SPI version of the ST 7920 GLCD

[estevaon]

Hi BenR, I made the tests but unfortunately it isn't working.

[BenR]

Hello,

Ok it looks like the MISO pin isn't working for whatever reason. I'll add a buffered mode to the component so we don't need to rely on the readback for the display to function. The buffer will consume a bit of RAM - 1KB for a 128 x 64 pixel display.

[BenR]

Right I've pushed a new version to the library updates with a new Local Buffer property, just make sure this is set to yes and fingers crossed no more corruption on your display. The X,Y coordinate system is interesting (a mess) on these displays so fingers crossed I've payed it proper attention and got it right.

[estevaon]

Hi Benr! Thank you for your effort, it didn't work by a thread. The option local buffer made the diference but errors persist.

[BenR]

Hello,

Aha many thanks. I may have spotted my mistake, you can only directly address every even data byte and I had addressed the odd byte the wrong way. Hopefully it will be better now.

[estevaon]

Hi BenR,

You made it! It will be very usefull in my projets, I hope it help others.
Thanks!!!