81 lines
2.0 KiB
Markdown
81 lines
2.0 KiB
Markdown
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# Sharp Memory LCD Kernel Driver
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**Note**: I did not write this driver. I only modified it to clean up compiler warnings/errors. The original can be found here:
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(http://www.librecalc.com/en/wp-content/uploads/sites/4/2014/10/sharp.c)
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More information can be found here:
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(http://www.librecalc.com/en/downloads/)
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This driver is for the LS027B7DH01. It *should* work with other Sharp Mem LCD displays by modifying all 400/240 references with the correct dimensions for your screen.
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## Hookup Guide
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Connect the following pins:
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Display | RasPi
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------- | ---------
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VIN | 3.3V
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3V3 | N/C
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GND | GND
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SCLK | 11 (SCLK)
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MOSI | 10 (MOSI)
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CS | 23
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EXTMD | 3.3V
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DISP | 24
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EXTIN | 25
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## Compile/Install the driver
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Verify that you have the linux kernel headers for your platform. For the RasPi these can be obtained by:
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```
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sudo apt-get install raspberrypi-kernel-headers
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```
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or more generally:
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```
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sudo apt-get install linux-headers-$(uname -r)
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```
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To compile the driver, run:
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```
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make
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```
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To install the driver, run:
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```
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sudo make modules_install
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```
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If you want the module to load at boot you'll need to add it to the /etc/modules file, like:
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```
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...
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# This file contains...
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# at boot time...
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sharp
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```
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## Compile/Install the Device Tree Overlay
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The included sharp.dts file is for the Raspberry Pi Zero W. To compile it, run:
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```
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dtc -@ -I dts -O dtb -o sharp.dtbo sharp.dts
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```
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To load it at runtime, copy it to /boot/overlays:
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```
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sudo cp sharp.dtbo /boot/overlays
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```
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And then add the following line to /boot/config.txt:
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```
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dtoverlay=sharp
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```
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## Console on Display
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If you want the boot console to show up on the display, you'll need to append `fbcon=map:10` to /boot/cmdline.txt after *rootwait*, like:
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```
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... rootwait ... fbcon=map:10
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```
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To make sure the console fits on screen, uncomment the following lines in /boot/config.txt and set the resolution appropriately:
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```
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framebuffer_width=400
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framebuffer_height=240
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```
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