Posted on April 25, 2013 at 14:50Hi,
I am currently using STM32w108CB microcontroller for my project. the board which i am using is developped by us. I wrote a serial communication program and was trying to view the transmitted data in a hyperterminal window. But I could not see any data in the hyperterminal window. It could also be the problem with the board. So, I tried to display the printf (''Hello world \n'') in the serial window of keil using semihosting. But I did not see anything in the UART1 window. Is there a way to display the string (hello world) in the UART window only by simulation before connecting the board?
I tried the following method to display the printf(''Hello world \n'') in the UART window.
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the UART */
UART_SendData(SC1_UART, (uint8_t) ch);
/* Loop until transmit data register is empty */
while (UART_GetFlagStatus(SC1_UART, UART_FLAG_TXE) == RESET)
{ }
return ch;
}
When it enters the
UART_GetFlagStatus(SC1_UART, UART_FLAG_TXE) == RESET) it continuously executing this statement indefinitely.
Hope you could help me with some usuful suggestions.
