BSSRR register
Getting extremely frustrated with ST’s documentation and documentation organization. Ready to drop this stuff and try another mfg family. I read about atomic bit manipulation of GPIO pins using BSSRR and BRR registers; this in the STM32L4_System_GPIO document. BUT nowhere else is there any information. I would have thought it would be in the programming document. Same for bit banding. I read about in one document and when looking through each data sheet’s “memory mapping” diagrams some have reference to the aliases and some do not. I am only looking at F4 and L4 data sheets having been led to believe all these should have bit banding function. And the sheets that show aliasing only show it for SRAM and not GPIO.
AND now with the STM32L4R5ZI under CubeMX I am activating SD card function and have choice of the usual 1 or 4 bit. But now there are additional options called “auto dir voltage converter” and “dir voltage converter” Okay, I assume this new part can operate at the low 1.7 volt but still interface with SD cards using a voltage converter. .... ????? BUT I SEARCH and search for any information within and outside the ST website and find nothing..... OR MAYBE IT IS about DIRECTION or also being a slave device; now that I see what the extra pins are called.......
HELP!!!!!! Need documentation...
;){kind=link}