46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
|
#include "flipper.h"
|
|||
|
|
#include "irda_nec.h"
|
|||
|
|
#include "irda_protocols.h"
|
|||
|
|
|
|||
|
|
void ir_nec_preambula(void) {
|
|||
|
|
// 9ms carrier + 4.5ms pause
|
|||
|
|
pwm_set(NEC_DUTY_CYCLE, NEC_CARRIER_FREQUENCY, &htim2, TIM_CHANNEL_4);
|
|||
|
|
delay_us(9000);
|
|||
|
|
pwm_stop(&htim2, TIM_CHANNEL_4);
|
|||
|
|
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
|
|||
|
|
pwm_set(NEC_DUTY_CYCLE, NEC_CARRIER_FREQUENCY, &htim2, TIM_CHANNEL_4);
|
|||
|
|
delay_us(562.5);
|
|||
|
|
pwm_stop(&htim2, TIM_CHANNEL_4);
|
|||
|
|
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(uint8_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 don’t 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] = {addr, ~(uint8_t)addr, ~(uint8_t)data, data};
|
|||
|
|
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);
|
|||
|
|
}
|