452 lines
13 KiB
C
452 lines
13 KiB
C
/* USER CODE BEGIN Header */
|
|
/**
|
|
******************************************************************************
|
|
* @file : main.c
|
|
* @brief : Main program body
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* Copyright (c) 2020 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"
|
|
|
|
/* 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 ---------------------------------------------------------*/
|
|
UART_HandleTypeDef huart2;
|
|
DMA_HandleTypeDef hdma_usart2_rx;
|
|
|
|
/* USER CODE BEGIN PV */
|
|
/**
|
|
* @brief Text strings printed on PC Com port for user information
|
|
*/
|
|
uint8_t aTextInfoStart[] = "\r\nUSART Example : Enter characters to fill reception buffers.\r\n";
|
|
|
|
uint8_t aRXBufferUser[RX_BUFFER_SIZE];
|
|
|
|
/**
|
|
* @brief Data buffers used to manage received data in interrupt routine
|
|
*/
|
|
uint8_t aRXBufferA[RX_BUFFER_SIZE];
|
|
uint8_t aRXBufferB[RX_BUFFER_SIZE];
|
|
|
|
__IO uint32_t uwNbReceivedChars;
|
|
uint8_t *pBufferReadyForUser;
|
|
uint8_t *pBufferReadyForReception;
|
|
|
|
/* USER CODE END PV */
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
void SystemClock_Config(void);
|
|
static void MX_GPIO_Init(void);
|
|
static void MX_DMA_Init(void);
|
|
static void MX_USART2_UART_Init(void);
|
|
/* USER CODE BEGIN PFP */
|
|
void PrintInfo(UART_HandleTypeDef *huart, uint8_t *String, uint16_t Size);
|
|
void StartReception(void);
|
|
void UserDataTreatment(UART_HandleTypeDef *huart, uint8_t* pData, uint16_t Size);
|
|
|
|
/* 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 */
|
|
/* STM32WLxx HAL library initialization:
|
|
- Configure the Flash prefetch
|
|
- Systick timer is configured by default as source of time base, but user
|
|
can eventually implement his proper time base source (a general purpose
|
|
timer for example or other time source), keeping in mind that Time base
|
|
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
|
|
handled in milliseconds basis.
|
|
- Set NVIC Group Priority to 4
|
|
- Low Level Initialization
|
|
*/
|
|
/* 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_USART2_UART_Init();
|
|
/* USER CODE BEGIN 2 */
|
|
|
|
/* Initiate Continuous reception */
|
|
StartReception();
|
|
|
|
/* 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};
|
|
|
|
/** Configure the main internal regulator output voltage
|
|
*/
|
|
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
|
|
|
|
/** Initializes the CPU, AHB and APB buses clocks
|
|
*/
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
|
|
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
|
|
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
|
|
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
|
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
|
|
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
|
|
RCC_OscInitStruct.PLL.PLLN = 24;
|
|
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
|
|
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
|
|
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
|
|
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
|
|
*/
|
|
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|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;
|
|
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
|
|
|
|
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USART2 Initialization Function
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void MX_USART2_UART_Init(void)
|
|
{
|
|
|
|
/* USER CODE BEGIN USART2_Init 0 */
|
|
|
|
/* USER CODE END USART2_Init 0 */
|
|
|
|
/* USER CODE BEGIN USART2_Init 1 */
|
|
|
|
/* USER CODE END USART2_Init 1 */
|
|
huart2.Instance = USART2;
|
|
huart2.Init.BaudRate = 115200;
|
|
huart2.Init.WordLength = UART_WORDLENGTH_8B;
|
|
huart2.Init.StopBits = UART_STOPBITS_1;
|
|
huart2.Init.Parity = UART_PARITY_NONE;
|
|
huart2.Init.Mode = UART_MODE_TX_RX;
|
|
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
|
|
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
|
|
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
|
|
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
|
|
huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
|
|
if (HAL_UART_Init(&huart2) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/* USER CODE BEGIN USART2_Init 2 */
|
|
|
|
/* USER CODE END USART2_Init 2 */
|
|
|
|
}
|
|
|
|
/**
|
|
* Enable DMA controller clock
|
|
*/
|
|
static void MX_DMA_Init(void)
|
|
{
|
|
|
|
/* DMA controller clock enable */
|
|
__HAL_RCC_DMAMUX1_CLK_ENABLE();
|
|
__HAL_RCC_DMA1_CLK_ENABLE();
|
|
|
|
/* DMA interrupt init */
|
|
/* DMA1_Channel1_IRQn interrupt configuration */
|
|
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
|
|
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief GPIO Initialization Function
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void MX_GPIO_Init(void)
|
|
{
|
|
|
|
/* GPIO Ports Clock Enable */
|
|
__HAL_RCC_GPIOA_CLK_ENABLE();
|
|
|
|
}
|
|
|
|
/* USER CODE BEGIN 4 */
|
|
/**
|
|
* @brief Send Txt information message on UART Tx line (to PC Com port).
|
|
* @param huart UART handle.
|
|
* @param String String to be sent to user display
|
|
* @param Size Size of string
|
|
* @retval None
|
|
*/
|
|
void PrintInfo(UART_HandleTypeDef *huart, uint8_t *String, uint16_t Size)
|
|
{
|
|
if (HAL_OK != HAL_UART_Transmit(huart, String, Size, 100))
|
|
{
|
|
Error_Handler();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function prints user info on PC com port and initiates RX transfer
|
|
* @retval None
|
|
*/
|
|
void StartReception(void)
|
|
{
|
|
/* Initializes Buffer swap mechanism (used in User callback) :
|
|
- 2 physical buffers aRXBufferA and aRXBufferB (RX_BUFFER_SIZE length)
|
|
*/
|
|
pBufferReadyForReception = aRXBufferA;
|
|
pBufferReadyForUser = aRXBufferB;
|
|
uwNbReceivedChars = 0;
|
|
|
|
/* Print user info on PC com port */
|
|
PrintInfo(&huart2, aTextInfoStart, COUNTOF(aTextInfoStart));
|
|
|
|
/* Initializes Rx sequence using Reception To Idle event API.
|
|
As DMA channel associated to UART Rx is configured as Circular,
|
|
reception is endless.
|
|
If reception has to be stopped, call to HAL_UART_AbortReceive() could be used.
|
|
|
|
Use of HAL_UARTEx_ReceiveToIdle_DMA service, will generate calls to
|
|
user defined HAL_UARTEx_RxEventCallback callback for each occurrence of
|
|
following events :
|
|
- DMA RX Half Transfer event (HT)
|
|
- DMA RX Transfer Complete event (TC)
|
|
- IDLE event on UART Rx line (indicating a pause is UART reception flow)
|
|
*/
|
|
if (HAL_OK != HAL_UARTEx_ReceiveToIdle_DMA(&huart2, aRXBufferUser, RX_BUFFER_SIZE))
|
|
{
|
|
Error_Handler();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles buffer containing received data on PC com port
|
|
* @note In this example, received data are sent back on UART Tx (loopback)
|
|
* Any other processing such as copying received data in a larger buffer to make it
|
|
* available for application, could be implemented here.
|
|
* @note This routine is executed in Interrupt context.
|
|
* @param huart UART handle.
|
|
* @param pData Pointer on received data buffer to be processed
|
|
* @retval Size Nb of received characters available in buffer
|
|
*/
|
|
void UserDataTreatment(UART_HandleTypeDef *huart, uint8_t* pData, uint16_t Size)
|
|
{
|
|
/*
|
|
* This function might be called in any of the following interrupt contexts :
|
|
* - DMA TC and HT events
|
|
* - UART IDLE line event
|
|
*
|
|
* pData and Size defines the buffer where received data have been copied, in order to be processed.
|
|
* During this processing of already received data, reception is still ongoing.
|
|
*
|
|
*/
|
|
uint8_t* pBuff = pData;
|
|
uint8_t i;
|
|
|
|
/* Implementation of loopback is on purpose implemented in direct register access,
|
|
in order to be able to echo received characters as fast as they are received.
|
|
Wait for TC flag to be raised at end of transmit is then removed, only TXE is checked */
|
|
for (i = 0; i < Size; i++)
|
|
{
|
|
while (!(__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE))) {}
|
|
huart->Instance->TDR = *pBuff;
|
|
pBuff++;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief User implementation of the Reception Event Callback
|
|
* (Rx event notification called after use of advanced reception service).
|
|
* @param huart UART handle
|
|
* @param Size Number of data available in application reception buffer (indicates a position in
|
|
* reception buffer until which, data are available)
|
|
* @retval None
|
|
*/
|
|
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
|
|
{
|
|
static uint8_t old_pos = 0;
|
|
uint8_t *ptemp;
|
|
uint8_t i;
|
|
|
|
/* Check if number of received data in recpetion buffer has changed */
|
|
if (Size != old_pos)
|
|
{
|
|
/* Check if position of index in reception buffer has simply be increased
|
|
of if end of buffer has been reached */
|
|
if (Size > old_pos)
|
|
{
|
|
/* Current position is higher than previous one */
|
|
uwNbReceivedChars = Size - old_pos;
|
|
/* Copy received data in "User" buffer for evacuation */
|
|
for (i = 0; i < uwNbReceivedChars; i++)
|
|
{
|
|
pBufferReadyForUser[i] = aRXBufferUser[old_pos + i];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Current position is lower than previous one : end of buffer has been reached */
|
|
/* First copy data from current position till end of buffer */
|
|
uwNbReceivedChars = RX_BUFFER_SIZE - old_pos;
|
|
/* Copy received data in "User" buffer for evacuation */
|
|
for (i = 0; i < uwNbReceivedChars; i++)
|
|
{
|
|
pBufferReadyForUser[i] = aRXBufferUser[old_pos + i];
|
|
}
|
|
/* Check and continue with beginning of buffer */
|
|
if (Size > 0)
|
|
{
|
|
for (i = 0; i < Size; i++)
|
|
{
|
|
pBufferReadyForUser[uwNbReceivedChars + i] = aRXBufferUser[i];
|
|
}
|
|
uwNbReceivedChars += Size;
|
|
}
|
|
}
|
|
/* Process received data that has been extracted from Rx User buffer */
|
|
UserDataTreatment(huart, pBufferReadyForUser, uwNbReceivedChars);
|
|
|
|
/* Swap buffers for next bytes to be processed */
|
|
ptemp = pBufferReadyForUser;
|
|
pBufferReadyForUser = pBufferReadyForReception;
|
|
pBufferReadyForReception = ptemp;
|
|
}
|
|
/* Update old_pos as new reference of position in User Rx buffer that
|
|
indicates position to which data have been processed */
|
|
old_pos = Size;
|
|
|
|
}
|
|
|
|
|
|
/* 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 */
|
|
/* 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) */
|
|
|
|
/* Infinite loop */
|
|
while (1)
|
|
{
|
|
}
|
|
/* USER CODE END 6 */
|
|
}
|
|
#endif /* USE_FULL_ASSERT */
|