MicroPython Forum (Archive)

@brutor- Regarding your triangle wave post- I wonder if the artifacts are the result of your high sample rate. From page 137 of the data sheet (DM00037051.pdf) the max update rate is 1 MS/sec Max frequency for a correct DAC_OUT change when small variation in the input code (from code i to i+1LSB) Fr...

@brutor- I used REPL to enter the commands from your script relevant to DAC2, and I also saw the hard crash at dac_y.write_timed(buf_y, 1000, mode=DAC.CIRCULAR) I don't get the crash when entering just the commands for DAC1, the x buffer. It looks to me like some kind of bug, possibly a typo in the ...

@cjbarnes18: It's been a few days since you posted this, so you may have moved on. I can't tell for certain from your screenshot what the sample rate is or the frequency / period of the signal you are measuring, but my first thought upon seeing a waveform like that is to make sure that we aren't loo...

Good idea to start collecting OS X issues, there will be enough people trying to use it. True that I don't have a pyboard yet, though I have been testing; quite by coincidence last year I developed hardware using the STM32F405 in a conveniently similar configuration to the pyboard (SD Card, RTC, USB...

Epoz- So not completely dead, that is actually promising. You didn't say whether you tried to get it into DFU mode yet. You don't need to install dfu-utils to do this, just place the DFU jumper (not sure where on the board it is, but connects to pin 60 of the processor, may also be labeled BOOT0, bu...

Other things to try before giving up: -See if you can get the board to appear in DFU mode. If you place the DFU jumper (not sure where on the pyboard but it is in the docs) and hit the reset button (or just plug it in) you should see an entry for STM32 BOOTLOADER under the USB entry in the System In...

Thought it was about time I joined the user forum. I might not be a spambot, but I might not have the sense of humor to prove it either.
-Bryan

I don't have a pyboard yet, but I have been playing around with Micropython for a few months now on a board I have designed with a very similarly configured STM32F405 (designed months before I heard of micro python, pure lucky chance that it was such an easy port)! Anyway, I also use OS X and the ma...