Topics created by daslolo

@m5mpy microcode is very low level, I like how these MCU bring back old memories and old hacks like I used to do on Amiga. And how in general they force into better programming habits.
So what I'm trying to do is general purpose signal camera. At the moment, a sound camera will do. From what I was told on eevblog, I need one FFT per microphone to calculate inter-mic delay. So far Arduino FFT switched to uint32 (faster on esp32 than uin8 I'm told) I'm getting 512 bins at 12 ms, which is't very zippy as I'll need 4 cameras at least. Not that big a deal because I don't need 60fps refresh but ... well, that would be nice :D
As for the frequency, at the moment I'm interested in detecting the origin of low frequency sound as they're notoriously difficult to locate by ear. Eventually I'd like to expand into an EMF camera.

No response from the m5 team on twitter so I returned it through Amazon.

answer: use the TFT_eSPI library, you can pass transparency color in the sprite draw functions

@calin freeze with no serial message.
What is the IDLE task and how do I control all this?

@dda So it is the "shut up"function ! ha ha

@daslolo Glad its working again.... I'm using standard Home edition on this machine - but the LTSB windows version you are using sounds like a good option I might use on another system. Thanks for mentioning....

After disconnecting the M5 from the computer and grounding the source, the sampled signal is very clean.

Bodmer wrote a nice article on this https://github.com/Bodmer/TFT_eSPI/issues/121#issuecomment-380245040
When un-commenting Display.h/#define SPI_FREQUENCY 40000000, fillscreen nearly doubles.
80M doesn't work on some M5.