I built a embedded system in qsys which has the jtag_uart IP. Based on default set,jtag_uart is used as stdin, stdout. I create a hello world project and it can print hello world in console.
But after I added the command like:
getchar(), getc(), or fgetc(), then the program can't be build. It reports errors like: "undefined reference to 'getc' ". I copy my codes as below:
# include <stdio.h># include "..\hello_world_bsp\HAL\inc\io.h"# include "..\hello_world_bsp\system.h"
typedef unsigned int uint;
int main()
{
printf("Hello from Nios II!\n");
int c;
c= getc(stdin);
//c=getchar();
printf("This is from UART: %d", c);
return 0;
}
I also attached the screenshot. Why these functions which use jtag_uart to read don't work? Do I missed to include any files?
Thanks in advance.
