Array of pointers like (*(volatile unsigned long *)0x40004000)

Question

I am having a very hard time figuring out how to solve the following problem. I am on an embedded system with very little memory and want to minimize memory usage. Pointers

Answer 1

If I'm getting you right, this should be enough:

volatile unsigned long* GPIO_PORTA = (volatile unsigned long*) 0x40004000;

You could use that as

volatile unsigned long regxx = GPIO_PORTA[0x17];

// even

GPIO_PORTA[10] &= 0xF000;