BASIC-programmable devices supplied by Tibbo have one or two pairs of LEDs (or lines to control them).
Devices with 2 pairs of LEDs
On such devices, the first LED pair is comprised of green (SG) and red (SR) status LEDs, the second pair -- of green (EG) and yellow (EY) Ethernet LEDs.
Status LEDs have multiple functions:
| • | When the device is in the firmware upgrade mode, these LEDs indicate the status of the firmware upload process. |
| • | When the device is under TiOS firmware control and Tibbo BASIC application is not running, these LEDs show current Tibbo BASIC application status. |
| • | When the Tibbo BASIC application is running, status LEDs are under the control of the pat. object. |
The following table summarizes predefined status LED patterns:
Firmware upgrade mode
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Green LED blinks slowly
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File upload completed successfully.
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One long and one short "blink" of red LED
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Communications error encountered during the serial file transfer.
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One long and two short "blinks" of red LED
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FLASH memory failure.
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Normal operation, Tibbo BASIC application not running
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Fast-blinking GRGRGR... pattern
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TiOS firmware not loaded or corrupted.
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Fast-blinking BBBB... pattern (B= red and green together)
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Tibbo BASIC application loaded but cannot run due to insufficient variable (RAM) memory
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Fast-blinking G-G-G-... pattern
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Tibbo BASIC application loaded but not running.
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Fast-blinking R-R-R-... pattern
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Tibbo BASIC application not loaded or corrupted.
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Ethernet LEDs indicate the following:
| • | Link/Data LED (green) is turned on when live Ethernet cable is plugged into the device. The LED blinks whenever an Ethernet packet is received. |
| • | 100BaseT LED (yellow) is turned on when the device links with the hub at 100Mb. The LED is off when the link is established at 10Mb. |
Devices with a single LED pair
On such devices, there are green (SG) and red (SR) status LEDs (or lines to control them). They function just as described above, but with one caveat: the brightness of these LEDs is indicative of the current Ethernet link state. When live Ethernet cable is not plugged into the device, the LEDs "play" patterns at a reduced brightness. When live Ethernet cable is plugged into the device, the LEDs "play" patterns at full brightness.
On devices with a single LED pair, there is no indication for the 100BaseT/10BaseT connection mode.
Some such devices feature a single third LED (or line to control it). This LED indicates current Ethernet link status: it will be on when live Ethernet cable is plugged.