kopia lustrzana https://github.com/skuep/AIOC
Improvements in USB audio reliability
rodzic
a8c1b99865
commit
d5b44a96a1
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@ -122,9 +122,9 @@
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#define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX 1
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#define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX 1
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#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SZ_MAX CFG_TUD_AUDIO_EP_SZ_OUT + CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE
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#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ 256 /* FIFO not being power of 2 seem to result in all kinds of BusFaults? */
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#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ 1024 /* FIFO not being power of 2 seem to result in all kinds of BusFaults? */
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#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX CFG_TUD_AUDIO_EP_SZ_IN + CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE
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#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ 256
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#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ 1024
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#define CFG_TUD_AUDIO_EP_SZ_IN (48) * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX // 48 Samples (48 kHz) x 2 Bytes/Sample x 1 Channel
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#define CFG_TUD_AUDIO_EP_SZ_OUT (48) * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX // 48 Samples (48 kHz) x 2 Bytes/Sample x 1 Channel
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@ -1 +1 @@
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Subproject commit b9dea4173f50b1c3165bc7c721498607c21dc929
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Subproject commit fa0d1f6c31e8c7ea0b022f8afff96353d64a867a
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@ -38,6 +38,12 @@ uint8_t tu_stm32_edpt_number_cb(uint8_t addr)
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}
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}
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void tu_stm32_sof_cb(void)
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{
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/* Capture timer value */
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TIM2->EGR = TIM_EGR_CC1G;
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}
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// FIXME: Do all three need to be handled, or just the LP one?
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// USB high-priority interrupt (Channel 74): Triggered only by a correct
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// transfer event for isochronous and double-buffer bulk transfer to reach
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@ -87,10 +93,22 @@ void tud_resume_cb(void)
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}
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void USB_Init(void)
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void Timer_Init(void)
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{
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__HAL_REMAPINTERRUPT_USB_ENABLE();
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__HAL_RCC_TIM2_CLK_ENABLE();
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/* TIM2 generates a timebase for USB OUT feedback endpoint */
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TIM2->CR1 = TIM_CLOCKDIVISION_DIV1 | TIM_COUNTERMODE_UP | TIM_AUTORELOAD_PRELOAD_ENABLE;
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TIM2->PSC = 0;
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TIM2->ARR = 0xFFFFFFFFUL;
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TIM2->CCMR1 = (0x1 << TIM_CCMR1_CC1S_Pos);
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TIM2->EGR = TIM_EGR_UG;
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TIM2->CR1 |= TIM_CR1_CEN;
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}
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void GPIO_Init(void)
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{
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/* Configure USB DM and DP pins */
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__HAL_RCC_GPIOA_CLK_ENABLE();
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GPIO_InitTypeDef GPIO_InitStruct;
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@ -100,10 +118,16 @@ void USB_Init(void)
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF14_USB;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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}
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// Enable USB clock
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void USB_Init(void)
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{
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__HAL_REMAPINTERRUPT_USB_ENABLE();
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__HAL_RCC_USB_CLK_ENABLE();
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GPIO_Init();
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Timer_Init();
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// Init classes
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USB_SerialInit();
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USB_AudioInit();
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@ -6,27 +6,26 @@
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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 controls
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// Current states
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bool mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0
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uint16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0
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uint32_t sampFreq;
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uint8_t clkValid;
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// Range states
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audio_control_range_2_n_t(1) volumeRng[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX+1]; // Volume range state
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audio_control_range_4_n_t(1) sampleFreqRng; // Sample frequency range state
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static bool mute[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0
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static uint16_t volume[CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX + 1]; // +1 for master channel 0
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static uint32_t sampFreq = AUDIO_SAMPLE_RATE;
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static uint8_t clkValid = 1;
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// Audio test data
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uint16_t test_buffer_audio[CFG_TUD_AUDIO_EP_SZ_IN/2];
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uint16_t startVal = 0;
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static audio_control_range_4_n_t(1) sampleFreqRng = {
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.wNumSubRanges = 1,
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.subrange[0] = {
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.bMin = AUDIO_SAMPLE_RATE,
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.bMax = AUDIO_SAMPLE_RATE,
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.bRes = 0
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}
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};
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#define FLAG_IN_START 0x00000010UL
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#define FLAG_OUT_START 0x00000100UL
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static volatile uint32_t flags;
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//--------------------------------------------------------------------+
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// Application Callback API Implementations
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//--------------------------------------------------------------------+
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@ -295,8 +294,8 @@ bool tud_audio_rx_done_post_read_cb(uint8_t rhport, uint16_t n_bytes_received, u
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if (flags & FLAG_OUT_START) {
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uint16_t count = tud_audio_available();
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if (count >= (2 * CFG_TUD_AUDIO_EP_SZ_OUT)) {
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/* Wait until at least two frames are in buffer, then start DAC */
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if (count >= (6 * CFG_TUD_AUDIO_EP_SZ_OUT)) {
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/* Wait until at least n frames are in buffer, then start DAC output */
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flags &= (uint32_t) ~FLAG_OUT_START;
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NVIC_EnableIRQ(TIM3_IRQn);
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}
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@ -305,6 +304,7 @@ bool tud_audio_rx_done_post_read_cb(uint8_t rhport, uint16_t n_bytes_received, u
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return true;
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}
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bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request)
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{
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(void) rhport;
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@ -318,7 +318,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque
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if (alt == 1) {
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/* Microphone channel has been activated */
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flags |= FLAG_IN_START;
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printf("IN opened\n");
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}
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break;
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@ -326,7 +325,6 @@ bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_reque
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if (alt == 1) {
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/* Speaker channel has been activated */
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flags |= FLAG_OUT_START;
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printf("OUT opened\n");
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}
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break;
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@ -368,19 +366,20 @@ void tud_audio_feedback_params_cb(uint8_t func_id, uint8_t alt_itf, audio_feedba
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/* Configure parameters for feedback endpoint */
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feedback_param->frequency.mclk_freq = 2 * HAL_RCC_GetPCLK1Freq();
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feedback_param->sample_freq = AUDIO_SAMPLE_RATE;
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feedback_param->method = AUDIO_FEEDBACK_METHOD_FREQUENCY_FLOAT;
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feedback_param->method = AUDIO_FEEDBACK_METHOD_FREQUENCY_FIXED;
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}
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TU_ATTR_FAST_FUNC void tud_audio_feedback_interval_isr(uint8_t func_id, uint32_t frame_number, uint8_t interval_shift)
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{
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static uint32_t prev_cycles = 0;
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uint32_t this_cycles = TIM2->CNT;
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uint32_t this_cycles = TIM2->CCR1; /* Load from capture register, which is set in tu_stm32_sof_cb */
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/* Calculate number of master clock cycles between now and last call */
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uint32_t cycles = (uint32_t) (((uint64_t) this_cycles - prev_cycles) & 0xFFFFFFFFUL);
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TU_ASSERT(cycles != 0, /**/);
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/* Notify the USB audio feedback endpoint */
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tud_audio_feedback_update(0, cycles);
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tud_audio_feedback_update(func_id, cycles);
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/* Prepare for next time */
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prev_cycles = this_cycles;
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@ -390,9 +389,8 @@ void ADC1_2_IRQHandler (void)
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{
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if (ADC2->ISR & ADC_ISR_EOS) {
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ADC2->ISR = ADC_ISR_EOS;
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uint16_t value = ADC2->DR;
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int16_t a = ((int32_t) value - 32768) & 0xFFFFU;
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tud_audio_write (&a, sizeof(value));
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uint16_t value = ((int32_t) ADC2->DR - 32768) & 0xFFFFU;
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tud_audio_write (&value, sizeof(value));
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}
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}
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@ -459,19 +457,7 @@ static void Timer_Init(void)
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TIM3->DIER = TIM_DIER_UIE;
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TIM3->CR1 |= TIM_CR1_CEN;
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__HAL_RCC_TIM2_CLK_ENABLE();
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/* TIM2 generates a timebase for USB OUT feedback endpoint */
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TIM2->CR1 = TIM_CLOCKDIVISION_DIV1 | TIM_COUNTERMODE_UP | TIM_AUTORELOAD_PRELOAD_ENABLE;
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TIM2->PSC = 0;
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TIM2->ARR = 0xFFFFFFFFUL;
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TIM2->EGR = TIM_EGR_UG;
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TIM2->CR1 |= TIM_CR1_CEN;
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NVIC_SetPriority(TIM2_IRQn, 2);
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NVIC_SetPriority(TIM3_IRQn, AIOC_IRQ_PRIO_AUDIO);
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}
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static void ADC_Init(void)
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@ -529,14 +515,6 @@ void DAC_Init(void)
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void USB_AudioInit(void)
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{
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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 = 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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GPIO_Init();
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Timer_Init();
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ADC_Init();
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