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changeset 391:ee5e1c65657c 64kByte Logbook

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Debugging the TMR1...
author heinrichsweikamp
date Sun, 19 Jun 2011 20:22:52 +0200
parents a847f416e67e
children 8e272339fb68
files code_part1/OSTC_code_asm_part1/isr.asm
diffstat 1 files changed, 6 insertions(+), 7 deletions(-) [+]
line wrap: on
line diff
--- a/code_part1/OSTC_code_asm_part1/isr.asm	Sun Jun 19 14:20:19 2011 +0200
+++ b/code_part1/OSTC_code_asm_part1/isr.asm	Sun Jun 19 20:22:52 2011 +0200
@@ -176,22 +176,21 @@
 ;
 
 timer1int:
-		bcf		PIR1,TMR1IF					; Clear flag
-
 timer1int_debug:
 		bcf		LED_red						; LEDr off (For charge indicator)
 
-;		movlw	0x08						; Timer1 int after 62.5ms (=16/second)
-;		cpfslt	TMR1H						; Did we miss a 1/16 second?
-;		incf	timer1int_counter1,F		; Yes, add extra 1/16 second
-
 		btfsc	TMR1L,0						; Wait for low clock cycle
 		bra		$-2		
-		btfss	TMR1L,0
+		btfss	TMR1L,0						; Still high?
 		bra		$-2							; max. loop time: 61µs
 
 		movlw	0x08						; Timer1 int after 62.5ms (=16/second)
+		cpfslt	TMR1H						; Did we miss a 1/16 second?
+		incf	timer1int_counter1,F		; Yes, add extra 1/16 second
+
+		movlw	0x08						; Timer1 int after 62.5ms (=16/second)
 		subwf	TMR1H,F			
+		bcf		PIR1,TMR1IF					; Clear flag
 	
 		incf	timer1int_counter1,F		; Increase timer1 counter