ATmega328p Memory Addresses
I learning to program the ATmega328p microcontroller in C and Assembler:
- In C, I define DDRB = 0x24.
- In Assembler, I define DDRB = 0x04
Can someone explain this difference in addresses (does that because the definition of the general purpose registers r0..r31, 0x00 .. 0x1F) ??
Solution
This is because the I/O address space is also mapped in the memory address space. It allows C to access them without using special instructions like OUT and IN.
You can use the 0x24 in assembly too - using the load and store instructions
It is not related to the language you use.
I strongly advise you to read the AVR documentation.
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