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Blinkinlabs / ch554_sdcc

CH554 software development kit for SDCC
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ws2812 example doesn't work with default clock setting #32

Closed buttim closed 4 years ago

buttim commented 4 years ago

I had to change FREQ_FSYS in Makefile.include to 12000000 to make it work, otherwise no LED in the strip lights on. Tested with a ws2812 24 LED ring and a 72 LED strip

cibomahto commented 4 years ago

Thanks for reporting- it's likely that the default frequency was 12MHz when this example was last tested!

jjmz commented 4 years ago

I just noticed that max. system frequency at 3.3V is 16Mhz : I spent much time trying to have the Blink example work before trying to reduce FREQ_SYS... So the problem might be related to the CH554 board you are using (I have an Electrodragon CH554, where the default config is to use 3.3V)

buttim commented 4 years ago

Same board here. Now we fully understand the problem. Thanks!