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I'm looking at using a 240x128 LCD with a UC1608 chip. Are there any packages that support parallel i/o with it? The UC1608 has support industry standard 3-wire, 4-wire serial bus (S9, S8, S8uc) and 8-bit/4-bit parallel bus (8080 or 6800). However I would like to look into 8 bit i/o for speed, not so much for the display refreshing but because there are a 2 other SPI devices that require attention along with some computation. So I don't want to spend much time with i/o on the display.

Anyone know of an existing library or C code to do this?

Thanks

  • how are you using the RPi in your project? – jsotola Jun 29 at 6:07
  • When I played with Arduino a couple of years ago, I played with HD44780 based line and graphics LCD. At that time, there were many Arduino demo programs. So I studied them and wrote my own programs. Once you know how the things work, it is tedious but not difficult to write programs in C++ or python. I guess UC1608 is of same complexity as HD44780. I casually googled but could not find any 4/8 bit drivers or programs for Rpi. As you say, it is easy to find I2C or SPI drivers, but they are a bit slow. So one approach is to find Arduino C++ code and translate them into Rpi GPIO code. – tlfong01 Jun 29 at 6:09
  • Or you might start exploring from I2C/SPI modules: 3.8 " 240 * 128 Graphic Serial SPI Parallel COG Matrix LCD Module UC1608 Controller - US$28 ( fr.aliexpress.com/item/33020523303.html ) For the HD44780 LCD modules, usually they piggyback an (easily removable) I2C/SPI 8 bit GPIO expander. You can easily unplug the I2C/SPI module and connect 4/8 GIPO pins to the HD44780/UC1608, and then write your own python UC1608 "driver" program, with reference from Arduino library programs, or vendors 8080/6800 assembly language or C programs. – tlfong01 Jun 29 at 6:16
  • Even if you find a linux based UC1608 driver/kernel module, it might be tricky to build it. You might like to skim the following post to see how complicated it is: (raspberrypi.stackexchange.com/questions/98549/… ). You can also find in the post how I started adapting an I2C based LCD module into a Rpi 4 GPIO parallel pin based LCD module. As I said earlier, this part is not that tricky, though tedious. – tlfong01 Jun 29 at 6:59

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