PWM and MEMORY

[pescador]

'12f683

' ======= config SETUP =================================

#CONFIG
cfg = _INTOSCIO
cfg&= _WDT_ON
cfg&= _PWRTE_OFF
cfg&= _MCLRE_OFF
cfg&= _CP_OFF
cfg&= _CPD_OFF
cfg&= _BOD_ON
cfg&= _IESO_ON
cfg&= _FCMEN_ON
__CONFIG cfg
#ENDCONFIG

' ======= Common Settings =================================

OSCCON = %01110001 ' Internal 8MHz osc.
DEFINE OSC 8
CMCON0 = 7
ANSEL = 0
OUTPUT GPIO.1
INPUT GPIO.4

PLEDOUT var GPIO.2 ' PWM output
BUTTEN var GPIO.4 ' BUTTON IN

HERTZ VAR byte
DUTY VAR byte

DUTY = 128
HERTZ = 50


MAIN:

pwm pledout,duty,HERTZ ' PLM output

IF BUTTEN = 0 THEN
DUTY = DUTY - 2
IF DUTY < 10 THEN
DUTY = 128
ENDIF
ENDIF

GOTO MAIN
END

[Jerson]

'12f683

' ======= config SETUP =================================

#CONFIG
cfg = _INTOSCIO
cfg&= _WDT_ON
cfg&= _PWRTE_OFF
cfg&= _MCLRE_OFF
cfg&= _CP_OFF
cfg&= _CPD_OFF
cfg&= _BOD_ON
cfg&= _IESO_ON
cfg&= _FCMEN_ON
__CONFIG cfg
#ENDCONFIG

' ======= Common Settings =================================

OSCCON = %01110001 ' Internal 8MHz osc.
DEFINE OSC 8
CMCON0 = 7
ANSEL = 0
OUTPUT GPIO.1
INPUT GPIO.4

PLEDOUT var GPIO.2 ' PWM output
BUTTEN var GPIO.4 ' BUTTON IN

HERTZ VAR byte
DUTY VAR byte

' DUTY = 128 ' this is not needed any longer
HERTZ = 50



read EE_Duty, Duty ' read from EEPROM address EE_Duty to Duty variable
if Duty > 128 then Duty = 128 ' limit the duty to 128 if it is > 128

MAIN:

pwm pledout,duty,HERTZ ' PLM output

IF BUTTEN = 0 THEN
DUTY = DUTY - 2
IF DUTY < 10 THEN
DUTY = 128
ENDIF

' save the new duty to eeprom
write EE_Duty, Duty
ENDIF

GOTO MAIN
END

Hope this helps

[pescador]

Jerson - I notice you have code on top of main: - the read and if - is that meant to be in the main? It actually compiled - and I have no endif for the if Duty > 128 statement... I dont understand this...

plus I created a word var - EE_DUTY...

update - works great - its what I needed.. I reduced the hertz to make it less choppy.

What I dont understand is the if without the endif above the main. Hope someone can clarify..

can I quick pay you?

[Jerson]

Jerson - I notice you have code on top of main: - the read and if - is that meant to be in the main? It actually compiled - and I have no endif for the if Duty > 128 statement... I dont understand this...

plus I created a word var - EE_DUTY...

update - works great - its what I needed.. I reduced the hertz to make it less choppy.

What I dont understand is the if without the endif above the main. Hope someone can clarify..

can I quick pay you?

I did not notice that. I meant to give you a quick hand up from where you were.

And the code

 if duty > 128 then duty = 128

is supposed to lock down the duty value to max 128. This comes in handy when the chip is newly programmed and the eeprom will read the value of duty as $FF.

Can you quick pay me - of course not - thank you. That's what we are here for. Lend a helping hand. It's you who learnt something out of it and I was once in your shoes.

[Jerson]

Jerson - I notice you have code on top of main: - the read and if - is that meant to be in the main? It actually compiled - and I have no endif for the if Duty > 128 statement... I dont understand this...

plus I created a word var - EE_DUTY...

update - works great - its what I needed.. I reduced the hertz to make it less choppy.

What I dont understand is the if without the endif above the main. Hope someone can clarify..

can I quick pay you?

I meant to give you a quick hand up from where you were.

And the code

 if duty > 128 then duty = 128

is supposed to lock down the duty value to max 128. This comes in handy when the chip is newly programmed and the eeprom will read the value of duty as $FF.

Can you quick pay me - of course not - thank you. That's what we are here for. Lend a helping hand. It's you who learnt something out of it and I was once in your shoes.