com.c

ARM_CORTEX-M3应用实例开发详解光盘

#include "..\APP\includes.h"


#ifdef __GNUC__ 
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf 
     set to 'Yes') calls __io_putchar() */ 
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) 
#else 
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) 
#endif /* __GNUC__ */ 


void USART1_InitConfig(uint32 BaudRate);

/*******************************************************************************
* Function Name  : PUTCHAR_PROTOTYPE
* Description    : Retargets the C library printf function to the USART.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
/*PUTCHAR_PROTOTYPE

{
   while (!(USART1->SR & USART_FLAG_TXE));
   USART1->DR = (ch & 0x1FF);
   
   return ch;
}
  */

void USART1_InitConfig(uint32 BaudRate)
{USART_InitTypeDef USART_InitStructure;
  
  USART_InitStructure.USART_BaudRate = BaudRate;
  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;

  /* Configure USART1 */
  USART_Init(USART1, &USART_InitStructure);
  
  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
}