bitbank2 / spi_lcd Goto Github PK

I'm not getting anywhere when trying to use this library on an Armbian mainline/ NanoPi NEO. I uncomment the #define USE_NANOPI2 line and use the #define USE_GENERIC lines. Do the 'make' and then the 'make -f make_sample' without any issues. However, when I try to run the lcd sample, I'm getting:

root@connectbox:~/SPI_LCD# ./lcd
Error setting SPI mode
Error setting SPI speed
Failed to open the SPI bus
Problem initializing spilcd library

Any ideas of what is missing and how I can get this running?

I have a ST7725R TFT LCD from Adafruit ( https://www.adafruit.com/product/2088 ) but it is 128x128, not 128*160.

It is connected to a Raspberry Pi with the following https://www.adafruit.com/product/3356 on SPI0.

I tried to modify your code to change all the instance of 160 by 128, but could not make it work. Your demo code does display garbage of color, and and the end I can almost read "Big rotd".

Would you know the difference between this and your reference ST7725 128*160 screen?

PS: No big deal, I can drive it and copy from fb0 with code from https://github.com/adafruit/Pi_Eyes but I was trying to use SPI_LCD and BB-CP (I know, it is supposed to be for ili9341 320x240 LCD). This might be silly on it's own since there might be no need for optimisation for such a small screen. Thanks anyway for all the code you are sharing, and the ultimate goal of 60fps for retrogaming on little screen.

I have this display:


On the back of my display it also says HX8357C.
Can the display be used on the Raspberry Pi Zero W with your library? How would you connect the pins to the Raspberry Pi?
Where would I have to make modifications to the code to get it running?

Thank you for your help.

Hi
this is my LCD : http://www.elecfreaks.com/wiki/index.php?title=2.2S%22_TFT_LCD:_TFT01-2.2S and I could run it by fbtft driver and notro library with SPI protocol. My board is NanoPi-M1 and my wiring was this:

LCD pins    GPIO pin numbers on Linux
reset:                1
led:                   6
sdi/mosi:          64
sdo/miso:        65
sck:                 66
cs:                   67
d/c:                 201

So, If I want to use SPI_LCD, which files should be edited to match my board, my LCD(ili9341) and my wiring?

Not sure anyone is interested but I modified existing main.c to run as a Arduino .ino program.
Called it SPI_Sample.ino. It was tested on Arduino Due rev3 using AdaFruit's 2.8 tft with ILI9341 driver.
Only one mod to spi_lcd.cpp
changed line 187 from
SPI.transferBytes(pBuf, ucRXBuf, iLen);
To:
SPI.transfer(pBuf, iLen);
all files in the attached zip file
SPI_Sample.zip

Hey! (I'm in the right repo this time haha)
Great work on this by the way.

I am trying to get this working on a NanoPi Duo2 but I cant seem to get them right, I looked at your mapping table in the spi_lcd.c file, chose NanoPi Duo2 as that has the same GPIO Pin out.

Any help where to map the final 2 pins of DC/X and Reset would be most helpful.

Thanks in advance.

Hello. Where can i find this file?

Hi @bitbank2!

Thanks a lot for your work on the library.

I am currently building a small project using a raspi zero with a ili9341 screen. I want to run RetroPie/Recalbox on it but with all my tests (default drivers + fbcp) there's a small lag I can't get rid off.

I'd like to try using your driver and see if I can get better results. Is that possible? How should I do that do have the entire screen running on tft using your driver?

Thanks in advance!