514 lines
15 KiB
C
514 lines
15 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file I2C/I2C_TwoBoards_ComDMA/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32WLxx I2C HAL API to transmit
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* and receive a data buffer with a communication process based on
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* DMA transfer.
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* The communication is done using 2 Boards.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* Uncomment this line to use the board as master, if not it is used as slave */
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//#define MASTER_BOARD
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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I2C_HandleTypeDef hi2c1;
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DMA_HandleTypeDef hdma_i2c1_tx;
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DMA_HandleTypeDef hdma_i2c1_rx;
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/* USER CODE BEGIN PV */
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/* Buffer used for transmission */
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uint8_t aTxBuffer[] = " ****I2C_TwoBoards communication based on DMA**** ****I2C_TwoBoards communication based on DMA**** ****I2C_TwoBoards communication based on DMA**** ";
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/* Buffer used for reception */
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uint8_t aRxBuffer[RXBUFFERSIZE];
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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static void MX_DMA_Init(void);
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static void MX_I2C1_Init(void);
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/* USER CODE BEGIN PFP */
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/* Private function prototypes -----------------------------------------------*/
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static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* STM32WLxx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_DMA_Init();
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MX_I2C1_Init();
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/* USER CODE BEGIN 2 */
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/* Configure LED2 and LED3 */
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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#ifdef MASTER_BOARD
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/* Configure User push-button (B1) */
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BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_GPIO);
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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/* Wait for User push-button (B1) press before starting the Communication */
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while (BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_RESET)
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{
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}
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/* Delay to avoid that possible signal rebound is taken as button release */
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HAL_Delay(50);
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/* Wait for User push-button (B1) release before starting the Communication */
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while (BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_SET)
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{
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}
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/* The board sends the message and expects to receive it back */
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/*##- Start the transmission process #####################################*/
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/* While the I2C in reception process, user can transmit data through
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"aTxBuffer" buffer */
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do
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{
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if (HAL_I2C_Master_Transmit_DMA(&hi2c1, (uint16_t)I2C_ADDRESS, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
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{
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/* Error_Handler() function is called when error occurs. */
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Error_Handler();
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}
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/*##- Wait for the end of the transfer #################################*/
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/* Before starting a new communication transfer, you need to check the current
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state of the peripheral; if it is busy you need to wait for the end of current
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transfer before starting a new one.
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For simplicity reasons, this example is just waiting till the end of the
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transfer, but application may perform other tasks while transfer operation
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is ongoing. */
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while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
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{
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}
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/* When Acknowledge failure occurs (Slave don't acknowledge it's address)
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Master restarts communication */
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}
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while (HAL_I2C_GetError(&hi2c1) == HAL_I2C_ERROR_AF);
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/* Wait for User push-button (B1) press before starting the Communication */
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while (BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_RESET)
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{
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}
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/* Delay to avoid that possible signal rebound is taken as button release */
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HAL_Delay(50);
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/* Wait for User push-button (B1) release before starting the Communication */
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while (BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_SET)
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{
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}
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/*##- Put I2C peripheral in reception process ###########################*/
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do
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{
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if (HAL_I2C_Master_Receive_DMA(&hi2c1, (uint16_t)I2C_ADDRESS, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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/* Error_Handler() function is called when error occurs. */
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Error_Handler();
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}
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/*##- Wait for the end of the transfer #################################*/
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/* Before starting a new communication transfer, you need to check the current
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state of the peripheral; if it is busy you need to wait for the end of current
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transfer before starting a new one.
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For simplicity reasons, this example is just waiting till the end of the
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transfer, but application may perform other tasks while transfer operation
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is ongoing. */
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while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
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{
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}
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/* When Acknowledge failure occurs (Slave don't acknowledge it's address)
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Master restarts communication */
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}
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while (HAL_I2C_GetError(&hi2c1) == HAL_I2C_ERROR_AF);
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#else
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/* The board receives the message and sends it back */
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/*##- Put I2C peripheral in reception process ###########################*/
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if (HAL_I2C_Slave_Receive_DMA(&hi2c1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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/* Transfer error in reception process */
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Error_Handler();
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}
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/*##- Wait for the end of the transfer ###################################*/
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/* Before starting a new communication transfer, you need to check the current
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state of the peripheral; if it is busy you need to wait for the end of current
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transfer before starting a new one.
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For simplicity reasons, this example is just waiting till the end of the
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transfer, but application may perform other tasks while transfer operation
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is ongoing. */
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while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
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{
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}
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/*##- Start the transmission process #####################################*/
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/* While the I2C in reception process, user can transmit data through
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"aTxBuffer" buffer */
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if (HAL_I2C_Slave_Transmit_DMA(&hi2c1, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
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{
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/* Transfer error in transmission process */
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Error_Handler();
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}
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#endif /* MASTER_BOARD */
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/*##- Wait for the end of the transfer ###################################*/
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/* Before starting a new communication transfer, you need to check the current
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state of the peripheral; if it is busy you need to wait for the end of current
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transfer before starting a new one.
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For simplicity reasons, this example is just waiting till the end of the
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transfer, but application may perform other tasks while transfer operation
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is ongoing. */
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while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
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{
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}
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/*##- Compare the sent and received buffers ##############################*/
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if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, RXBUFFERSIZE))
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{
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/* Processing Error */
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Error_Handler();
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}
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/* Infinite loop */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
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RCC_OscInitStruct.MSIState = RCC_MSI_ON;
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RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
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|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
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|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief I2C1 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_I2C1_Init(void)
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{
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/* USER CODE BEGIN I2C1_Init 0 */
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/* USER CODE END I2C1_Init 0 */
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/* USER CODE BEGIN I2C1_Init 1 */
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/* USER CODE END I2C1_Init 1 */
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hi2c1.Instance = I2C1;
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hi2c1.Init.Timing = 0x0030081C;
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hi2c1.Init.OwnAddress1 = I2C_ADDRESS;
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hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_10BIT;
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hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
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hi2c1.Init.OwnAddress2 = 0;
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hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
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hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
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hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
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if (HAL_I2C_Init(&hi2c1) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure Analogue filter
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*/
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if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure Digital filter
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*/
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if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0x0) != HAL_OK)
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{
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Error_Handler();
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}
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/** I2C Fast mode Plus enable
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*/
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HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C1);
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/* USER CODE BEGIN I2C1_Init 2 */
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/* USER CODE END I2C1_Init 2 */
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}
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/**
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* Enable DMA controller clock
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*/
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static void MX_DMA_Init(void)
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{
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/* DMA controller clock enable */
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__HAL_RCC_DMAMUX1_CLK_ENABLE();
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__HAL_RCC_DMA1_CLK_ENABLE();
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/* DMA interrupt init */
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/* DMA1_Channel1_IRQn interrupt configuration */
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HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
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/* DMA1_Channel2_IRQn interrupt configuration */
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HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOB_CLK_ENABLE();
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}
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/* USER CODE BEGIN 4 */
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/**
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* @brief Compares two buffers.
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* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length
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* @retval 0 : pBuffer1 identical to pBuffer2
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* >0 : pBuffer1 differs from pBuffer2
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*/
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static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength)
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{
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while (BufferLength--)
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{
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if ((*pBuffer1) != *pBuffer2)
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{
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return BufferLength;
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}
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pBuffer1++;
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pBuffer2++;
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}
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return 0;
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}
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/**
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* @brief Tx Transfer completed callback.
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* @param I2cHandle: I2C handle.
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* @note This example shows a simple way to report end of DMA Tx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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#ifdef MASTER_BOARD
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void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *I2cHandle)
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{
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/* Toggle LED2: Transfer in transmission process is correct */
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BSP_LED_Toggle(LED2);
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}
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#else
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void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *I2cHandle)
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{
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/* Toggle LED2: Transfer in transmission process is correct */
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BSP_LED_Toggle(LED2);
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}
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#endif /* MASTER_BOARD */
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/**
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* @brief Rx Transfer completed callback.
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* @param I2cHandle: I2C handle
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* @note This example shows a simple way to report end of DMA Rx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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#ifdef MASTER_BOARD
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void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *I2cHandle)
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{
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/* Toggle LED2: Transfer in reception process is correct */
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BSP_LED_Toggle(LED2);
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}
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#else
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void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *I2cHandle)
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{
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/* Toggle LED2: Transfer in reception process is correct */
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BSP_LED_Toggle(LED2);
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}
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#endif /* MASTER_BOARD */
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/**
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* @brief I2C error callbacks.
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* @param I2cHandle: I2C handle
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* @note This example shows a simple way to report transfer error, and you can
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* add your own implementation.
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* @retval None
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*/
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void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *I2cHandle)
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{
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/** Error_Handler() function is called when error occurs.
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* 1- When Slave doesn't acknowledge its address, Master restarts communication.
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* 2- When Master doesn't acknowledge the last data transferred, Slave doesn't care in this example.
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*/
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if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF)
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{
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/* Turn Off LED2 */
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BSP_LED_Off(LED2);
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/* Turn On LED3 */
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BSP_LED_On(LED3);
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}
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* Turn LED3 on */
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BSP_LED_On(LED3);
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while (1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* USER CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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Error_Handler();
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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