waveshare 1.44 inch lcd display hat for raspberry pi install supplier

The ST7735S is a 132*162 pixel LCD controller, but the pixel of the 1.44inch LCD HAT is 128*128. So we have made some processing on the display: the horizontal direction starts from the second pixel to guarantee the location of RAM in the LCD is consistent with the actual location at the same time.

Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has a display requirement.

The final display effect is scaled and displayed on the 1.3inch LCD in proportion. The setting of the resolution here should be slightly larger than the LCD resolution, the too high resolution will cause the font display to be blurred.

【Note】The mouse.py needs to run under the graphical interface, which will not run under the SSH login. You can skip this step directly, the Pi will run the demo automatically by booting up.

Be careful not to add it to /etc/rc.local, because rc.local will be executed before the system enters the desktop, and if the PyMouse module runs on the command line interface, it will report an error that there is no mouse event, so we need to execute the following:

If fbtft is turned on, spidev0.0 will be occupied after restarting. If you need to run the demo at this time, you need to comment out the lines corresponding to fb in /etc/modules.

The final display effect is scaled and displayed on the 1.3inch LCD in proportion. The setting of the resolution here should be slightly larger than the LCD resolution, the too high resolution will cause the font display to be blurred.

【Note】The mouse.py needs to run under the graphical interface, which will not run under the SSH login. You can skip this step directly, the Pi will run the demo automatically by booting up.

Be careful not to add it to /etc/rc.local, because rc.local will be executed before the system enters the desktop, and if the PyMouse module runs on the command line interface, it will report an error that there is no mouse event, so we need to execute the following:

This is a LCD display HAT for Raspberry Pi, 1.44inch diagonal, 128x128 pixels, with embedded controller, communicating via SPI interface. It also comes with three push button and a joystick, a good option as user interface panel for your Raspberry Pi Zero :)

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There is an open source project on github: https://github.com/notro/fbtft. Thanks to its contributors. With this project, Raspberry Pi could supports TFT LCD perfectly. Let"s do it.

Note: You need to edit the name to the exact type of controller of your LCD. The controller of 1.44inch LCD HAT is ST7735s which is same as adafruit18_green and the fbtft support it as well, so we use adafruit18_green here.

9. You can see that there are all 0 on the memory, it is why the screen display black. We change the first line to FF, convert to BIN file again and save.

Then you can see that several white dots are display at left-bottom of screen. This is what Framebuffer work. If we change the data on buffer, the display will change as well,

The code will read one image, convert it to data and write to device /dev/fb1. Note that the display uses two bytes for one pixel which is based on RGB565.

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I formatted the card and started over. I immediately installed the Touch Display plugin and I no longer have the error " error: touch_display: Xserver unix domain socket cannot be determined.".

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