Posted on September 23, 2013 at 11:33Hi,
I configured USART1 in stm32f051c8t6 but when i run the code on my h/w it goes hang. I dont where it is hanging. whether because of NVIC OR USART. But according to me it hang in NVIC because everything run ok..........
Please help me resolve this issues.....
I have given my configuration bellow;;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE) ;
RCC_USARTCLKConfig(RCC_USART1CLK_SYSCLK);
GPIO_InitStructure.GPIO_Pin = UART_TX_PIN ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_Init(UART_TX_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = UART_DTR_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_Init(UART_DTR_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = UART_RX_PIN ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(UART_RX_PORT, &GPIO_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_DeInit(USART1);
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_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART1, &USART_InitStructure);
// USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
USART_ITConfig(USART1, USART_IT_TC, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
/////////////////UART1 IRQ handler??????????????????????
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE)!= RESET)
{
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
if(USART_GetITStatus(USART1, USART_IT_TC)!= RESET)
{
USART_ClearITPendingBit(USART1, USART_IT_TC);
send_ctr++;
if(send_ctr <= 13)
{
uart_send_data = uart_msg[send_ctr];
USART_SendData(USART1, uart_send_data);
}
else
send_ctr = 0;
}
}
#provide-complete-code #stm32f051c8t6-usart-hanging-prob
