flipperzero-firmware/lib/onewire/one_wire_master.cpp

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#include "one_wire_master.h"
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#include "one_wire_timings.h"
OneWireMaster::OneWireMaster(const GpioPin* one_wire_gpio) {
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gpio = one_wire_gpio;
new iButton app (#328) * rename old ibutton app to ibutton-test * more renames * updated onewire library compilation condition * add submenu_clean subroutine * add index for submenu callback * c++ guard for gui modules * add released ibutton app * fix the position of the submenu window if there are too few items * iButton app basis * negative icon position info * fix submenu_clean subroutine * add ibutton app to applications makefile * add onewire key read routine to read mode * rename mode to scene * rename files and folder (mode to scene) * rename ibutton view to view manager * rename get_view to get_view_manager * cpp guards * key read, store and notify features * syntax fix * make iButtonScene functions pure virtual * fix syntax * add text store, add new scene (crc error) * not a key scene * syntax fix * read success scene * app, switching to the previous scene with the number of scenes to be skipped * scene whith menu when key is readed * fix font height calculation, fix offsets * add key write scene * view_dispatcher_remove_view subroutine * generic pause/resume os methods * fix furi_assert usage * key store, worker * fix pointer comparsion * saved keys, saved key action scenes * key delete/confirm delete scenes and routines * use last input subsystem changes * fix syntax * fix new model usage in submenu * fix includes * use vibro pin * use stored key name if valid * emulate scene * random name generator * name and save readed key scenes, new icon * fix icon position * fix text scene exit * fix naming, fix text placement, new info scene * state-driven cyfral decoder * better cyfral decoder * better cyfral decoder * one wire: search command set * metakom decoder * more key types * add next scene to error scenes * universal key reader * use new key reader * syntax fix * warning fix * byte input module template * new thread and insomnia api usage * New element: slightly rounded frame * Use elements_slightly_rounded_frame in text input * Gui test app: byte input usage * Byte input module: data drawing and selection * Byte input: comment currently unused fns * remove volatile qualifier * base byte input realisation * App gui test: remove internal fns visibility * Byne input, final version * test install gcc-arm-none-eabi-10-2020-q4-major * test install gcc-arm-none-eabi-10-2020-q4-major * App iButton: byte input view managment * App iButton: add key manually scenes * App iButton: rename scenes, add popup timeout * App iButton: use new scenes, new fn for rollback to specific prevous scene. * App iButton: remove byte input view on app exit * App iButton: edit key scene * Module byte input: reduce swintch value to uint8_t * Module byte input: switch from switch-case to if, unfortunately we need compile-time constants to use with switch * Icons: new small arrows * Module byte input: new arrangement of elements * OneWire slave lib: fix deattach sequence * App iButton: pulse sequencer * App iButton: add more keys to store * App iButton: split key worker to separate read/write/emulate entitys * App iButton: use new read/emulate entities * fix callback pointer saving * App iButton: use KeyReader error enum instead of KeyWorker error list handling * App iButton: do not use insomnia fns in pulse sequencer * App iButton: use KeyReader error enum in read scene * OneWire slave lib: more READ ROM command variants, call callback only if positive result * GPIO resources: add external gpio * App SD/NFC: removed application * App iButton-test: update to new light api * App iButton: update to new light-api * Outdated apps: add api-light-usage * Gpio: update SD card CS pin settings * API-power: added fns to disable/enable external 3v3 dc-dc * API-gpio: separated SD card detect routines * Resources: removed sd cs pin * SD card: low level init now resets card power supply * App SD-filesystem: use new card detect fns * SD card: fix low level init headers * SD card: more realilable low level init, power reset, exit from command read cycle conditionally * App SD-filesystem: led notifiers, init cycling * SD card: backport to F4 * Api PWM: add c++ guards * App iButton: yellow blink in emulate scene, vibro on * App iButton: one wire keys command set * App iButton: successful write scene * App iButton: key writer * App iButton: syntax fix * App iButton: notify write success * App iButton: fix double scene change * SD card: handle eject in init sequence * SD card: api to set level on detect gpio * SPI: api to set state on bus pins * SD card: set low state on bus pins while power reset * File select: init * File select: fix input consuming * SD Card: fixed dir open api error * SD-card: replace strncpy by strlcpy. Fix buffer overflow error. * API HAL OS: replace CMP based ticks with ARR based one, hard reset lptimer on reconfiguration. * GUI: More stack size for (temporary, wee need to implement sd card api in separate thread) * GUI: File select module. * App iButton-test: remove obsolete app Co-authored-by: rusdacent <rusdacentx0x08@gmail.com> Co-authored-by: coreglitch <mail@s3f.ru> Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
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reset_search();
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}
OneWireMaster::~OneWireMaster() {
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stop();
}
void OneWireMaster::start(void) {
hal_gpio_init(gpio, GpioModeOutputOpenDrain, GpioPullNo, GpioSpeedLow);
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}
void OneWireMaster::stop(void) {
hal_gpio_init(gpio, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
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}
new iButton app (#328) * rename old ibutton app to ibutton-test * more renames * updated onewire library compilation condition * add submenu_clean subroutine * add index for submenu callback * c++ guard for gui modules * add released ibutton app * fix the position of the submenu window if there are too few items * iButton app basis * negative icon position info * fix submenu_clean subroutine * add ibutton app to applications makefile * add onewire key read routine to read mode * rename mode to scene * rename files and folder (mode to scene) * rename ibutton view to view manager * rename get_view to get_view_manager * cpp guards * key read, store and notify features * syntax fix * make iButtonScene functions pure virtual * fix syntax * add text store, add new scene (crc error) * not a key scene * syntax fix * read success scene * app, switching to the previous scene with the number of scenes to be skipped * scene whith menu when key is readed * fix font height calculation, fix offsets * add key write scene * view_dispatcher_remove_view subroutine * generic pause/resume os methods * fix furi_assert usage * key store, worker * fix pointer comparsion * saved keys, saved key action scenes * key delete/confirm delete scenes and routines * use last input subsystem changes * fix syntax * fix new model usage in submenu * fix includes * use vibro pin * use stored key name if valid * emulate scene * random name generator * name and save readed key scenes, new icon * fix icon position * fix text scene exit * fix naming, fix text placement, new info scene * state-driven cyfral decoder * better cyfral decoder * better cyfral decoder * one wire: search command set * metakom decoder * more key types * add next scene to error scenes * universal key reader * use new key reader * syntax fix * warning fix * byte input module template * new thread and insomnia api usage * New element: slightly rounded frame * Use elements_slightly_rounded_frame in text input * Gui test app: byte input usage * Byte input module: data drawing and selection * Byte input: comment currently unused fns * remove volatile qualifier * base byte input realisation * App gui test: remove internal fns visibility * Byne input, final version * test install gcc-arm-none-eabi-10-2020-q4-major * test install gcc-arm-none-eabi-10-2020-q4-major * App iButton: byte input view managment * App iButton: add key manually scenes * App iButton: rename scenes, add popup timeout * App iButton: use new scenes, new fn for rollback to specific prevous scene. * App iButton: remove byte input view on app exit * App iButton: edit key scene * Module byte input: reduce swintch value to uint8_t * Module byte input: switch from switch-case to if, unfortunately we need compile-time constants to use with switch * Icons: new small arrows * Module byte input: new arrangement of elements * OneWire slave lib: fix deattach sequence * App iButton: pulse sequencer * App iButton: add more keys to store * App iButton: split key worker to separate read/write/emulate entitys * App iButton: use new read/emulate entities * fix callback pointer saving * App iButton: use KeyReader error enum instead of KeyWorker error list handling * App iButton: do not use insomnia fns in pulse sequencer * App iButton: use KeyReader error enum in read scene * OneWire slave lib: more READ ROM command variants, call callback only if positive result * GPIO resources: add external gpio * App SD/NFC: removed application * App iButton-test: update to new light api * App iButton: update to new light-api * Outdated apps: add api-light-usage * Gpio: update SD card CS pin settings * API-power: added fns to disable/enable external 3v3 dc-dc * API-gpio: separated SD card detect routines * Resources: removed sd cs pin * SD card: low level init now resets card power supply * App SD-filesystem: use new card detect fns * SD card: fix low level init headers * SD card: more realilable low level init, power reset, exit from command read cycle conditionally * App SD-filesystem: led notifiers, init cycling * SD card: backport to F4 * Api PWM: add c++ guards * App iButton: yellow blink in emulate scene, vibro on * App iButton: one wire keys command set * App iButton: successful write scene * App iButton: key writer * App iButton: syntax fix * App iButton: notify write success * App iButton: fix double scene change * SD card: handle eject in init sequence * SD card: api to set level on detect gpio * SPI: api to set state on bus pins * SD card: set low state on bus pins while power reset * File select: init * File select: fix input consuming * SD Card: fixed dir open api error * SD-card: replace strncpy by strlcpy. Fix buffer overflow error. * API HAL OS: replace CMP based ticks with ARR based one, hard reset lptimer on reconfiguration. * GUI: More stack size for (temporary, wee need to implement sd card api in separate thread) * GUI: File select module. * App iButton-test: remove obsolete app Co-authored-by: rusdacent <rusdacentx0x08@gmail.com> Co-authored-by: coreglitch <mail@s3f.ru> Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
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void OneWireMaster::reset_search() {
// reset the search state
last_discrepancy = 0;
last_device_flag = false;
last_family_discrepancy = 0;
for(int i = 7;; i--) {
saved_rom[i] = 0;
if(i == 0) break;
}
}
void OneWireMaster::target_search(uint8_t family_code) {
// set the search state to find SearchFamily type devices
saved_rom[0] = family_code;
for(uint8_t i = 1; i < 8; i++) saved_rom[i] = 0;
last_discrepancy = 64;
last_family_discrepancy = 0;
last_device_flag = false;
}
uint8_t OneWireMaster::search(uint8_t* newAddr, bool search_mode) {
uint8_t id_bit_number;
uint8_t last_zero, rom_byte_number, search_result;
uint8_t id_bit, cmp_id_bit;
unsigned char rom_byte_mask, search_direction;
// initialize for search
id_bit_number = 1;
last_zero = 0;
rom_byte_number = 0;
rom_byte_mask = 1;
search_result = 0;
// if the last call was not the last one
if(!last_device_flag) {
// 1-Wire reset
if(!reset()) {
// reset the search
last_discrepancy = 0;
last_device_flag = false;
last_family_discrepancy = 0;
return false;
}
// issue the search command
if(search_mode == true) {
write(0xF0); // NORMAL SEARCH
} else {
write(0xEC); // CONDITIONAL SEARCH
}
// loop to do the search
do {
// read a bit and its complement
id_bit = read_bit();
cmp_id_bit = read_bit();
// check for no devices on 1-wire
if((id_bit == 1) && (cmp_id_bit == 1))
break;
else {
// all devices coupled have 0 or 1
if(id_bit != cmp_id_bit)
search_direction = id_bit; // bit write value for search
else {
// if this discrepancy if before the Last Discrepancy
// on a previous next then pick the same as last time
if(id_bit_number < last_discrepancy)
search_direction = ((saved_rom[rom_byte_number] & rom_byte_mask) > 0);
else
// if equal to last pick 1, if not then pick 0
search_direction = (id_bit_number == last_discrepancy);
// if 0 was picked then record its position in LastZero
if(search_direction == 0) {
last_zero = id_bit_number;
// check for Last discrepancy in family
if(last_zero < 9) last_family_discrepancy = last_zero;
}
}
// set or clear the bit in the ROM byte rom_byte_number
// with mask rom_byte_mask
if(search_direction == 1)
saved_rom[rom_byte_number] |= rom_byte_mask;
else
saved_rom[rom_byte_number] &= ~rom_byte_mask;
// serial number search direction write bit
write_bit(search_direction);
// increment the byte counter id_bit_number
// and shift the mask rom_byte_mask
id_bit_number++;
rom_byte_mask <<= 1;
// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
if(rom_byte_mask == 0) {
rom_byte_number++;
rom_byte_mask = 1;
}
}
} while(rom_byte_number < 8); // loop until through all ROM bytes 0-7
// if the search was successful then
if(!(id_bit_number < 65)) {
// search successful so set last_Discrepancy, last_device_flag, search_result
last_discrepancy = last_zero;
// check for last device
if(last_discrepancy == 0) last_device_flag = true;
search_result = true;
}
}
// if no device found then reset counters so next 'search' will be like a first
if(!search_result || !saved_rom[0]) {
last_discrepancy = 0;
last_device_flag = false;
last_family_discrepancy = 0;
search_result = false;
} else {
for(int i = 0; i < 8; i++) newAddr[i] = saved_rom[i];
}
return search_result;
}
bool OneWireMaster::reset(void) {
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uint8_t r;
uint8_t retries = 125;
// wait until the gpio is high
hal_gpio_write(gpio, true);
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do {
if(--retries == 0) return 0;
delay_us(2);
} while(!hal_gpio_read(gpio));
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// pre delay
delay_us(OneWireTiming::RESET_DELAY_PRE);
// drive low
hal_gpio_write(gpio, false);
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delay_us(OneWireTiming::RESET_DRIVE);
// release
hal_gpio_write(gpio, true);
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delay_us(OneWireTiming::RESET_RELEASE);
// read and post delay
r = !hal_gpio_read(gpio);
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delay_us(OneWireTiming::RESET_DELAY_POST);
return r;
}
bool OneWireMaster::read_bit(void) {
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bool result;
// drive low
hal_gpio_write(gpio, false);
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delay_us(OneWireTiming::READ_DRIVE);
// release
hal_gpio_write(gpio, true);
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delay_us(OneWireTiming::READ_RELEASE);
// read and post delay
result = hal_gpio_read(gpio);
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delay_us(OneWireTiming::READ_DELAY_POST);
return result;
}
void OneWireMaster::write_bit(bool value) {
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if(value) {
// drive low
hal_gpio_write(gpio, false);
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delay_us(OneWireTiming::WRITE_1_DRIVE);
// release
hal_gpio_write(gpio, true);
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delay_us(OneWireTiming::WRITE_1_RELEASE);
} else {
// drive low
hal_gpio_write(gpio, false);
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delay_us(OneWireTiming::WRITE_0_DRIVE);
// release
hal_gpio_write(gpio, true);
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delay_us(OneWireTiming::WRITE_0_RELEASE);
}
}
uint8_t OneWireMaster::read(void) {
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uint8_t result = 0;
for(uint8_t bitMask = 0x01; bitMask; bitMask <<= 1) {
if(read_bit()) {
result |= bitMask;
}
}
return result;
}
void OneWireMaster::read_bytes(uint8_t* buffer, uint16_t count) {
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for(uint16_t i = 0; i < count; i++) {
buffer[i] = read();
}
}
void OneWireMaster::write(uint8_t value) {
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uint8_t bitMask;
for(bitMask = 0x01; bitMask; bitMask <<= 1) {
write_bit((bitMask & value) ? 1 : 0);
}
}
void OneWireMaster::skip(void) {
write(0xCC);
}