89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#include "es8311.h"
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#include "drivers/i2s.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/i2s_std.h"
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#include "i2c.h"
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#include "pins.h"
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void es8311_write(uint8_t reg, uint8_t val) {
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i2c_write_reg(ES8311_I2C_ADDR, reg, val);
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}
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void es8311_set_dac_volume(uint8_t vol) {
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es8311_write(ES8311_DAC_VOL_L, vol);
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es8311_write(ES8311_DAC_VOL_R, vol);
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}
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void es8311_set_adc_volume(uint8_t vol) { es8311_write(ES8311_ADC_VOL, vol); }
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void es8311_init(void) {
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es8311_write(ES8311_RESET, ES8311_RESET_CMD);
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vTaskDelay(pdMS_TO_TICKS(20));
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// enable ADC + DAC
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es8311_write(ES8311_PWR_UP_DOWN, ES8311_PWR_DAC_EN | ES8311_PWR_ADC_EN);
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es8311_write(ES8311_PWR_ANALOG, ES8311_ALL_ON);
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// I2S 16-bit
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es8311_write(ES8311_SER_FMT, ES8311_FMT_I2S | ES8311_WORD_LEN_16);
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// ADC config
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es8311_write(ES8311_ADC_CTRL1, 0x44);
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es8311_write(ES8311_ADC_CTRL2, 0x0C);
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// DAC config
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es8311_write(ES8311_DAC_CTRL1, 0x04);
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es8311_write(ES8311_DAC_CTRL2, 0x0C);
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es8311_set_dac_volume(0xBF);
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es8311_set_adc_volume(0x88);
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es8311_write(ES8311_SPK_CTRL, 0xFF);
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audio_i2s_init();
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}
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int audio_write(const int16_t *samples, size_t count) {
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size_t written;
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esp_err_t r = i2s_channel_write(i2s_tx, samples, count * sizeof(int16_t),
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&written, portMAX_DELAY);
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if (r != ESP_OK)
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return -1;
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return written / sizeof(int16_t);
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}
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int audio_read(int16_t *samples, size_t count) {
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size_t read;
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esp_err_t r = i2s_channel_read(i2s_rx, samples, count * sizeof(int16_t),
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&read, portMAX_DELAY);
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if (r != ESP_OK)
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return -1;
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return read / sizeof(int16_t);
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}
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void audio_beep(void) {
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static int16_t buf[4410];
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for (int i = 0; i < 4410; i++) {
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int phase = (i / 20) & 1;
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buf[i] = phase ? 12000 : -12000;
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}
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audio_write(buf, 4410);
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} |