diff options
Diffstat (limited to 'examples/device')
| -rw-r--r-- | examples/device/audio_4_channel_mic/src/main.c | 30 | ||||
| -rw-r--r-- | examples/device/audio_4_channel_mic/src/tusb_config.h | 4 |
2 files changed, 19 insertions, 15 deletions
diff --git a/examples/device/audio_4_channel_mic/src/main.c b/examples/device/audio_4_channel_mic/src/main.c index 9c37315c8..1de4f9dac 100644 --- a/examples/device/audio_4_channel_mic/src/main.c +++ b/examples/device/audio_4_channel_mic/src/main.c @@ -71,10 +71,10 @@ audio_control_range_4_n_t(1) sampleFreqRng; // Sample frequency range stat #if CFG_TUD_AUDIO_ENABLE_ENCODING // Audio test data, each buffer contains 2 channels, buffer[0] for CH0-1, buffer[1] for CH1-2 -uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO][CFG_TUD_AUDIO_FUNC_1_TX_SUPP_SW_FIFO_SZ/2]; // Ensure half word aligned +uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO][CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX*CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE/1000/CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO]; #else // Audio test data, 4 channels muxed together, buffer[0] for CH0, buffer[1] for CH1, buffer[2] for CH2, buffer[3] for CH3 -uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_EP_SZ_IN]; // Ensure half word aligned +uint16_t i2s_dummy_buffer[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX*CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE/1000]; #endif void led_blinking_task(void); @@ -185,8 +185,21 @@ void tud_resume_cb(void) void audio_task(void) { - // Yet to be filled - e.g. put meas data into TX FIFOs etc. - // asm("nop"); + // Yet to be filled - e.g. read audio from I2S buffer. + // Here we simulate a I2S receive callback every 1ms. + 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; +#if CFG_TUD_AUDIO_ENABLE_ENCODING + // Write I2S buffer into FIFO + for (uint8_t cnt=0; cnt < 2; cnt++) + { + tud_audio_write_support_ff(cnt, i2s_dummy_buffer[cnt], AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX); + } +#else + tud_audio_write(i2s_dummy_buffer, AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX); +#endif } //--------------------------------------------------------------------+ @@ -453,15 +466,6 @@ bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, u // tud_audio_write_support_ff(channel, data, samples * N_BYTES_PER_SAMPLE * N_CHANNEL_PER_FIFO); // } -#if CFG_TUD_AUDIO_ENABLE_ENCODING - // Write I2S buffer into FIFO - for (uint8_t cnt=0; cnt < 2; cnt++) - { - tud_audio_write_support_ff(cnt, i2s_dummy_buffer[cnt], AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX); - } -#else - tud_audio_write(i2s_dummy_buffer, AUDIO_SAMPLE_RATE/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX); -#endif return true; } diff --git a/examples/device/audio_4_channel_mic/src/tusb_config.h b/examples/device/audio_4_channel_mic/src/tusb_config.h index cf44918e2..46484f847 100644 --- a/examples/device/audio_4_channel_mic/src/tusb_config.h +++ b/examples/device/audio_4_channel_mic/src/tusb_config.h @@ -126,12 +126,12 @@ extern "C" { #define CFG_TUD_AUDIO_ENABLE_TYPE_I_ENCODING 1 #define CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX 2 // One I2S stream contains two channels, each stream is saved within one support FIFO - this value is currently fixed, the driver does not support a changing value #define CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO (CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX / CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX) -#define CFG_TUD_AUDIO_FUNC_1_TX_SUPP_SW_FIFO_SZ 4 * (CFG_TUD_AUDIO_EP_SZ_IN / CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO) // Minimum 4*EP size is needed for flow control +#define CFG_TUD_AUDIO_FUNC_1_TX_SUPP_SW_FIFO_SZ (TUD_OPT_HIGH_SPEED ? 32 : 4) * (CFG_TUD_AUDIO_EP_SZ_IN / CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO) // Example write FIFO every 1ms, so it should be 8 times larger for HS device #else #define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX CFG_TUD_AUDIO_EP_SZ_IN -#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ 4 * CFG_TUD_AUDIO_EP_SZ_IN // Minimum 4*EP size is needed for flow control +#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ (TUD_OPT_HIGH_SPEED ? 32 : 4) * CFG_TUD_AUDIO_EP_SZ_IN // Example write FIFO every 1ms, so it should be 8 times larger for HS device #endif |