- cmake
- avr-gcc
- avr-libc
- avrdude
There are a couple of #define values at the beginning of src/main.c to set up the gate.
| Value | Description |
|---|---|
| AVCC | Voltage on the AVCC pin (must be measured with a multimeter) |
| VIN1 | The output pin goes high if voltage on the input pin becomes higher than this value |
| VIN2 | The output pin goes low if voltage on the input pin becomes lower than this value |
-
The difference between VIN1 and VIN2 (VIN1 > VIN2) defines the depth of hysteresis between output transitions.
-
The output pin can be inverted via the OUT_INV option.
To build, run (with your own MCU):
cmake -B build -D MCU=ATMEGA32U4
cd build
make
To install on the device using AVRDUDE, run (with your own programmer):
make PROG=usbasp flash
or for Teensy 2.0:
make flash-teensy
| Pin | I/O | Description |
|---|---|---|
| PF4 (PC4) | AIN | Input |
| PD7 | OUT | Output |
| PD6 (PB5) | OUT | Status LED |
Pins in brackets pertain to 32-pin devices, i.e. ATmega88/168/328/etc.