MTF-T035
Contents
TFT Specifications
The MTF-T035 320x240 3.5" color TFT display from Microtips is the default TFT display supported. Two pin compatible versions of this LCD are available: one with touchscreen (analog outputs) and one without. The MTF-T035 is provided with a 4 white led backlight.
The specification can be found here: [1]
Some photos are although available here: Board Pictures
Important: the TFT equipped with a touch panel requires an external touch controller which is not on the LCD_Adapt. This is due to the fact that the touch panel option was not available when the LCD_adapt was designed.
Nevertheless, the touch controller will be present on the DevFull board.
Adapter Board
This kind of LCD requires an adapter board. The small board generates the required bias voltages, integrates a white led driver and provides a standard 2.54 connector interface. It has to be noted that only a 3.3V supply is required.
The specification can be found here: [2]
The schematics can be found here: [3]
The assembly drawings can be found here: [4]
Note that the pin 1 of the connectors are although written in the top layer copper.
Connecting the LCD to the adapter board
Connections with the DevLight
Just connect signals with same names together. Use the shortest wires you can !
The DevLight schematics and specification may be usefull: [5]
Once done verify the connections by means of your multimeter. Do not forget to check the 3.3V supply polarity on the LCD_adapt board before to power up the system !
Troubleshooting
- If your LCD shows too much White then set the potar on the LCD_Adapt to the minimum value.
- LCD screen sleep after a certain time, to awake it type :
echo 0 > /sys/class/graphics/fb0/blank
A crontab can be made :
mkdir -p /var/spool/cron/crontab crontab -e
write line :
*/5 * * * * echo 0 > /sys/class/graphics/fb0/blank
And launch crond :
crond
To awake LCD each 5 minutes, it's a tricky patch and it seems to not work :-(
