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esp32: setup i2s config and pins based on sink/source state

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This commit is contained in:
Matthias Ringwald 2021-12-28 00:01:26 +01:00
parent 421550a67c
commit e9b96b79ca
1 changed files with 32 additions and 23 deletions
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55
port/esp32/components/btstack/btstack_audio_esp32.c
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@ -63,12 +63,13 @@
#define IIC_CLK (GPIO_NUM_23)
#endif
#define BTSTACK_AUDIO_I2S_NUM (I2S_NUM_0)
#define DRIVER_POLL_INTERVAL_MS 5
#define DMA_BUFFER_COUNT 3
#define DMA_BUFFER_SAMPLES 300
#define BYTES_PER_SAMPLE_STEREO 4
static int i2s_num = I2S_NUM_0;
typedef enum {
BTSTACK_AUDIO_ESP32_OFF = 0,
@ -128,7 +129,7 @@ static void btstack_audio_esp32_sink_fill_buffer(void){
} else {
memset(buffer, 0, sizeof(buffer));
}
i2s_write(i2s_num, buffer, DMA_BUFFER_SAMPLES * btstack_audio_esp32_sink_bytes_per_sample, &bytes_written, portMAX_DELAY);
i2s_write(BTSTACK_AUDIO_I2S_NUM, buffer, DMA_BUFFER_SAMPLES * btstack_audio_esp32_sink_bytes_per_sample, &bytes_written, portMAX_DELAY);
}
static void btstack_audio_esp32_driver_timer_handler(btstack_timer_source_t * ts){
@ -150,12 +151,30 @@ static void btstack_audio_esp32_init(void){
// de-register driver if already installed
if (btstack_audio_esp32_i2s_installed){
i2s_driver_uninstall(i2s_num);
i2s_driver_uninstall(BTSTACK_AUDIO_I2S_NUM);
}
// set i2s mode and pins based on sink / source state
i2s_mode_t i2s_mode = I2S_MODE_MASTER;
int i2s_data_out_pin = I2S_PIN_NO_CHANGE;
int i2s_data_in_pin = I2S_PIN_NO_CHANGE;
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
int i2s_bck_io_pin = GPIO_NUM_5;
#else
int i2s_bck_io_pin = 26;
#endif
if (btstack_audio_esp32_sink_state != BTSTACK_AUDIO_ESP32_OFF){
i2s_mode |= I2S_MODE_TX; // playback
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
i2s_data_out_pin = GPIO_NUM_26;
#else
i2s_data_out_pin = 22;
#endif
}
i2s_config_t config =
{
.mode = I2S_MODE_MASTER | I2S_MODE_TX, // Playback only
.mode = i2s_mode,
.sample_rate = btstack_audio_esp32_sink_samplerate,
.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
@ -165,31 +184,21 @@ static void btstack_audio_esp32_init(void){
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1
};
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
i2s_pin_config_t pins =
{
.bck_io_num = GPIO_NUM_5,
.bck_io_num = i2s_bck_io_pin,
.ws_io_num = GPIO_NUM_25,
.data_out_num = GPIO_NUM_26,
.data_in_num = GPIO_NUM_35
.data_out_num = i2s_data_out_pin,
.data_in_num = i2s_data_in_pin
};
#else
i2s_pin_config_t pins =
{
.bck_io_num = 26,
.ws_io_num = 25,
.data_out_num = 22,
.data_in_num = I2S_PIN_NO_CHANGE
};
#endif
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
btstack_audio_esp32_set_i2s0_mclk();
#endif
i2s_driver_install(i2s_num, &config, DMA_BUFFER_COUNT, &btstack_audio_esp32_i2s_event_queue);
i2s_set_pin(i2s_num, &pins);
i2s_zero_dma_buffer(i2s_num);
i2s_driver_install(BTSTACK_AUDIO_I2S_NUM, &config, DMA_BUFFER_COUNT, &btstack_audio_esp32_i2s_event_queue);
i2s_set_pin(BTSTACK_AUDIO_I2S_NUM, &pins);
i2s_zero_dma_buffer(BTSTACK_AUDIO_I2S_NUM);
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
btstack_audio_esp32_es8388_init();
@ -237,7 +246,7 @@ static void btstack_audio_esp32_sink_start_stream(void){
}
// start i2s
i2s_start(i2s_num);
i2s_start(BTSTACK_AUDIO_I2S_NUM);
// start timer
btstack_run_loop_set_timer_handler(&btstack_audio_esp32_driver_timer, &btstack_audio_esp32_driver_timer_handler);
@ -256,7 +265,7 @@ static void btstack_audio_esp32_sink_stop_stream(void){
btstack_run_loop_remove_timer(&btstack_audio_esp32_driver_timer);
// stop i2s
i2s_stop(i2s_num);
i2s_stop(BTSTACK_AUDIO_I2S_NUM);
// state
btstack_audio_esp32_sink_state = BTSTACK_AUDIO_ESP32_INITIALIZED;
@ -271,7 +280,7 @@ static void btstack_audio_esp32_sink_close(void){
btstack_audio_esp32_sink_state = BTSTACK_AUDIO_ESP32_OFF;
// uninstall driver
i2s_driver_uninstall(i2s_num);
i2s_driver_uninstall(BTSTACK_AUDIO_I2S_NUM);
btstack_audio_esp32_i2s_installed = false;
}