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107 lines
3.5 KiB
107 lines
3.5 KiB
/* Hello World Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdio.h>
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#include "sdkconfig.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_system.h"
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#include "esp_spi_flash.h"
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#include "driver/ledc.h"
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#include "irblast.h"
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static portMUX_TYPE mux_irblast;
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#define CMDLEN 4
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static const uint8_t COMMANDS[][CMDLEN] = {
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[IRBLAST_ONOFF] = {0b10000000, 0b01111111, 0b00000000, 0b11111111},
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[IRBLAST_DAYNIGHT] = {0b10000000, 0b01111111, 0b10000000, 0b01111111},
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[IRBLAST_SPEED1] = {0b10000000, 0b01111111, 0b10101000, 0b01010111},
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[IRBLAST_SPEED2] = {0b10000000, 0b01111111, 0b01101000, 0b10010111},
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[IRBLAST_SPEED3] = {0b10000000, 0b01111111, 0b00101000, 0b11010111},
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[IRBLAST_MODE1] = {0b10000000, 0b01111111, 0b00011000, 0b11100111},
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[IRBLAST_MODE2] = {0b10000000, 0b01111111, 0b10011000, 0b01100111},
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[IRBLAST_MODE3] = {0b10000000, 0b01111111, 0b00001000, 0b11110111},
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[IRBLAST_MODE4] = {0b10000000, 0b01111111, 0b10001000, 0b01110111},
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[IRBLAST_HUM1] = {0b10000000, 0b01111111, 0b00010000, 0b11101111},
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[IRBLAST_HUM2] = {0b10000000, 0b01111111, 0b01010000, 0b10101111},
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[IRBLAST_HUM3] = {0b10000000, 0b01111111, 0b10010000, 0b01101111},
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};
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void irblast_setup() {
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vPortCPUInitializeMutex(&mux_irblast);
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ledc_timer_config_t ledc_timer = {
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.duty_resolution = LEDC_TIMER_8_BIT, // resolution of PWM duty
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.freq_hz = 38500, // frequency of PWM signal
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.speed_mode = LEDC_HIGH_SPEED_MODE, // timer mode
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.timer_num = LEDC_TIMER_0, // timer index
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.clk_cfg = LEDC_AUTO_CLK, // Auto select the source clock
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};
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// Set configuration of timer0 for high speed channels
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ledc_timer_config(&ledc_timer);
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ledc_channel_config_t chan = {
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.channel = LEDC_CHANNEL_0,
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.duty = 127,
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.gpio_num = CONFIG_PIN_IRLED,
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.speed_mode = LEDC_HIGH_SPEED_MODE,
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.hpoint = 0,
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.timer_sel = LEDC_TIMER_0
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};
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ledc_channel_config(&chan);
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}
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static inline void pwm_on() {
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 127);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
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}
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static inline void pwm_off() {
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ledc_stop(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0);
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}
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void irblast_send(enum irblast_cmd cmd) {
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const uint8_t *bytes = COMMANDS[cmd];
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portENTER_CRITICAL(&mux_irblast);
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// Preamble
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pwm_on();
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ets_delay_us(9000);
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pwm_off();
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ets_delay_us(4500);
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for (int i = 0; i < CMDLEN; i++) {
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uint8_t byte = bytes[i];
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for (int j = 0; j < 8; j++) {
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if ((byte & 0x80) == 0) {
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pwm_on();
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ets_delay_us(588);
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pwm_off();
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ets_delay_us(540);
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} else {
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pwm_on();
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ets_delay_us(590);
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pwm_off();
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ets_delay_us(1672);
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}
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byte <<= 1;
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}
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}
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// one "1" at the end, for some reason
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pwm_on();
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ets_delay_us(600);
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pwm_off();
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portEXIT_CRITICAL(&mux_irblast);
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vTaskDelay(pdMS_TO_TICKS(1000));
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}
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