mirror of
https://github.com/STMicroelectronics/STM32CubeF0.git
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291 lines
8.7 KiB
C
291 lines
8.7 KiB
C
/**
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******************************************************************************
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* @file SPI/SPI_FullDuplex_ComPolling/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F0xx SPI HAL API to transmit
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* and receive a data buffer with a communication process based on
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* Polling 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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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F0xx_HAL_Examples
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* @{
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*/
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/** @addtogroup SPI_FullDuplex_ComPolling
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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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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/* Private variables ---------------------------------------------------------*/
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/* SPI handler declaration */
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SPI_HandleTypeDef SpiHandle;
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/* Buffer used for transmission */
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uint8_t aTxBuffer[] = "****SPI - Two Boards communication based on Polling **** SPI Message ******** SPI Message ******** SPI Message ****";
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/* Buffer used for reception */
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uint8_t aRxBuffer[BUFFERSIZE];
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void Error_Handler(void);
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static void Timeout_Error_Handler(void);
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static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program.
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F0xx 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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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 48 MHz */
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SystemClock_Config();
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/* Configure LED3 and LED4 */
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BSP_LED_Init(LED3);
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BSP_LED_Init(LED4);
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/*##-1- Configure the SPI peripheral #######################################*/
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/* Set the SPI parameters */
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SpiHandle.Instance = SPIx;
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SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
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SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
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SpiHandle.Init.CLKPhase = SPI_PHASE_1EDGE;
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SpiHandle.Init.CLKPolarity = SPI_POLARITY_LOW;
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SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT;
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SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
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SpiHandle.Init.TIMode = SPI_TIMODE_DISABLE;
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SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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SpiHandle.Init.CRCPolynomial = 7;
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SpiHandle.Init.CRCLength = SPI_CRC_LENGTH_8BIT;
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SpiHandle.Init.NSS = SPI_NSS_SOFT;
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SpiHandle.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
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#ifdef MASTER_BOARD
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SpiHandle.Init.Mode = SPI_MODE_MASTER;
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#else
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SpiHandle.Init.Mode = SPI_MODE_SLAVE;
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#endif /* MASTER_BOARD */
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if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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#ifdef MASTER_BOARD
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/* Configure User push-button button */
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BSP_PB_Init(BUTTON_USER,BUTTON_MODE_GPIO);
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/* Wait for User push-button press before starting the Communication */
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while (BSP_PB_GetState(BUTTON_USER) != GPIO_PIN_SET)
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{
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BSP_LED_Toggle(LED3);
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HAL_Delay(100);
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}
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BSP_LED_Off(LED3);
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#endif /* MASTER_BOARD */
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/*##-2- Start the Full Duplex Communication process ########################*/
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/* While the SPI in TransmitReceive process, user can transmit data through
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"aTxBuffer" buffer & receive data through "aRxBuffer" */
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/* Timeout is set to 5S */
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switch(HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE, 5000))
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{
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case HAL_OK:
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/* Communication is completed ___________________________________________ */
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/* Compare the sent and received buffers */
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if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE))
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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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/* Turn LED3 on: Transfer in transmission/Reception process is correct */
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BSP_LED_On(LED3);
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break;
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case HAL_TIMEOUT:
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/* A Timeout Occur ______________________________________________________*/
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/* Call Timeout Handler */
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Timeout_Error_Handler();
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break;
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/* An Error Occur ______________________________________________________ */
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case HAL_ERROR:
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/* Call Timeout Handler */
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Error_Handler();
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break;
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default:
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break;
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}
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED4 on */
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BSP_LED_On(LED4);
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while(1)
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{
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Timeout_Error_Handler(void)
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{
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/* Toggle LED4 on */
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while(1)
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{
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BSP_LED_On(LED4);
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HAL_Delay(500);
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BSP_LED_Off(LED4);
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HAL_Delay(500);
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSI/2)
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* SYSCLK(Hz) = 48000000
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* HCLK(Hz) = 48000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 1
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* HSI Frequency(Hz) = 8000000
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* PREDIV = 1
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* PLLMUL = 12
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* Flash Latency(WS) = 1
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* @param None
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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_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* No HSE Oscillator on Nucleo, Activate PLL with HSI/2 as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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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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*/
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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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#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 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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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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