Digole 128x64 Graphic LCD Driver

R

rjandsam

Member
Hi,
I have a Digole graphics LCD driver and I am driving it using its serial input and it works great, I just want to change the start up screen.
I have used the software that they provide on the website to convert the image but I do not understand the manual.
I have the data I want to send in hex format for an image 128x64 I just don't understand the lower byte of data length higher byte of data length and could do with some data lessons if possible.

Set Start Screen, 1st B is the lower byte of data length,
2nd B is the higher byte of data length, following by
data.
For mono display, the start screen is bitmap data;
For color display, the start screen is commands set, the
first and second bytes are the commands length.

http://www.digole.com/images/file/Tech_Data/Digole_Serial_Display_Adapter-Manual.pdf

page 7

Thank you
Rich
 
R

rjandsam

Member
Yes the reply was page 7 in the manual I just thought that maybe I could get a few pointers here as the module is great im using it with a 20x2.
 
S

srnet

Senior Member
Not Sure what Rev Eds attitude is to support for these, the Digole displays are a competitive product.
 
R

rjandsam

Member
well I guess if you don't have any pointers in this area with these drivers srnet im going to struggle, as you seem to have had the most experience with them.

Rich
 
S

srnet

Senior Member
Do remember that these forums are provided free for you to use by the manufacturers of PICAXE, and one of the products they sell is a similar product to the Digole display.
 
R

rjandsam

Member
I do realise that and I purchase an awful lot from techsupplies but sometimes they don't sell an item that I would like such as a tiny 128x64 OLED display hence I have to buy a product elsewhere such as many do on this forum weather it be a wireless module,LCD or many other items I have seen discussed on here purchased elsewhere. If I have offended Rev-Ed or any other forum members I sincerely apologise, the support I have received from this forum has been incredible and I am appreciative of this hence the reason I am asking for a little advice on something that I really don't even need to change it was just something I didn't understand.

Rich
 
G

g6ejd

Senior Member
I have this screen, the format is:
SSSBBB so send it SSS then 00 then 04 then 1024 bytes of data

In binary LSB,MSB 0040 represents 1024 (128x64/8)

e.g.
SerOut LCD, T9600_16,("SSS",0x00,0x04)
SerOut LCD, T9600_16,(your data next all 1024 bytes of it....

Adjust your LCD and speed accordingly. e.g. 6 and 2400 or whatever for that display, mine has been set to 9600 default.
 
G

g6ejd

Senior Member
To test the image, I suggest writing a short programme to fill the memory with all 1's or 010101 e.g. 0x55

SerOut LCD,9600,("SSS",0x00,0x04)
For I = 0 to 1023
SerOut LCD,9600,(0x55)
Next
 
R

rjandsam

Member
Hi g6ejd,
I tried the suggested code and it looks like it starts but then stops and I have no idea why, have you ever changed the background on yours?
this is what is happening.
Rich

SerOut c.7,t9600_64,("SSS",0x00,0x04)
For w0 = 0 to 1023
SerOut c.7,t9600_64,(0xdf)
Next
end
digole.jpg
 
G

g6ejd

Senior Member
Speed, try putting a delay (pause) after the SerOut c.7,t9600_64(0xdf) command, about 2mS to begin with, so pause 2. The pattern is correct, so your pushing too much data too fast to it.
 
R

rjandsam

Member
Thank you. Adding a pause 100 worked, the screen is now full of the same repeated byte. Does this mean that when I convert my image into a 1024 I will have to put a pause 100 after each byte?
Rich
 
G

g6ejd

Senior Member
Don't know the exact value, but I suggest you vary your data byte value (to see a change) and try out pause 50 then pause 25 and iterate to a n optimised value.

There is little data available, but it might be simply a need to add another stop bit, which at 9600 baud would be 0.1mS so a minimum pause of 1 might be worth a try.
 
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