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这个函数是配置和启动SPI的DMA传输吗?：HAL_StatusTypeDef HAL_SPI_TransmitReceive_DMA(SPI_HandleTypeDef *hspi, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size) 是从用STM32CubeMX生成的，给果没有传输。参考了STM32Cube_FW_F3_V1.1.0\Projects\STM32F303RE-Nucleo\Examples\SPI\SPI_FullDuplex_ComDMA这 个例子。以下是我的程序。 /** ****************************************************************************** * File Name : main.c * Date : 04/06/2015 09:34:39 * Description : Main program body ****************************************************************************** * * COPYRIGHT(c) 2015 STMicroelectronics * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f3xx_hal.h" /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private variables ---------------------------------------------------------*/ SPI_HandleTypeDef hspi2; DMA_HandleTypeDef hdma_spi2_rx; DMA_HandleTypeDef hdma_spi2_tx; /* USER CODE BEGIN PV */ /* Buffer used for transmission */ #define BUFFERSIZE 16 uint8_t aTxBuffer[] = "****SPI - Two Boards communication based on DMA **** SPI Message ******** SPI Message ******** SPI Message ****"; /* Buffer used for reception */ uint8_t aRxBuffer[BUFFERSIZE]; /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_DMA_Init(void); static void MX_SPI2_Init(void); /* USER CODE BEGIN PFP */ static void Error_Handler(void); /* USER CODE END PFP */ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration----------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* Configure the system clock */ SystemClock_Config(); /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_SPI2_Init(); /* USER CODE BEGIN 2 */ if(HAL_SPI_TransmitReceive_DMA(&hspi2, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE) != HAL_OK) { /* Transfer error in transmission process */ Error_Handler(); } /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,GPIO_PIN_SET); HAL_Delay(100); HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,GPIO_PIN_RESET); HAL_Delay(100); } /* USER CODE END 3 */ } /** System Clock Configuration */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct; RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.HSICalibrationValue = 16; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; HAL_RCC_OscConfig(&RCC_OscInitStruct); RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); __SYSCFG_CLK_ENABLE(); } /* SPI2 init function */ 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_16BIT; hspi2.Init.CLKPolarity = SPI_POLARITY_LOW; hspi2.Init.CLKPhase = SPI_PHASE_1EDGE; hspi2.Init.NSS = SPI_NSS_HARD_OUTPUT; hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2; hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB; hspi2.Init.TIMode = SPI_TIMODE_DISABLED; hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED; hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLED; HAL_SPI_Init(&hspi2); } /** * Enable DMA controller clock */ void MX_DMA_Init(void) { /* DMA controller clock enable */ __DMA1_CLK_ENABLE(); /* DMA interrupt init */ HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn); HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn); } /** Configure pins as * Analog * Input * Output * EVENT_OUT * EXTI */ void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct; /* GPIO Ports Clock Enable */ __GPIOF_CLK_ENABLE(); __GPIOB_CLK_ENABLE(); /*Configure GPIO pin : PB13 */ GPIO_InitStruct.Pin = GPIO_PIN_13; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_LOW; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /** * @brief This function is executed in case of error occurrence. * @param None * @retval None */ static void Error_Handler(void) { while(1) { /* Toogle LED for error */ HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,GPIO_PIN_SET); HAL_Delay(100); HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,GPIO_PIN_RESET); HAL_Delay(1000); } } /* USER CODE END 4 */ #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t* file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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__IO uint32_t wTransferState = SPI_DMA_TRANSFER_WAIT;
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi)
{
wTransferState = SPI_DMA_TRANSFER_COMPLETE;
}
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi)
{
wTransferState = SPI_DMA_TRANSFER_ERROR;
}
请问楼主，我使用DMA接收SPI，在ReceiveOnly模式，3个字节接收，接收到的数据有点奇怪，从我读取到数据来看，像是错位了。
大神，请问那个参数hspi是什么意思？