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https://github.com/STMicroelectronics/STM32CubeF3.git
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350 lines
11 KiB
C
350 lines
11 KiB
C
/**
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******************************************************************************
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* @file SPI/SPI_HalfDuplex_ComPolling/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F3xx 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) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 STM32F3xx_HAL_Examples
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* @{
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*/
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/** @addtogroup SPI_HalfDuplex_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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/* HalfDuplex communication direction */
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#define RX 0
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#define TX 1
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/* Private macro -------------------------------------------------------------*/
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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 Half Duplex communication based on Polling **** SPI Message ******** ";
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/* Buffer used for reception */
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uint8_t aRxBuffer[BUFFERSIZE];
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/* Transmission status */
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HAL_StatusTypeDef Errorcode = HAL_OK;
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/* Private function prototypes -----------------------------------------------*/
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static 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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static void Check_Error (HAL_StatusTypeDef Errorcode, uint8_t Direction);
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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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/* STM32F3xx HAL library initialization:
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- Configure the Flash prefetch
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- Configure the Systick to generate an interrupt each 1 msec
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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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HAL_Init();
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/* Configure the system clock to 64 MHz */
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SystemClock_Config();
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/* Configure LED1, LED2 and LED3 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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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_1LINE;
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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 */
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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(LED1);
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HAL_Delay(100);
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}
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BSP_LED_Off(LED1);
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/*##-2- MASTER : Start the Half Duplex Communication : TX ########################*/
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/* Timeout is set to 5 seconds */
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Errorcode = HAL_SPI_Transmit(&SpiHandle, (uint8_t*)aTxBuffer, BUFFERSIZE, 5000);
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Check_Error(Errorcode, TX);
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HAL_Delay(2000);
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/*##-3- MASTER : Start the Half Duplex Communication : RX ########################*/
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/* Timeout is set to 5 seconds */
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/* Disable SPI before changing direction */
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__HAL_SPI_DISABLE(&SpiHandle);
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Errorcode = HAL_SPI_Receive(&SpiHandle, (uint8_t*)aRxBuffer, BUFFERSIZE, 5000);
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Check_Error(Errorcode, RX);
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#else /* SLAVE_BOARD */
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/*##-2- SLAVE : Start the Half Duplex Communication : RX ########################*/
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/* Timeout is set to 60 seconds to wait Push-Button press */
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Errorcode = HAL_SPI_Receive(&SpiHandle, (uint8_t*)aRxBuffer, BUFFERSIZE, 60000);
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Check_Error(Errorcode, RX);
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/*##-3- SLAVE : Start the Half Duplex Communication : TX ########################*/
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/* Timeout is set to 5 seconds */
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/* Disable SPI before changing direction */
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/* Transmission of the received buffer */
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__HAL_SPI_DISABLE(&SpiHandle);
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Errorcode = HAL_SPI_Transmit(&SpiHandle, (uint8_t*)aRxBuffer, BUFFERSIZE, 5000);
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Check_Error(Errorcode, TX);
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#endif
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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 to test the transmission status
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* @param None
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* @retval None
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*/
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static void Check_Error (HAL_StatusTypeDef Errorcode, uint8_t Direction)
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{
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switch(Errorcode)
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{
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case HAL_OK:
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if (Direction == TX)
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{
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/* Turn LED1 on: Transmission complete */
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BSP_LED_On(LED1);
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}
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else
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{
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if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE))
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{
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/* Turn LED3 on : Transfer error in transmission process */
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Error_Handler();
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}
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else
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{
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/* Turn LED2 on: Reception complete */
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BSP_LED_On(LED2);
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}
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}
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break;
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case HAL_TIMEOUT:
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/* Toggle LED3 : A timeout occur */
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Timeout_Error_Handler();
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break;
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case HAL_ERROR:
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/* Toggle LED3 on : An error occur */
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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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}
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/**
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* @brief This function is executed in case of timeout.
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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 LED3 */
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while(1)
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{
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BSP_LED_Toggle(LED3);
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HAL_Delay(500);
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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 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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* @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 System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSI)
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* SYSCLK(Hz) = 64000000
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* HCLK(Hz) = 64000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* HSI Frequency(Hz) = 8000000
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* PREDIV = RCC_PREDIV_DIV2 (2)
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* PLLMUL = RCC_PLL_MUL16 (16)
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* Flash Latency(WS) = 2
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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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/* HSI Oscillator already ON after system reset, activate PLL with HSI 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_DIV2;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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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 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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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_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= 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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#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(char* 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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