another newbie question.
I have a piece of code that I am porting from PICC. In PICC, you can make reference to specific pins ("#define sclk GPIO5" for example), and in your code, you can write to sclk to change the pin output on GPOI5. This makes porting code or changing pin layout so much easier as you can simple redefine sclk to a different pin to make the code work.
ARM seems to prefer to change its pin output through IOSET / IOCLR.
To make the existing PICC code work, I would prefer to be able to define certain pins logically, and change their states by referencing their logic names.
how do you do that in ARM? Thanks in advance.
"The ARM core is not designed for bit variables."
I think that's the case. the reasons given earlier about latency, gpio off bus, or the business model, etc. are really not fundamental. It appears that for some reason, ARM or their vendors decided that that was the way for this particular chip. why / how they did that I don't know, maybe we will never know.
"It has no bit-addressable memory,"
apparently until the Cortex chips.