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Usart serial window viewer

Question asked by swan.francois on May 8, 2014
Hi, i have a STM32F3Discovery board and i am trying to communicate to a sim900 module. First i am trying to send data serially from the discovery to the computer using hyperterminal on windows 8. I am sending the char ch = 0x49 but on hyper terminal i am receiving the character "[".
upon opening my serial window uart1 i can not see anything in it while it is in debug mode and the code is running..is there something i have to specify within hardware or software maybe?


// STM32 USART1 (Tx PA.9, Rx PA.10) STM32F3 Discovery - sourcer32@gmail.com
 
#include "stm32f3_discovery.h"
 
//****************************************************************************
void Delay(__IO uint32_t nCount);
void RCC_Configuration(void)
{
  /* USART1 clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
 
  /* GPIOA clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
}
 
//****************************************************************************
 
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
 
  /* GPIO Configuration */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
 
  /* Connect USART pins to AF */
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_7);   // USART1_TX
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_7);  // USART1_RX
}
 
//****************************************************************************
 
void USART1_Configuration(void)
{
  USART_InitTypeDef USART_InitStructure;
 
  /* USARTx configuration ------------------------------------------------------*/
  /* USARTx configured as follow:
        - BaudRate = 9600 baud
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = 9600;
  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(USART1, &USART_InitStructure);
 
  USART_Cmd(USART1, ENABLE);
}
 
//****************************************************************************
 
int main(void)
{
  uint16_t ch;
 
  RCC_Configuration();
 
  GPIO_Configuration();
 
  USART1_Configuration();
 
  ch = 0x49; // 'I'
 
  while(1)
  {
    if (USART_GetFlagStatus(USART1, USART_FLAG_TXE) != RESET) // Check for Empty
        {    
            Delay(1000);
      USART_SendData(USART1, ch); // Send Character
        }
   
  }
 
  while(1); // Don't want to exit
}
 
void Delay(__IO uint32_t nCount) //in millisecond
{
  nCount = nCount * 5940 *2;//381;
  while(nCount--)
  {
  }
}
//****************************************************************************
 
#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

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