So, the only place to buy raspberry pi addons where I live is an aftermarket which is not very well documented. I recently purchased a 3.5 inch resistive tft screen, with no information about the manufacturer, for about $25. I'm trying to hook it up to my Pi 2 which is running a fresh install of Raspbian Jesse, using this tutorial and a few blog posts. The problem is that I don't know the name of the device or the manufacturer, so I cannot complete the tutorial.
Here are some pics of the screen. It uses GPIO headers to connect to the pi2, but gets stuck at the white screen.
The Steps I have followed so far:
- Installed a fresh copy of Raspbian Jesse (from raspberry pi website) on my Raspberry Pi 2.
- Expanded my filesystem to the full SD card (I had some problems with the later steps the first few times I tried this)
sudo apt-get updateand
sudo apt-get upgrade(in that order)
- Edited the file:
sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf, changed “fbdev” “/dev/fb0” to “fbdev” “/dev/fb1”
- Since my Raspbian was after 1-31-2015, I entered
sudo raspi-configand enabled SPI automatic loading and kernel.
- Downloaded the notro files with
sudo REPO_URI=https://github.com/notro/rpi-firmware rpi-update[EDIT: I did this process again but by using
sudo rpi-updateinstead, no dice]
- Edited file:
sudo nano /etc/modulesto:
fbtft_device name=waveshare32b gpios=dc:22,reset:27 speed=48000000
waveshare32b width=320 height=240 buswidth=8 init=-1,0xCB,0x39,0x2C,0x00,0x34,0x02,-1,0xCF,0x00,0XC1,0X30,-1,0xE8,0x85,0x00,0x78,-1,0xEA,0x00,0x00,-1,0xED,0x64,0x03,0X12,0X81,-1,0xF7,0x20,-1,0xC0,0x23,-1,0xC1,0x10,-1,0xC5,0x3e,0x28,-1,0xC7,0x86,-1,0x36,0x28,-1,0x3A,0x55,-1,0xB1,0x00,0x18,-1,0xB6,0x08,0x82,0x27,-1,0xF2,0x00,-1,0x26,0x01,-1,0xE0,0x0F,0x31,0x2B,0x0C,0x0E,0x08,0x4E,0xF1,0x37,0x07,0x10,0x03,0x0E,0x09,0x00,-1,0XE1,0x00,0x0E,0x14,0x03,0x11,0x07,0x31,0xC1,0x48,0x08,0x0F,0x0C,0x31,0x36,0x0F,-1,0x11,-2,120,-1,0x29,-1,0x2c,-3
ads7846_device model=7846 cs=1 gpio_pendown=17 speed=1000000 keep_vref_on=1 swap_xy=0 pressure_max=255 x_plate_ohms=60 x_min=200 x_max=3900 y_min=200 y_max=3900
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait fbtft_device.custom fbtft_device.name=waveshare32b fbtft_device.gpios=dc:22,reset:27 fbtft_device.bgr=1 fbtft_device.speed=48000000 fbcon=map:10 fbcon=font:ProFont6x11 logo.nologo dma.dmachans=0x7f35 console=tty1 consoleblank=0 fbtft_device.fps=50 fbtft_device.rotate=0
- Added to
sudo nano /etc/rc.local:
su -l pi -c startx
sudo raspi-configand enabled loading into desktop GUI autologin by default.