我正在使用STM32L496微控制器,其中我按照以下方式初始化hspi3-
void MX_SPI3_Init()
{
SPI_HandleTypeDef hspi3;
/* SPI3 parameter configuration*/
hspi3.Instance = SPI3;
hspi3.Init.Mode = SPI_MODE_MASTER;
hspi3.Init.Direction = SPI_DIRECTION_2LINES;
hspi3.Init.DataSize = SPI_DATASIZE_8BIT;
hspi3.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi3.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi3.Init.NSS = SPI_NSS_SOFT;
hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi3.Init.CRCPolynomial = 7;
hspi3.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi3.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
if (HAL_SPI_Init(&hspi3) != HAL_OK)
{
Error_Handler();
}
}
在我的HAL_SPI_Init(&hspi3)
函数内部,hspi3
没有给出任何错误代码,它转到hspi->State = HAL_SPI_STATE_READY;
IMAGE。但是在监视窗口中,hspi3
状态不会得到更新。它保持在HAL_SPI_STATE_RESET
。因此,当我尝试如下所示使用SPI发送一些数据时,它失败-
void TIM3_IRQHandler(void)
{
static uint16_t sinTableIndex = 0;
uint8_t data_on_spi[3];
SysTime_mainFunction();
if (getOperatingState() == CONTROL){
data_on_spi[0]=sinTable[sinTableIndex] & MASK_LOW_BYTE;
data_on_spi[1]=sinTable[sinTableIndex] & MASK_MID_BYTE;
data_on_spi[2]=sinTable[sinTableIndex] & MASK_HIGH_BYTE;
HAL_GPIO_WritePin(SPI3_Chip_Select_DAC_GPIO_Port,SPI3_Chip_Select_DAC_Pin,GPIO_PIN_RESET);
if(HAL_SPI_Transmit(&hspi3, (uint8_t*)data_on_spi, 3,1) != HAL_OK)
{
/* Transfer error in transmission process */
Error_Handler();
}
HAL_GPIO_WritePin(SPI3_Chip_Select_DAC_GPIO_Port,SPI3_Chip_Select_DAC_Pin,GPIO_PIN_SET);
sinTableIndex++;
if (sinTableIndex >= maxTableSize)
{
sinTableIndex = 0;
}
}
HAL_TIM_IRQHandler(&htim3);
}
当我HAL_SPI_Transmit(&hspi3, (uint8_t*)data_on_spi, 3,1)
时,它将进入错误处理程序,因为它将SPI状态识别为HAL_SPI_STATE_RESET
。需要帮助以了解为什么会发生这种情况。
编辑:我认为问题是,当我尝试执行HAL_SPI_Transmit(&hspi3, (uint8_t*)data_on_spi, 3,1)
时,即使完成__HAL_LOCK(hspi)
,LOCK也会保持解锁状态。