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auto-detect DAC

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philippe44
2020-02-09 14:22:35 -08:00
parent 90d52dabaf
commit c4b0168370
7 changed files with 77 additions and 36 deletions
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19
components/squeezelite/a1s/ac101.c
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@@ -73,7 +73,6 @@ static int i2c_port;
static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
esp_err_t res;
ESP_LOGI(TAG, "Initializing AC101");
i2c_port = i2c_port_num;
// configure i2c
@@ -88,17 +87,21 @@ static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
i2c_param_config(i2c_port, &i2c_config);
i2c_driver_install(i2c_port, I2C_MODE_MASTER, false, false, false);
ESP_LOGI(TAG, "DAC using I2C sda:%u, scl:%u", i2c_config.sda_io_num, i2c_config.scl_io_num);
res = i2c_read_reg(CHIP_AUDIO_RS);
if (!res) {
ESP_LOGW(TAG, "No AC101 detected");
i2c_driver_delete(i2c_port);
return 0;
}
ESP_LOGI(TAG, "AC101 DAC using I2C sda:%u, scl:%u", i2c_config.sda_io_num, i2c_config.scl_io_num);
res = i2c_write_reg(CHIP_AUDIO_RS, 0x123);
// huh?
vTaskDelay(100 / portTICK_PERIOD_MS);
vTaskDelay(100 / portTICK_PERIOD_MS);
if (ESP_OK != res) {
ESP_LOGE(TAG, "AC101 reset failed! %d", res);
return false;
}
// enable the PLL from BCLK source
i2c_write_reg(PLL_CTRL1, BIN(0000,0001,0100,1111)); // F=1,M=1,PLL,INT=31 (medium)
i2c_write_reg(PLL_CTRL2, BIN(1000,0110,0000,0000)); // PLL, F=96,N_i=1024-96,F=0,N_f=0*0.2;