C GPIO

[martind1983]

 Very nice and comprehensively answered and also works as you know.
However, thank you man

hi,  just for clarification, in your judgement then, is the current manual correct in what it states ( in regard to this thread ) or does it have omissions that we could document more throughly so that others don't have this issue.

In other words, is the above comprehensive explanation in the manual necessary to make sense of what the current manual states, or is the current manual complete as it stands ( in your opinion )?   Thanks.

Hi Mark

In my opinion. When the programmer uses correct type casting. What I haven't done in my first case you can easily access all registers in the chip. As our colleague implied to us. This works perfectly.

I just wanted to say for example: If PIO address 0x01c20800 would be possible to map (as it is not possible because of page size alignment). It would be easily possible to access any register from PIO peripheral just by adding its order number to mapped PIO address. Let's say

PB_CFG0_REG register you could access by adding 1 to PIO base address what is 0x01c20800, like normal pointer arithmetic. However, as you cannot map PIO base address, you can only map CCU address what is 0x01c20000 and there are not any registers you could manually count like I described in previous lines or maybe it would be possible but it would be laborious. The aforementioned way KnReLe did is very goog and as I said you should be able to access any register in the chip.

I should review my typecasting a bit

Thank you to all