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This is my source code, very simple.
#include <rtx51.h> #include <stdio.h> #include <math.h> #include <REGX51.H> void task1 (void) _task_ 1 _priority_ 1 { P2_1 = 0; os_wait(K_TMO, 100, 0); } void task2 (void) _task_ 2 { P2_1 = 1; os_wait(K_TMO, 100, 0); } void start (void) _task_ 0 { os_set_slice(10000); os_create_task (1); os_create_task (2); os_delete_task (os_running_task_id ()); P1=0; } void main (void) { P2_3=0; os_start_system (0); }
But when i use proteus to simulator this program, I see that : P2_3 is low, that ok. But P1 is always high. I think that the program doesn't run the funtion :void start (void) _task_ 0 . But I don't know why. Can you help me. Thank you very much.
If you leave out the forever loop in main then Keil will insert a LJMP to 'Main'at the end of Main. That is why your main continues forever. As was pointed out, you should not have a 'Main' when using RTX51. RTX51 always enters at Task 0. The Delete of the Task Startup code is a good practice. Normally you would have you system power up or reset initialization code in this task, then start your other tasks and then delete the Start up task. You don't want to re-run the initialization task again. I don't see where you define P2_3 as any set bit code. P2 is defined in the header but P2^3 is used to toggle the port bit. Do you have a definition that I missed? Bradford
Thanks for your help! But I see the examples in RTX51.pdf, all of them use main() function. So I don't understand how to leave main(). Could you tell me a example without main() function?
What is the result of the following:
#include <rtx51.h> #include <stdio.h> #include <math.h> #include <REGX51.H> void task1(void) _task_ 1 _priority_ 1 { while (1) { P2_1 = 0; os_wait(K_TMO,100,0); } } void task2(void) _task_ 2 { while (1) { P2_1 = 1; os_wait(K_TMO,100,0); } } void start(void) _task_ 0 { os_set_slice(10000); os_create_task(1); os_create_task(2); P1 = 0; os_delete_task(os_running_task_id()); } void main(void) { P2_3 = 0; os_start_system(0); }
Here is a quick modified code from the RTXTiny Example file. Bradford
#include <rtx51tny.h> #include <reg51.h> sbit Toggle = P2^1; /*****************************************************/ /* Task 0 'job0': RTX-51 tiny starts execution with task 0 */ /**************************************************/ void start (void) _task_ 0 { os_create_task (1); os_create_task (2); os_delete_task (os_running_task_id ()); } /****************************************************/ /* Task 1 'job1': RTX-51 tiny starts this task with os_create_task (1) */ /***********************************************/ void task1 (void) _task_ 1 { while(1){ Toggle = 0; os_wait(K_TMO, 100, 0); } } /****************************************************/ /* Task 2 'job2': RTX-51 tiny starts this task with os_create_task (2) */ /****************************************************/ void task2 (void) _task_ 2 { while(1){ Toggle = 1; os_wait(K_TMO, 100, 0); } }
Thank you very much for your code. I compile it with RTX-51 Tiny. It run successfull. I see the change state on P2_1.
Now I need to add the priority to the tasks. It means each task has different prioritys. And the program must use RTX-51 Full. From your code , I add the priority and compile with RTX-51 full. It's ok. But when I make simulation this program, I don't see any change state o P2_1. So I sets the same priority to task 1 and 2 . But that has no effect.
This is the code:
#include <rtx51tny.h> #include <reg51.h> sbit Toggle = P2^1; /*****************************************************/ /* Task 0 'job0': RTX-51 tiny starts execution with task 0 */ /**************************************************/ void start (void) _task_ 0 { os_create_task (1); os_create_task (2); os_delete_task (os_running_task_id ()); } /****************************************************/ /* Task 1 'job1': RTX-51 tiny starts this task with os_create_task (1) */ /***********************************************/ void task1 (void) _task_ 1 _priority_ 1 { while(1){ Toggle = 0; os_wait(K_TMO, 10, 0); } } /****************************************************/ /* Task 2 'job2': RTX-51 tiny starts this task with os_create_task (2) */ /****************************************************/ void task2 (void) _task_ 2 _priority_ 1 { while(1){ Toggle = 1; os_wait(K_TMO, 10, 0); } }
Could you give me advice? Thanks a lot!
Glad you have your first RTX Tiny running. I'm sorry but I do not have RTX Full on this computer so I do not have the documentation but have you added the correct header files for RTX Full? Have you selected the correct operating system under Targets -> Operating system? This will load the correct library files. That's about all I can remember of RTX Full without the documentation available to me at this time. Bradford