Stopwatch - portapack-mayhem/mayhem-firmware GitHub Wiki
The Stopwatch is a utility app for measuring elapsed time with lap support and configurable millisecond precision display.
This is an External-apps-informations (.ppma file on the SD card).
Display
The stopwatch shows two rows in large digits:
| Row | Label | Color |
|---|---|---|
| TOTAL | Total elapsed time since last reset | Minutes: 🔴 red, Seconds: 🟢 green, Milliseconds: 🟡 yellow |
| LAP | Time of the last lap mark | White |
Time is displayed in the format: MM:SS.mmm
Buttons
| Button | While stopped | While running |
|---|---|---|
| START / STOP | Starts the timer | Stops (pauses) the timer |
| RESET / LAP | Resets the timer to zero | Records a lap time |
| EXIT | Exits the app | Exits the app |
Milliseconds Display Level
When the timer is stopped, an option field in the top right controls how many millisecond digits are shown:
| Setting | Digits shown |
|---|---|
& - - |
1 digit (hundreds) |
& & - |
2 digits (hundreds + tens) |
& & & |
3 digits (full milliseconds) |
This option is hidden while the timer is running to prevent accidental changes.
Notes
- The timer continues accumulating time correctly after a pause — resuming does not reset the elapsed time.
- Lap time is fixed at the moment the LAP button is pressed; the TOTAL counter keeps running.
- Only one lap time is displayed at a time; pressing LAP again overwrites the previous lap.