/**
* @brief USBD_CDC_DataIn
* Data sent on non-control IN endpoint
* @param pdev: device instance
* @param epnum: endpoint number
* @retval status
*/
static uint8_t USBD_CDC_DataIn (void *pdev, uint8_t epnum)
{
uint16_t i;
if (USBD_CDC_InFlight != 0) {
USBD_CDC_InFlight = 0;
}
if (ringbuffer_isempty(&USBD_CDC_D2H_FIFO) == 0)
{
for (i = 0; i < CDC_DATA_IN_PACKET_SIZE && ringbuffer_isempty(&USBD_CDC_D2H_FIFO) == 0; i++) {
USBD_CDC_D2H_Buff[i] = ringbuffer_pop(&USBD_CDC_D2H_FIFO);
}
dbgwdg_feed();
DCD_EP_Tx (pdev,
USBD_Dev_CDC_D2H_EP,
(uint8_t*)USBD_CDC_D2H_Buff,
i);
USBD_CDC_InFlight = 1;
}
if (USBD_CDC_InFlight == 0) {
DCD_EP_Flush(pdev, epnum);
}
return USBD_OK;
}
void USART1_IRQHandler(void)
{
if (USART_GetITStatus(CEREAL_USARTx, USART_IT_RXNE) != RESET)
{
uint8_t c = cereal_rx_raw();
if (!ringbuffer_isfull(&cereal_incoming))
{
ringbuffer_push(&cereal_incoming, c);
if (c == 0 || c == '\r' || c == '\n') {
cereal_incoming.flag = 1;
}
}
else
{
cereal_incoming.flag = 1;
}
}
if (USART_GetITStatus(CEREAL_USARTx, USART_IT_TXE) != RESET )
{
#ifdef ENABLE_CEREAL_BUFFERED_TX
if (!ringbuffer_isempty(&cereal_outgoing)) {
cereal_tx_raw(ringbuffer_pop(&cereal_outgoing));
}
else {
cereal_outgoing.flag = 0;
USART_ITConfig(CEREAL_USARTx, USART_IT_TXE, DISABLE);
}
#endif
}
}
int16_t cereal_peek()
{
if (!ringbuffer_isempty(&cereal_incoming)) {
return ringbuffer_peek(&cereal_incoming);
}
else {
return -1;
}
}
static uint8_t USBD_CDC_SOF (void *pdev)
{
if (CdcFrameCount >= CDC_IN_FRAME_INTERVAL)
{
if (USBD_CDC_InFlight == 0)
{
if (USBD_CDC_D2H_FIFO.ready == 0xAB)
{
USBD_CDC_IsReady = 1;
if (ringbuffer_isempty(&USBD_CDC_D2H_FIFO) == 0)
{
uint16_t i;
for (i = 0; i < CDC_DATA_IN_PACKET_SIZE && ringbuffer_isempty(&USBD_CDC_D2H_FIFO) == 0; i++) {
USBD_CDC_D2H_Buff[i] = ringbuffer_pop(&USBD_CDC_D2H_FIFO);
}
DCD_EP_Tx (pdev,
USBD_Dev_CDC_D2H_EP,
(uint8_t*)USBD_CDC_D2H_Buff,
i);
USBD_CDC_InFlight = 1;
CdcFrameCount = 0;
}
}
}
else if (CdcFrameCount > 100) // timeout on waiting
{
led_1_tog();
CdcFrameCount = 0;
USBD_CDC_InFlight = 0;
DCD_EP_Flush(pdev, USBD_Dev_CDC_D2H_EP);
}
}
CdcFrameCount++;
return USBD_OK;
}
static void soundcard_sdlcallback(void* userdata, Uint8* stream, int len) {
ringbuffer* buff = (ringbuffer*) userdata;
if (ringbuffer_isempty(buff)) {
//log_println(LEVEL_INFO, TAG, "audio buffer empty");
return;
}
len /= sizeof(int16_t);
unsigned int available = ringbuffer_samplesavailable(buff);
if (len > available) {
//log_println(LEVEL_INFO, TAG, "available buffer is smaller than what is needed, want %d have %u", len,
// available);
len = available;
}
for (int i = 0; i < len; i++) {
int16_t value = ringbuffer_get(buff);
*((int16_t*) stream) = value;
stream += sizeof(value);
}
}
uint8_t cereal_wait_rx()
{
while (ringbuffer_isempty(&cereal_incoming)) ;
return ringbuffer_pop(&cereal_incoming);
}
