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Applies to: RTX51 Tiny Real-time Kernel
Information in this article applies to:
While debugging my RTX51 Tiny application, I have found a code area that is never executed.
?RTX_TASKSWITCHING: PUSH ACC PUSH PSW PUSH B PUSH DPH PUSH DPL PUSH AR0 PUSH AR1 PUSH AR2 PUSH AR3 PUSH AR4 PUSH AR5 PUSH AR6 PUSH AR7
This code appears to save all registers before a task switch. The corresponding POP instructions are not called either. Why is this code included but never called?
The code is used to perform Round-Robin code banking. However, you application does not appear to switch tasks using round-robin. So, you are probably using the os_wait function to perform a task switch. If this is the case and if you do not require round-robin task switch, you should disable it. The unused code will not be included in your application.
To disable round-robin task switching, you must modify the CONF_TNY.A51 file as shown below:
TIMESHARING EQU 0 ; default is 5 Hardware-Timer ticks. ; ; 0 disables Round-Robin Task Switching
Article last edited on: 2005-07-17 10:53:43
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