Part Number: AM5728
I have problems troubleshooting my custom design using AM5728. I designed by following AM572x Evaluation Board (SOM + Motherboard). We removed some interfaces (sata, PCIE, audio etc.) which were not used during the design. However, we are having trouble in the boot part. We have not yet been able to detect whether the problem is software or hardware.
First of all, we checked the power supplies and power-up sequence. We are sure that the PMIC is at the correct voltage levels. Then we checked the reset signals on the system and verified them all.
We realized the sysboot pins in the current design. When we try to uboot operation from SD card, we could not get any messages from uart3 debug. After this process, we added the necessary information to the eeprom on the electronic card (device name, device id etc.). When we tried to boot from SD card, we could not get any messages from uart3 again.
When the SD card failed in the boot process, we thought to boot via uart3. We set the sysboot[5: 0] pins to the required logic levels. We regularly read the “VA!” message on the console from uart3. However, when we try to send the SPL with the serial-boot.pl file, we get an error in the ASIC ID reading function. I think we can't read ASIC ID. Since we could not install the SPL, we are therefore unable to go to the U-Boot installation phase.
Additionally, when we measure current from the main system input, we measure 200-250 mA when the processor is in the reset (PORZ) state and 650-700 mA when the processor is not in the reset state.
In addition to all these, we have examined the discussion links mentioned below, but we have not been successful.
Discussion Links:
