Implement audio PCM type I enc./decoding acc. to 2.3.1.5 Audio Streams
Extending capabilities of support FIFOs Removing copy from to FIFO Adjusting audio examples Remove peek/read into other FIFO
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@@ -73,12 +73,12 @@ int main(void)
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tusb_init();
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// Init values
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sampFreq = 48000;
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sampFreq = AUDIO_SAMPLE_RATE;
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clkValid = 1;
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sampleFreqRng.wNumSubRanges = 1;
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sampleFreqRng.subrange[0].bMin = 48000;
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sampleFreqRng.subrange[0].bMax = 48000;
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sampleFreqRng.subrange[0].bMin = AUDIO_SAMPLE_RATE;
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sampleFreqRng.subrange[0].bMax = AUDIO_SAMPLE_RATE;
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sampleFreqRng.subrange[0].bRes = 0;
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while (1)
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@@ -91,9 +91,12 @@ extern "C" {
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// AUDIO CLASS DRIVER CONFIGURATION
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//--------------------------------------------------------------------
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#ifndef AUDIO_SAMPLE_RATE
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#define AUDIO_SAMPLE_RATE 48000
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#endif
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// Audio format type
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#define CFG_TUD_AUDIO_FORMAT_TYPE_TX AUDIO_FORMAT_TYPE_I
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#define CFG_TUD_AUDIO_FORMAT_TYPE_RX AUDIO_FORMAT_TYPE_UNDEFINED
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// Audio format type I specifications
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#define CFG_TUD_AUDIO_FORMAT_TYPE_I_TX AUDIO_DATA_FORMAT_TYPE_I_PCM
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@@ -101,8 +104,8 @@ extern "C" {
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#define CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX 2
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// EP and buffer size - for isochronous EP´s, the buffer and EP size are equal (different sizes would not make sense)
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#define CFG_TUD_AUDIO_EPSIZE_IN 48*CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX*CFG_TUD_AUDIO_N_CHANNELS_TX // 48 Samples (48 kHz) x 2 Bytes/Sample x 1 Channels
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#define CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE CFG_TUD_AUDIO_EPSIZE_IN + 1 // Just for safety one sample more space
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#define CFG_TUD_AUDIO_EPSIZE_IN 48 * CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_N_CHANNELS_TX // ceil(f_s/1000) * CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_N_CHANNELS_TX
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#define CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE CFG_TUD_AUDIO_EPSIZE_IN + CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX * CFG_TUD_AUDIO_N_CHANNELS_TX // Just for safety one sample more space
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// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
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#define CFG_TUD_AUDIO_N_AS_INT 1
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