OpenCR Port manipulation in Arduino

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1

Hello,
I would like to access the registers of the microcontroller. I have gone through the datasheet and tried to access the pins in opencr board.

I used - GPIOA_BASE → BSRR = 0b1<<3;

This gives an error “base operand of ‘->’ is not a pointer”
Kindly inform me how to rectify this error. Also inform is it possible to access the pins of opencr by registers in Arduino IDE.

Thanks for your help

2

Hopefully someone from Robotis will give you a better answer.

It has been awhile since I played with the openCR. I believe most all of this is buried in the Hardware Abstraction Layer.

And for example in their source file for doing things like digitalWrite… There is a comment near the top of the file:

the HAL drivers for STM32 do no access the registers directly
opaque structures are used to abstract the functions needed

existing STM examples show this defined locally a static
‘static GPIO_InitTypeDef GPIO_InitStruct;’

value which we set here. This is different than the
way maple and sam set the pins as they use a global
array that contains device specific register setting values

Not sure how easy it would be to get around the HAL or if that is possible.

Good Luck

3

@Sarwan
Hi,
You can get the list of available ports from below.

Also you may want to refer the example that directly accesses the register.