void USART3_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART3| RCC_APB2Periph_GPIOB,ENABLE);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOAtiNG;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/*USART3 mode config*/
USART_InitStructure.USART_BaudRate=9200;
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(USART3,&USART_InitStructure);
USART_Cmd(USART3,ENABLE);
}
int fputc(int ch,FILE *f)
{
USART_SendData(USART3,(unsigned char)ch);
while(USART_GetFlagStatus(USART3,USART_FLAG_TC)!=SET);
return(ch);
}
static char *itoa(int value, char *string, int radix)
{
int i, d;
int flag = 0;
char *ptr = string;
/* This implementation only works for decimal numbers. */
if (radix != 10)
{
*ptr = 0;
return string;
}
if (!value)
{
*ptr++ = 0x30;
*ptr = 0;
return string;
}
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