USART串口通信 做了好几天都不行 麻烦大哥们来看看到底怎么回事

RJJ3872288

void RCC_Configuration(void) 

{

  RCC_DeInit();

  RCC_HSEConfig(RCC_HSE_ON); 

  while (RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET);

        RCC_HCLKConfig(RCC_SYSCLK_Div1);

        RCC_PCLK2Config(RCC_HCLK_Div1);

        RCC_PCLK1Config(RCC_HCLK_Div2);  

        RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

        RCC_PLLCmd(ENABLE);  

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

        RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);  

        while(RCC_GetSYSCLKSource() != 0x08);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_AFIO,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
』

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; 

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_PinRemapConfig(GPIO_Remap_USART1,ENABLE);

} 

void USART_Configuration(void)

{
        USART_InitTypeDef USART_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_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_Init(USART1,&USART_InitStructure);

USART_Cmd(USART1,ENABLE);

}

int main(void)

{

RCC_Configuration();

USART_Configuration();

GPIO_Configuration();

        USART_SendData(USART1, 0x25);

}
2303的驱动我也装好了 PA9 PA10跳线帽我也连上了 串口软件用的XCOM V1.2 求大神看下我这儿哪儿的毛病 看了几天了都不对

象牙塔

主函数怎么写的，仔细去看看例程啊！其他的就先不说了！

Admin

1.为什么要GPIO_PinRemapConfig(GPIO_Remap_USART1,ENABLE); ?

RJJ3872288

回复【3楼】Admin:
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因为要打开GPIOA的映射 让PA9 和PA10 映射到RXD 和TXD上 我用的MINI板子 板子上貌似是这样规定的。。。。

RJJ3872288

回复【3楼】Admin:
--------------------------------回复【3楼】Admin:
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大哥 好了 确实是那句话加错了

RJJ3872288

回复【3楼】Admin:
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多谢大哥！