Nucleo-F103RB and USART2

[lemac]

Posted on July 02, 2014 at 13:23

Hello

I was buy recently a Nucleo-F103RB I downloaded the libraries from ST stsw-stm32143 I am trying modify the code of ''IO_Toggle'' for send data to the PC thougt USART 2 and the USB connexion. But I don't know because don't arrive nothing to PC. I put a Oscilloscope in TX PIN and there are no data in this pin. I was looking for examples code and every body make code similar to me. Can someone help me? Thanks I show you the main.c code

/* Includes ------------------------------------------------------------------*/
#include ''main.h''
#define REGION
/** @addtogroup IO_Toggle
* @{
*/ 
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static __IO uint32_t TimingDelay;
uint8_t __IO BlinkSpeed = 0;
/* Private function prototypes -----------------------------------------------*/
RCC_ClocksTypeDef RCC_Clocks;
/* Private functions ---------------------------------------------------------*/
int main(void)
{
/** USART2 GPIO Configuration 
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
/****************************************************************************/
GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART2_InitStruct;
/****************************************************************************/
/*Enable or disable APB2 peripheral clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/*Configure GPIO pin : PA */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pin : PA */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStruct);
/****************************************************************************/
/* USART_InitStruct members default value */
USART2_InitStruct.USART_BaudRate = 9600;
USART2_InitStruct.USART_WordLength = USART_WordLength_8b;
USART2_InitStruct.USART_StopBits = USART_StopBits_1;
USART2_InitStruct.USART_Parity = USART_Parity_No ;
USART2_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART2_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None; 
USART_DeInit(USART2);
USART_Init(USART2, &USART2_InitStruct);
//USART_StructInit(USART2_InitStruct); 
//USART_ClockInitTypeDef *USART2_ClockInitStruct;
//USART_ClockStructInit (USART2_ClockInitStruct);
//USART_Init(USART2, USART2_InitStruct); 
//USART_ClockInit(USART2, USART2_ClockInitStruct);
USART_Cmd(USART2, ENABLE); 
/****************************************************************************/

/*!< At this stage the microcontroller clock setting is already configured, 
this is done through SystemInit() function which is called from startup
file (startup_stm32f10x_md.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f10x.c file
*/ 
/* SysTick end of count event each 1ms */
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
/* Initialize LED2 */
STM_EVAL_LEDInit(LED2);
/* Initialize User_Button on STM32NUCLEO */
STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI); 
/* Initiate Blink Speed variable */ 
BlinkSpeed = 0;
/****************************************************************************/
/* Infinite loop */
while (1)
{
/* Test on blink speed */
if(BlinkSpeed == 0)
{
/*LED2 Toggle each 50ms*/
STM_EVAL_LEDToggle(LED2);
Delay(50); 
} 
else if(BlinkSpeed == 1)
{
STM_EVAL_LEDToggle(LED2);
/*LED2 Toggle each 200ms */
Delay(200); 
}
USART_SendData(USART2,0xAA55);
}
}
/**
* @brief Inserts a delay time.
* @param nTime: specifies the delay time length, in 1 ms.
* @retval None
*/
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;
while(TimingDelay != 0);
}
/**
* @brief Decrements the TimingDelay variable.
* @param None
* @retval None
*/
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{ 
TimingDelay--;
}
}
#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

Regards