st7789: fix scrolling when rotated by 180°

tinygo-org / drivers

TinyGo drivers for sensors, displays, wireless adaptors, and other devices that use I2C, SPI, GPIO, ADC, and UART interfaces.

https://tinygo.org

BSD 3-Clause "New" or "Revised" License

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Closed aykevl closed 1 year ago

aykevl commented 1 year ago

This fixes https://github.com/tinygo-org/drivers/issues/573. It doesn't handle 90° or 270°, I guess it needs a fix for 270° but I haven't tested that so didn't include it in the patch.

Tested on my PineTime on top of the current dev branch and it works in both 0° and 180° while previously it would only work with 180°.

Note that with this patch, the behavior matches the ili9341 driver, which appears to do exactly this in hardware (but the st7789 apparently doesn't).

conejoninja commented 1 year ago

Thanks for your work one more time! merged!