LCD Serout

Hello all,

I am trying to test my LCD. I am using Demo Version of PBP and it will not allow me to use Include Files.

If someone can compile the program below so that i may test my LCD i would appreciate it...

Once i test my board Fully and know the PBP works i will purchase...

also, if someone could even let me know if the program below will even work I would appreciate that too. I am using a Parallax 4x20 LCD @ 9600 Baud. I am using a PIC16F876A device.

Thanks,
Gary D.



INCLUDE "modedefs.bas"

SEROUT PORTA.5,N9600,["Hello World"]

If you look in the Modedefs.bas file or the "Serout" section of the PBP manual you will see that N9600 is defined as

N9600 = 6 ' Driven Inverted

Do either of the following

N9600 CON 6 ' Driven Inverted to declare the constant

or

SEROUT PORTA.5,6,["Hello World"]

Both should compile as you arent using any include files.

Ok,

Awesome...

i have some activity but i think that the LCD is not getting enough Power.

Thanks a lot for your help !!

Gary D.

Quote:

---

Originally Posted by RFEFX

i have some activity but i think that the LCD is not getting enough Power.

---

???

If it wasnt getting enough power it wouldnt work.

Assuming it is displaying the characters you sent then it probably just needs the contrast adjusting.

Ok.... I have been tying to program this LCD for the last couple days..

Im using the PIC16F876A on PORTA.5

The LCD Specs are Here

when i send

SEROUT PORTA.5,6,["Hello"]

or when i send

SEROUT2 PORTA.5,84,["hello"]


I get nothing but the Cursor moves around a lot.

Has anyone got code for the Parallax LCD 4x20 Module.

you have to disable the analog A/Ds

ADCON1=7

And probably analog comparator
CMCON=7

Nope... Still nothing....

Is the Test mode work?

If so, set it to 2400 Bauds,, reset the LCD module and try...

Code:

---

ADCON1=7
CMCON=7
HIGH PORTA.5
PAUSE 500

SEROUT PORTA.5,4,["Hello"]
Z: goto Z

---

AND this one

Code:

---

ADCON1=7
CMCON=7

DEFINE DEBUG_REG PORTA
DEFINE DEBUG_BIT 5
DEFINE DEBUG_BAUD 2400
DEFINE DEBUG_MODE 0

HIGH PORTA.5
PAUSE 500

debug "Hello"
Z: goto Z

---

If i refer to their datasheet and the code example, it must be driven TRUE.

Wich osc speed are your using?

LCD start up test works...

I am running a 20Mhz Crystal Oscillator in HS mode...

LCD is receiving data just not what i send it... Just a bunch of characters.



Regards,
Gary D.

since I was using the PIC16F876A in HS mode with a 20Mhz Clock... I failed to define the OSC....

ADCON1=7
CMCON=7
DEFINE OSC 20

and there you have IT... Serial LCD works like a charm...

Thanks to all that helped.