"Function Generator" Triangular Wave disturb

[skimask]

PAUSEUS 1 should be fine for 1uS running at 40MHz.

Book says 2us minimum above 25Mhz on an 18F.

[Bruce]

Latest PBP manual. Page #113 states 40, 48, 64MHz OSC, "PIC18Xxxxx only" is 1uS.
25, 32, 33MHz is 2uS.

[precision]

Hi
Thanks sir Bruce.

I am in fault.
i wrote Pause 1 instead of PAUSEUS 1 after "Init_Triangluar:"

Thanks skimask and Acetronics.
I was reading manual. and sir bruce solved .......

There are no enough mind after bonding of straingage on 50 torque sensor in a day ....
Oh...

Thanks again, its working.

[Acetronics2]

a little spike here,may be ?

PORTD=200
PAUSEUS 1
PORTD=225
PAUSEUS 1
PORTD=255 ... should not be 250 ???
PAUSEUS 1
PORTD=225
PAUSEUS 1
PORTD=200

did you try :

Init_Triangluar:  TRISD=$00                             'PortD an Output Port
                  PORTD=0                               'Triangle-Wave at PortD
                                                        'Starting with Decimal 0 out of 255
                                                        'of the Maximum Output Voltage.
                                                    
                   PAUSEUS1                              'instead of PAUSE 1
                         		                '10 micro-seconds, in

PS : didn't notice the 40Mhz Define ... sorry !

[precision]

Yes Acetronics, Overall Shape is distressed ( in ladder ways ). I thought there is problem in D/A converter or in OP Amp OP07 ?

circuit attached.

Thanks

[Acetronics2]

Do you have a symmetrical AND > 7 v supply for the OP07 ???

might be compulsory ...

or try a rail/rail AOP ...

Alain

[skimask]

Latest PBP manual. Page #113 states 40, 48, 64MHz OSC, "PIC18Xxxxx only" is 1uS.
25, 32, 33MHz is 2uS.

Good point! Another update/change I hadn't noticed