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楼主 |
发表于 2009-7-1 09:37:36
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好的 麻烦帮着看看!谢谢!
基本的初始化程序就不贴上了,那个应该是没有问题。
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_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_Clock = USART_Clock_Disable;
USART_InitStructure.USART_CPOL = USART_CPOL_Low;
USART_InitStructure.USART_CPHA = USART_CPHA_1Edge;
USART_InitStructure.USART_LastBit = USART_LastBit_Disable;
// 以上是串口部分的基本参数设置
USART_Init(USART2, &USART_InitStructure); //这是把上面的那些参数写到相应的寄存器里
USART_Cmd(USART2, ENABLE);// 串口使能
while(NbrOfDataToTransfer--)
{
USART_SendData(USART2, TxBuffer[TxCounter++]);
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
} //这里就是发送字符程序了,程序中的USART_SendData()里主要就是USART2->DR =TxBuffer[TxCounter++];一句,但是每当运行到这里时,寄存器DR的值还是零。。。。谢谢指点! |
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