香版：STM32F103VE的UART4和UART5的中断

只看该作者 · 2011-11-16 09:59

本帖最后由 yzzly 于 2011-11-16 10:51 编辑

系统USART1、USART2、USART3工作正常，一旦使能UART4或者UART5的收发中断就出现硬件错误，可能是什么情况？UART的初始化出现是一样的，在另一个工程内就正常！！！

只看该作者 · 2011-11-16 10:58

郁闷！

只看该作者 · 2011-11-16 11:36

#if(USART4)
USART_DeInit(UART4);
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE); //使能端口C时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure); //PC11-RXD4
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure); //PC10-TXD4为推挽复用输出

Txd4_Cnt=Txd4_len=Txd4_timer=0;
Rxd4_Cnt=Rxd4_len=Rxd4_timer=Flags1.Rxd4Over=0;

USART_InitStructure.USART_BaudRate = UART4_BaudRate;
USART_InitStructure.USART_WordLength = (UART4_WordLen/9) << 12;
USART_InitStructure.USART_Parity = UART4_PCE << 10;
USART_InitStructure.USART_Parity |= UART4_PS << 9;
USART_InitStructure.USART_StopBits = UART4_StopBit << 12;
USART_InitStructure.USART_Mode = (UART4_RxEn<<2) | (UART4_TxEn<<3);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE); //使能UART4时钟
USART_Init(UART4, &USART_InitStructure);
// UART4->CR1 |= UART4_TxEIE << 7;
// UART4->CR1 |= UART4_RxNEIE << 6;
UART4->CR1 |= USART4 << 13; //使能USART4
#endif