ChibiOS Free Embedded RTOS

It was really confusing because the coupling between spi, stop modes, and flash was really strange. I ended up writing a stand alone program to test just this path. In the end, I had to explicitly handle restarting power modes and flash after stop modes. Once that was done, your changed spi driver ...

ok, I spent a long time trying to debug this, but don't have a root cause. The basic model is
1) wake,
2) collect some data
3) write to external flash cache
4) program external page when full

After the cache actions, the code goes to stop1. When waking after (4), the code (every K times) writes a ...

That didn't work well -- still crashes after a while. I do use stop1 when the IMU is running while waiting for an interrupt. Not sure if that's the issue, but clearing the registers definitely makes something unhappy. I've found this part has a lot of subtle issues that aren't explainable by reading ...

I ran into a problem with testing the changes -- I do my builds with the stable-21-11.x branch and there are enough structural changes to the config files that I'm reluctant to tweak my entire repo because I depend upon being able to recreate the build environment for my data loggers if there is a ...

I'm not completely clear what you are asking me to do.

My use case is a bit unusual. I have devices that spend much of their life in standby and wake periodically from a wakeup even (either the rtc or a wakeup pin). Typically, they collect and store some data and then go back to standby. The ...

I struggled mightily trying to get the stm32u375 into standby mode in my application. stop3 worked fine, but standby got stuck in a high-power state. However, standby worked fine after hal and ch init, but not after talking to my sensors. The final thing that worked --

rccResetSPI1();
__DSB ...

I hadn't really thought in terms of a pull request. What would be the appropriate place within the ChibiOS directory structure?
Geoffrey

For my research designing data loggers for biologists studying songbirds I build a lot of custom "boards" (tags). A typical tag is 0.5g and goes a year on a 5.5mAh battery that is included in the 0.5g. I used quotes around "boards" because many of these are development designs to test specific ...

I never really got things working properly with stop3. I could execute code afterwards, but no longer write to flash for logging. I ended up taking the cowards way out -- park a tag in the backup registers and reset. In the particular software architecture, that was "normal" since on the stm32l432 I ...

Here's how I have my clocks enabled
#define STM32_HSI16_ENABLED FALSE
#define STM32_HSIKERON_ENABLED FALSE
#define STM32_HSI48_ENABLED FALSE
#define STM32_HSE_ENABLED FALSE
#define STM32_LSI_ENABLED FALSE
#define STM32_LSE_ENABLED TRUE
#define STM32_LSE_BYPASS TRUE
#define STM32_MSIRC0_MODE RCC ...