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5 years, 2 months ago.
Stm32L4 best low power mode for accelerometer application and how to wakeup on falling edge?
Hi,
I wanna use the lowest power mode possible for my stm32l432kc. I want MCU to wakeup on accelerometer motion. I've read in AN4621(page 13) that i2c is detected only in stop mode and that it generate a wakeup on i2c address detection (if I understand it correctly). But as I explained this is not what I want. I wish if I can use the shutdown mode.
My second question is, the accelerometer interrupt pin is 0 when there is motion, is it possible to wakeup the MCU with low edge? and if so, guide with the programming of generating an interrupt please
1 Answer
5 years, 2 months ago.
Hello,
My possible guidance will not cover mbed. Just check here. And may be you can adapt it to mbed in one way or another.
https://blog.brichacek.net/wp-content/uploads/2015/10/STM32F4-Labs.pdf
In deeplseep I2C is turned off, I recommend to use an extra intr input wire.
posted by Helmut Tschemernjak 10 Feb 2019