bradford-hamilton

# Compile for attiny85 - optimize for size
compile:
	avr-gcc -Wall -Os -mmcu=attiny85 src/main.c

# Get the assembly
assembly:
	avr-gcc -S -Os -mmcu=attiny85 src/main.c -o assembly.asm

# Dump hex from out file
dump: compile

bradford-hamilton

...
// Add the SREG register
#define SREG REG(0x3F)
...

int main()
{
  ...
  // Write 1 to bit 7 (I-bit) for Global Interrupt Enable
  SREG |= BV_MASK(7);

bradford-hamilton

// When addressing I/O Registers as data space using LD and ST
// instrucrutions, 0x20 must be added to these addresses.
#define OFFSET 0x20

// Macro helper for registers
#define REG(addr) *((volatile unsigned char*)(addr+OFFSET))

// Port B Data Direction Register
#define DDRB REG(0x17)

bradford-hamilton

while (1) {
  for (unsigned int i = 0; i < 50000; i++) { PORTB |= (1 << 0); }
  for (unsigned int i = 0; i < 50000; i++) { PORTB = 0x0; }
}

bradford-hamilton

// Port B data direction register 0x17 (+ 0x20 for the special func register offset)
#define DDRB *((volatile unsigned char*)0x37)

// Port B data register 0x18 (+ 0x20 for the special func register offset)
#define PORTB *((volatile unsigned char*)0x38)

int main()
{
  // Set data direction for Port B bit 0 (PB0 - pin 5)
  DDRB |= (1 << 0);

bradford-hamilton

int main()
{
  // Set data direction for Port B bit 0 (PB0 - pin 5) to 1 for output
  DDRB |= (1 << 0);

  // Set data for Port B bit 0 (PB0 - pin 5) to 1 to turn on LED
  PORTB |= (1 << 0);
  
  while (1) {}
}

bradford-hamilton

// Port B data direction register
#define DDRB *((volatile unsigned char*)0x17)

// Port B data register
#define PORTB *((volatile unsigned char*)0x18)

int main() {}

bradford-hamilton

package cache

import (
	"container/list"
)

type lru struct {
	cap   int                           // max number of items the cache can hold before needing to evict.
	ll    *list.List                    // a doubly linked list.
	items map[interface{}]*list.Element // map of keys -> doubly linked list elements

bradford-hamilton

package cache

import (
	"container/list"
	"errors"
	"sync"
)

// ErrMinCacheSize is returned when a caller tries to create a new LRU cache with a capacity of less than one
var ErrMinCacheSize = errors.New("please provide an LRU cache capacity greater than or equal to 1")

bradford-hamilton

package dora

import (
	"errors"
	"fmt"
	"strconv"

	"github.com/bradford-hamilton/dora/pkg/ast"
)