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usart and rs 232 problem

Question asked by wilczynski.andrzej on Apr 21, 2013
Latest reply on Apr 22, 2013 by wilczynski.andrzej
I have a problem ... I want to connect to the terminal via RS 232 converter usb .. code seems to be reasonable but still something is wrong, I can not send anything to the terminal please help.




#include "stm32f0xx.h"
#include "stm32f0xx_rcc.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_usart.h"
 
 
 
 
int main(void)
{
 
 
 
 
     USART_InitTypeDef USART_InitStructure;
      GPIO_InitTypeDef GPIO_InitStructure;
 
 
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
 
 
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
      //GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
 
 
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);
 
 
      //Configure USART2 pins:  Tx and Rx ----------------------------
      GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_2 | GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
      GPIO_Init(GPIOA, &GPIO_InitStructure);
 
 
      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(USART2, &USART_InitStructure);
 
 
      USART_Cmd(USART2,ENABLE);
 
 
 
 
      while(1)
      {
 
 
 
 
 
 
 
 
 
 
       while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET); // Wait for Empty
 
 
           USART_SendData(USART2, 0x49); // Send 'I'
      }
      return 0;
    }

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