Difference between revisions of "Events/2020/AVR"
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== Code Samples == | == 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; | const int DIRECTION_MASK = 0b00001110; | ||
uint8_t direction = 0b00001010; | uint8_t direction = 0b00001010; | ||
// https://github.com/gnea/grbl/blob/master/grbl/stepper.c#L324 | // https://github.com/gnea/grbl/blob/master/grbl/stepper.c#L324 | ||
DIRECTION_PORT = (DIRECTION_PORT & ~DIRECTION_MASK) | (direction & DIRECTION_MASK); | DIRECTION_PORT = (DIRECTION_PORT & ~DIRECTION_MASK) | (direction & DIRECTION_MASK); | ||
| + | cli(); | ||
| + | sei(); | ||
return 0; | return 0; | ||
| − | + | } | |
Revision as of 11:58, 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;
}
