This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
使用msp430f5529运行ti-rtos驱动spi仿真发现从spi的RXBUF中有数据,程序运行时无法跳过SPI_transfer(),运行到__no_operation();。
主要的taskFxn函数如下。
void pm25ld020taskFxn(UArg arg0, UArg arg1) {
GPIO_write(ZKS_GASSENSOR_X2_SPI_PM25LD020_CE,
ZKS_GASSENSOR_X2_PM25LD020_ENABLE);
SPI_Handle spi_handle_pm25ld020;
Bool transferOK;
SPI_Params spiParams_pm25ld020;
SPI_Params_init(&spiParams_pm25ld020);
spiParams_pm25ld020.transferMode = SPI_MODE_BLOCKING;
spiParams_pm25ld020.transferCallbackFxn = NULL;
spiParams_pm25ld020.bitRate = 8000000;
spi_handle_pm25ld020 = SPI_open(Board_SPI_PM25LD020, &spiParams_pm25ld020);
SPI_Transaction spi_transaction_pm25ld020;
UChar transmitBuffer[1] = { 0x9f };
UChar receiveBuffer[4] = { 0x04 };
spi_transaction_pm25ld020.count = 4;
spi_transaction_pm25ld020.txBuf = (Ptr) transmitBuffer;
spi_transaction_pm25ld020.rxBuf = (Ptr) receiveBuffer;
transferOK = SPI_transfer(spi_handle_pm25ld020, &spi_transaction_pm25ld020);
__no_operation();
GPIO_write(ZKS_GASSENSOR_X2_SPI_PM25LD020_CE,
ZKS_GASSENSOR_X2_PM25LD020_DISABLE);
if (!transferOK) {
/* Error in SPI transfer or transfer is already in progress */
}
}
RTOS 中的spi嵌套了dma,现在问题应该是出在DMA上,应该怎么解决呢
DMA的配置没有修改程序如下
Void MSP_EXP430F5529LP_isrDMA(UArg arg)
{
/* Call the SPI DMA function, passing the SPI handle used for WiFi */
SPI_serviceISR((SPI_Handle) &(SPI_config[0]));
__no_operation();
}
#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_SECTION(SPI_config, ".const:SPI_config")
#pragma DATA_SECTION(spiUSCIBDMAHWAttrs, ".const:spiUSCIBDMAHWAttrs")
#endif
#include <ti/drivers/SPI.h>
#include <ti/drivers/spi/SPIUSCIBDMA.h>
SPIUSCIBDMA_Object spiUSCIBDMAObjects[MSP_EXP430F5529LP_SPICOUNT];
uint8_t spiUSCIBDMAscratchBuf[MSP_EXP430F5529LP_SPICOUNT];
const SPIUSCIBDMA_HWAttrs spiUSCIBDMAHWAttrs[MSP_EXP430F5529LP_SPICOUNT] = {
{
.baseAddr = USCI_B0_BASE,
.clockSource = USCI_B_SPI_CLOCKSOURCE_SMCLK,
.bitOrder = USCI_B_SPI_MSB_FIRST,
.scratchBufPtr = &spiUSCIBDMAscratchBuf[0],
.defaultTxBufValue = 0,
/* DMA */
.dmaBaseAddr = DMA_BASE,
/* Rx Channel */
.rxDMAChannelIndex = DMA_CHANNEL_1,
.rxDMASourceTrigger = DMA_TRIGGERSOURCE_18,
/* Tx Channel */
.txDMAChannelIndex = DMA_CHANNEL_0,
.txDMASourceTrigger = DMA_TRIGGERSOURCE_19
}
};
const SPI_Config SPI_config[] = {
{
.fxnTablePtr = &SPIUSCIBDMA_fxnTable,
.object = &spiUSCIBDMAObjects[0],
.hwAttrs = &spiUSCIBDMAHWAttrs[0]
},
{NULL, NULL, NULL},
};