cc1352P芯片读取A/D芯片ads131a04

用cc1352P芯片读取A/D芯片ads131a04数据，如果用普通方式读取，最高采样频率小于5Khz(实际运用最高达到25.6KHZ),否则因cc1352P速度更不上而丢数据。       想改用DMA方式，但不知道如何设置相关参数. 是否有合适的参考例程可提供？

Alvin Chen：

Dedicated SPI master with up to 6 MHz clock speed
CC1352P最大到6MHZ，不太了解ads131a04

user1317438：

回复 Alvin Chen:

不用了解ADS131A04,该芯片准备好了一个RdyOK，想用DMA高速访问外部A/D,即 怎么修改代码关联上RdyOK。

Alvin Chen：

回复 user1317438:

在C:\ti\simplelink_cc13x2_26x2_sdk_3_20_00_68\source\ti\drivers\spi\里面的SPICC26X2DMA *======== *** ========*/
static void ***(uintptr_t arg0, uintptr_t arg1) {SPI_Transaction*transaction;*** *object = ((SPI_Handle) arg0)->object;while (object->completedTransfers != NULL) {transaction = object->completedTransfers;/* Move object->completedTransfers to the next transaction */object->completedTransfers = object->completedTransfers->nextPtr;transaction->nextPtr = NULL;/* Transaction complete; release power constraints */releaseConstraint((uint32_t) transaction->txBuf);/* Execute callback function for completed transfer */object->transferCallbackFxn((SPI_Handle) arg0, transaction);}
}/**======== *** ========*/
bool ***(SPI_Handle handle, SPI_Transaction *transaction)
{uint8_talignMask;boolbuffersAligned;uintptr_tkey;****object = handle->object;*** const *hwAttrs = handle->hwAttrs;if (transaction->count == 0) {return (false);}key = HwiP_disable();/** Make sure that the buffers are aligned properly.* alignMask is used to check if the RX/TX buffers addresses* are aligned to the frameSize.*/alignMask = (object->dataSize < 9) ? 0x0 : 0x01;buffersAligned = ((((uint32_t) transaction->rxBuf & alignMask) == 0) &&(((uint32_t) transaction->txBuf & alignMask) == 0));if (!buffersAligned ||(object->headPtr && object->transferMode == SPI_MODE_BLOCKING)) {transaction->status = SPI_TRANSFER_FAILED;HwiP_restore(key);return (false);}else {if (object->headPtr) {object->tailPtr->nextPtr = transaction;object->tailPtr = transaction;object->tailPtr->status = SPI_TRANSFER_QUEUED;}else {object->headPtr = transaction;object->tailPtr = transaction;object->framesQueued = 0;object->framesTransferred = 0;object->priTransferSize = 0;object->altTransferSize = 0;object->tailPtr->status =(object->returnPartial != ***) ?SPI_TRANSFER_PEND_CSN_ASSERT :SPI_TRANSFER_STARTED;}object->tailPtr->nextPtr = NULL;}/* In slave mode, optionally enable callback on CSN de-assert */if (object->returnPartial == ***) {object->returnPartial = ***;PIN_setInterrupt(object->pinHandle, object->csnPin | PIN_IRQ_BOTHEDGES);}/* Set constraints to guarantee transaction */setConstraint((uint32_t)transaction->txBuf);/** Polling transfer if BLOCKING mode & transaction->count < threshold* Slaves not allowed to use polling unless timeout is disabled*/if (object->transferMode == SPI_MODE_BLOCKING &&transaction->count < hwAttrs->minDmaTransferSize &&(object->mode == SPI_MASTER ||object->transferTimeout == SPI_WAIT_FOREVER)) {HwiP_restore(key);spiPollingTransfer(object, hwAttrs, transaction);/* Release constraint since transaction is done */releaseConstraint((uint32_t) transaction->txBuf);/* Transaction completed; set status & mark SPI ready */object->headPtr->status = SPI_TRANSFER_COMPLETED;object->headPtr = NULL;object->tailPtr = NULL;}else {/** Perform a DMA backed SPI transfer; we need exclusive access while* priming the transfer to prevent race conditions with* ***().*/primeTransfer(object, hwAttrs);

user1317438：

回复 Alvin Chen:

这段代码用DMA方式如何关联A/D芯片准备好了一个RdyOK，没有明白怎么修改代码