Usart serial window viewer

[francois]

Posted on May 08, 2014 at 09:34

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