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i2s: add notes for the read task of i2s basic examples

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laokaiyao
2022-09-05 19:10:42 +08:00
parent 0f0baa5bb4
commit d836d8cf35
4 changed files with 10 additions and 1 deletions
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2
components/driver/i2s/i2s_common.c
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@ -242,7 +242,7 @@ static esp_err_t i2s_register_channel(i2s_controller_t *i2s_obj, i2s_dir_t dir,
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
i2s_chan_handle_t new_chan = (i2s_chan_handle_t)heap_caps_calloc(1, sizeof(struct i2s_channel_t), I2S_MEM_ALLOC_CAPS); i2s_chan_handle_t new_chan = (i2s_chan_handle_t)heap_caps_calloc(1, sizeof(struct i2s_channel_obj_t), I2S_MEM_ALLOC_CAPS);
ESP_RETURN_ON_FALSE(new_chan, ESP_ERR_NO_MEM, TAG, "No memory for new channel"); ESP_RETURN_ON_FALSE(new_chan, ESP_ERR_NO_MEM, TAG, "No memory for new channel");
new_chan->mode = I2S_COMM_MODE_NONE; new_chan->mode = I2S_COMM_MODE_NONE;
new_chan->role = I2S_ROLE_MASTER; // Set default role to master new_chan->role = I2S_ROLE_MASTER; // Set default role to master

3
examples/peripherals/i2s/i2s_basic/i2s_pdm/main/i2s_pdm_rx.c
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@ -60,6 +60,9 @@ void i2s_example_pdm_rx_task(void *args)
i2s_chan_handle_t rx_chan = i2s_example_init_pdm_rx(); i2s_chan_handle_t rx_chan = i2s_example_init_pdm_rx();
size_t r_bytes = 0; size_t r_bytes = 0;
/* ATTENTION: The print and delay in the read task only for monitoring the data by human,
* Normally there shouldn't be any delays to ensure a short polling time,
* Otherwise the dma buffer will overflow and lead to the data lost */
while (1) { while (1) {
/* Read i2s data */ /* Read i2s data */
if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) { if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) {

3
examples/peripherals/i2s/i2s_basic/i2s_std/main/i2s_std_example_main.c
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@ -53,6 +53,9 @@ static void i2s_example_read_task(void *args)
uint8_t *r_buf = (uint8_t *)calloc(1, EXAMPLE_BUFF_SIZE); uint8_t *r_buf = (uint8_t *)calloc(1, EXAMPLE_BUFF_SIZE);
assert(r_buf); // Check if r_buf allocation success assert(r_buf); // Check if r_buf allocation success
size_t r_bytes = 0; size_t r_bytes = 0;
/* ATTENTION: The print and delay in the read task only for monitoring the data by human,
* Normally there shouldn't be any delays to ensure a short polling time,
* Otherwise the dma buffer will overflow and lead to the data lost */
while (1) { while (1) {
/* Read i2s data */ /* Read i2s data */
if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) { if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) {

3
examples/peripherals/i2s/i2s_basic/i2s_tdm/main/i2s_tdm_example_main.c
View File

@ -38,6 +38,9 @@ static void i2s_example_read_task(void *args)
uint8_t *r_buf = (uint8_t *)calloc(1, EXAMPLE_BUFF_SIZE); uint8_t *r_buf = (uint8_t *)calloc(1, EXAMPLE_BUFF_SIZE);
assert(r_buf); // Check if r_buf allocation success assert(r_buf); // Check if r_buf allocation success
size_t r_bytes = 0; size_t r_bytes = 0;
/* ATTENTION: The print and delay in the read task only for monitoring the data by human,
* Normally there shouldn't be any delays to ensure a short polling time,
* Otherwise the dma buffer will overflow and lead to the data lost */
while (1) { while (1) {
/* Read i2s data */ /* Read i2s data */
if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) { if (i2s_channel_read(rx_chan, r_buf, EXAMPLE_BUFF_SIZE, &r_bytes, 1000) == ESP_OK) {