/**
******************************************************************************
* @file USART/Synchronous/main.c
* @author MCD Application Team
* @version V3.5.0
* @date 08-April-2011
* @brief Main program body
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
*
© COPYRIGHT 2011 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "platform_config.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup USART_Synchronous
* @{
*/
/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
/* Private define ------------------------------------------------------------*/
#define TxBufferSize1 (countof(TxBuffer1) - 1)
#define TxBufferSize2 (countof(TxBuffer2) - 1)
#define DYMMY_BYTE 0x00
/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
uint8_t TxBuffer1[] = "USART Synchronous Example: USARTy -> SPIy using TXE and RXNE Flags";
uint8_t TxBuffer2[] = "USART Synchronous Example: SPIy -> USARTy using TXE and RXNE Flags";
uint8_t RxBuffer1[TxBufferSize2];
uint8_t RxBuffer2[TxBufferSize1];
__IO uint8_t NbrOfDataToRead1 = TxBufferSize2;
__IO uint8_t NbrOfDataToRead2 = TxBufferSize1;
__IO uint8_t TxCounter1 = 0, RxCounter1 = 0;
__IO uint8_t TxCounter2 = 0, RxCounter2 = 0;
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void SPI_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer1, 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
file (startup_stm32f10x_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f10x.c file
*/
/* System Clocks Configuration */
RCC_Configuration();
/* Configure the GPIO ports */
GPIO_Configuration();
/* Configure the SPI */
SPI_Configuration();
/* USARTy configuration ------------------------------------------------------*/
/* USARTy configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
- USART Clock Enabled
- USART CPOL: Clock is active High
- USART CPHA: Data is captured on the second edge
- USART LastBit: The clock pulse of the last data bit is output to
the SCLK pin
*/
USART_ClockInitStructure.USART_Clock = USART_Clock_Enable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Enable;
USART_ClockInit(USARTy, &USART_ClockInitStructure);
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USARTy, &USART_InitStructure);
/* Configure the USARTy */
USART_Init(USARTy, &USART_InitStructure);
/* Enable the USARTy */
USART_Cmd(USARTy, ENABLE);
while(NbrOfDataToRead2--)
{
/* Write one byte in the USARTy Transmit Data Register */
USART_SendData(USARTy, TxBuffer1[TxCounter1++]);
/* Wait until end of transmit */
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET)
{
}
/* Wait the byte is entirely received by SPIy */
while(SPI_I2S_GetFlagStatus(SPIy, SPI_I2S_FLAG_RXNE) == RESET)
{
}
/* Store the received byte in the RxBuffer2 */
RxBuffer2[RxCounter2++] = SPI_I2S_ReceiveData(SPIy);
}
/* Clear the USARTy Data Register */
USART_ReceiveData(USARTy);
while(NbrOfDataToRead1--)
{
/* Wait until end of transmit */
while(SPI_I2S_GetFlagStatus(SPIy, SPI_I2S_FLAG_TXE)== RESET)
{
}
/* Write one byte in the SPIy Transmit Data Register */
SPI_I2S_SendData(SPIy, TxBuffer2[TxCounter2++]);
/* Send a Dummy byte to generate clock to slave */
USART_SendData(USARTy, DYMMY_BYTE);
/* Wait until end of transmit */
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET)
{
}
/* Wait the byte is entirely received by USARTy */
while(USART_GetFlagStatus(USARTy, USART_FLAG_RXNE) == RESET)
{
}
/* Store the received byte in the RxBuffer1 */
RxBuffer1[RxCounter1++] = USART_ReceiveData(USARTy);
}
/* Check the received data with the send ones */
TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
/* TransferStatus = PASSED, if the data transmitted from USARTy and
received by SPIy are the same */
/* TransferStatus = FAILED, if the data transmitted from USARTy and
received by SPIy are different */
TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
/* TransferStatus = PASSED, if the data transmitted from SPIy and
received by USARTy are the same */
/* TransferStatus = FAILED, if the data transmitted from SPIy and
received by USARTy are different */
while (1)
{
}
}
/**
* @brief Configures the different system clocks.
* @param None
* @retval None
*/
void RCC_Configuration(void)
{
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | SPIy_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
/* Enable USARTy Clock */
RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
/* Enable SPIy Clock */
RCC_APB2PeriphClockCmd(SPIy_CLK, ENABLE);
}
/**
* @brief Configures the different GPIO ports.
* @param None
* @retval None
*/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure USARTy TX and USARTy CK pins as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = USARTy_TxPin | USARTy_ClkPin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
/* Configure SPI1 pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = SPIy_SCKPin | SPIy_MISOPin | SPIy_MOSIPin;
GPIO_Init(SPIy_GPIO, &GPIO_InitStructure);
/* Configure USARTy RX as input floating */
GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
}
/**
* @brief Configures the SPI.
* @param None
* @retval None
*/
void SPI_Configuration(void)
{
SPI_InitTypeDef SPI_InitStructure;
SPI_StructInit(&SPI_InitStructure);
SPI_I2S_DeInit(SPIy);
/* SPIy Config */
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
/* Configure SPIy */
SPI_Init(SPIy, &SPI_InitStructure);
/* SPIy enable */
SPI_Cmd(SPIy, ENABLE);
}
/**
* @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
*/
TestStatus Buffercmp(uint8_t* pBuffer1, 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 2011 STMicroelectronics *****END OF FILE****/