Posted on September 28, 2014 at 16:12Hi friends,
I have nio clue why I can't send anu data to usart. I use a stm32 Nucleo F401 on the usart 2 and absolutly no signal on GPIOA Pin 2 and 3.
If you could help me.
Thanks a lot
My source code is very simple :
UART_HandleTypeDef UartHandle;
void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOA_CLK_ENABLE();
__USART2_CLK_ENABLE();
GPIO_InitStruct.Pin =
GPIO_PIN_2; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin =
GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void init_usart(void)
{
UartHandle.Instance =
USART2; UartHandle.Init.BaudRate = 9600;
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
UartHandle.Init.StopBits = UART_STOPBITS_1;
UartHandle.Init.Parity = UART_PARITY_NONE;
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UartHandle.Init.Mode = UART_MODE_TX_RX;
HAL_UART_Init(&UartHandle);
__HAL_UART_ENABLE(&UartHandle);
}
int main(int argc, char* argv[])
{
char str[5] = { ''tests'' };
init_usart();
HAL_UART_Transmit(&UartHandle, (uint8_t*) str, 1, 0XFFFF);
HAL_UART_Transmit(&UartHandle, (uint8_t*) str, 1, 0XFFFF);
while (1)
{
//HAL_UART_Transmit(&UartHandle, &ch, 1, 0XFFFF);
}
}
#nucleo-f401
