[问答]

如何重复调用HAL_SPI_TxCpltCallback() DMA循环模式？

问答对人有帮助，内容完整，我也想知道答案 0 我想使用 SPI 仅传输主模式将移位寄存器（74HC595）与 STM32F103C8T6 MCU 连接起来。我需要连续写入移位寄存器，以便它不断更新 op 引脚。所以我将 SPI DMA 设置为循环模式，当传输完成时我需要提供锁存时钟，所以我使用 HAL_SPI_TxCpltCallback() 函数但它只在 HAL_SPI_Transmit_DMA() 调用时调用一次。如何重复调用 HAL_SPI_TxCpltCallback() DMA 循环模式？我的目标是在 while 循环外使用 DMA 不断更新 SHIFTREISTERs 引脚。 /* USER CODE BEGIN Header / /* ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2022 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** / / USER CODE END Header / / Includes ------------------------------------------------------------------/ #include "main.h" #include "dma.h" #include "spi.h" #include "gpio.h" / Private includes ----------------------------------------------------------/ / USER CODE BEGIN Includes / #include "stdbool.h" / USER CODE END Includes / / Private typedef -----------------------------------------------------------/ / USER CODE BEGIN PTD / / USER CODE END PTD / / Private define ------------------------------------------------------------/ / USER CODE BEGIN PD / #define NO_OF_OP 8 / USER CODE END PD / / Private macro -------------------------------------------------------------/ / USER CODE BEGIN PM / / USER CODE END PM / / Private variables ---------------------------------------------------------/ / USER CODE BEGIN PV / bool OP[NO_OF_OP]; uint8_t data = 0; / USER CODE END PV / / Private function prototypes -----------------------------------------------/ void SystemClock_Config(void); / USER CODE BEGIN PFP / void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef hspi) { HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_SET); HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_RESET); } void write_to_reg(){ HAL_GPIO_WritePin(LATCH_CLOCK_GPIO_Port,LATCH_CLOCK_Pin,GPIO_PIN_RESET); for (int x = NO_OF_OP-1; x >= 0; x--) { HAL_GPIO_WritePin(A_GPIO_Port,A_Pin,OP[x]); //delay_us(10); HAL_GPIO_WritePin(SHIFT_CLK_GPIO_Port,SHIFT_CLK_Pin,GPIO_PIN_RESET); //delay_us(50); HAL_GPIO_WritePin(SHIFT_CLK_GPIO_Port,SHIFT_CLK_Pin,GPIO_PIN_SET); } HAL_GPIO_WritePin(LATCH_CLOCK_GPIO_Port,LATCH_CLOCK_Pin,GPIO_PIN_SET); //delay_us(100); HAL_GPIO_WritePin(LATCH_CLOCK_GPIO_Port,LATCH_CLOCK_Pin,GPIO_PIN_RESET); } /* USER CODE END PFP / / Private user code ---------------------------------------------------------/ / USER CODE BEGIN 0 / uint8_t bit_to_byte(bool bitarray){ uint8_t byt = 0x00; for (uint8_t j = 0; j < 8; ++j) { if (bitarray[j]) { byt = byt \| (1< } } return byt; } /* USER CODE END 0 / /* * @brief The application entry point. * @retval int / 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(); / USER CODE BEGIN Init / / USER CODE END Init / / Configure the system clock / SystemClock_Config(); / USER CODE BEGIN SysInit / / USER CODE END SysInit / / Initialize all configured peripherals / MX_GPIO_Init(); MX_DMA_Init(); MX_SPI1_Init(); / USER CODE BEGIN 2 / HAL_GPIO_WritePin(OE_GPIO_Port,OE_Pin,GPIO_PIN_RESET); HAL_GPIO_WritePin(ENABLE_GPIO_Port, ENABLE_Pin, GPIO_PIN_RESET); HAL_SPI_Transmit_DMA(&hspi1, &data, 1); / USER CODE END 2 / / Infinite loop / / USER CODE BEGIN WHILE / while (1) { / USER CODE END WHILE / / USER CODE BEGIN 3 / OP[0] = true; OP[1] = true; OP[2] = true; OP[3] = true; OP[4] = false; OP[5] = false; OP[6] = false; OP[7] = false; data = bit_to_byte(OP); /* HAL_SPI_Transmit_DMA(&hspi1,&data,1); HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_SET); HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_RESET); / HAL_Delay(100); OP[0] = false; OP[1] = false; OP[2] = false; OP[3] = false; OP[4] = true; OP[5] = true; OP[6] = true; OP[7] = true; data = bit_to_byte(OP); / HAL_SPI_Transmit_DMA(&hspi1,&data,1); HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_SET); HAL_GPIO_WritePin(L_CLK_GPIO_Port, L_CLK_Pin, GPIO_PIN_RESET); */ HAL_Delay(100); } / USER CODE END 3 / } /* * @brief System Clock Configuration * @retval None / void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /* Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. / RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /* Initializes the CPU, AHB and APB buses clocks / RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK\|RCC_CLOCKTYPE_SYSCLK \|RCC_CLOCKTYPE_PCLK1\|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) { Error_Handler(); } /* Enables the Clock Security System / HAL_RCC_EnableCSS(); } / USER CODE BEGIN 4 / / USER CODE END 4 / /* * @brief This function is executed in case of error occurrence. * @retval None / void Error_Handler(void) { / USER CODE BEGIN Error_Handler_Debug / / User can add his own implementation to report the HAL error return state / __disable_irq(); while (1) { } / USER CODE END Error_Handler_Debug / } #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 %drn", file, line) / / USER CODE END 6 / } #endif / USE_FULL_ASSERT / void MX_SPI1_Init(void) { / USER CODE BEGIN SPI1_Init 0 / / USER CODE END SPI1_Init 0 / / USER CODE BEGIN SPI1_Init 1 / / USER CODE END SPI1_Init 1 / hspi1.Instance = SPI1; hspi1.Init.Mode = SPI_MODE_MASTER; hspi1.Init.Direction = SPI_DIRECTION_2LINES; hspi1.Init.DataSize = SPI_DATASIZE_8BIT; hspi1.Init.CLKPolarity = SPI_POLARITY_LOW; hspi1.Init.CLKPhase = SPI_PHASE_1EDGE; hspi1.Init.NSS = SPI_NSS_SOFT; hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4; hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB; hspi1.Init.TIMode = SPI_TIMODE_DISABLE; hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE; hspi1.Init.CRCPolynomial = 10; if (HAL_SPI_Init(&hspi1) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN SPI1_Init 2 / / USER CODE END SPI1_Init 2 / } void HAL_SPI_MspInit(SPI_HandleTypeDef spiHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(spiHandle->Instance==SPI1) { /* USER CODE BEGIN SPI1_MspInit 0 / / USER CODE END SPI1_MspInit 0 / / SPI1 clock enable / __HAL_RCC_SPI1_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /SPI1 GPIO Configuration PA5 ------> SPI1_SCK PA7 ------> SPI1_MOSI / GPIO_InitStruct.Pin = GPIO_PIN_5\|GPIO_PIN_7; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* SPI1 DMA Init / / SPI1_TX Init / hdma_spi1_tx.Instance = DMA1_Channel3; hdma_spi1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_spi1_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_spi1_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_spi1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_spi1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_spi1_tx.Init.Mode = DMA_NORMAL; hdma_spi1_tx.Init.Priority = DMA_PRIORITY_MEDIUM; if (HAL_DMA_Init(&hdma_spi1_tx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(spiHandle,hdmatx,hdma_spi1_tx); / USER CODE BEGIN SPI1_MspInit 1 / / USER CODE END SPI1_MspInit 1 */ } } 0
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答案对人有帮助，有参考价值 0 hdma_spi1_tx.Init.Mode = DMA_NORMAL; 这是一次性转移。您需要 DMA_CIRCULAR 进行循环传输。

2022-12-13 10:10:43 评论举报张珍岚