#garfield Logs

May 21 2023

09:44 AM aandrew: rue_mohr: STM32 micros have a ROM bootloader. MOST chips even jump to it automatically if Flash is blank. In order to get to it, you have to jump to its entry point, which is USUALLY achieved by setting the BOOT0 pin high when releasing RESET#.
09:55 AM aandrew: however some STM32s have configurable BOOT0=0 and BOOT0=1 reset vectors and if you've changed the BOOT0=1 one then you can't get to the bootloader just with that
09:55 AM aandrew: once you're in the bootloader, there are numerous ways to get a new program into it. AN2606 (https://www.st.com/resource/en/application_note/cd00167594-stm32-microcontroller-system-memory-boot-mode-stmicroelectronics.pdf) lists what's available for each STM32
11:17 AM rue_mohr: because there is an externally accessable serial port, I'm presuming they left it in for updates
01:21 PM aandrew: possible, but they could also have locked it down so the only way to use the external serial port is thorugh their protocol/procedure
04:46 PM polprog: what did you get rue?
04:47 PM polprog: https://twitter.com/RueNahcMohr/status/1660392415331782656
04:47 PM polprog: wuts that
05:24 PM rue_mohr: its a, like 50HP VFD
05:24 PM rue_mohr: I'm using the guts to be the 3 HV DC motor drivers for the CNC
05:44 PM rue_mohr: and polprog set your twitter to "following"!!!
05:44 PM polprog: oh nice
05:44 PM polprog: rue_mohr: i have it set like that
05:44 PM polprog: :)
05:45 PM rue_mohr: how many people are you following... 392! hmm
05:45 PM rue_mohr: why the read-only account?
05:46 PM polprog: why read only
05:46 PM polprog: i also post a lot
05:51 PM rue_mohr: needs more original tweets about your projects!
05:53 PM polprog: i got loads of work tho
05:53 PM polprog: didnt do much work recent
05:53 PM polprog: recently*
05:58 PM polprog: gotta head to bed
06:01 PM rue_mohr: mhm
06:02 PM rue_mohr: I need to work out why my mirror decided to start spinning infinitly on the base
06:02 PM polprog: night
06:17 PM rue_shop5: cant find anything wrong
08:01 PM rue_mohr: my floor sweeper bot SN 2 is comming along, I should just need to adjust the software for it.