Init

2026-05-08 14:56:29 +02:00
commit e4a5ccb043
39 changed files with 2481 additions and 0 deletions
@@ -0,0 +1,89 @@
+#include "es8311.h"
+
+#include "drivers/i2s.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "driver/i2s_std.h"
+
+#include "i2c.h"
+#include "pins.h"
+
+void es8311_write(uint8_t reg, uint8_t val) {
+  i2c_write_reg(ES8311_I2C_ADDR, reg, val);
+}
+
+void es8311_set_dac_volume(uint8_t vol) {
+  es8311_write(ES8311_DAC_VOL_L, vol);
+  es8311_write(ES8311_DAC_VOL_R, vol);
+}
+
+void es8311_set_adc_volume(uint8_t vol) { es8311_write(ES8311_ADC_VOL, vol); }
+
+void es8311_init(void) {
+  es8311_write(ES8311_RESET, ES8311_RESET_CMD);
+
+  vTaskDelay(pdMS_TO_TICKS(20));
+
+  // enable ADC + DAC
+  es8311_write(ES8311_PWR_UP_DOWN, ES8311_PWR_DAC_EN | ES8311_PWR_ADC_EN);
+
+  es8311_write(ES8311_PWR_ANALOG, ES8311_ALL_ON);
+
+  // I2S 16-bit
+  es8311_write(ES8311_SER_FMT, ES8311_FMT_I2S | ES8311_WORD_LEN_16);
+
+  // ADC config
+  es8311_write(ES8311_ADC_CTRL1, 0x44);
+
+  es8311_write(ES8311_ADC_CTRL2, 0x0C);
+
+  // DAC config
+  es8311_write(ES8311_DAC_CTRL1, 0x04);
+
+  es8311_write(ES8311_DAC_CTRL2, 0x0C);
+
+  es8311_set_dac_volume(0xBF);
+  es8311_set_adc_volume(0x88);
+
+  es8311_write(ES8311_SPK_CTRL, 0xFF);
+
+  audio_i2s_init();
+}
+
+int audio_write(const int16_t *samples, size_t count) {
+  size_t written;
+
+  esp_err_t r = i2s_channel_write(i2s_tx, samples, count * sizeof(int16_t),
+                                  &written, portMAX_DELAY);
+
+  if (r != ESP_OK)
+    return -1;
+
+  return written / sizeof(int16_t);
+}
+
+int audio_read(int16_t *samples, size_t count) {
+  size_t read;
+
+  esp_err_t r = i2s_channel_read(i2s_rx, samples, count * sizeof(int16_t),
+                                 &read, portMAX_DELAY);
+
+  if (r != ESP_OK)
+    return -1;
+
+  return read / sizeof(int16_t);
+}
+
+void audio_beep(void) {
+  static int16_t buf[4410];
+
+  for (int i = 0; i < 4410; i++) {
+
+    int phase = (i / 20) & 1;
+
+    buf[i] = phase ? 12000 : -12000;
+  }
+
+  audio_write(buf, 4410);
+}