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Extend example s.t. a saw tooth is sent.

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This commit is contained in:
Reinhard Panhuber 2020-10-09 20:15:57 +02:00
parent 032e84c9be
commit 63f18cef19
3 changed files with 51 additions and 5 deletions
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44
examples/device/audio_test/src/main.c
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@ -58,6 +58,10 @@ uint8_t clkValid;
audio_control_range_2_n_t(1) volumeRng[CFG_TUD_AUDIO_N_CHANNELS_TX+1]; // Volume range state
audio_control_range_4_n_t(1) sampleFreqRng; // Sample frequency range state
// Audio test data
uint8_t test_buffer_audio[CFG_TUD_AUDIO_TX_FIFO_SIZE];
uint16_t startVal = 0;
void led_blinking_task(void);
void audio_task(void);
@ -364,6 +368,46 @@ bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const *
return false; // Yet not implemented
}
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;
tud_audio_write (test_buffer_audio, CFG_TUD_AUDIO_TX_FIFO_SIZE);
return true;
}
bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting)
{
(void) rhport;
(void) rhport;
(void) itf;
(void) ep_in;
(void) cur_alt_setting;
uint8_t * pBuffer = test_buffer_audio;
for (size_t cnt = 0; cnt < CFG_TUD_AUDIO_TX_FIFO_SIZE/2; cnt++)
{
*(uint16_t *)pBuffer = startVal++;
pBuffer += 2;
}
return true;
}
bool tud_audio_set_itf_close_EP_cb(uint8_t rhport, tusb_control_request_t const * p_request)
{
(void) rhport;
(void) p_request;
startVal = 0;
return true;
}
//--------------------------------------------------------------------+
// BLINKING TASK
//--------------------------------------------------------------------+

10
examples/device/audio_test/src/tusb_config.h
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@ -93,18 +93,20 @@ extern "C" {
// Audio format type I specifications
#define CFG_TUD_AUDIO_FORMAT_TYPE_I_TX AUDIO_DATA_FORMAT_TYPE_I_PCM
#define CFG_TUD_AUDIO_N_CHANNELS_TX 1
#define CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX 3
#define CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX 2
// EP and buffer size - for isochronous EP´s, the buffer and EP size are equal (different sizes would not make sense)
#define CFG_TUD_AUDIO_EPSIZE_IN 45*CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX*CFG_TUD_AUDIO_N_CHANNELS_TX // 45 Samples (44.1 kHz) x 3 Bytes/Sample x 1 Channels
#define CFG_TUD_AUDIO_TX_FIFO_SIZE 45*4 // 45 Samples (44.1 kHz) x 4 Bytes/Sample (1 word)
#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
#define CFG_TUD_AUDIO_TX_FIFO_SIZE 48*2 // 48 Samples (48 kHz) x 2 Bytes/Sample (1/2 word)
// 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)
#define CFG_TUD_AUDIO_N_AS_INT 1
#define CFG_TUD_AUDIO_N_AS_INT 1
// Size of control request buffer
#define CFG_TUD_AUDIO_CTRL_BUF_SIZE 64
#define CFG_TUSB_DEBUG 0
#ifdef __cplusplus
}
#endif

2
examples/device/audio_test/src/usb_descriptors.c
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@ -102,7 +102,7 @@ uint8_t const desc_configuration[] =
TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
// Interface number, string index, EP Out & EP In address, EP size
TUD_AUDIO_MIC_DESCRIPTOR(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_stridx*/ 0, /*_nBytesPerSample*/ 3, /*_nBitsUsedPerSample*/ 24, /*_epin*/ 0x80 | EPNUM_AUDIO, /*_epsize*/ 45*3)
TUD_AUDIO_MIC_DESCRIPTOR(/*_itfnum*/ ITF_NUM_AUDIO_CONTROL, /*_stridx*/ 0, /*_nBytesPerSample*/ 3, /*_nBitsUsedPerSample*/ 24, /*_epin*/ 0x80 | EPNUM_AUDIO, /*_epsize*/ 48*4)
};
// Invoked when received GET CONFIGURATION DESCRIPTOR