STM32F407VE有没有USART6引脚输出？

只看该作者 · 2016-11-17 17:20

407英文简介的第46页说明63（PC6）、64（PC7）是USART6的输出引脚，但是配置后能进入发送中断引脚没有输出信号，而USART1~USART5都工作正常。
void Uart6_Configuration(void)
{
#if(COM6)
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStruct;
NVIC_InitTypeDef NVIC_InitStructure;

USART_DeInit(USART6);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6,ENABLE); //Ê¹ÄÜUART6Ê±ÖÓ

NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //ÇÀÕ¼Ê½ÓÅÏÈ¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //Ê¹ÄÜ¶Ë¿ÚCÊ±ÖÓ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //GPIOÄ£Ê½
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz; //GPIOËÙ¶È
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //GPIOÊä³öÀàÐÍ
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; //GPIOÉÏÀ¡¢ÏÂÀ¡¢²»À
GPIO_Init(GPIOC, &GPIO_InitStructure); //PC6-TXD6

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //GPIOÄ£Ê½
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz; //GPIOËÙ¶È
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //GPIOÊä³öÀàÐÍ
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; //GPIOÉÏÀ¡¢ÏÂÀ¡¢²»À
GPIO_Init(GPIOC, &GPIO_InitStructure); //PC7-RXD6ÎªÍÆÍì¸´ÓÃÊä³ö

GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_USART6);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_USART6);

USART_InitStructure.USART_BaudRate = Uart6.BaudRate;

USART_InitStructure.USART_WordLength = (COM6_WordLen/9) << 12;

if(Uart6.CheckModle) //ÓÐÐ£Ñé
{
USART_InitStructure.USART_Parity = 1 << 10;
USART_InitStructure.USART_Parity |= (Uart6.CheckModle-1) << 9;
}
else //ÎÞÐ£Ñé
{
USART_InitStructure.USART_Parity = USART_InitStructure.USART_Parity & (~(1 << 10));
}
USART_InitStructure.USART_StopBits = COM6_StopBit << 12;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_HardwareFlowControl |= COM6_RTSE<<8;
USART_InitStructure.USART_HardwareFlowControl |= COM6_CTSE<<9;
USART_InitStructure.USART_HardwareFlowControl |= COM6_CTSIE<<10;
USART_InitStructure.USART_Mode = (COM6_RxEn<<2) | (COM6_TxEn<<3);
USART_Init(USART6, &USART_InitStructure);

USART6->BRR=ComputeUsartBRR(APB2CLK,Uart6.BaudRate,COM6_OVER8);

if(COM6_DMAT)
{
USART6->CR2 |= COM6_DMAT << 7;
}
if(COM6_DMAR)
{
USART6->CR2 |= COM6_DMAR << 6;
}
USART6->CR2 |= COM6_CLKEN << 11;
USART6->CR2 |= COM6_CPOL << 10;
USART6->CR2 |= COM6_CPHA << 9;
USART6->CR2 |= COM6_LBCL << 8;

USART6->CR1 &= ~(COM6_TxEIE << 7);
USART6->CR1 |= COM6_RxNEIE << 5;
USART6->CR1 |= COM6 << 13;

Uart6.TxdCnt=Uart6.TxdLen=0;
Uart6.RxdCnt=Uart6.RxdTimer=Uart6.Rxd=0;
#endif
}