LCD Display - AXE131 Driver kit

E

eclectic

Moderator
Just my personal opinion.
Many people are are wary of external sites,
or, just can't be bothered to spend time or effort looking.
When you reply, use the
"Insert Image" Icon and Thumbnails.

Much faster for viewers to see.

e




KhtbX2z.jpg
 
A

Anonym

Active member
eclectic said:
Just my personal opinion.
Many people are are wary of external sites,
or, just can't be bothered to spend time or effort looking.
When you reply, use the
"Insert Image" Icon and Thumbnails.

Much faster for viewers to see.

e




View attachment 23601
Click to expand...
Oh, thanks for the heads up! Did not realize that... will use your way next time I post!
 
A

Anonym

Active member
Tried moving to the C.0 pin and using hsersetup and hserout, but still no luck. The picaxe is powered, the display is powered, my output is connected to the display driver input correctly and the code is directly from the manual... what can be wrong?
 
hippy

hippy

Technical Support
Staff member
The AXE131 board which attaches to the LCD should be initialising the display when powered-up so, that it isn't, would seem to suggest an issue with the AXE131 itself.

Some of the soldering on the LCD connector looks decidedly 'blobby' so it may be that there's not a good electrical connection between the AXE131 and the LCD.
 

Attachments

A

Anonym

Active member
hippy said:
The AXE131 board which attaches to the LCD should be initialising the display when powered-up so, that it isn't, would seem to suggest an issue with the AXE131 itself.

Some of the soldering on the LCD connector looks decidedly 'blobby' so it may be that there's not a good electrical connection between the AXE131 and the LCD.
Click to expand...
Right, thanks, will re-do them and get back.
 
hippy

hippy

Technical Support
Staff member
Some of your other soldering on your earlier boards looks to be a bit blobby as well so it could be you just need to get a bit more confident with holding the iron on the pad for longer while the solder melts and forms a nice volcano shape. Adafruit have a nice illustration here -

 
A

Anonym

Active member
hippy said:
Some of your other soldering on your earlier boards looks to be a bit blobby as well so it could be you just need to get a bit more confident with holding the iron on the pad for longer while the solder melts and forms a nice volcano shape. Adafruit have a nice illustration here -

Click to expand...
Thanks a lot! I've already made more blobs though... but I think that at least everything has to be properly connected now; but it still doesn't work.
 

Attachments

bfgstew

bfgstew

Senior Member
Looks like you have not fitted a 10K pot, this allows contrast adjustment of the screen. See the data sheet, but think it needs to go to pins 2, 3 and 4..........but check first!
 
A

Anonym

Active member
bfgstew said:
Looks like you have not fitted a 10K pot, this allows contrast adjustment of the screen. See the data sheet, but think it needs to go to pins 2, 3 and 4..........but check first!
Click to expand...
I have, that's the orange knob hanging off of the thing in my second picture... but thanks for the effort!
 
hippy

hippy

Technical Support
Staff member
You could try reprogramming the AXE133.bas firmware into the AXE131 board. If there's no firmware in the chip it won't be communicating with the LCD.
 
A

Anonym

Active member
hippy said:
You could try reprogramming the AXE133.bas firmware into the AXE131 board. If there's no firmware in the chip it won't be communicating with the LCD.
Click to expand...
IT WORKS!!! Reprogrammed the firmware and it did nothing, but then noticed the part about
Code: 
; Note you must uncomment just one of these two options
; depending on whether you have an LCD or OLED module
#define use_OLED
;define use_LCD
So I changed it to
Code: 
; Note you must uncomment just one of these two options
; depending on whether you have an LCD or OLED module
;define use_OLED
#define use_LCD
and it works!! Well, there is one detail... though the screen display my message correctly, after that it also sais "LCD", and on the second line "www.picaxe.com". How do I get rid of that/clear the screen?
 

Attachments

A

Anonym

Active member
One remark... this only seems to work for/control lines 1 and 3 of the display. Is there any way to get control of all four lines?
 
hippy

hippy

Technical Support
Staff member
Looking at your photo in post #15 there are four lines of background squares so it seems it could be a case that you are not actually accessing all four lines when writing to the display so things could be appearing off screen.

Continually writing "X" or any other characters should eventually fill the screen but a better way to do things is to run the code from the following thread which will identify what the codes need to be to access the start of each line -

https://picaxeforum.co.uk/threads/lcd-oled-memory-mapping.20677
 
hippy

hippy

Technical Support
Staff member
Anonym said:
Well, there is one detail... though the screen display my message correctly, after that it also sais "LCD", and on the second line "www.picaxe.com". How do I get rid of that/clear the screen?
Click to expand...
In the AXE133 firmware there is a "#define use_welcome" line ( about line 27 ). If you comment out that line and download that to the AXE131 board the LCD won't show "Serial LCD /www.picaxe.com" when its start up, will be a blank screen.
 
A

Anonym

Active member
hippy said:
In the AXE133 firmware there is a "#define use_welcome" line ( about line 27 ). If you comment out that line and download that to the AXE131 board the LCD won't show "Serial LCD /www.picaxe.com" when its start up, will be a blank screen.
Click to expand...
Thanks thanks! As mention in my I2C backpack post, I'm moving onto a proper OLED I2C display. But don´t worry, I'm keeping all of this in case I decide to come back to the LCD.
 
You must log in or register to reply here.
Top