unleashed-firmware/applications/irda/irda_nec.c
あく 68a3f6b4b7
[FL-873] Add F5 target, lp5562 driver and api-hal-light (#347)
* Add F5 target, lp5562 driver and api-hal-light. Update api-usage, switch to F5 by default.
* API HAL: add i2c and hardware version api. Dolphin: show hardware version.
* OTP version generator and flashing utility.
* Assets script: fix code formatting
* Backport F5 changes to F4
* F4: disable insomnia, prevent damage to BLE RX path
* F5 HAL API Light: remove magic delay to fix magic BLE
* Dolphin: HW target validation on start
* invert RSSI indication in sub-1
* API HAL: rename board to body in version api
* Gpio tester: detach and release viewport on exit

Co-authored-by: aanper <mail@s3f.ru>
2021-02-18 15:49:32 +03:00

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#include <furi.h>
#include <api-hal.h>
#include "irda_nec.h"
#include "irda_protocols.h"
void ir_nec_preambula(void) {
// 9ms carrier + 4.5ms pause
irda_pwm_set(NEC_DUTY_CYCLE, NEC_CARRIER_FREQUENCY);
delay_us(9000);
irda_pwm_stop();
delay_us(4500);
}
void ir_nec_send_bit(bool bit) {
// 0 is 562.5us carrier + 1687.5us pause
// 1 is 562.5us carrier + 562.5us pause
irda_pwm_set(NEC_DUTY_CYCLE, NEC_CARRIER_FREQUENCY);
delay_us(562.5);
irda_pwm_stop();
if(bit) {
delay_us(562.5);
} else {
delay_us(1687.5);
}
}
void ir_nec_send_byte(uint8_t data) {
for(uint8_t i = 0; i < 8; i++) {
ir_nec_send_bit((data & (1 << (i))) != 0);
}
}
void ir_nec_send(uint16_t addr, uint8_t data) {
// nec protocol is:
// preambula + addr + inverse addr + command + inverse command + bit pulse
//
// oddly enough, my analyzer (https://github.com/ukw100/IRMP) displays the reverse command
// and I dont know if this is my fault or a feature of the analyzer
// TODO: check the dictionary and check with a known remote
uint8_t nec_packet[4] = {~(uint8_t)addr, ~(uint8_t)(addr >> 8), ~(uint8_t)data, data};
osKernelLock();
__disable_irq();
ir_nec_preambula();
ir_nec_send_byte(nec_packet[0]);
ir_nec_send_byte(nec_packet[1]);
ir_nec_send_byte(nec_packet[2]);
ir_nec_send_byte(nec_packet[3]);
ir_nec_send_bit(1);
__enable_irq();
osKernelUnlock();
}