What follows is the operating manual for version 2 of the fast clock firmware. Version 1 is obsolete and should no longer be used.
''Note to conventions: Buttons to be pressed are in BLUE, things the screen can display are in GREEN.
The fast clocks have three discrete modes:
- Fast Clock
- Real Clock
- Configuration
These are fairly self-explanatory. To switch from one to the other, hit the MODE key. The screen will then display the mode you're currently in, either FAST, REAL, or CONF. You can then cycle through the modes by using the CHANGE key. Once you arrive at the mode you want, press the SET key to select it.
Pausing Fast Time
Since usually setting up the fast clock is part of the preparatory work for an operating session, usually you don't want fast time starting to pass as soon as you go into FAST mode. So, the clock always comes up in HOLD when you go into FAST mode.
To unpause the clock (make it display fast time and start ticking away), press the CHANGE key while the display shows HOLD.
To pause the clock again (put it in HOLD), press the CHANGE key again while the display is showing the current fast time.
As a note, while in HOLD, you can adjust the current fast time.
Adjusting the Fast Time
While in FAST mode, you may want to adjust the time that the clock displays. This is not permanent, and only affects the current state of the clock
Press SET once, and you'll see the clock allow you to adjust the hours. Pressing CHANGE will increment the hours.
Press SET again, and you'll see the clock allow you to adjust the minutes. Pressing CHANGE will increment the minutes. Hit SET one last time to save the change and return to fast clock mode.
If you built your master with the DS1306 (see the FAQ about omitting it), you won't have REAL mode. Otherwise, selecting REAL will display the actual time, as set in the clock.
Adjusting the Real Time
The only thing you can do in REAL mode is to set the clock. This is done the same way you change the time on the fast clock, except for that when saved, it writes the time out to the DS1306 so that it will be saved while the clock is busy doing other things or is powered off.
Press SET once, and you'll see the clock allow you to adjust the hours. Pressing CHANGE will increment the hours.
Press SET again, and you'll see the clock allow you to adjust the minutes. Pressing CHANGE will increment the minutes. Hit SET one last time to save the change and return to real clock mode.
Configuration (CONF) mode allows you to configure various features of the clock. Once you enter CONF mode, you have to cycle through all settings using the MODE key. After you've cycled through all of the configuration paramters, you'll be returned to the mode selection menu.
On any given setting, you can use the CHANGE key to alter the setting and the SET key to save your selection (the colon will blink to acknowledge your save). If you change something but do not push the SET key, your change will not be saved.
The hours characters on the screen (leftmost two) indicate what parameter is being changed. The minutes characters (rightmost two) indicate the current value. In the list below, the value is always shown as ??, but this will never actually display on the clock. It just indicates that something will be there, depending on your selection.
| Screen | Parameter | Description |
|---|
| Sh:?? | Starting Hour | This is the hour that the fast clock will initialize to on each new run. Always set in 24-hour time, but the display will vary depending on whether the clock is in 12/24 hour mode. If you want the clock to start at 06:15, put 06 here.
Values: 00-23 hours |
| Sn:?? | Starting Minute | This is the minutes that the fast clock will initialize to on each new run. If you want the clock to start at 06:15, put 15 here.
Values: 00-59 minutes |
| SF:?? | Scale Factor | This is the scaling between real time and fast time for your clock, expressed as ??:1. So, if you pick 60, that would be a ratio of 60:1, meaning that for every 1 real minute, 60 fast minutes would elapse.
Values:
1 = 1:1, 2 = 2:1, 3 = 3:1, 4 = 4:1
6 = 6:1, 8 = 8:1, 10 = 10:1, 12 = 12:1
16 = 16:1, 20 = 20:1, 24 = 24:1, 30 = 30:1
32 = 32:1, 36 = 36:1, 40 = 40:1, 60 = 60:1 |
| ST:?? | 12/24 Hour Display | The clock can display time in 12-hour mode with an AM/PM indicator(12:00AM-11:59AM, 12:00PM-11:59PM), or in 24-hour (00:00-23:59) mode. This affects both the fast clock and real.
Values:
* 12 = 12 hour mode
* 24 = 24 hour mode |
