apa102: use 4-byte buffer to improve speed

mirror of https://github.com/tinygo-org/drivers.git synced 2026-08-08 17:03:39 +00:00

Instead of sending the APA102 data byte by byte, it's more efficient to
send multiple bytes at once (especially when the SPI peripheral uses
DMA). This requires the apa102.Device object to be a pointer receiver to
avoid excessive heap allocations.

This commit also just happens to work around a hardware bug on the
nrf52832:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Ferrata_nRF52832_Rev2%2FERR%2FnRF52832%2FRev2%2Flatest%2Fanomaly_832_58.html&anchor=anomaly_832_58

This commit is contained in:

Ayke van Laethem

2021-05-30 01:21:10 +02:00

committed by

Ron Evans

parent 5ecefde991

commit 5a02fe068b

2 changed files with 20 additions and 18 deletions

									
										examples/apa102/itsybitsy-m0/main.go
									
		+1
		-1
	
												View File
												
				@@ -13,7 +13,7 @@ import (

				)

				var (

					apa apa102.Device

					apa *apa102.Device

					pwm   = machine.TCC0

					leds  = make([]color.RGBA, 1)