fgets function doesn't work - c

Question

When I write the following code. Putty prints the text but I can't type anything below ..
For example :
First he does a printf --> who are you ?
Then I do a fgets where I normally most type something , that doensn't work.
At last he does another printf where he say ; good to meet you ...
int main(void)
{
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C1_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
char name[10];
printf("Who are you? \n");
fgets(name,10,stdin);
printf("Good to meet you, %s.\n",name);
return(0);
}
can anyone help me ?
thanks !

Answer 1

You have overwritten the implemnetation of fputs in your source code. So your linker doesn't need to lookup the library implementation of that function. With your implementation of fputc you have connected the stdio-output-path to your UART transmitter.
You need to define the corresponding input-path. This could be done by implementing a fgetc function. In that can the library function fgets can call your function, polling the UART receiver.
The default implementation of stdio in embedded environment is highly vendor dependent. It can be connected to
the JTAG debugger
the microcontroller specific debug/console ports
nothing.
Therefore you are responsible to make the right implemantation of that connection. This can be more complecated than the fputc implementation because you have to check, if there is data received at the UART at the time of call.