Difference between revisions of "Events/2020/AVR"
Jump to navigation
Jump to search
(→Godbolt 1) |
(→Code Samples) |
||
| Line 2: | Line 2: | ||
== Code Samples == | == Code Samples == | ||
| + | <pre> | ||
#define __AVR_ATmega328P__ | #define __AVR_ATmega328P__ | ||
| Line 20: | Line 21: | ||
return 0; | return 0; | ||
} | } | ||
| + | </pre> | ||
Revision as of 11:59, 24 January 2021
Have you ever wondered what a little Arduino is really capable of? Ever wanted to really understand a chip? Learn lots of nitty-gritty details about the Microchip AVR architecture, the processor architecture that powers the Arduino and many other products.
Code Samples
#define __AVR_ATmega328P__
#include "https://raw.githubusercontent.com/vancegroup-mirrors/avr-libc/master/avr-libc/include/stdlib.h"
#include "https://raw.githubusercontent.com/vancegroup-mirrors/avr-libc/master/avr-libc/include/avr/io.h"
#include "https://raw.githubusercontent.com/vancegroup-mirrors/avr-libc/master/avr-libc/include/avr/interrupt.h"
#define DIRECTION_PORT DDRB
int main()
{
const int DIRECTION_MASK = 0b00001110;
uint8_t direction = 0b00001010;
// https://github.com/gnea/grbl/blob/master/grbl/stepper.c#L324
DIRECTION_PORT = (DIRECTION_PORT & ~DIRECTION_MASK) | (direction & DIRECTION_MASK);
cli();
sei();
return 0;
}
