Arduino for STM32

Nope. These libraries are too hardware dependent to simply port.

ag123, you are correct!!!! I was mistakenly thinking of the STM32F2xx!!!

The backup registers are not the same as the 4KB of backup SRAM. I am asking if there is a way to assign variables to that specific 4KB area of SRAM that is maintained during STOP sleep.

CPU = STM32F103RCT6
Core = LibMaple

Is there a way to "point" or designate variables to be stored in the area of SRAM that is maintained during STOP sleep?

Roger, your work and this site saved my bacon on a tough project. If it had not been for your and this great community's contributions, my workload would have been trippled. Thank you, thank you, thank you!

Question: Where will you venting all that energy next?

UPDATE: I wrote a new set of sleep functions based on the STM32 Core libraries. With these I was able to flash my test code via the STM32 built-in serial bootloader and was able to achieve 38uA STANDBY sleep current consistently. Oddly, if I drop Vdd to 2.8V (from 3.3v), the current rises to 77uA an...

Timoteo, I am having similar issues in getting the lowest power in STANDBY mode and they seem to be related to flashing code using Serial (no bootloader) versus USB (with bootloader). See here: http://stm32duinoforum.com/forum/viewtopic.php?f=28&t;=4485 This makes no sense to me except that the bootloader i...

I added systick_disable() before calling wfi and it made no different. Besides, all clocks are disabled in STANDBY sleep. I tried with both the bootloader and Serial flash with the same results. The current with the Serial load is actually 1.8 - 2.0mA while that of the USB bootloader flash is 38uA.

I have a blue pill board that I am using for measuring STOP and STANDBY mode current to the MCU. I removed the power LED resistor and I am powering the board (external programmable PSU) via the 3.3 pin to bypass the regulator. All measurement were done with a Siglent SDM3045X multimeter. A little ba...

The min/max difference is substantial. It would be nice to calculate the standard deviation to get a sense of the distribution. Or count the number of instances where the time is greater than the average.