Thread: Write your driver

Writing kernel drivers is fun.

well when you have at least the manufacturer's informations

Yes, otherwise it is a major pain. Hell, even writing a parallel port driver for my VFD was a pain.. Mainly just getting the timing and workqueues to work properly.

wasn't it possible to manage the thing to work through serial port with a little max233 ?

perhaps, it is originally designed to run in parallel mode or serial mode. However, parallel mode is the only one supporting what they call "DMA" Mode, although it isn't truely Direct Memory Access. I don't think a chip as general as the Max232 would accomplish what I'm trying to do. I think in my case I would need a microcontroller like a PIC and program it to buffer my own serial protocol and write to the screen.

In short, I never bothered with the serial mode of the screen although it could be superior. I got it working in Parallel, it refreshes "fast enough" and that is good enough for me.

BTW, what is that cat eating? It looks like a child's arm or something.

Yes with a Pic as the max alone can't translate directly it only adapts the voltage level and converts it into 5v TTL.