Nios® II Embedded Design Suite (EDS)
Support for Embedded Development Tools, Processors (SoCs and Nios® II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++
Announcements
Intel Support hours are Monday-Fridays, 8am-5pm PST, except Holidays. Thanks to our community members who provide support during our down time or before we get to your questions. We appreciate you!

Need Forum Guidance? Click here
Search our FPGA Knowledge Articles here.
12437 Discussions

Why none getchar(), getc, fgetc() work ?

Altera_Forum
Honored Contributor II
969 Views

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.
0 Kudos
1 Reply
Altera_Forum
Honored Contributor II
139 Views

Anyone has idea? 

 

Thanks.
Reply