint8_t command;
|
||||
if(!onewire_slave_receive(bus, &command, 1)) {
|
||||
/* Upon failure, request an additional iteration to
|
||||
choose the appropriate action by checking bus->error */
|
||||
return true;
|
||||
} else if(bus->command_callback) {
|
||||
return bus->command_callback(command, bus->command_callback_context);
|
||||
} else {
|
||||
bus->error = OneWireSlaveErrorInvalidCommand;
|
||||
if(onewire_slave_receive(bus, &command, sizeof(command))) {
|
||||
furi_assert(bus->command_callback);
|
||||
if(bus->command_callback(command, bus->command_callback_context)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
return (bus->error == OneWireSlaveErrorResetInProgress);
|
||||
}
|
||||
|
||||
return false;
|
||||
@ -115,9 +160,6 @@ static inline bool onewire_slave_bus_start(OneWireSlave* bus) {
|
||||
FURI_CRITICAL_ENTER();
|
||||
furi_hal_gpio_init(bus->gpio_pin, GpioModeOutputOpenDrain, GpioPullNo, GpioSpeedLow);
|
||||
|
||||
/* Start in Reset state in order to send a presence pulse immediately */
|
||||
bus->error = OneWireSlaveErrorResetInProgress;
|
||||
|
||||
while(onewire_slave_receive_and_process_command(bus))
|
||||
;
|
||||
|
||||
@ -139,7 +181,15 @@ static void onewire_slave_exti_callback(void* context) {
|
||||
const uint32_t pulse_length =
|
||||
(DWT->CYCCNT - pulse_start) / furi_hal_cortex_instructions_per_microsecond();
|
||||
|
||||
if((pulse_length >= ONEWIRE_TRSTL_MIN) && pulse_length <= (ONEWIRE_TRSTL_MAX)) {
|
||||
if((pulse_length >= onewire_slave_timings_overdrive.trstl_min) &&
|
||||
(pulse_length <= onewire_slave_timings_normal.trstl_max)) {
|
||||
/* Start in reset state in order to send a presence pulse immediately */
|
||||
bus->error = OneWireSlaveErrorResetInProgress;
|
||||
/* Determine reset type (chooses speed mode if supported by the emulated device) */
|
||||
bus->is_short_reset = pulse_length <= onewire_slave_timings_overdrive.trstl_max;
|
||||
/* Initial reset allows going directly into overdrive mode */
|
||||
bus->is_first_reset = true;
|
||||
|
||||
const bool result = onewire_slave_bus_start(bus);
|
||||
|
||||
if(result && bus->result_callback != NULL) {
|
||||
@ -158,6 +208,7 @@ OneWireSlave* onewire_slave_alloc(const GpioPin* gpio_pin) {
|
||||
OneWireSlave* bus = malloc(sizeof(OneWireSlave));
|
||||
|
||||
bus->gpio_pin = gpio_pin;
|
||||
bus->timings = &onewire_slave_timings_normal;
|
||||
bus->error = OneWireSlaveErrorNone;
|
||||
|
||||
return bus;
|
||||
@ -205,52 +256,45 @@ void onewire_slave_set_result_callback(
|
||||
}
|
||||
|
||||
bool onewire_slave_receive_bit(OneWireSlave* bus) {
|
||||
const OneWireSlaveTimings* timings = bus->timings;
|
||||
// wait while bus is low
|
||||
uint32_t time = ONEWIRE_TSLOT_MAX;
|
||||
time = onewire_slave_wait_while_gpio_is(bus, time, false);
|
||||
if(time == 0) {
|
||||
if(!onewire_slave_wait_while_gpio_is(bus, timings->tslot_max, false)) {
|
||||
bus->error = OneWireSlaveErrorResetInProgress;
|
||||
return false;
|
||||
}
|
||||
|
||||
// wait while bus is high
|
||||
time = ONEWIRE_TH_TIMEOUT;
|
||||
time = onewire_slave_wait_while_gpio_is(bus, time, true);
|
||||
if(time == 0) {
|
||||
if(!onewire_slave_wait_while_gpio_is(bus, TH_TIMEOUT_MAX, true)) {
|
||||
bus->error = OneWireSlaveErrorTimeout;
|
||||
return false;
|
||||
}
|
||||
|
||||
// wait a time of zero
|
||||
time = ONEWIRE_TW1L_MAX;
|
||||
time = onewire_slave_wait_while_gpio_is(bus, time, false);
|
||||
|
||||
return (time > 0);
|
||||
return onewire_slave_wait_while_gpio_is(bus, timings->tw1l_max, false);
|
||||
}
|
||||
|
||||
bool onewire_slave_send_bit(OneWireSlave* bus, bool value) {
|
||||
const OneWireSlaveTimings* timings = bus->timings;
|
||||
// wait while bus is low
|
||||
uint32_t time = ONEWIRE_TSLOT_MAX;
|
||||
time = onewire_slave_wait_while_gpio_is(bus, time, false);
|
||||
if(time == 0) {
|
||||
if(!onewire_slave_wait_while_gpio_is(bus, timings->tslot_max, false)) {
|
||||
bus->error = OneWireSlaveErrorResetInProgress;
|
||||
return false;
|
||||
}
|
||||
|
||||
// wait while bus is high
|
||||
time = ONEWIRE_TH_TIMEOUT;
|
||||
time = onewire_slave_wait_while_gpio_is(bus, time, true);
|
||||
if(time == 0) {
|
||||
if(!onewire_slave_wait_while_gpio_is(bus, TH_TIMEOUT_MAX, true)) {
|
||||
bus->error = OneWireSlaveErrorTimeout;
|
||||
return false;
|
||||
}
|
||||
|
||||
// choose write time
|
||||
uint32_t time;
|
||||
|
||||
if(!value) {
|
||||
furi_hal_gpio_write(bus->gpio_pin, false);
|
||||
time = ONEWIRE_TRL_TMSR_MAX;
|
||||
time = timings->trl_tmsr_max;
|
||||
} else {
|
||||
time = ONEWIRE_TSLOT_MIN;
|
||||
time = timings->tslot_min;
|
||||
}
|
||||
|
||||
// hold line for ZERO or ONE time
|
||||
@ -301,3 +345,13 @@ bool onewire_slave_receive(OneWireSlave* bus, uint8_t* data, size_t data_size) {
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
void onewire_slave_set_overdrive(OneWireSlave* bus, bool set) {
|
||||
const OneWireSlaveTimings* new_timings = set ? &onewire_slave_timings_overdrive :
|
||||
&onewire_slave_timings_normal;
|
||||
if(bus->timings != new_timings) {
|
||||
/* Prevent erroneous reset by waiting for the previous time slot to finish */
|
||||
onewire_slave_wait_while_gpio_is(bus, bus->timings->tslot_max, false);
|
||||
bus->timings = new_timings;
|
||||
}
|
||||
}
|
||||
|
||||
@ -18,68 +18,85 @@ extern "C" {
|
||||
typedef struct OneWireDevice OneWireDevice;
|
||||
typedef struct OneWireSlave OneWireSlave;
|
||||
|
||||
typedef void (*OneWireSlaveResetCallback)(void* context);
|
||||
typedef void (*OneWireSlaveResultCallback)(void* context);
|
||||
typedef bool (*OneWireSlaveResetCallback)(bool is_short, void* context);
|
||||
typedef bool (*OneWireSlaveCommandCallback)(uint8_t command, void* context);
|
||||
typedef void (*OneWireSlaveResultCallback)(void* context);
|
||||
|
||||
/**
|
||||
* Allocate onewire slave
|
||||
* @param gpio_pin
|
||||
* @return OneWireSlave*
|
||||
* Allocate OneWireSlave instance
|
||||
* @param [in] gpio_pin connection pin
|
||||
* @return pointer to OneWireSlave instance
|
||||
*/
|
||||
OneWireSlave* onewire_slave_alloc(const GpioPin* gpio_pin);
|
||||
|
||||
/**
|
||||
* Free onewire slave
|
||||
* @param bus
|
||||
* Destroy OneWireSlave instance, free resources
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
*/
|
||||
void onewire_slave_free(OneWireSlave* bus);
|
||||
|
||||
/**
|
||||
* Start working with the bus
|
||||
* @param bus
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
*/
|
||||
void onewire_slave_start(OneWireSlave* bus);
|
||||
|
||||
/**
|
||||
* Stop working with the bus
|
||||
* @param bus
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
*/
|
||||
void onewire_slave_stop(OneWireSlave* bus);
|
||||
|
||||
/**
|
||||
* TODO: description comment
|
||||
* Receive one bit
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @return received bit value
|
||||
*/
|
||||
bool onewire_slave_receive_bit(OneWireSlave* bus);
|
||||
|
||||
/**
|
||||
* TODO: description comment
|
||||
* Send one bit
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] value bit value to send
|
||||
* @return true on success, false on failure
|
||||
*/
|
||||
bool onewire_slave_send_bit(OneWireSlave* bus, bool value);
|
||||
|
||||
/**
|
||||
* Send data
|
||||
* @param bus
|
||||
* @param data
|
||||
* @param data_size
|
||||
* @return bool
|
||||
* Send one or more bytes of data
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] data pointer to the data to send
|
||||
* @param [in] data_size size of the data to send
|
||||
* @return true on success, false on failure
|
||||
*/
|
||||
bool onewire_slave_send(OneWireSlave* bus, const uint8_t* data, size_t data_size);
|
||||
|
||||
/**
|
||||
* Receive data
|
||||
* @param bus
|
||||
* @param data
|
||||
* @param data_size
|
||||
* @return bool
|
||||
* Receive one or more bytes of data
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [out] data pointer to the receive buffer
|
||||
* @param [in] data_size number of bytes to receive
|
||||
* @return true on success, false on failure
|
||||
*/
|
||||
bool onewire_slave_receive(OneWireSlave* bus, uint8_t* data, size_t data_size);
|
||||
|
||||
/**
|
||||
* Set a callback to be called on each reset
|
||||
* @param bus
|
||||
* @param callback
|
||||
* @param context
|
||||
* Enable overdrive mode
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] set true to turn overdrive on, false to turn it off
|
||||
*/
|
||||
void onewire_slave_set_overdrive(OneWireSlave* bus, bool set);
|
||||
|
||||
/**
|
||||
* Set a callback function to be called on each reset.
|
||||
* The return value of the callback determines whether the emulated device
|
||||
* supports the short reset (passed as the is_short parameter).
|
||||
* In most applications, it should also call onewire_slave_set_overdrive()
|
||||
* to set the appropriate speed mode.
|
||||
*
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] callback pointer to a callback function
|
||||
* @param [in] context additional parameter to be passed to the callback
|
||||
*/
|
||||
void onewire_slave_set_reset_callback(
|
||||
OneWireSlave* bus,
|
||||
@ -87,10 +104,13 @@ void onewire_slave_set_reset_callback(
|
||||
void* context);
|
||||
|
||||
/**
|
||||
* Set a callback to be called on each command
|
||||
* @param bus
|
||||
* @param callback
|
||||
* @param context
|
||||
* Set a callback function to be called on each command.
|
||||
* The return value of the callback determines whether further operation
|
||||
* is possible. As a rule of thumb, return true unless a critical error happened.
|
||||
*
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] callback pointer to a callback function
|
||||
* @param [in] context additional parameter to be passed to the callback
|
||||
*/
|
||||
void onewire_slave_set_command_callback(
|
||||
OneWireSlave* bus,
|
||||
@ -99,9 +119,9 @@ void onewire_slave_set_command_callback(
|
||||
|
||||
/**
|
||||
* Set a callback to report emulation success
|
||||
* @param bus
|
||||
* @param result_cb
|
||||
* @param context
|
||||
* @param [in] bus pointer to OneWireSlave instance
|
||||
* @param [in] result_cb pointer to a callback function
|
||||
* @param [in] context additional parameter to be passed to the callback
|
||||
*/
|
||||
void onewire_slave_set_result_callback(
|
||||
OneWireSlave* bus,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user