39 lines
999 B
C
39 lines
999 B
C
#include "driver/ledc.h"
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#include "pins.h"
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#define LEDC_TIMER LEDC_TIMER_0
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#define LEDC_MODE LEDC_LOW_SPEED_MODE
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#define LEDC_CHANNEL LEDC_CHANNEL_0
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#define LEDC_DUTY_RES LEDC_TIMER_8_BIT
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void ir_pwm_init() {
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ledc_timer_config_t timer = {
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.speed_mode = LEDC_MODE,
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.timer_num = LEDC_TIMER,
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.duty_resolution = LEDC_DUTY_RES,
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.freq_hz = 38000,
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.clk_cfg = LEDC_AUTO_CLK
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};
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ledc_timer_config(&timer);
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ledc_channel_config_t channel = {
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.speed_mode = LEDC_MODE,
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.channel = LEDC_CHANNEL,
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.timer_sel = LEDC_TIMER,
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.gpio_num = IR_LED,
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.duty = 0,
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.hpoint = 0
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};
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ledc_channel_config(&channel);
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}
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void ir_carrier_on() {
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// ~50% duty cycle (strong IR signal)
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ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, 128);
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ledc_update_duty(LEDC_MODE, LEDC_CHANNEL);
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}
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void ir_carrier_off() {
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ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, 0);
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ledc_update_duty(LEDC_MODE, LEDC_CHANNEL);
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} |