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Brian Bulkowski
2020-03-08 19:40:00 -07:00
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@@ -32,7 +32,18 @@ What I tend to do with embedded systems is blink LEDs! Sure, there's other
fun stuff, but blinking LEDs is pretty good. The included `ledc` module in ESP-IDF is only for
changing the duty cycle and brightness, it doesn't control color-controlled LEDs like the WS8211.
Thus, we need FastLED.
Thus, we need FastLED
# TL;DR about this repo
As with any ESP-IDF project, there is a sdkconfig file. It contains things that might
or might not be correct for your ESP32. I've checked in a version that runs at 240Mhz,
runs both cores, uses 40Mhz 4MB DIO Flash, auto-selects the frequency of the clock, and
only runs on Rev1 hardware, and has turned off things like memory poisoning.
I've read scary stuff about Rev0 and GPIO. You have to insert a number of NOP statements
between bangs of the pins. If you're using that version, you might want to look carefully
into the issue.
# Use of ESP32 hardware for 3 wire LEDs
@@ -48,7 +59,8 @@ channels.
The FastLED ESP32 RMT use has two modes: one which uses the "driver", and
one which doesn't, and claims to be more efficient due to when it's converting
between LED RGB and not.
between LED RGB and not. I have not tested whether using the ESP driver
works.
Whether you can use the "direct" mode or not depends on whether you have other
users of the RMT driver within ESP-IDF.
@@ -56,8 +68,6 @@ users of the RMT driver within ESP-IDF.
Essentially, if you have the Driver turned on, you shouldn't use the direct mode,
and if you want to use the direct mode, you should turn off the driver.
I have not yet validated if this library correctly uses RMT.
No extra commands in `menuconfig` seem necessary.
# Four wire LEDs ( APA102 and similar )
@@ -436,4 +446,4 @@ you have to synchronize the clock and data.
If you have 3-wire LEDs, you'll be using the RMT system, which is super fast anyway.
The upstream code doesn't seem to use SPI on ESP32 either, so that's just a big hairy
todo, and don't worry overmuch.
todo, and don't worry overmuch.