mirror of
https://github.com/STMicroelectronics/STM32CubeF0.git
synced 2025-05-03 22:17:10 +08:00
285 lines
8.9 KiB
C
285 lines
8.9 KiB
C
/**
|
||
******************************************************************************
|
||
* @file SPI/SPI_FullDuplex_ComIT/Src/main.c
|
||
* @author MCD Application Team
|
||
* @brief This sample code shows how to use STM32F0xx SPI HAL API to transmit
|
||
* and receive a data buffer with a communication process based on
|
||
* Interrupt transfer.
|
||
* The communication is done using 2 Boards.
|
||
******************************************************************************
|
||
* @attention
|
||
*
|
||
* Copyright (c) 2016 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.
|
||
*
|
||
******************************************************************************
|
||
*/
|
||
|
||
/* Includes ------------------------------------------------------------------*/
|
||
#include "main.h"
|
||
|
||
/** @addtogroup STM32F0xx_HAL_Examples
|
||
* @{
|
||
*/
|
||
|
||
/** @addtogroup SPI_FullDuplex_ComIT
|
||
* @{
|
||
*/
|
||
|
||
/* Private typedef -----------------------------------------------------------*/
|
||
/* Private define ------------------------------------------------------------*/
|
||
/* Private macro -------------------------------------------------------------*/
|
||
/* Uncomment this line to use the board as master, if not it is used as slave */
|
||
//#define MASTER_BOARD
|
||
|
||
/* Private variables ---------------------------------------------------------*/
|
||
/* SPI handler declaration */
|
||
SPI_HandleTypeDef SpiHandle;
|
||
|
||
/* Buffer used for transmission */
|
||
uint8_t aTxBuffer[] = "****SPI - Two Boards communication based on Interrupt **** SPI Message ******** SPI Message ******** SPI Message ****";
|
||
|
||
/* Buffer used for reception */
|
||
uint8_t aRxBuffer[BUFFERSIZE];
|
||
|
||
/* Private function prototypes -----------------------------------------------*/
|
||
void SystemClock_Config(void);
|
||
static void Error_Handler(void);
|
||
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
|
||
|
||
/* Private functions ---------------------------------------------------------*/
|
||
|
||
/**
|
||
* @brief Main program.
|
||
* @param None
|
||
* @retval None
|
||
*/
|
||
int main(void)
|
||
{
|
||
/* STM32F0xx 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.
|
||
- Low Level Initialization
|
||
*/
|
||
HAL_Init();
|
||
|
||
/* Configure LED2 */
|
||
BSP_LED_Init(LED2);
|
||
|
||
/* Configure the system clock to 48 MHz */
|
||
SystemClock_Config();
|
||
|
||
/*##-1- Configure the SPI peripheral #######################################*/
|
||
/* Set the SPI parameters */
|
||
SpiHandle.Instance = SPIx;
|
||
SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
|
||
SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
|
||
SpiHandle.Init.CLKPhase = SPI_PHASE_1EDGE;
|
||
SpiHandle.Init.CLKPolarity = SPI_POLARITY_LOW;
|
||
SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
|
||
SpiHandle.Init.CRCPolynomial = 7;
|
||
SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT;
|
||
SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
|
||
SpiHandle.Init.NSS = SPI_NSS_SOFT;
|
||
SpiHandle.Init.TIMode = SPI_TIMODE_DISABLE;
|
||
SpiHandle.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
|
||
SpiHandle.Init.CRCLength = SPI_CRC_LENGTH_8BIT;
|
||
|
||
#ifdef MASTER_BOARD
|
||
SpiHandle.Init.Mode = SPI_MODE_MASTER;
|
||
#else
|
||
SpiHandle.Init.Mode = SPI_MODE_SLAVE;
|
||
#endif /* MASTER_BOARD */
|
||
|
||
if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
|
||
{
|
||
/* Initialization Error */
|
||
Error_Handler();
|
||
}
|
||
|
||
#ifdef MASTER_BOARD
|
||
/* Configure User push-button */
|
||
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);
|
||
/* Wait for User push-button press before starting the Communication */
|
||
while (BSP_PB_GetState(BUTTON_USER) != GPIO_PIN_RESET)
|
||
{
|
||
BSP_LED_Toggle(LED2);
|
||
HAL_Delay(40);
|
||
}
|
||
BSP_LED_Off(LED2);
|
||
#endif /* MASTER_BOARD */
|
||
|
||
/*##-2- Start the Full Duplex Communication process ########################*/
|
||
/* While the SPI in TransmitReceive process, user can transmit data through
|
||
"aTxBuffer" buffer & receive data through "aRxBuffer" */
|
||
if(HAL_SPI_TransmitReceive_IT(&SpiHandle, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE) != HAL_OK)
|
||
{
|
||
/* Transfer error in transmission process */
|
||
Error_Handler();
|
||
}
|
||
|
||
/*##-3- Wait for the end of the transfer ###################################*/
|
||
/* Before starting a new communication transfer, you need to check the current
|
||
state of the peripheral; if it<69>s busy you need to wait for the end of current
|
||
transfer before starting a new one.
|
||
For simplicity reasons, this example is just waiting till the end of the
|
||
transfer, but application may perform other tasks while transfer operation
|
||
is ongoing. */
|
||
while (HAL_SPI_GetState(&SpiHandle) != HAL_SPI_STATE_READY)
|
||
{
|
||
}
|
||
|
||
/*##-4- Compare the sent and received buffers ##############################*/
|
||
if(Buffercmp((uint8_t*)aTxBuffer, (uint8_t*)aRxBuffer, BUFFERSIZE))
|
||
{
|
||
/* Processing Error */
|
||
Error_Handler();
|
||
}
|
||
|
||
/* Infinite loop */
|
||
while (1)
|
||
{
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief System Clock Configuration
|
||
* The system Clock is configured as follow :
|
||
* System Clock source = PLL (HSI)
|
||
* SYSCLK(Hz) = 48000000
|
||
* HCLK(Hz) = 48000000
|
||
* AHB Prescaler = 1
|
||
* APB1 Prescaler = 1
|
||
* HSI Frequency(Hz) = 8000000
|
||
* PREDIV = 2
|
||
* PLLMUL = 12
|
||
* Flash Latency(WS) = 1
|
||
* @param None
|
||
* @retval None
|
||
*/
|
||
void SystemClock_Config(void)
|
||
{
|
||
RCC_ClkInitTypeDef RCC_ClkInitStruct;
|
||
RCC_OscInitTypeDef RCC_OscInitStruct;
|
||
|
||
/* No HSE Oscillator on Nucleo, Activate PLL with HSI as source */
|
||
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
|
||
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
||
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
|
||
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
|
||
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
|
||
if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
|
||
{
|
||
/* Initialization Error */
|
||
while(1);
|
||
}
|
||
|
||
/* Select PLL as system clock source and configure the HCLK, PCLK1 clocks dividers */
|
||
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
|
||
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
|
||
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
||
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
||
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
|
||
{
|
||
/* Initialization Error */
|
||
while(1);
|
||
}
|
||
}
|
||
/**
|
||
* @brief TxRx Transfer completed callback.
|
||
* @param hspi: SPI handle
|
||
* @note This example shows a simple way to report end of Interrupt TxRx transfer, and
|
||
* you can add your own implementation.
|
||
* @retval None
|
||
*/
|
||
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi)
|
||
{
|
||
/* Turn LED on: Transfer in transmission/reception process is correct */
|
||
BSP_LED_On(LED2);
|
||
}
|
||
|
||
/**
|
||
* @brief SPI error callbacks.
|
||
* @param hspi: SPI handle
|
||
* @note This example shows a simple way to report transfer error, and you can
|
||
* add your own implementation.
|
||
* @retval None
|
||
*/
|
||
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi)
|
||
{
|
||
Error_Handler();
|
||
}
|
||
|
||
/**
|
||
* @brief This function is executed in case of error occurrence.
|
||
* @param None
|
||
* @retval None
|
||
*/
|
||
static void Error_Handler(void)
|
||
{
|
||
while(1)
|
||
{
|
||
/* Toggle LED2 */
|
||
BSP_LED_Toggle(LED2);
|
||
HAL_Delay(1000);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @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;
|
||
}
|
||
|
||
#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 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)
|
||
{
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/**
|
||
* @}
|
||
*/
|
||
|
||
/**
|
||
* @}
|
||
*/
|