stecman

-- LR imports
local LrApplication = import("LrApplication")
local LrApplicationView = import("LrApplicationView")
local LrBinding = import("LrBinding")
local LrDevelopController = import("LrDevelopController")
local LrDialogs = import("LrDialogs")
local LrExportSession = import("LrExportSession")
local LrFileUtils = import("LrFileUtils")
local LrFunctionContext = import("LrFunctionContext")
local LrLogger = import("LrLogger")

stecman

Date/time from GPS without storing NMEA string

This is a first pass at reading the date and time from a serial GPS device on a tiny microcontroller. The target device is an ATTiny13A with only 64 bytes of RAM, which isn't enough to store the full 79 characters of a NMEA sentence, so something like minmea wouldn't work (their API passes around full sentence strings).

When compiled with avr-gcc -Os, this is around 500 bytes of program space. The size can be reduced by 100 bytes if the handling of checksums is removed.

stecman

<?php

use Phalcon\Mvc\Model;

/**
 * Configuration and behaviours for all models
 */
abstract class BaseModel extends Model
{
    /**

stecman

/**
 * Thrown together program to dump 512 kbit EPROMs from an AVR ATMega64A/128A
 * More specifically, a bunch of ST M27C512 from the early 90's
 *
 * Connections:
 *
 *   Port A 0-7: low address byte (output)
 *   Port B 0-7: high address byte (output)
 *   Port D 0-7: data (input)
 *

stecman

#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/wdt.h>

#include <stdlib.h>
#include <string.h>

void init_usart(void)
{
    cli();

stecman

# Show file from Git tree at a certain point in the history
function hist() {
    local ref=$1
    local query=$2

    if [ -z $ref ]; then
        echo "Please specify a ref";
        return;
    fi

stecman

DEVICE = atmega328p
CLOCK  = 16000000
PROGRAMMER = -c arduino -P /dev/ttyUSB0 -b57600

AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE)

SOURCES = $(shell find . -name '*.c')
OBJECTS = $(SOURCES:.c=.o)

# Automatic dependency resolution

stecman

import os

# Device definition for the stm8s.h header
# This enables available features of the device library.
STM8_DEVICE_DEFINE = "STM8S003"

# Programmer argument for stm8flash (stlink or stlinkv2)
STM8_PROGRAMMER = "stlinkv2"

# Target device argument for stm8flash

stecman

AVR C 1-Wire + DS18B20 temperature sensor

This implements Maxim's One Wire / 1-Wire protocol for AVR microcontrollers from the DS18B20 datasheet and Maxim's other application notes.

Usage

Single DS18B20 device on bus

With just one DS18B20 on the 1-Wire bus, you can ignore slave addresses:

stecman

SCons + SDCC for STM8S

Setting up SCons to build using SDCC was fairly time consuming for someone new to SCons, so here's a basic working config to get you started.

With some tweaking this should also work for other architectures that SDCC supports (z80, z180, mcs51, r2k, etc).

Required software

SCons (build tool)