STM32F103VET6串口问题

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lucjn|

楼主 | 2012-11-22 18:28 | 只看该作者回帖奖励

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串口, STM32F103VET6, USART, SAR, ni

本人在调试STM32过程中遇到一个串口问题初始化：
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

USART_InitStructure.USART_BaudRate = 115200;

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_ClockInitStructure.USART_Clock = USART_Clock_Disable;

USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;

USART_ClockInitStructure.USART_CPHA = USART_CPHA_1Edge;

USART_ClockInitStructure.USART_LastBit = USART_LastBit_Enable;

USART_Init(USART1, &USART_InitStructure);

USART_ClockInit(USART1, &USART_ClockInitStructure);

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = RadioBox_GPIOA_UART2_Tx;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //设置为推挽复用输出模式

GPIO_InitStructure.GPIO_Pin = RadioBox_GPIOA_UART2_Rx;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置为上拉输入模式
GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_SendData(CDMAPort,*lb);
while(USART_GetFlagStatus(CDMAPort, USART_FLAG_TXE) == RESET)

发送完数据在while(USART_GetFlagStatus(CDMAPort, USART_FLAG_TXE) == RESET)一直死等，请问是什么原因？

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