541 lines
17 KiB
C
541 lines
17 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file I2C/I2C_TwoBoards_RestartComIT/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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* IT transfer and with a repeated start condition between the transmit
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* and receive process.
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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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/* USER CODE BEGIN PV */
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/* Buffer used for transmission */
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uint8_t aTxBuffer[] = " ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ";
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/* Buffer used for reception */
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uint8_t aRxBuffer[RXBUFFERSIZE];
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#ifndef MASTER_BOARD
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/* Variable used to trig an address match code event */
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__IO uint32_t uwTransferRequested = 0;
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#endif
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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_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_I2C1_Init();
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/* USER CODE BEGIN 2 */
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/* Configure LED2 */
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BSP_LED_Init(LED2);
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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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/* 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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/* 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_Seq_Transmit_IT(&hi2c1, (uint16_t)I2C_ADDRESS, (uint8_t*)aTxBuffer, TXBUFFERSIZE, I2C_FIRST_FRAME)!= 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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/* 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_Seq_Receive_IT(&hi2c1, (uint16_t)I2C_ADDRESS, (uint8_t *)aRxBuffer, RXBUFFERSIZE, I2C_LAST_FRAME) != 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 listen mode process ###########################*/
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if(HAL_I2C_EnableListen_IT(&hi2c1) != 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 Address Match Code event ######################################*/
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/* Before starting a transfer, you need to wait a Master request event.
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For simplicity reasons, this example is just waiting till an Address callback event,
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but application may perform other tasks while transfer operation is ongoing. */
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while(uwTransferRequested != 1)
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{
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}
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/*##- Put I2C peripheral in reception process ############################*/
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if(HAL_I2C_Slave_Seq_Receive_IT(&hi2c1, (uint8_t *)aRxBuffer, RXBUFFERSIZE, I2C_FIRST_FRAME) != 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_LISTEN)
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{
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}
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/*##- Wait Address Match Code event ######################################*/
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/* Before starting a transfer, you need to wait a Master request event.
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For simplicity reasons, this example is just waiting till an Address callback event,
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but application may perform other tasks while transfer operation is ongoing. */
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while(uwTransferRequested != 1)
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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_Seq_Transmit_IT(&hi2c1, (uint8_t*)aTxBuffer, TXBUFFERSIZE, I2C_LAST_FRAME)!= 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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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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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, 0) != 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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* @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 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 IT 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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/* Turn LED2 on: Transfer in transmission process is correct */
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BSP_LED_On(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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/* Reset address match code event */
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uwTransferRequested = 0;
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/* Turn LED2 off: Transfer in transmission process is correct */
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BSP_LED_Off(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 IT 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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/* Turn LED2 off: Transfer in reception process is correct */
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BSP_LED_Off(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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/* Reset address match code event */
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uwTransferRequested = 0;
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/* Turn LED2 on: Transfer in reception process is correct */
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BSP_LED_On(LED2);
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}
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#endif /* MASTER_BOARD */
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#ifndef MASTER_BOARD
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/**
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* @brief Slave Address Match callback.
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* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for the specified I2C.
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* @param TransferDirection: Master request Transfer Direction (Write/Read), value of @ref I2C_XferOptions_definition
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* @param AddrMatchCode: Address Match Code
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* @retval None
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*/
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void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode)
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{
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uwTransferRequested = 1;
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}
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/**
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* @brief Listen Complete callback.
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* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
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* the configuration information for the specified I2C.
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* @retval None
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*/
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void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)
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{
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}
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#endif
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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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Error_Handler();
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}
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}
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|
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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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*/
|
|
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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|
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return 0;
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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.
|
|
* @retval None
|
|
*/
|
|
void Error_Handler(void)
|
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{
|
|
/* USER CODE BEGIN Error_Handler_Debug */
|
|
/* User can add his own implementation to report the HAL error return state */
|
|
/* Turn LED3 on */
|
|
BSP_LED_On(LED3);
|
|
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 %d\r\n", file, line) */
|
|
Error_Handler();
|
|
/* USER CODE END 6 */
|
|
}
|
|
#endif /* USE_FULL_ASSERT */
|