Default pin mode

[burrbull]

@usbalbin According to RM default pin mode (state on reset) for G4 is Analog.

stm32g4xx-hal/src/gpio.rs

Line 11 in 64aa1ff

pub type DefaultMode = Input<Floating>;

[burrbull]

DAC pins should also be configured as Analog. Right?

[usbalbin]

@usbalbin According to RM default pin mode (state on reset) for G4 is Analog.

Wow, nice catch. Weird how this has not been found out until now. Very good find!

DAC pins should also be configured as Analog. Right?

Not very clear, but from what I can tell, yes.

[burrbull]

What about this? As you said yesterday it is not available in Analog mode.

stm32g4xx-hal/tests/nucleo-g474.rs

Line 354 in 64aa1ff

assert!(is_pax_low(gpioa, 4));

[usbalbin]

Yes

 (7/7) running `dac`...
ERROR panicked at tests/nucleo-g474.rs:358:9:
assertion failed: !is_pax_low(gpioa, 4)

[usbalbin]

Moving the dac test to tests/nucleo-g474_w_jumpers.rs and instead checking pa1 (which should be connected to pa4 for those tests) and it works fine again

https://github.com/burrbull/stm32g4xx-hal/compare/gpio-generic...usbalbin:stm32g4xx-hal:move-dac-test?expand=1

[usbalbin]

@usbalbin According to RM default pin mode (state on reset) for G4 is Analog.

And judging by GPIOx_MODER under 9.4.1 this is only the case for most of the pins, but not all.

Reset value: 0xABFF FFFF (for port A)
Reset value: 0xFFFF FEBF (for port B)
Reset value: 0xFFFF FFFF (for ports C..G)

[AdinAck]

Reset value: 0xABFF FFFF (for port A)

Yeah those pins on port A are for the SWD pins, by default they are in the respective alternate function mode (for good reason, of course).