STM32 串口3 USART3 速度不正确，数据是错误的
我USART3全映射到PD8 PD9上面，可以发送数据也可以接收数据，但是感觉波特率是不正确的，数据全是错误的下面是程序，不知道是不是不能用函数库初始化，有过经验的朋友们肯请你们帮忙一下，先放谢过
void USART3_config(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 19200;
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_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_Cmd(USART3, ENABLE);
}
上面是初始化程序，用232模块还有485模块都试过，数据都是有问题的，但是可以正常进行中断处理，是否波特率不应该这样设置，请求帮助
我觉得可能不是配置的问题可能是你发送函数写的有问题 我的代码是ok的
void USART3_Configuration(void){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
//使能串口3，PB，AFIO总线
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE); //串口时钟配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //开漏输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M时钟速度
GPIO_Init(GPIOB, &GPIO_InitStructure);
RS485_CTL3_L(); //RECEIVE
/* B10 USART3_Tx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽输出-TX
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* B11 USART3_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入-RX
GPIO_Init(GPIOB, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockInit(USART3, &USART_ClockInitStructure);
USART_Init(USART3, &USART_InitStructure);
/* Enable the USARTx */
USART_Cmd(USART3, ENABLE);
//串口3使用接收中断
USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);
}
/**************************************************************************************
* 名 称:
* 功 能:
* 参 数:
* 返 回 值:
*
* 修改历史:
* 版本 日期 作者
**************************************************************************************/
void USART3_Putc(unsigned char c)
{
RS485_CTL3_H(); //SEND
SysTickDelay(1);
USART_SendData(USART3, c);
while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET );
SysTickDelay(1);
RS485_CTL3_L(); //RCV
}
