int dmacHw_readTransferredData(dmacHw_HANDLE_t handle, /* [ IN ] DMA Channel handle */
dmacHw_CONFIG_t *pConfig, /* [ IN ] Configuration settings */
void *pDescriptor, /* [ IN ] Descriptor buffer */
void **ppBbuf, /* [ OUT ] Data received */
size_t *pLlen /* [ OUT ] Length of the data received */
) {
dmacHw_DESC_RING_t *pRing = dmacHw_GET_DESC_RING(pDescriptor);
(void)handle;
if (pConfig->transferMode != dmacHw_TRANSFER_MODE_CONTINUOUS) {
if (((pRing->pTail->ctl.hi & dmacHw_DESC_FREE) == 0) ||
(pRing->pTail == pRing->pHead)
) {
/* No receive data available */
*ppBbuf = (char *)NULL;
*pLlen = 0;
return 0;
}
}
/* Return read buffer and length */
*ppBbuf = (char *)pRing->pTail->dar;
/* Extract length of the received data */
if (DmaIsFlowController(pDescriptor)) {
uint32_t srcTrSize = 0;
switch (pRing->pTail->ctl.lo & dmacHw_REG_CTL_SRC_TR_WIDTH_MASK) {
case dmacHw_REG_CTL_SRC_TR_WIDTH_8:
srcTrSize = 1;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_16:
srcTrSize = 2;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_32:
srcTrSize = 4;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_64:
srcTrSize = 8;
break;
default:
dmacHw_ASSERT(0);
}
/* Calculate length from the block size */
*pLlen =
(pRing->pTail->ctl.hi & dmacHw_REG_CTL_BLOCK_TS_MASK) *
srcTrSize;
} else {
/* Extract length from the source peripheral */
*pLlen = pRing->pTail->sstat;
}
/* Advance tail to next descriptor */
dmacHw_NEXT_DESC(pRing, pTail);
return 1;
}
int dmacHw_readTransferredData(dmacHw_HANDLE_t handle,
dmacHw_CONFIG_t *pConfig,
void *pDescriptor,
void **ppBbuf,
size_t *pLlen
) {
dmacHw_DESC_RING_t *pRing = dmacHw_GET_DESC_RING(pDescriptor);
(void)handle;
if (pConfig->transferMode != dmacHw_TRANSFER_MODE_CONTINUOUS) {
if (((pRing->pTail->ctl.hi & dmacHw_DESC_FREE) == 0) ||
(pRing->pTail == pRing->pHead)
) {
*ppBbuf = (char *)NULL;
*pLlen = 0;
return 0;
}
}
*ppBbuf = (char *)pRing->pTail->dar;
if (DmaIsFlowController(pDescriptor)) {
uint32_t srcTrSize = 0;
switch (pRing->pTail->ctl.lo & dmacHw_REG_CTL_SRC_TR_WIDTH_MASK) {
case dmacHw_REG_CTL_SRC_TR_WIDTH_8:
srcTrSize = 1;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_16:
srcTrSize = 2;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_32:
srcTrSize = 4;
break;
case dmacHw_REG_CTL_SRC_TR_WIDTH_64:
srcTrSize = 8;
break;
default:
dmacHw_ASSERT(0);
}
*pLlen =
(pRing->pTail->ctl.hi & dmacHw_REG_CTL_BLOCK_TS_MASK) *
srcTrSize;
} else {
*pLlen = pRing->pTail->sstat;
}
dmacHw_NEXT_DESC(pRing, pTail);
return 1;
}
