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/**
******************************************************************************
* @file SPI/SPI_TwoBoards/SPI_DataExchangeDMA/main.c
* @author MCD Application Team
* @version V1.1.0
* @date 18-January-2013
* @brief Main program body
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* [url]http://www.st.com/software_license_agreement_liberty_v2[/url]
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_StdPeriph_Examples
* @{
*/
/** @addtogroup SPI_DataExchangeDMA
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint8_t aTxBuffer[BUFFERSIZE] = "SPI Master/Slave : Communication between two SPI using DMA";
__IO uint8_t aRxBuffer [BUFFERSIZE];
__IO uint8_t ubRxIndex = 0;
__IO uint8_t ubTxIndex = 0;
__IO uint32_t TimeOut = 0;
SPI_InitTypeDef SPI_InitStructure;
/* Private function prototypes -----------------------------------------------*/
static void SPI_Config(void);
static void SysTickConfig(void);
static TestStatus Buffercmp(uint8_t* pBuffer1, __IO uint8_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
files (startup_stm32f40xx.s/startup_stm32f427x.s) before to branch to
application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
/* SPI configuration */
SPI_Config();
/* SysTick configuration */
SysTickConfig();
/* LEDs configuration */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
#ifdef SPI_MASTER
/* Master board configuration */
/* Initializes the SPI communication */
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_Init(SPIx, &SPI_InitStructure);
/* The Data transfer is performed in the SPI using Direct Memory Access */
/* Enable DMA SPI TX Stream */
DMA_Cmd(SPIx_TX_DMA_STREAM,ENABLE);
/* Enable DMA SPI RX Stream */
DMA_Cmd(SPIx_RX_DMA_STREAM,ENABLE);
/* Enable SPI DMA TX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable SPI DMA RX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
/* Configure the Tamper Button */
STM_EVAL_PBInit(BUTTON_TAMPER,BUTTON_MODE_GPIO);
/* Wait until Tamper Button is pressed */
while (STM_EVAL_PBGetState(BUTTON_TAMPER));
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
#endif /* SPI_MASTER */
#ifdef SPI_SLAVE
/* Slave board configuration */
/* Initializes the SPI communication */
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_Init(SPIx, &SPI_InitStructure);
/* Enable DMA SPI TX Stream */
DMA_Cmd(SPIx_TX_DMA_STREAM,ENABLE);
/* Enable DMA SPI RX Stream */
DMA_Cmd(SPIx_RX_DMA_STREAM,ENABLE);
/* Enable SPI DMA TX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable SPI DMA RX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, ENABLE);
/* Enable the SPI peripheral */
SPI_Cmd(SPIx, ENABLE);
#endif /* SPI_SLAVE */
/* Waiting the end of Data transfer */
while (DMA_GetFlagStatus(SPIx_TX_DMA_STREAM,SPIx_TX_DMA_FLAG_TCIF)==RESET);
while (DMA_GetFlagStatus(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF)==RESET);
/* Clear DMA Transfer Complete Flags */
DMA_ClearFlag(SPIx_TX_DMA_STREAM,SPIx_TX_DMA_FLAG_TCIF);
DMA_ClearFlag(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF);
/* Disable DMA SPI TX Stream */
DMA_Cmd(SPIx_TX_DMA_STREAM,DISABLE);
/* Disable DMA SPI RX Stream */
DMA_Cmd(SPIx_RX_DMA_STREAM,DISABLE);
/* Disable SPI DMA TX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Tx, DISABLE);
/* Disable SPI DMA RX Requsts */
SPI_I2S_DMACmd(SPIx, SPI_I2S_DMAReq_Rx, DISABLE);
/* Disable the SPI peripheral */
SPI_Cmd(SPIx, DISABLE);
if (Buffercmp(aTxBuffer, aRxBuffer, BUFFERSIZE) != FAILED)
{
/* Turn ON LED1 and LED3 */
STM_EVAL_LEDOn(LED1);
STM_EVAL_LEDOn(LED3);
/* Turn OFF LED2 and LED4 */
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED4);
}
else
{
/* Turn OFF LED1 and LED3 */
STM_EVAL_LEDOff(LED1);
STM_EVAL_LEDOff(LED3);
/* Turn ON LED2 and LED4 */
STM_EVAL_LEDOn(LED2);
STM_EVAL_LEDOn(LED4);
}
/* Infinite Loop */
while (1)
{
}
}
/**
* @brief Configures the SPI Peripheral.
* @param None
* @retval None
*/
static void SPI_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* Peripheral Clock Enable -------------------------------------------------*/
/* Enable the SPI clock */
SPIx_CLK_INIT(SPIx_CLK, ENABLE);
/* Enable GPIO clocks */
RCC_AHB1PeriphClockCmd(SPIx_SCK_GPIO_CLK | SPIx_MISO_GPIO_CLK | SPIx_MOSI_GPIO_CLK, ENABLE);
/* Enable DMA clock */
RCC_AHB1PeriphClockCmd(SPIx_DMA_CLK, ENABLE);
/* SPI GPIO Configuration --------------------------------------------------*/
/* GPIO Deinitialisation */
GPIO_DeInit(SPIx_SCK_GPIO_PORT);
GPIO_DeInit(SPIx_MISO_GPIO_PORT);
GPIO_DeInit(SPIx_MOSI_GPIO_PORT);
/* Connect SPI pins to AF5 */
GPIO_PinAFConfig(SPIx_SCK_GPIO_PORT, SPIx_SCK_SOURCE, SPIx_SCK_AF);
GPIO_PinAFConfig(SPIx_MISO_GPIO_PORT, SPIx_MISO_SOURCE, SPIx_MISO_AF);
GPIO_PinAFConfig(SPIx_MOSI_GPIO_PORT, SPIx_MOSI_SOURCE, SPIx_MOSI_AF);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
/* SPI SCK pin configuration */
GPIO_InitStructure.GPIO_Pin = SPIx_SCK_PIN;
GPIO_Init(SPIx_SCK_GPIO_PORT, &GPIO_InitStructure);
/* SPI MISO pin configuration */
GPIO_InitStructure.GPIO_Pin = SPIx_MISO_PIN;
GPIO_Init(SPIx_MISO_GPIO_PORT, &GPIO_InitStructure);
/* SPI MOSI pin configuration */
GPIO_InitStructure.GPIO_Pin = SPIx_MOSI_PIN;
GPIO_Init(SPIx_MOSI_GPIO_PORT, &GPIO_InitStructure);
/* SPI configuration -------------------------------------------------------*/
SPI_I2S_DeInit(SPIx);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
/* DMA configuration -------------------------------------------------------*/
/* Deinitialize DMA Streams */
DMA_DeInit(SPIx_TX_DMA_STREAM);
DMA_DeInit(SPIx_RX_DMA_STREAM);
/* Configure DMA Initialization Structure */
DMA_InitStructure.DMA_BufferSize = BUFFERSIZE ;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable ;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull ;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single ;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t) (&(SPIx->DR)) ;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
/* Configure TX DMA */
DMA_InitStructure.DMA_Channel = SPIx_TX_DMA_CHANNEL ;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral ;
DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)aTxBuffer ;
DMA_Init(SPIx_TX_DMA_STREAM, &DMA_InitStructure);
/* Configure RX DMA */
DMA_InitStructure.DMA_Channel = SPIx_RX_DMA_CHANNEL ;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory ;
DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)aRxBuffer ;
DMA_Init(SPIx_RX_DMA_STREAM, &DMA_InitStructure);
}
/**
* @brief Configure a SysTick Base time to 10 ms.
* @param None
* @retval None
*/
static void SysTickConfig(void)
{
/* Setup SysTick Timer for 10ms interrupts */
if (SysTick_Config(SystemCoreClock / 100))
{
/* Capture error */
while (1);
}
/* Configure the SysTick handler priority */
NVIC_SetPriority(SysTick_IRQn, 0x0);
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval PASSED: pBuffer1 identical to pBuffer2
* FAILED: pBuffer1 differs from pBuffer2
*/
static TestStatus Buffercmp(uint8_t* pBuffer1, __IO uint8_t* pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if (*pBuffer1 != *pBuffer2)
{
return FAILED;
}
pBuffer1++;
pBuffer2++;
}
return PASSED;
}
#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
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
发表于 2024-9-16 08:45:45
发表于 2024-9-16 10:51:21
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