Some time ago, I found a neat tft for the raspberry pi at amazon.
I thought that it would be a good add on as I didn't have a spare monitor (my usage for the raspberry pi was very restrict - testing deployments, local git repositories, etc).
The device came with no written instructions. Came with a CD with an image to flash the raspberry. Back in the day, the image didn't work as expected. I thought something was wrong.
This week I've decided to give it a go again, as I have a new project for the raspberry pi.
pi@raspberrypi:~ $ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Parameters can be specified after the module name.
snd-bcm2835
i2c-bcm2708
i2c-dev
flexfb width=320 height=480 regwidth=16 init=-1,0xb0,0x0,-1,0×11,-2,2
50,-1,0x3A,0x55,-1,0xC2,0x44,-1,0xC5,0x00,0x00,0x00,0x00,-1,0xE0,0x0F
,0x1F,0x1C,0x0C,0x0F,0x08,0x48,0x98,0x37,0x0A,0x13,0x04,0x11,0x0D,0x0
0,-1,0xE1,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,0x03
,0x24,0x20,0x00,-1,0xE2,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,
0x06,0x10,0x03,0x24,0x20,0x00,-1,0×36,0x28,-1,0×11,-1,0×29,-3
fbtft_device debug=3 rotate=90 name=flexfb speed=16000000
gpios=reset:25,dc:24
#flexfb width=320 height=480 regwidth=16 init=-1,0xb0,0x0,-1,0x11,
-2,250,-1,0x3A,0x55,-1,0xC2,0x44,-1,0xC5,0x00,0x00,0x00,0x00,-1,0xE0,
0x0F,0x1F,0x1C,0x0C,0x0F,0x08,0x48,0x98,0x37,0x0A,0x13,0x04,0x11,0x0D
,0x00,-1,0xE1,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0x37,0x06,0x10,
0x03,0x24,0x20,0x00,-1,0xE2,0x0F,0x32,0x2E,0x0B,0x0D,0x05,0x47,0x75,0
x37,0x06,0x10,0x03,0x24,0x20,0x00,-1,0x36,0x28,-1,0x11,-1,0x29,-3
#fbtft_device debug=3 rotate=90 name=flexfb speed=16000000
gpios=reset:25,dc:24
#ads7846_device model=7846 cs=1 gpio_pendown=17 keep_vref_on=1 swap_
xy=1 pressure_max=255 x_plate_ohms=60 x_min=200 x_max=3900 y_min=200
y_max=3900
Lsmod:
pi@raspberrypi:~ $ lsmod | grep tft
fbtft 45056 1 fb_ili9486
syscopyarea 16384 1 fbtft
sysfillrect 16384 1 fbtft
sysimgblt 16384 1 fbtft
fb_sys_fops 16384 1 fbtft
dmesg:
pi@raspberrypi:~ $ dmesg | grep tft
[ 6.480255] fbtft: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.485770] fbtft_of_value: regwidth = 16
[ 6.485779] fbtft_of_value: buswidth = 8
[ 6.485787] fbtft_of_value: debug = 0
[ 6.485794] fbtft_of_value: rotate = 90
[ 6.485801] fbtft_of_value: fps = 30
[ 6.485807] fbtft_of_value: txbuflen = 32768
xrandr:
pi@raspberrypi:~ $ export DISPLAY=:0
pi@raspberrypi:~ $ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 480 x 320, current 480 x 320, maximum 480 x 320
default connected 480x320+0+0 0mm x 0mm
480x320 0.00*
X11vnc & xtightvncviewer
at the raspberry:
pi@raspberrypi:~ $ x11vnc
on my laptop:
$ xtightvncviewer 192.168.8.106
Connected to RFB server, using protocol version 3.8
No authentication needed
Authentication successful
Desktop name "raspberrypi:0"
VNC server default format:
16 bits per pixel.
Least significant byte first in each pixel.
True colour: max red 31 green 63 blue 31, shift red 11 green 5 blue 0
Using default colormap which is TrueColor. Pixel format:
32 bits per pixel.
Least significant byte first in each pixel.
True colour: max red 255 green 255 blue 255, shift red 16 green 8 blue 0
