[问答]

HAL_SPI_Transmit不起作用是什么原因造成的？如何解决？

问答对人有帮助，内容完整，我也想知道答案 0 大家好，我尝试通过 SPI 使用我的 STM32L4A6ZG 传输数据。我配置了 Transmitt Only Master 模式并通过硬件选择 NSS。初始化后我检查函数： ret_tx1 = HAL_SPI_GetState(&hspi1); 返回：HAL_SPI_STATE_READY，但是当我尝试传输数据时，我在示波器上既看不到时钟也看不到数据，而且 SPI 返回值是 HAL_SPI_STATE_RESET。我不知道怎么了。我会很感激一些帮助。这是我的代码 /* USER CODE BEGIN Header / /* ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * © Copyright (c) 2020 STMicroelectronics. * All rights reserved. * * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** / / USER CODE END Header / / Includes ------------------------------------------------------------------/ #include "main.h" / Private includes ----------------------------------------------------------/ / USER CODE BEGIN Includes / / USER CODE END Includes / / Private typedef -----------------------------------------------------------/ / USER CODE BEGIN PTD / / USER CODE END PTD / / Private define ------------------------------------------------------------/ / USER CODE BEGIN PD / / USER CODE END PD / / Private macro -------------------------------------------------------------/ / USER CODE BEGIN PM / / USER CODE END PM / / Private variables ---------------------------------------------------------/ SPI_HandleTypeDef hspi1; / USER CODE BEGIN PV / HAL_SPI_StateTypeDef ret_tx1 = HAL_SPI_STATE_ERROR; / USER CODE END PV / / Private function prototypes -----------------------------------------------/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_SPI1_Init(void); / USER CODE BEGIN PFP / / USER CODE END PFP / / Private user code ---------------------------------------------------------/ / USER CODE BEGIN 0 / / 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_SPI1_Init(); / USER CODE BEGIN 2 / ret_tx1 = HAL_SPI_GetState(&hspi1); if(ret_tx1 == HAL_SPI_STATE_READY){ uint8_t tx[8] = {0,1,2,3,4,5,6,7}; // HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, RESET); ret_tx1 = HAL_SPI_Transmit(&hspi1, (uint8_t ) tx, 8, 250); if(ret_tx1 == HAL_SPI_STATE_READY){ HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, SET); } else{ HAL_GPIO_WritePin(GPIOC, GPIO_PIN_7, SET); } } /* USER CODE END 2 / / Infinite loop / / USER CODE BEGIN WHILE / while (1) { / USER CODE END WHILE / / USER CODE BEGIN 3 / } / 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_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_ON; RCC_OscInitStruct.MSICalibrationValue = 0; RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; RCC_OscInitStruct.PLL.PLLM = 1; RCC_OscInitStruct.PLL.PLLN = 40; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2; RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2; 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_DIV1; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { Error_Handler(); } /* Configure the main internal regulator output voltage / if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK) { Error_Handler(); } } /* * @brief SPI1 Initialization Function * @param None * @retval None / static 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 / / SPI1 parameter configuration/ hspi1.Instance = SPI1; hspi1.Init.Mode = SPI_MODE_MASTER; hspi1.Init.Direction = SPI_DIRECTION_2LINES; hspi1.Init.DataSize = SPI_DATASIZE_8BIT; hspi1.Init.NSS = SPI_NSS_HARD_OUTPUT; hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128; hspi1.Init.TIMode = SPI_TIMODE_ENABLE; hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE; hspi1.Init.CRCPolynomial = 7; hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE; hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE; if (HAL_SPI_Init(&hspi1) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN SPI1_Init 2 / / USER CODE END SPI1_Init 2 / } /* * @brief GPIO Initialization Function * @param None * @retval None / static void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct = {0}; / GPIO Ports Clock Enable / __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_RESET); /Configure GPIO pin Output Level / HAL_GPIO_WritePin(GPIOC, GPIO_PIN_7, GPIO_PIN_RESET); /Configure GPIO pin : PB14 / GPIO_InitStruct.Pin = GPIO_PIN_14; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /Configure GPIO pin : PC7 / GPIO_InitStruct.Pin = GPIO_PIN_7; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); } / 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 / / 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, tex: printf("Wrong parameters value: file %s on line %drn", file, line) / / USER CODE END 6 / } #endif / USE_FULL_ASSERT / /********************* (C) COPYRIGHT STMicroelectronics *END OF FILE**/ 0
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答案对人有帮助，有参考价值 0 HAL_SPI_Transmit 的返回值是 HAL_StatusTypeDef 类型，而不是 HAL_SPI_StateTypeDef。你的编译器应该给你一个警告。如果失败，请查看 hspi->ErrorCode 以查看错误标志。

2023-1-13 15:47:34 评论举报郭燕