Invalid EEPROM context - iMX93 QSB

[emb-dev]

I am using iMX93 QSB with latest firmware ; Linux 6.6.36_2.1.0

I want to measure power of the Board using bcu tool, I am facing this error:

Please share how to resolve this

bcu eeprom -w -board=imx93evk11

--------------------------------------------------

Then you can choose to replace option <-board=> with <-auto>.

NOTE: If other boards are also connected to the same host, <-auto> may break its ttyUSB function temporarily.

pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_write_bipolar: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack pac1934_snapshot: pac 1934 failure get ack PAC1934 cannot access!

done

bcu eeprom -w -board=imx93evk11

---------------------------------------

version bcu_1.1.52-0-g17ab144 board model is imx93evk11

>>>>>> Registered FTDI EEPROM on board >>>>>>

Invalid EEPROM context, use -w option to write the default values.

done

[emb-dev · Accepted solution]

Hi I tried this on Windows, with my iMX93 QSB

bcu eeprom -w -board=imx93evk11

--------------------------------------

version bcu_1.1.100-0-gc34d89b

board model is imx93evk11

>>>>>> Registered FTDI EEPROM on board >>>>>>

Invalid EEPROM context, use -w option to write the default values.

done

bcu eeprom -r -board=imx93evk11

---------------------------------------

version bcu_1.1.100-0-gc34d89b

board model is imx93evk11

>>>>>> Registered FTDI EEPROM on board >>>>>>

Invalid EEPROM context, use -w option to write the default values.

done

I also tried this on an Ubuntu 22 Host. with my iMX93 QSB

sudo bcu eeprom -w -board=imx93evk11

--------------------------------------------------

version bcu_1.1.100-0-gc34d89b

board model is imx93evk11

>>>>>> Registered FTDI EEPROM on board >>>>>>

No EEPROM

Checksum Error: aaaa ffff

ftdi_eeprom_decode: -1 (EEPROM checksum error)

Erase failed: No connected EEPROM or EEPROM type unknowndone

sudo ./bcu monitor -board=imx93evk11

----------------------------------

I am facing the same issue "pac1934_write_bipolar: pac 1934 failure"

If I run board= imx93qsb

sudo ./bcu monitor -board=imx93qsb

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Gives me Capture time, but does not give the Current and Power

[Manuel_Salas]

Hello @emb-dev 

This is expected, because in the imx93EVK board we have Current monitors to measure the lines:

Alejandro_Salas_0-1730426097362.png

You can refer to the i.MX93EVK schematics on page 12.

The QSB has not those current monitors, but it has the PCA9655EMTTXG port expander, that it can control the BOOT_MODE, Reset pines to reset board and boot from an specific device.

If you want to measure the lines I recommend to you to use the i.MX93 EVK (A0 or A1 are supported in BCU).

I hope this information can helps to you.

Best regards,

Salas.

[emb-dev]

Hi Alejandro,

I see now, Thanks for the clarification.

[Manuel_Salas]

Hello @emb-dev 

I hope you are doing very well.

Please try with the below commands:

$ sudo bcu eeprom -w -board=imx93qsb
$ sudo bcu eeprom -r -board=imx93qsb
$ sudo bcu monitor -board=imx93qsb

Best regards,

Salas.