Alternate firmware for the FG-100 function generator
The FG 100 is a cheap function generator widely available on Ebay.
See https://hackaday.io/project/7985-alternate-firmware-for-fg-100-dds-function-gen for details
You will need:
- Obviously a FG-100 (ebay is a good source)
- ATMega328p 28pin DIP microcontroller
- AVR programmer/ISP (the Makefile defaults to using a USBTiny ISP)
- AVR toolchain (eg avr-gcc, avrdude and gnumake) installed
If you are using a different programmer you will need to update the Makefile with the currect programmer code for AVRdude, update the AVRDUDE_PROGRAMMER parameter with the correct value for your programmer (see AVR dude documentation for info).
Note: for bleeding edge development (that may be broken), get the ng-dev branch.
All development was completed on GNU/Linux so all instructions relate to this OS (feel free to generate a project file for AVRStudio and send me a pull request ;) ).
Steps to build/upload/set correct fuses:
> make program
If you prefer to do the steps separately:
# Compile/Link/Generate Hex
> make hex
# Upload to ATMega
> make upload
# Set correct fuses
> make fuses
Finally open up the FG-100, unscrew the LCD and pull out, remove the ATMega48 from it's socket, replace with your newly flashed ATMega328p, replace the LCD.
Ready to rock.
~ Enjoy!