I need to find data register address for GPIO pin 21 Cortex ARM M0?
I feel this question can need some background. I am learning embedded MCU programming and most sources mention that I need to find the address for the particular port / pin. It seems like a basic thing to do (so basic, that it is not really covered how to do it)
I studied manuals / architecture reference for Cortex ARM M0 closely, but could not find anything that can point me to the address. All I see is range (in my case, I know the peripheral range is 0x40000000-0x5FFFFFFF).
Here is the link to technical reference manual: http://infocenter.arm.com/help/topic/com.arm.doc.ddi0432c/DDI0432C_cortex_m0_r0p0_trm.pdf
Architecture reference: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0419b/index.html