Timer Setup and Configuration

Timer Setup and Configuration Commands

The firmware is "soft configurable" for several hardware options. I've written a MS Windows program to set up and configure the firmware. You can download the excutable here or a zip file containing it here. The settings are stored in the EEPROM on the timer, so you should only have to perform the setup once.

The setup commands are documented below, in case you cannot use the setup program for some reason, or are just curious about how it works.

String	Command	Action
zap	Enter configuration mode	Puts the timer into configuration mode. Only configuration requests will be accepted until configuration mode is exited, or the board is powered off. Normal race commands not processed and the timer is not in a normal operating mode. Only the setup commands listed below are accepted. This command must be in lower case. Capital ZAP will be ignored. This sequence was chosen because none of the letters correspond to a normal race command. You can think of it as a setup password if you wish. If this command is received by the timer during a race, the race will be interrupted.
The following commands must be in UPPER CASE (ALL CAPS).
X	Exit configuration mode	Puts the timer back into normal operating mode.
Finish Line Sensor Triggering Configuration
F1	Finish triggered on pin high	A finish is triggered when the input pin from the finish line goes high (+5v). The normal (sensor illuminated) state is low (0v/gnd.)
F0	Finish triggered on pin low	A finish is triggered when the input pin from the finish line goes low (0v/gnd). The normal (sensor illuminated) state is high (+5v.)
F?	Get Finish mode	Timer will return F0 or F1 to indicate one of the above states
Race Timeout Configuration
Txxx	Set race Timeout	Must be T followed by 3 digits. Sets the timeout after which the timer will end a race even if not all lanes have finished. Set to 000 to disable this timeout. Valid values are 001 to 255.
T?	Get race Timeout	Timer will return the timeout in the format Txxx where each x is a digit 0 - 9
7-Segment LED Display Configuration (Display settings only apply to the 16F877A advanced timer version)
S1	Segments are active high	This incates that the timer should set a segment pin high (+5v) to turn on that LED segment. The off state for the segment is low (0v/gnd)
S0	Segments are active low	This incates that the timer should set a segment pin low (0v/gnd) to turn on that LED segment. The off state for the segment is high (+5v)
S?	Get Display Segment mode	Timer will return S0 or S1 to indicate one of the above states
D1	Digit Select is active high	This incates that the timer should set a digit select pin high (+5v) to turn on that LED digit. The off state for the digit is low (0v/gnd)
D0	Digit Select is active low	This incates that the timer should set a digit select pin low (0v/gnd) to turn on that LED digit. The off state for the digit is high (+5v)
D?	Get Digit Select mode	Timer will return D0 or D1 to indicate one of the above states

String

Command

Action

zap

Enter configuration mode

Puts the timer into configuration mode. Only configuration requests will be accepted until configuration mode is exited, or the board is powered off. Normal race commands not processed and the timer is not in a normal operating mode. Only the setup commands listed below are accepted.

This command must be in lower case. Capital ZAP will be ignored.

This sequence was chosen because none of the letters correspond to a normal race command. You can think of it as a setup password if you wish. If this command is received by the timer during a race, the race will be interrupted.

The following commands must be in UPPER CASE (ALL CAPS).

Exit configuration mode

Puts the timer back into normal operating mode.

Finish Line Sensor Triggering Configuration

Finish triggered on pin high

A finish is triggered when the input pin from the finish line goes high (+5v). The normal (sensor illuminated) state is low (0v/gnd.)

Finish triggered on pin low

A finish is triggered when the input pin from the finish line goes low (0v/gnd). The normal (sensor illuminated) state is high (+5v.)

Get Finish mode

Timer will return F0 or F1 to indicate one of the above states

Race Timeout Configuration

Txxx

Set race Timeout

Must be T followed by 3 digits. Sets the timeout after which the timer will end a race even if not all lanes have finished. Set to 000 to disable this timeout. Valid values are 001 to 255.

Get race Timeout

Timer will return the timeout in the format Txxx where each x is a digit 0 - 9

7-Segment LED Display Configuration (Display settings only apply to the 16F877A advanced timer version)

Segments are active high

This incates that the timer should set a segment pin high (+5v) to turn on that LED segment. The off state for the segment is low (0v/gnd)

Segments are active low

This incates that the timer should set a segment pin low (0v/gnd) to turn on that LED segment. The off state for the segment is high (+5v)

Get Display Segment mode

Timer will return S0 or S1 to indicate one of the above states

Digit Select is active high

This incates that the timer should set a digit select pin high (+5v) to turn on that LED digit. The off state for the digit is low (0v/gnd)

Digit Select is active low

This incates that the timer should set a digit select pin low (0v/gnd) to turn on that LED digit. The off state for the digit is high (+5v)

Get Digit Select mode

Timer will return D0 or D1 to indicate one of the above states

These settings are saved in the EEPROM on the chip, and should only have to be done once. They will be remembered even if the timer is powered off for months (or years). This is a one-time setup, and should never have to be done again, unless you program new firmware on to your chip, which would probably erase everything. Most PIC programmers, including ICPROG, erase the EEPROM when they load a program to the chip.