Troubleshooting

In case of any issue with software, read the Troubleshooting section of the CEX PDI Builder user manual.

Forcing maintenance mode

If a mistake was made when building the configuration and communication with the device has been lost, it is possible to force the device to boot into maintenance mode in order to modify its configuration.

There are two ways to force the maintenance mode: using power supply or using the I2C pins.

Power supply

When communication with the unit is lost, it is possible to active maintenance mode by power input.

In order to active maintenance mode, power cycle CEX repetively with periods of 700 ms (with a margin range between 380 and 965 ms). After 30 cycles, CEX will enter in maintenance mode.

I2C pins

To enter in maintenance mode with I2C:

1. Unplug CEX

2. Connect both I2C pins each other

3. Then, power up CEX

4. Finally, disconnect both pins

Both pins are I2C SCL (number 20) and I2C SDA (number 21) according to the pinout.

Note

Veronte Avionics: Dev Harness CEX 2.0 (Embention reference P006140) has already included a button with this 2 pins to easily enter maintenance mode.

The procedure is the same as for the pins, but instead of connecting and disconnecting the pins, press and release the button.