RTX51 TINY: RTX Kernel not included

Information in this article applies to:

• C51 Version 5.50a
• C51 Version 6.10a

QUESTION

I have created a new RTX51 TINY application, why does the linker not detect that I'm using the RTX TINY kernel?

My program appears as follows:

void My_Task(void) _task_ 0  {
  init();
  printf("ABC");
  while(1) {
    ;
  }
}

ANSWER

The linker is not including the library because there are no calls to any of the RTX51 Tiny Library routines. It is not enough to just declare a task. You must also call at least one routine from the RTX51 Tiny library.

To solve this problem, you may call the os_switch_task function. Then, the linker will automatically include the correct RTX51 run-time library for your application. For example:

void My_Task(void) _task_ 0  {
  init();
  os_switch_task();  // Call at least one RTX library function
  printf("ABC");
  while(1) {
    ;
  }
}

MORE INFORMATION

• Refer to Programming Guildelines in the RTX51 Tiny User's Guide.
• Refer to os_switch_task in the RTX51 Tiny User's Guide.

Last Reviewed: Thursday, February 25, 2021