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minimosd-ng

MinimOSD-ng is a new firmware written from scratch for the MinimOSD hardware.
It's not built under arduino ide and you will need an AVR programmer to burn it (like a cheap usbasp).
The project is in an early stage but it can already be used.

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The concept

MinimOSD-ng is based on the following keywords: tabs and widgets
A tab is what you currently see on the screen.
It allows you to have any number of tabs.
One tab can have any number of widgets.

A widget is the basic module of the OSD which can draw anything on screen. Most of the widgets look is based on minimosd and minimosd-extra "panels".

The font for the max7456 can be uploaded using the rudimentary tool located in tools/osdtool (linux only). The font itself is also located in the same place (tools/osdtool/charset.mcm).
Alternatively you can upload it in windows using the FW/tools from minimosd or minimosd-extra.
(the latest minimosd/minimosd-extra charset should fine).

Configuration

Right now the configuration is done modifying the firmware/src/config.h Available config options (most of them self descriptive):

  • CONF_VEHICLE = [APM_PLANE, APM_COPTER]
  • CONF_MAVLINK_BAUDRATE = <baudrate>
  • CONF_MAX_TABS = <max_tabs>
  • CONF_TABSWITCH_METHOD = [TAB_SWITCH_PERCENT, TAB_SWITCH_TOGGLE, TAB_SWITCH_PUSH, TAB_SWITCH_DEMO]
  • CONF_TABSWITCH_CH = [RSSI_CH<1-8>, RSSI_ADC<0-7>]
  • CONF_TABSWITCH_CH_MIN = <min_pwm>
  • CONF_TABSWITCH_CH_MAX = <max_pwm>
  • CONF_DEFAULT_UNITS = [LENGTH_UNITS_METRIC, LENGTH_UNITS_METRIC] | [TEMPERATURE_UNIT_CELCIUS, TEMPERATURE_UNIT_FAHRENHEIT]
  • CONF_RSSI_SOURCE = [RSSI_SOURCE_RSSI, RSSI_SOURCE_CHANNEL, RSSI_SOURCE_ADC]
  • CONF_RSSI_MIN = <min_rssi>
  • CONF_RSSI_MAX = <max_rssi>
  • CONF_RSSI_UNITS = [RSSI_PERCENT, RSSI_PERCENT]

At the moment widget configuration (tab and location on screen) is done directly at the code in firmware/src/config.c (sorry, no tool yet).

Available widgets

  • AIRSPEED
  • ALTITUDE
  • BATTERY CURRENT
  • BATTERY REMAINING
  • BATTERY VOLTAGE
  • BATTERY VOLTAGE 2
  • CALL SIGN
  • CLIMB RATE
  • COG
  • CLOCK / TIMER
  • FLIGHT MODE
  • FLIGHT STATISTICS
  • FLIGHT TIMER
  • GPS COORDINATES
  • GPS STATUS
  • HEADING
  • HOME ALTITUDE
  • HOME DIRECTION
  • HOME DISTANCE
  • ARTIFICIAL HORIZON
  • PITCH
  • RADAR
  • RC CHANNELS
  • ROLL
  • RSSI
  • TEMPERATURE
  • THROTTLE
  • WAYPOINTS
  • WIND ROSE
  • WIND SPEED
  • (more to come)

TODO (by priority)

  • Finish adding all the widgets available in MinimOSD-extra.
  • Create a configuration tool (windows/linux).
  • Fix bugs
  • (...)

Building

  1. Make sure you have avr-gcc and companions installed
  2. Clone git repository to your local disk
  3. Get to ./firmware/
  4. Type 'make'
  5. Burn the flash 'make flash'
  6. Burn eeprom: 'make eeprom'

You may need to edit Makefile to correctly setup your AVR programmer.
You should also set the fuse that preserves eeprom throught a flash erase cycle.
The following fuse setting should be fine:
``` avrdude -c usbasp -p m328p -U lfuse:w:0xff:m -U hfuse:w:0xd1:m -U efuse:w:0x05:m ```

Pull requests are welcome.


max7456 resolution (For reference)
PAL 16 Rows x 30 Chars
NTSC 13 Rows x 30 Chars