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micro timer help plz ASAP :( im having it after 2 few days :(

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goldfish300

New Member
well first of all im working on a pic 16f84a

we need to connect the circuit to an oscilloscope and to fit these conditions :

if signal on portA,0 < 10 hz ------> motor stop

else
if 10 hz < signal < 100 hz -----> motor left
else
if signal > 100 ------>motor right

plz if anyone knows how to write such a program help

i wrote something about interupt at RB0
in which its as follow:
at startup led PORTA, 0 is on for one second then im having two leds instead of motor which turn on after the delay of the first leds and just keep blinking like left >right and right > left until i press on the button and it just turn the right led for one second and then stop for one sec then cont to the left >right and right > left until i press on the button. im askin how to fix that for the timer0 with the conditions i need above :(

i don't know how to link this with an oscilloscope and writing the timer function.

well i the code is as follows
Code:
#INCLUDE <P16F84.INC>
	 #DEFINE		LED				PORTA, 0
	 #DEFINE		RELAY1			PORTB, 1
	 #DEFINE		RELAY2			PORTB, 2
	 #DEFINE		PB				PORTB, 0

     __CONFIG _WDT_OFF  &  _PWRTE_OFF  &  _CP_OFF  &  _XT_OSC 



      CBLOCK  0X0C
         W_TEMP, STATUS_TEMP, A1, A2, A3, B1, B2, B3


     ENDC




     ORG     0X000
     GOTO    MAIN
     ORG     0X004
     MOVWF   W_TEMP 
     SWAPF   STATUS,W
     MOVWF   STATUS_TEMP


     BTFSC   INTCON,INTE 
     BTFSS   INTCON,INTF
     GOTO    $+4  
     CALL    INTRB0 
     BCF     INTCON,INTF
     GOTO    RESTOREREG

RESTOREREG
     SWAPF   STATUS_TEMP,W 
     MOVWF   STATUS  
     SWAPF   W_TEMP,F  
     SWAPF   W_TEMP,W   
     RETFIE  


INTRB0 
	CALL	MOTOR_RIGHT
	CALL	DELAY_1S_B
	CALL	MOTOR_STOP
	CALL	DELAY_1S_B
    RETURN

MAIN
        CALL    SETUP
	BSF	 	LED
	CALL	DELAY_1S_A
	BCF		LED
	CALL	MOTOR_RIGHT	
	CALL	DELAY_1S_A
	CALL	MOTOR_LEFT
	CALL	DELAY_1S_A
	GOTO	$-4

MOTOR_RIGHT
			BCF		RELAY1
			BSF		RELAY2
			RETURN

MOTOR_LEFT
			BSF		RELAY1
			BCF		RELAY2
			RETURN

MOTOR_STOP
			BSF		RELAY1
			BSF		RELAY2
			RETURN

DELAY_1S_A
    MOVLW    D'46'
    MOVWF    A3
    MOVLW    D'189'
    MOVWF    A2
    MOVLW    D'37'
    MOVWF    A1
    DECFSZ   A1, F
    GOTO     $-1
    DECFSZ   A2, F
    GOTO     $-5
    DECFSZ   A3, F
    GOTO     $-9
    RETURN

DELAY_1S_B
    MOVLW    D'46'
    MOVWF    B3
    MOVLW    D'189'
    MOVWF    B2
    MOVLW    D'37'
    MOVWF    B1
    DECFSZ   B1, F
    GOTO     $-1
    DECFSZ   B2, F
    GOTO     $-5
    DECFSZ   B3, F
    GOTO     $-9
    RETURN


SETUP
     CLRF    PORTA
     CLRF    PORTB
     BSF     STATUS, RP0
     MOVLW   B'00000000'
     MOVWF   TRISA
     MOVLW   B'00000001'
     MOVWF   TRISB
     MOVLW   B'11000000'
     MOVWF   OPTION_REG
     MOVLW   B'10010000'
     MOVWF   INTCON
     BCF     STATUS, RP0
     RETURN


     END
 
Last edited:

Sceadwian

Banned
goldfish, all you posted was the ASM code, you didn't post any comments on what it does. It's not apparent and abhorrent to try to read someone elses ASM code without commentary.
 

blueroomelectronics

Well-Known Member
Assembly code should be liberally commented (as should any code) it's a good habbit and makes it possible for anyone reading your code to see what it's supposed to do.
 

goldfish300

New Member
im using a program called ASM code generator v1.2 i just put what i have on input and out and it just generate the code for me
 
Last edited:

amitak

New Member
can u post the schematic in JPG form .. i cant open the file u uploaded
i donot know if u still have time for the project, so i shall simply write my way of implementing it
the input should be given to interrupt, and the interrupt routine should should count the time between the two consecutive interrupts using timer
think of doing this to measure frequency
the rest of the program should be easy - a compare routine to ccompare the frequency and take the required action
hope this explanation makes it clear .. u can ask further doubts
i shall prefer that u understand the program flow and write the program yourself
it is easier to debug your own program than that written by somebody else
 
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