thanks, will try with the address reported by pinctrl, that is indeed 0x20200000 BCM2835.
quite strange that the gpio.py using 0x3F200000 reported bit changes when plugging the test high level on a pin on the corresponding bit.
as if the mapping from the bus to physical memory was preserved for compatibility ??
As for the source of that info, I will check, i think i crossed checked various site sources and LLMs. There was quite a bit of confusion between them for sure. (some sources mixup bcm IC address spaces and raspberry pi physical memory as well as what model uses what BCM chip)
quite strange that the gpio.py using 0x3F200000 reported bit changes when plugging the test high level on a pin on the corresponding bit.
as if the mapping from the bus to physical memory was preserved for compatibility ??
As for the source of that info, I will check, i think i crossed checked various site sources and LLMs. There was quite a bit of confusion between them for sure. (some sources mixup bcm IC address spaces and raspberry pi physical memory as well as what model uses what BCM chip)
Statistics: Posted by rodv92 — Wed Aug 06, 2025 3:04 pm