解決:我必須處理從機的CS/NSS引腳。在TX之前和之後添加一些延遲。CC3200 SPI從機壞接收
void SlaveMain()
{
MAP_SPIReset(GSPI_BASE);
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
SPI_IF_BIT_RATE,SPI_MODE_SLAVE,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVELOW |
SPI_WL_8));
MAP_SPIEnable(GSPI_BASE);
}
while(1)
{
MAP_SPICSEnable(GSPI_BASE);
MAP_SPIDataGet(GSPI_BASE, &data);
Report("Got: %d\n\r", data);
MAP_SPICSDisable(GSPI_BASE);
}
我的問題是,我通過SPI接收到來自STM32F4板的錯誤數據。我的CC3200板SPI從配置:
#define SPI_IF_BIT_RATE 100000
void SlaveMain()
{
// Set Tx buffer index
ucTxBuffNdx = 0;
ucRxBuffNdx = 0;
// Reset SPI
MAP_SPIReset(GSPI_BASE);
// Configure SPI interface
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
SPI_IF_BIT_RATE,SPI_MODE_SLAVE,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_8));
// Register Interrupt Handler
MAP_SPIIntRegister(GSPI_BASE,SlaveIntHandler);
// Enable Interrupts
MAP_SPIIntEnable(GSPI_BASE,SPI_INT_RX_FULL|SPI_INT_TX_EMPTY);
// Enable SPI for communication
MAP_SPIEnable(GSPI_BASE);
Message("Enabled SPI Interface in Slave Mode\n\rReceived : ");
}
中斷:
static void SlaveIntHandler()
{
unsigned long ulRecvData;
unsigned long ulStatus;
ulStatus = MAP_SPIIntStatus(GSPI_BASE,true);
MAP_SPIIntClear(SSPI_BASE,SPI_INT_RX_FULL|SPI_INT_TX_EMPTY);
if(ulStatus & SPI_INT_RX_FULL)
{
MAP_SPIDataGetNonBlocking(GSPI_BASE,&ulRecvData);
Report("Received: %d\n\r",ulRecvData);
}
}
而對於SPI主我的STM32F4板配置:
void MX_SPI2_Init(void)
{
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 10;
HAL_SPI_Init(&hspi2);
}
uint8_t data;
while (1)
{
HAL_Delay(500);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);
data = 6;
HAL_SPI_Transmit(&hspi2, &data, 1, 50);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
HAL_Delay(500);
}
哪裏可能是一個問題?
'Report()'做了什麼?從中斷處理程序調用它是否安全? –
它通過窗口打印。 Printf給出相同的值。 –