What is the correct OSTimeTickHook() implementation on a BL5S220 SBC?

Rabbit Rabbit Software
1

Struggling with a very simple timer setup using the OSTimeTickHook() hook to bump a timer. unfortunately, Timer does not budge.

Here’s the code:

#class auto

#define OS_CPU_HOOKS_EN 1

#use UCOS2.LIB

unsigned count = 0 ;
unsigned temp_count = 0 ;
unsigned last_count = 0 ;
unsigned delta_count = 0 ;

void OSTimeTickHook( void ) ;
void main( void ) ;

//-----------------------------------------------------------------------------
// Main line.
//-----------------------------------------------------------------------------

void main()
{

OSInit();
OSTaskCreate( OSTimeTickHook, NULL, 512, 0 ) ;

while ( 1 ) {

	costate {


		temp_count = count ;
    	delta_count = temp_count - last_count;

     	printf( "Count = %u Last = %u Delta= %u

", temp_count, last_count, delta_count) ;
last_count = temp_count ;

		waitfor(DelayMs(100));

	} // costate

} // while

} // main

#asm

OSTimeTickHook::

ld		hl, (count)
inc	hl							; increment counter
ld		(count), hl

ret

#endasm

2

The first problem here is that you are mixing uCos and costates. You have to pick one or the other for multi tasking to work as far as I know.

Try taking one of the sample uCos programs and adding the hook into that.

Regards,
Peter

3

Thank you Peter.

I was able to get the code working this morning by adding the OSStart() routine and moving the test code to another routine using OSTaskCreate( Test_Routine_1, NULL, 512, 0 ) ;
The OSTimeTickHook() is being called correctly.

I started out not using the uCos, but found TIMER B was too fast for a general purpose timer. Is there a better way to setup a 1ms timer on this SBC?

In general, are most developers using the uCos OS for multitasking? I’m not even keen on using the costate. Normally, I just setup a timer interrupt (plus input capture, ADC, serial interrupts) and cycle through state tables in the mainline.

Thank you again!

Kind regards,

Al