/** Initialize audio rx
* - get pointer to buffer pool
* - register interrupt handler
* - initialize RX queue
* Parameters:
* @param pThis pointer to own object
* @param pBuffP pointer to buffer pool to take and return chunks from
* @param pIsrDisp pointer to interrupt dispatcher to get ISR registered
*
* @return Zero on success.
* Negative value on failure.
*/
int uartRx_init(uartRx_t *pThis, bufferPool_t *pBuffP,
isrDisp_t *pIsrDisp)
{
if ( NULL == pThis || NULL == pBuffP || NULL == pIsrDisp) {
//printf("[UART_RX]: Failed init\r\n");
return FAIL;
}
pThis->pPending = NULL;
pThis->pBuffP = pBuffP;
pThis->state = UARTRX_WAITING;
// init queue with
queue_init(&pThis->queue, UARTRX_QUEUE_DEPTH);
/* Configure the DMA3 for RX (data receive/memory write) */
/* Read, 1-D, interrupt enabled, Memory write operation, 16 bit transfer,
* Auto buffer
*/
*pDMA10_CONFIG = 0x10A2;//0xA2; //SYNC | WNR | WDSIZE_8 | DI_EN;
/**
* Register the interrupt handler
*/
isrDisp_registerCallback(pIsrDisp, ISR_DMA10_UART1_RX, uartRx_isr, pThis);
//printf("[UART_RX]: RX init complete\r\n");
return PASS;
}
/** Initialize audio tx
* - get pointer to buffer pool
* - register interrupt handler
* - initialize TX queue
* Parameters:
* @param pThis pointer to own object
* @param pBuffP pointer to buffer pool to take and return chunks from
* @param pIsrDisp pointer to interrupt dispatcher to get ISR registered
*
* @return Zero on success.
* Negative value on failure.
*/
int audioTx_init(audioTx_t *pThis, bufferPool_t *pBuffP,
isrDisp_t *pIsrDisp)
{
// parameter checking
if ( NULL == pThis || NULL == pBuffP || NULL == pIsrDisp ) {
printf("[Audio TX]: Failed init \r\n");
return FAIL;
}
// store pointer to buffer pool for later access
pThis->pBuffP = pBuffP;
pThis->pPending = NULL; // nothing pending
pThis->running = 0; // DMA turned off by default
// init queue
queue_init(&pThis->queue, AUDIOTX_QUEUE_DEPTH);
/* Configure the DMA4 for TX (data transfer/memory read) */
/* Read, 2-D, interrupt enabled, 16 bit transfer, Auto buffer */
*pDMA4_CONFIG = WDSIZE_16 | DI_EN; //| DMA2D; /* 16 bit and DMA enable */
// register own ISR to the ISR dispatcher
isrDisp_registerCallback(pIsrDisp, ISR_DMA4_SPORT0_TX, audioTx_isr, pThis);
printf("[Audio TX]: TX init complete \r\n");
return PASS;
}
