本帖最后由 zhxingyu 于 2018-11-6 08:46 编辑
static void RCC_Configuration(void)
{
/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA|RCC_AHBPeriph_GPIOB|RCC_AHBPeriph_GPIOC|RCC_AHBPeriph_GPIOD|RCC_AHBPeriph_GPIOF, ENABLE);
/* Enable 8xUSARTs Clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_USART3|RCC_APB1Periph_USART4|RCC_APB1Periph_USART5, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6|RCC_APB2Periph_USART7|RCC_APB2Periph_USART8|RCC_APB2Periph_USART1, ENABLE);
}
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* USART1 IRQ Channel configuration */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* USART2 IRQ Channel configuration */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* USART3_8 IRQ Channel configuration */
NVIC_InitStructure.NVIC_IRQChannel = USART3_8_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/* USART3 Pins configuration ***********************************************/
/* Connect pin to Periph */
GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_4);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_4);
/* Configure pins as AF pushpull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
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_Init(USART3, &USART_InitStructure);
/* Enable 8xUSARTs Receive interrupts */
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
/* Enable the 8xUSARTs */
USART_Cmd(USART3, ENABLE);
void USART3_8_IRQHandler(void)
{
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
{
dumm = USART_ReceiveData(USART3);
// if(Usart_RxSetp(UsartIndex,dumm) == 0)return;
Usart_RxSetp(UsartIndex,dumm);
}
}
请帮忙看看USART3无法进入接收中断，能正常发送。当有数据时即进入死循环函数：
void HardFault_Handler(void)
{
/* Go to infinite loop when Hard Fault exception occurs */
while (1)
{
}
} |
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