Posted on September 07, 2012 at 09:01I'm using STM32F0DISCOVERY
I can't receive any char on UART, no interrrupt!
Here my initialization:
&sharpdefine RCC_PORT_RX RCC_AHBPeriph_GPIOA
&sharpdefine GPIO_PORT_RX GPIOA
&sharpdefine GPIO_PIN_RX GPIO_Pin_10
&sharpdefine GPIO_PIN_SOURCE_RX GPIO_PinSource10
&sharpdefine GPIO_AF_RX_PIN GPIO_AF_1
&sharpdefine RCC_PORT_UART RCC_APB2Periph_USART1
&sharpdefine USART_X USART1
&sharpdefine RCC_PORT_DEBUG RCC_AHBPeriph_GPIOC
&sharpdefine GPIO_PORT_DEBUG GPIOC
&sharpdefine GPIO_PIN_DEBUG GPIO_Pin_8
&sharpdefine DEBUG_ON() GPIO_SetBits ( GPIO_PORT_DEBUG, GPIO_PIN_DEBUG )
&sharpdefine DEBUG_OFF() GPIO_ResetBits ( GPIO_PORT_DEBUG, GPIO_PIN_DEBUG )
unsigned char UART_Init(UART_BPS bps) {
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_Odd;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx;
USART_InitStructure.USART_BaudRate = bps;
/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(RCC_PORT_RX, ENABLE);
/* Enable USART clock */
RCC_APB2PeriphClockCmd(RCC_PORT_UART, ENABLE);
/* Connect PXx to USARTx_Rx */
GPIO_PinAFConfig(GPIO_PORT_RX, GPIO_PIN_SOURCE_RX, GPIO_AF_RX_PIN);
/* Configure USART Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_RX;
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_UP;
GPIO_Init(GPIO_PORT_RX, &GPIO_InitStructure);
/* USART configuration */
USART_Init(USART_X, &USART_InitStructure);
/* Enable USART */
USART_Cmd(USART_X, ENABLE);
USART_ITConfig(USART_X, USART_IT_RXNE | USART_IT_ERR, ENABLE);
BufferTxFree = 1;
return 1;
}
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//ok
/**
* @brief This function handles USART1 global interrupt request.
* @param None
* @retval None
*/
void USART1_IRQHandler(void)
{
DEBUG_ON();
if(USART_GetITStatus(USART_X, USART_IT_RXNE) != RESET)
{
/* Read one byte from the receive data register */
RxBuf[RxBufWrIdx++] = USART_ReceiveData(USART_X) & 0xFF;
if(RxBufWrIdx >= RX_BUF_LEN) {
RxBufWrIdx = 0;
}
CheckBusy();
}
if(USART_GetITStatus(USART_X, USART_IT_TXE) != RESET)
{
BufferTxFree = 1;
}
DEBUG_OFF();
}
#stm32f0
