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stm32F100 RX

khaled3310
Associate II

‎2012-03-20 09:28 AM

Posted on March 20, 2012 at 17:28

hi can any one help me this code seems to be right but i dont know what' the matter with Rx FAILED LED turn always on !!!???

#include ''stm32f10x.h''

#include ''stm32f10x_rcc.h''

#include ''stm32f10x_usart.h''

#include ''stm32f10x_gpio.h''

uint8_t ch;

// pour USART1 PA9 et PA10, pour USART2 PA2 et PA3

#define  RCC_APB2Periph_GPIOx     RCC_APB2Periph_GPIOA

#define  GPIO_Pin_Tx1               GPIO_Pin_9   // PA9  sortie

#define  GPIO_Pin_Rx1               GPIO_Pin_10    // PA10 entree

#define  GPIO_Pin_Tx2               GPIO_Pin_2  // PA2 sortie

#define  GPIO_Pin_Rx2               GPIO_Pin_3    // PA3 entree

typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;

#define countof(a)   (sizeof(a) / sizeof(*(a)))

#define TxBufferSize   countof(TxBuffer)

GPIO_InitTypeDef GPIO_InitStructure;

TestStatus TransferStatus = FAILED;  

ErrorStatus HSEStartUpStatus;

/* Private variables ---------------------------------------------------------*/

USART_InitTypeDef USART_InitStructure;

u8 TxBuffer[] = ''a1a34  ceci est un essai'';

u8 RxBuffer[TxBufferSize];

u8 TxCounter = 0, RxCounter = 0;  

 

/* Private function prototypes -----------------------------------------------*/

void RCC_Configuration(void);  // configuration horloge PortA et horloge Usart

void GPIO_Configuration(void); // configuration pattes entrees/sorties

void NVIC_Configuration(void);  // configuration interruption (ici non utilisee)

TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);

//u8 index = 0;

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

#ifdef USE_STM3210B_EVAL

  /* Enable the USARTx Pins Software Remapping */

  GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);

  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);

#endif

  /* Configure USART1 Tx (PA.09) as alternate function push-pull */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Tx1;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_Init(GPIOA, &GPIO_InitStructure);   // Tx USART1 en sortie push pull

  /* Configure led as alternate function push-pull */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_8;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_Init(GPIOC, &GPIO_InitStructure);   

  /* Configure USART2 Tx as alternate function push-pull */

  

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Tx1;

 //PIO_Init(GPIOA, &GPIO_InitStructure);  // configurer Tx USART2 en sortie push pull

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART1 Rx (PA.10) as input floating */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Rx1;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOA, &GPIO_InitStructure);   // configurer Rx USART1 en entree flottante

  /* Configure USART2 Rx as input floating */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Rx2;

  GPIO_Init(GPIOA, &GPIO_InitStructure);  // configurer Rx USART2 en entree flottante

}

TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength)

{

  while(BufferLength--)

  {

    if(*pBuffer1 != *pBuffer2)

    {

      return FAILED;

    }

    

    pBuffer1++;

    pBuffer2++;

  }

  return PASSED;  

}

int main(void)

{

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  // autorise GPIO

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);   // autorise USART1

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);   // autorise USART2

 SystemInit(); // initialiser horloge et PLLMUL systeme et USART   //  

 GPIO_Configuration();  // configuration GPIO 

 USART_InitStructure.USART_BaudRate = 115200;    // configuration vitesse

  USART_InitStructure.USART_WordLength = USART_WordLength_8b; // configuration longueur mot

  USART_InitStructure.USART_StopBits = USART_StopBits_1;  // bit de stop

  USART_InitStructure.USART_Parity = USART_Parity_No;  // bit de parite

  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; // hardware control

  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; // half duplex

        

  /* Configure USART1 */

  USART_Init(USART1, &USART_InitStructure); // initialisation registres internes (SR et BRR) USART1

  /* Configure USART2 */

  USART_Init(USART2, &USART_InitStructure);  // initialisation registres internes (SR et BRR) USART2

 

  USART_Cmd(USART1, ENABLE); // autoriser USART1 a fonctionner

  /* Enable the USART2 */

  USART_Cmd(USART2, ENABLE);  // autoriser USART2 a fonctionner

 

while(TxCounter < TxBufferSize)

 {   

    /* envoyer un caractere de USART1 a USART2 */

 ch=TxBuffer[TxCounter++];

 if (ch=='c'){GPIO_SetBits(GPIOC,GPIO_Pin_9);}

while (!(USART1->SR & USART_FLAG_TXE));   // tester si registre a decalge vide (Bit TXE) registre SR

USART1->DR = ch;   // envoyer caractere pareil que USART_SendData(USART1, TxBuffer[TxCounter++]);

// USART1->DR = (ch1 & (uint16_t)0x01FF);

  

while(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET)

    {

    }

    /* Store the received byte in RxBuffer */

    RxBuffer[RxCounter++] = (USART_ReceiveData(USART2) & 0x7F); // why we must ''&'' the received value with 0x7F!!!!!  

      if (RxBuffer[RxCounter -1]=='c'){GPIO_SetBits(GPIOC,GPIO_Pin_8);}

  } 

  /* Check the received data with the send ones */ 

   TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxBufferSize);

  if (TransferStatus== PASSED)

   {GPIO_SetBits(GPIOC,GPIO_Pin_8); }

   }

 

// si le contenu des deux buffers de reception et d'emission sont identiques c'est que 

//la communication entre port serie 1USART1 et port serie 2 USART1 s'est bien faite: PASS = 1, Failed = 0    

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2 REPLIES 2
Tesla DeLorean
Guru

‎2012-03-21 07:10 AM

Posted on March 21, 2012 at 15:10

I don't have the time to fully analyze this, but the GPIO configuration is definitely broken.

Try this: 

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Tx1;
GPIO_Init(GPIOA, &GPIO_InitStructure); // Tx USART1 en sortie push pull
/* Configure USART2 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Tx2;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Rx1;
GPIO_Init(GPIOA, &GPIO_InitStructure); // configurer Rx USART1 en entree flottante
/* Configure USART2 Rx as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Rx2;
GPIO_Init(GPIOA, &GPIO_InitStructure); // configurer Rx USART2 en entree flottante
/* Configure led as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure); 
}

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khaled3310
Associate II

‎2012-04-10 03:15 AM

Posted on April 10, 2012 at 12:15

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