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ST7789 graphics example not working with Metro M4 or Metro M
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ST7789 graphics example not working with Metro M4 or Metro M

by MakerMelissa on Fri Mar 22, 2019 10:27 am

I'm trying to get the graphics test functioning on a Metro M4 or Metro M0. I have tested successfully on an Arduino Mega 2560 and Arduino Due. However, even though it is wired up the same, it remains a black screen. I've more than triple checked the wiring, so I'm sure that's fine. I'm not sure if this is some incompatibility or timing issue due to the SAMD processor. I'm trying to write a displayio driver and want to ensure that this display functions with this board in Arduino first. Thanks.

MakerMelissa
 
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Re: ST7789 graphics example not working with Metro M4 or Met

by MakerMelissa on Sat Mar 23, 2019 2:40 pm

Ok, what I've figured out is that the Pin Numbers on the SAMD chips don't directly correspond to the Arduino Chip numbers. However, looking at the HallowWing pins in the ST7789 example, I'm still trying to figure out how those correspond to the Pin Numbers on the SAMD51.

MakerMelissa
 
Posts: 72
Joined: Wed Jun 05, 2013 2:10 am

Re: ST7789 graphics example not working with Metro M4 or Met

by MakerMelissa on Sat Mar 23, 2019 3:19 pm

I went back to the basics with LEDs attached to pins and verified that the Pin numbers I thought we mapping were correct, so I'm back at figuring out if it's a SPI thing or something else.

MakerMelissa
 
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Re: ST7789 graphics example not working with Metro M4 or Met

by MakerMelissa on Sat Mar 23, 2019 11:05 pm

I got my CircuitPython driver working, so this isn't a priority anymore, though it is something to be aware of.

MakerMelissa
 
Posts: 72
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Re: ST7789 graphics example not working with Metro M4 or Met

by MakerMelissa on Fri May 10, 2019 12:16 am

If anybody else runs into this, it should now be resolved in version 1.3.2 of the ST7735/ST7789 Arduino Driver

MakerMelissa
 
Posts: 72
Joined: Wed Jun 05, 2013 2:10 am

Please be positive and constructive with your questions and comments.