TS-7250-V3 LCD Header: Difference between revisions
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The TS-7250-V3 Debian images include a command [https://github.com/embeddedarm/ts7100-utils/blob/master/src/lcdmesg.c lcdmesg]. This can be used to write to our [https://www.embeddedarm.com/parts/LCD-LED LCD-LED] display. | |||
For example, this would write to the display: | |||
<source lang=bash> | |||
lcdmesg "line 1" "line 2" | |||
# Messages can also be piped to lcdmesg: | |||
echo -e "line 1\nline 2\n" | lcdmesg | |||
</source> | |||
For example, running: | |||
<source lang=bash> | |||
lcdmesg Technologic Systems | |||
</source> | |||
will display: | |||
[[File:LCD LED example.jpg|500px]] |
Revision as of 15:09, 27 February 2020
The LCD header is a 0.1" pitch 2x7 header including GPIO. This is designed around compatibility with the HD44780 LCD controller which includes our LCD-LED. The LCD Data pins (7-14) are 5V tolerant. These will output up to 3.3V, and the remaining control IO and PWM are 3.3V tolerant.
Signals | Pin Layout | ||||||||||||||||||||||||||||||
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- ↑ This pin is used to dynamically adjust contract on the LCD. This may need to be tuned depending on the environment or altitude where the display is used.
The TS-7250-V3 Debian images include a command lcdmesg. This can be used to write to our LCD-LED display.
For example, this would write to the display:
lcdmesg "line 1" "line 2"
# Messages can also be piped to lcdmesg:
echo -e "line 1\nline 2\n" | lcdmesg
For example, running:
lcdmesg Technologic Systems
will display: