In SX Microcontrollers, SX/B Compiler and SX-Key Tool, ShadowsSoldier wrote:

"Doggone" : )

I saw your SX-B code only after I struggled with the RTCC in assembly on my own. Downside: got blurry vision reading and less sleep. Upside: learned a lot.

Here is my intial code as a foundation of the final program I am writing. I am controlling 2 seperate bursts with long waits in between, but that code is pending.
Checked on SX-Sim the interrupt occurs every 64 cycles = 12.5 us (on + off = 40 KHz). I know my interupt routine can only be nc-7 cycles long otherwise I get an error. I'll post my final code when I get it working.


;5.120 MHz version 

Device SX28L, Turbo, Stackx, OSCHS3
IRC_CAL IRC_SLOW
FREQ	5_120_000


RESET Start 

ORG $000						

Interrupt						; interrupt Routine - always starts at $00
	Mov w,#-64
	Retiw

Start
; configure ports

	Mov M, #$0f		; access TRIS mode
	Mov W, #%0000		; bits 0-3 are outputs
	Mov !Ra, W		; make Ra0-Ra3 outputs
	Mov M, #$0f		; access TRIS mode
	Mov W, #%0000_0000	; all bits output
	MOv !Rb, W		; set Port B pins to output
	Mov M, #$0f		; access TRIS mode
	Mov !Rc, w		; set Port C pins to output

; configure RTCC rollover interrupt

	Mov w, #$9f
	Mov !option, w		;enable RTCC rollover interrupt
	Mov w, #$c0
	Mov rtcc, w		;initialize RTCC value to 192

; de-glitch initial state

Mov w, #%1001
Mov Ra, w		;set register A output to Ra0,Ra3 = 1 Ra1,Ra2=0
Mov w, #%0000_0000	
Mov Rb, w		;set register B output to digital LOW
Mov w, #%0000_0000
Mov Rc, w		;set register C output to digital LOW

MAIN
Loop
JMP LOOP

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