| /** | |
| * 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) | |
| * |
| #include <avr/interrupt.h> | |
| #include <avr/io.h> | |
| #include <avr/wdt.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| void init_usart(void) | |
| { | |
| cli(); |
| # 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 |
| 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 |
| 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 |
| 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 |
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).
The Brother PTP300BT label maker is intended to be controlled using the official Brother P-Touch Design & Print iOS/Android app. The app has arbitrary limits on what you can print (1 text object and up to 3 preset icons), so I thought it would be a fun challenge to reverse engineer the protocol to print whatever I wanted.
Python code at the bottom if you want to skip the fine details.
Intitially I had a quick peek at the Android APK to see if there was any useful information inside. The code that handles the communication with the printer in Print&Design turned out to be a native library, but the app clearly prepares a bitmap image and passes it to this native library for printing. Bitmaps are definitely something we can work with.
| # This makefile is set up to work with the Arduino bootloader | |
| # Depending on your device, you may need to adjust the PROGRAMMER | |
| # line to point to the right serial port. | |
| # | |
| # To use, just run "make flash" with an arduino connected | |
| DEVICE = atmega328p | |
| CLOCK = 8000000 | |
| PROGRAMMER = -c arduino -P /dev/ttyUSB0 -b57600 | |
| SOURCES = $(shell find -name '*.c' -or -name '*.cpp' -or -name '*.S') |
| #pragma once | |
| // AVR | |
| extern "C" { | |
| #include <avr/io.h> | |
| } | |
| #define GD_PSR 0x00 // Panel settings | |
| #define GD_PWR 0x01 // Power setting | |
| #define GD_BTST 0x06 // Booster soft start |