How do I install fbcp-ili9341 drivers onto my Waveshare 3.2"?
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I have a Waveshare 3.2" TFT display and I would like to know if this driver will increase my framerate from what appears to be <10fps, and if so how would I go about installing said drivers? I'm quite new at the Raspberry Pi
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@obsidianspider How would I override my existing fbcp driver from waveshare?
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@zackdatitan I'm not sure how you installed it. Check your config files I guess.
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Try the following
git clone https://github.com/juj/fbcp-ili9341.git
cd fbcp-ili9341
mkdir build
cd build
cmake -DILI9341=ON -DGPIO_TFT_DATA_CONTROL=<the_pin_number_you_connected_DC_line_to> -DGPIO_TFT_RESET_PIN=<the_pin_number_you_connected_the_reset_line_to> -DSPI_BUS_CLOCK_DIVISOR=6 ..
make -j
sudo pkill fbcp # If the previous 'fbcp' program was running, it needs to be killed
sudo ./fbcp-ili9341The pin numbering is in "BCM" pins, which you can find e.g. at https://pinout.xyz/# , check the "BCM xy" names.
If the output appears garbled, try increasing -DSPI_BUS_CLOCK_DIVISOR= to a higher value,like 8 or 10.You need to delete dtoverlay=waveshare32b,... line in your /boot/config.txt, as well as dtparam=spi=on line.
For more details on how to tune the performance, check out https://github.com/juj/fbcp-ili9341/blob/master/ili9341.h#L24 . In particular, you may want to underclock the BCM core down from 400 to something like 300 or 280, so that you can utilize a smaller SPI bus clock divisor to get a higher SPI bus speed.
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Performance-wise, if your Waveshare 3.2" is able to reach 73.7 Mhz or higher, you will get a solid 60fps on the display. In such case, you can try enabling NO_INTERLACING in config.h. SPI bus speeds 66Mhz and higher will also in practice run at 60fps. 40Mhz-60MHz generally resort to interlacing every now and then, and < 40 MHz will typically run fully interlaced (e.g. ILI9486 based displays)
This video
is running a Raspberry Pi CM3 with a Waveshare 3.2" with SPI bus at 66MHz.
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