liz/flipperzero-firmware
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[FL-3057] Allow use of any suitable pin for 1-Wire devices (#2350)

Browse Source 
* Add 1-wire thermometer example app stub
* Working 1-wire thermometer app
* Refactor app to use threads
* Clean up code, add comments
* Add CRC checking
* Increase update period
* Fix error in fbt
* Revert the old update period
* Use settable pin in onewire_host
* Use settable pin for onewire_slave
* Clear EXTI flag after callback, make private methods static in onewire_slave
* Do not hardcode GPIO pin number
* Remove iButton hal from furi_hal_rfid
* Remove most of furi_hal_ibutton
* Add some of furi_hal_ibutton back
* Slightly neater code
* Fix formatting
* Fix PVS-studio warnings
* Update CODEOWNERS
* Add furi_hal_gpio_get_ext_pin_number
* Create README.md
* FuriHal: move furi_hal_gpio_get_ext_pin_number to resources

---------

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
This commit is contained in:
Georgii Surkov
2023-02-08 08:40:44 +03:00
committed by GitHub
parent e3d473bf42
commit 7a3a1aaf0d
22 changed files with 592 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
lib/one_wire/one_wire_host.c
View File

@@ -1,18 +1,19 @@
#include <furi.h>
#include <furi_hal.h>
#include "one_wire_host.h"
#include "one_wire_host_timing.h"
struct OneWireHost {
// global search state
unsigned char saved_rom[8];
const GpioPin* gpio_pin;
unsigned char saved_rom[8]; /** < global search state */
uint8_t last_discrepancy;
uint8_t last_family_discrepancy;
bool last_device_flag;
};
OneWireHost* onewire_host_alloc() {
OneWireHost* onewire_host_alloc(const GpioPin* gpio_pin) {
OneWireHost* host = malloc(sizeof(OneWireHost));
host->gpio_pin = gpio_pin;
onewire_host_reset_search(host);
return host;
}
@@ -23,49 +24,47 @@ void onewire_host_free(OneWireHost* host) {
}
bool onewire_host_reset(OneWireHost* host) {
UNUSED(host);
uint8_t r;
uint8_t retries = 125;
// wait until the gpio is high
furi_hal_ibutton_pin_high();
furi_hal_gpio_write(host->gpio_pin, true);
do {
if(--retries == 0) return 0;
furi_delay_us(2);
} while(!furi_hal_ibutton_pin_get_level());
} while(!furi_hal_gpio_read(host->gpio_pin));
// pre delay
furi_delay_us(OWH_RESET_DELAY_PRE);
// drive low
furi_hal_ibutton_pin_low();
furi_hal_gpio_write(host->gpio_pin, false);
furi_delay_us(OWH_RESET_DRIVE);
// release
furi_hal_ibutton_pin_high();
furi_hal_gpio_write(host->gpio_pin, true);
furi_delay_us(OWH_RESET_RELEASE);
// read and post delay
r = !furi_hal_ibutton_pin_get_level();
r = !furi_hal_gpio_read(host->gpio_pin);
furi_delay_us(OWH_RESET_DELAY_POST);
return r;
}
bool onewire_host_read_bit(OneWireHost* host) {
UNUSED(host);
bool result;
// drive low
furi_hal_ibutton_pin_low();
furi_hal_gpio_write(host->gpio_pin, false);
furi_delay_us(OWH_READ_DRIVE);
// release
furi_hal_ibutton_pin_high();
furi_hal_gpio_write(host->gpio_pin, true);
furi_delay_us(OWH_READ_RELEASE);
// read and post delay
result = furi_hal_ibutton_pin_get_level();
result = furi_hal_gpio_read(host->gpio_pin);
furi_delay_us(OWH_READ_DELAY_POST);
return result;
@@ -90,22 +89,21 @@ void onewire_host_read_bytes(OneWireHost* host, uint8_t* buffer, uint16_t count)
}
void onewire_host_write_bit(OneWireHost* host, bool value) {
UNUSED(host);
if(value) {
// drive low
furi_hal_ibutton_pin_low();
furi_hal_gpio_write(host->gpio_pin, false);
furi_delay_us(OWH_WRITE_1_DRIVE);
// release
furi_hal_ibutton_pin_high();
furi_hal_gpio_write(host->gpio_pin, true);
furi_delay_us(OWH_WRITE_1_RELEASE);
} else {
// drive low
furi_hal_ibutton_pin_low();
furi_hal_gpio_write(host->gpio_pin, false);
furi_delay_us(OWH_WRITE_0_DRIVE);
// release
furi_hal_ibutton_pin_high();
furi_hal_gpio_write(host->gpio_pin, true);
furi_delay_us(OWH_WRITE_0_RELEASE);
}
}
@@ -123,13 +121,13 @@ void onewire_host_skip(OneWireHost* host) {
}
void onewire_host_start(OneWireHost* host) {
UNUSED(host);
furi_hal_ibutton_start_drive();
furi_hal_gpio_write(host->gpio_pin, true);
furi_hal_gpio_init(host->gpio_pin, GpioModeOutputOpenDrain, GpioPullNo, GpioSpeedLow);
}
void onewire_host_stop(OneWireHost* host) {
UNUSED(host);
furi_hal_ibutton_stop();
furi_hal_gpio_write(host->gpio_pin, true);
furi_hal_gpio_init(host->gpio_pin, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
}
void onewire_host_reset_search(OneWireHost* host) {
@@ -150,7 +148,7 @@ 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* newAddr, OneWireHostSearchMode mode) {
uint8_t 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;
@@ -259,7 +257,7 @@ uint8_t onewire_host_search(OneWireHost* host, uint8_t* newAddr, OneWireHostSear
host->last_family_discrepancy = 0;
search_result = false;
} else {
for(int i = 0; i < 8; i++) newAddr[i] = host->saved_rom[i];
for(int i = 0; i < 8; i++) new_addr[i] = host->saved_rom[i];
}
return search_result;