diff options
Diffstat (limited to 'examples/device/cdc_uac2/src/uac2_app.c')
| -rw-r--r-- | examples/device/cdc_uac2/src/uac2_app.c | 51 |
1 files changed, 22 insertions, 29 deletions
diff --git a/examples/device/cdc_uac2/src/uac2_app.c b/examples/device/cdc_uac2/src/uac2_app.c index 70b0949a9..7d5da5ed0 100644 --- a/examples/device/cdc_uac2/src/uac2_app.c +++ b/examples/device/cdc_uac2/src/uac2_app.c @@ -49,17 +49,36 @@ uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; int8_t mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1]; // +1 for master channel 0 int16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1]; // +1 for master channel 0 -// Buffer for microphone data -int32_t mic_buf[CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ / 4]; // Buffer for speaker data int32_t spk_buf[CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ / 4]; // Speaker data size received in the last frame -int spk_data_size; +uint16_t spk_data_size; // Resolution per format const uint8_t resolutions_per_format[CFG_TUD_AUDIO_FUNC_1_N_FORMATS] = {CFG_TUD_AUDIO_FUNC_1_FORMAT_1_RESOLUTION_RX}; // Current resolution, update on format change uint8_t current_resolution; +//--------------------------------------------------------------------+ +// AUDIO Task +//--------------------------------------------------------------------+ + +// This task simulates an audio transfer callback, one frame is sent/received every 1ms. +// In a real application, this would be replaced with actual I2S send/receive callback. +void audio_task(void) { + static uint32_t start_ms = 0; + uint32_t curr_ms = board_millis(); + if (start_ms == curr_ms) return;// not enough time + start_ms = curr_ms; + // When new data arrived, copy data from speaker buffer, to microphone buffer + // and send it over + // Only support speaker & headphone both have the same resolution + // If one is 16bit another is 24bit be care of LOUD noise ! + spk_data_size = tud_audio_read(spk_buf, sizeof(spk_buf)); + if (spk_data_size) { + tud_audio_write((uint8_t *) spk_buf, spk_data_size); + } +} + // Helper for clock get requests static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t const *request) { @@ -265,8 +284,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque blink_interval_ms = BLINK_STREAMING; } - // Clear buffer when streaming format is changed - spk_data_size = 0; if(alt != 0) { current_resolution = resolutions_per_format[alt-1]; @@ -275,30 +292,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque return true; } -bool tud_audio_rx_done_pre_read_cb(uint8_t rhport, uint16_t n_bytes_received, uint8_t func_id, uint8_t ep_out, uint8_t cur_alt_setting) -{ - (void)rhport; - (void)func_id; - (void)ep_out; - (void)cur_alt_setting; - - spk_data_size = tud_audio_read(spk_buf, n_bytes_received); - tud_audio_write(spk_buf, n_bytes_received); - - return true; -} - -bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting) -{ - (void)rhport; - (void)itf; - (void)ep_in; - (void)cur_alt_setting; - - // This callback could be used to fill microphone data separately - return true; -} - //--------------------------------------------------------------------+ // BLINKING TASK //--------------------------------------------------------------------+ |