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STM32CubeWL/Projects/NUCLEO-WL55JC/Examples/USART/USART_SlaveMode/Src/main.c

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file USART/USART_SlaveMode/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use USART HAL API (USART instance)
* to set up a USART-SPI communication.
* Two boards are used, one configured as a SPI master and the second
* one configured as an USART slave.
******************************************************************************
* @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 */
#define SLAVE_BOARD
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;
USART_HandleTypeDef husart1;
/* USER CODE BEGIN PV */
__IO uint32_t UserButtonStatus = 0; /* set to 1 after User Button interrupt */
/* Buffer used for transmission */
uint8_t aTxBuffer[] = " **** USART_SlaveMode **** **** USART_SlaveMode **** **** USART_SlaveMode **** ";
/* Buffer used for reception */
uint8_t aRxBuffer[RXBUFFERSIZE];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART1_Init(void);
/* USER CODE BEGIN PFP */
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
/* 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 */
/* Initialize BSP LEDs */
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI1_Init();
MX_USART1_Init();
/* USER CODE BEGIN 2 */
#ifdef SLAVE_BOARD
/*##-1- Start the transmission/reception process ###########################*/
if(HAL_USART_TransmitReceive(&husart1, (uint8_t*)aTxBuffer, (uint8_t*)aRxBuffer, TXBUFFERSIZE, 0x1FFFFFF)!= HAL_OK)
{
Error_Handler();
}
#else
/*##-1- Configure the user button ##########################################*/
/* Configure User push-button in Interrupt mode */
BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
/* Wait for User push-button press before starting the Communication.
In the meantime, LED1 is blinking */
while(UserButtonStatus == 0)
{
/* Toggle LED1 */
BSP_LED_Toggle(LED1);
HAL_Delay(100);
}
BSP_LED_Off(LED1);
/*##-2- Start the transmission/reception process ###########################*/
if(HAL_SPI_TransmitReceive(&hspi1, (uint8_t*)aTxBuffer, (uint8_t*)aRxBuffer, TXBUFFERSIZE, 5000)!= HAL_OK)
{
Error_Handler();
}
#endif /* SLAVE_BOARD */
/*##-3- Compare the sent and received buffers ##############################*/
if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,RXBUFFERSIZE))
{
Error_Handler();
}
/* Turn on LED1 if test passes then enter infinite loop */
BSP_LED_On(LED1);
/* The SPI Master board receives the message and sends it back */
/* 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_8;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
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 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.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi1.Init.FirstBit = SPI_FIRSTBIT_LSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
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 USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
husart1.Instance = USART1;
husart1.Init.BaudRate = 9600;
husart1.Init.WordLength = USART_WORDLENGTH_8B;
husart1.Init.StopBits = USART_STOPBITS_1;
husart1.Init.Parity = USART_PARITY_NONE;
husart1.Init.Mode = USART_MODE_TX_RX;
husart1.Init.CLKPolarity = USART_POLARITY_LOW;
husart1.Init.CLKPhase = USART_PHASE_1EDGE;
husart1.Init.CLKLastBit = USART_LASTBIT_ENABLE;
husart1.Init.ClockPrescaler = USART_PRESCALER_DIV1;
husart1.SlaveMode = USART_SLAVEMODE_ENABLE;
if (HAL_USART_Init(&husart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_USARTEx_SetTxFifoThreshold(&husart1, USART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_USARTEx_SetRxFifoThreshold(&husart1, USART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_USARTEx_ConfigNSS(&husart1, USART_NSS_SOFT) != HAL_OK)
{
Error_Handler();
}
if (HAL_USARTEx_DisableFifoMode(&husart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_USARTEx_EnableSlaveMode(&husart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
/**
* @brief EXTI line detection callbacks
* @param GPIO_Pin: Specifies the pins connected EXTI line
* @retval None
*/
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == BUTTON_SW1_PIN)
{
UserButtonStatus = 1;
}
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval 0 : pBuffer1 identical to pBuffer2
* >0 : pBuffer1 differs from pBuffer2
*/
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if ((*pBuffer1) != *pBuffer2)
{
return BufferLength;
}
pBuffer1++;
pBuffer2++;
}
return 0;
}
/* 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 */
while(1)
{
/* LED3 is blinking */
BSP_LED_Toggle(LED3);
HAL_Delay(500);
}
/* 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 %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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