= PowerPIC Operation Guide
:toc: left
include::attributes-urls.adoc[]
A guide to using the PowerPIC Calculator Watch

== Modes

Modes can be cycled through with use of the *Mode* button. The *Adj* button typically does a secondary action such as edit, but this is dependant on the mode.

image:diagrams/mode_sequence.drawio.svg[Static, 50%]


=== Clock
The clock mode attempts to mimic the stock Casio clock.
The clock shows the current time and the day of week.
When the [.nowrap]#( ÷ )# key is pressed, the full date is shown and the day of week.

image:diagrams/clock_usage.drawio.svg[Static, 50%]

==== Setting Time and Date

1. To set the time and date, press the *ADJ* button in the clock mode.

2. Press the ( 0 ) key when editing the seconds to reset to zero.

3. Press the *MODE* button to move the flashing selected digit as shown in the sequence below. +
image:diagrams/clock_edit_sequence.drawio.svg[Static, 50%]

4. A number can be entered by pressing the desired numeral key.

5. Press the *ADJ* button to complete time setting.

NOTE: AM or PM can be selected by pressing the ( PM ) key.

NOTE: 12 or 24 hours format can be selected by the ( + ) key.


=== Alarmclock
The alarm clock attempts to mimic the stock Casio alarm.

Daily Alarm::
The daily alarm can be enabled by pressing the ( 4 ) key in the alarmclock mode. This will make the alarm sound once a day at the configured time.

Hourly Chime::
The hourly chime can be enabled by pressing the ( X ) key in the alarmclock mode. This will make the chime sound every hour on the hour.

image:diagrams/alarmclock_usage.drawio.svg[Static, 25%]

==== Setting the Daily Alarm

1. To set the daily alarm time, press the *ADJ* button in the alarmclock mode.

2. Press the *MODE* button to move the flashing selected digit as show in the sequence below. +
image:diagrams/alarmclock_edit_sequence.drawio.svg[Static, 50%]

3. A number can be entered by pressing the desired numeral key.

4. Press the *ADJ* button to complete the alarm setting.

NOTE: AM or PM can be selected by pressing the ( PM ) key. If the watch is in 24-hour mode this won't do anything.

=== Timer
The timer mode provides a stopwatch and countdown timer.

=== Thermometer
The thermometer modes gives an approximate temperature of the watch PCB.

=== Power
The power mode gives an approximate voltage of the coin cell battery (VCC).

=== Settings
The settings mode gives a very basic interface to edit settings for modes. The settings are stored in EEPROM.

=== Update
The update mode provides an easy way to reboot the watch. By default the watch is reset into the bootloader, allowing firmware updates.

=== Uptime
The uptime mode provides a way to track battery life by giving a number of days since the counter was reset (Battery replaced).


== Settings

Setting[0]::
Configure 12/24 hour clock.
 - 0 - 24-hour clock
 - 1 - 12 hour clock
 - Invalid - Reset to 0

Setting[1]::
RTC calibration value.

Setting[2-3]::
Temperature calibration reading at 25C.
12-bit value stored as two bytes H:L.

Setting[3-4]::
Uptime value stored as full days.
16-bit value stored as two bytes H:L.

Setting[5]::
LCD voltage control.
3-bit value, the high 5 bits are ignored.



== Updates

Updating the firmware can be done without disassembling the watch, provided you have the appropriate cable and software.

=== PowerPIC Watch Clip

 [image of watch clip] [image of watch in clip]


The watch clip can be used to connect the PowerPIC to your computer. It uses the back of the watch for one-wire UART and the mode button for GND.

=== Uploading Firmware

New firmware can be uploaded with `picchick` -- a python utility for uploading code to PICs.

```
picchick -d 16lf19197 -c flipflop -P <port> -f <firmware>.hex
```

Note that if you are building the firmware from source, there is a rule in the makefile to upload the built hex file: +
`make upload`



== Glossary

CasiOS:: The "operating system" that runs on the PowerPIC.

mode:: An application that runs on the PowerPIC.


'''
[.text-center]
[.big]#{link-powerpic-github}[github] | {link-powerpic-docs}[documentation] | {link-powerpic-home}[website]# +
&copy; 2025 Rex McKinnon <[email protected]>