Greatings! I have stated a new project working with PWM and fading LEDs. All is going well until I tried to combine two simple test routines. The first two routines work fine. When I tried to use port indexing with PWM it failed. Can anyone point out my error or does the PWM command have limitations on pin discriptions? Manual says it can be a variable or pin discription, e.g. PortB.0 Is there another way to do this?
PIC16f886, PBP 2.6, using LAB X2 board.
;Cycle through PortB to fade ON then fade OFF eight LEDs in sequence.
Comments please, Thanks.
Wayne
PIC16f886, PBP 2.6, using LAB X2 board.
;Cycle through PortB to fade ON then fade OFF eight LEDs in sequence.
Code:
Symbol Port_Pin=PortB
Avar var byte
Duty var byte
Cycle var byte
;more stuff in here
;--[ LED fade ON and fade OFF ]--------- works fine!
FadeTest:
cycle=4 ;cycle is number of cycles of pulse
for Duty=0 to 100 step 1
pwm led1,Duty,cycle
next Duty
cycle=1 ;cycle is number of cycles of pulse
for Duty=100 to 0 step -2
pwm led1,Duty,cycle
next Duty
low led1 ;end of routine
pause 1000
goto FadeTest
;--[ PortB indexing LEDs ]-------------- works fine!
IndexTest:
for Avar=0 to 7
Port_Pin.0[Avar]=1
pause 250
Port_Pin.0[Avar]=0
pause 250
next
goto IndexTest
;--[ FireFlies routine ]------------------- FAILED
FireFlies:
for Avar=0 to 7
cycle=4
for Duty=0 to 220 step 1
pwm Port_Pin.0[Avar],Duty,cycle
next Duty
cycle=1
for Duty=220 to 0 step -2
pwm Port_Pin.0[Avar],Duty,cycle
next Duty
low Port_Pin.0[Avar] ;end of routine
Next Avar
goto FireFliesWayne