Troubleshooting

This section describes some of the common issues that can arise when using the mezzanine card.

VADJ not 1.2V #

Problem: #

The VADJ voltage applied to the FMC by the carrier card is not 1.2V (verified by probing the VADJ test point on the FMC).

Solutions: #

If using UltraZed-EV Carrier or PYNQ-ZU , the fixed 1.8V VADJ provided by these boards is acceptable. You do not need to do anything else.

If using ZCU104 , ZCU102 or ZCU106 , an incorrect VADJ voltage may indicate that you have an issue with the EEPROM contents of your RPi Camera FMC. This can be fixed using the latest Opsero FMC EEPROM Tool.

If your RPi Camera FMC has a serial number in the range of 680110-680139 or 680150, you will need to update it’s EEPROM contents by using the latest Opsero FMC EEPROM Tool.

Explanation: #

In most use cases, the FMC carrier board should power VADJ at 1.2V. The exceptions are when using the UltraZed-EV Carrier or the PYNQ-ZU board, in which case the fixed 1.8V provided by these boards is acceptable.

When using ZCU104 , ZCU102 or ZCU106 , the system controller on these boards will read the EEPROM on the RPi Camera FMC and apply a VADJ voltage that corresponds to the information that is found in the EEPROM. Normally, the RPi Camera FMC is programmed to request a VADJ voltage of 1.2V. However on the boards with serial numbers listed above, the EEPROM data is incorrect and should be fixed using the Opsero FMC EEPROM Tool.

If you cannot use the EEPROM tool, an alternative solution to this problem is to connect with your development board’s system controller (typically over USB-UART) and manually set the VADJ voltage to a fixed value of 1.2VDC.