TPS65988EVM: Unable to restore board to default values

Hello,

There appears to be a hardware issue with the onboard flash.  Do you have a way to monitor the communication between the TIVA processor and the onboard flash (eeprom)?  Please capture the waveforms and if possible attempt on another EVM.

Thanks and Regards,

Chris

Chris,

I'm using FTDI interface. I don't think there is a TIVA processor on the board....

Roy,

Ok.  Can you capture the communication between the FTDI chip and the EEPROM?

Thanks,
Chris

Hello Roy,

Are you using this mechanism described in the user guide?

https://www.ti.com/lit/ug/slvub60c/slvub60c.pdf#page=22

Thanks,
Chris

Yes, exactly so.

Roy

(1) Yes, it returns APP

(2) Switch 2 positions 4 - 6

  4 - Off
  5 - Off
  6 - On

Switch 6 On - 011b (090) BP_NoWait)

Hi Roy, 

Chris is out of office and will return 10/10.

Thanks and Regards,

Raymond LIn

Raymond, I appreciate the message. However, I'm way behind on my ability to recommend the TPS65988DH to my people because I cannot get the evaluation board to function. I have had no satisfactory answers. Many responses were asking me questions that were answered in an earlier email.

I need help. If I have a defective board, I'll get a new one. If I'm doing something wrong, tell me.

Roy

Hi Roy, 

Have you checked through the Adapter settings in the GUI if the device (FTDI) is available to use and if it is able to properly sweep and find the I2C address of the PD controller as well as the flash?

Are you able to flash the EVM with any configuration or does the error message continuously pop up? 

Thanks and Regards,

Raymond Lin

Raymond, I have covered this. The FTDI settings are in fact correct to the best of my knowledge. I am able to sweep and find the addresses 0x20 and 0x24, and perform the test reads successfully. I am unable to flash the EVM, period.

Also, please note that I have tried swapping out the FTDI board from the TPS65988, and replacing it with the TIVA board from the TPS65988DJEVM. Once again, I can perform the sweep and the tests, but cannot go any further.

Hello,

I do not see any issues with what you are doing and would recommend ordering another EVM.  Let us know if you experience the same issue with multiple EVMs.

Regards,

Chris

I have ordered a new TPS65988EVM for delivery tomorrow morning. Would you suggest I continue with the TIVA interface or leave the board with the FTDI interface?

Thank you very much,

Roy

Hello,

I would recommend leaving the board with the FTDA interface.

REgards,

chris

Hi Chris,

Ok, I did. Not only that, I removed all drivers, uninstalled the program, reinstalled the program, and rebooted the Windows 11 system.

I then carefully connected the board, and followed the following steps:

1. Started app

2. Selected new project, TPS65988DH, and Upward facing port only

3. Configured the adapter as FTDI, scanned for all ports, and saw ports 20 and 24

4. Tested port 20 with all three tests, and received the appropriate response

5. Attempted to write project data to device ram using port 20, tested the port and recevied APP,attempted to write and received the following error:

Exception Encountered reading from device ***error in FTDI call (i2c_devicewrite) status: 2 <type 'exceptions.Exception'>

Details:

Traceback (most recent call last)

file "DialogWindow.pyc", line 9772, in import_config

file "device_rw.pyc",line 707, in read_reg

file "hw_interface.pyc", line 417, in hw_i2c_write_no_stop

file "ftdi.pyc", line 615, in ftdi_i2c_write

Exception

Please note that all switches and jumpers were left as the board was received from DigiKey, in a sealed container. System power is being supplied by a 20 volt highly regulated DC supply.

I can swap to the TIVA communications board, but that means snapping off the FTDI board, leaving me with a board that I cannot return.

Roy

As always, I'm able to read from the device ram and save it to global settings. Also, I can do a binary read to a file of my choice. When I attempt to write to flash with the file that I just saved in the previous step, I read the current region offsets and get an invalid region pointers error, and it defaults to the region 0 address of 0x2000 and the region 1 address of 0x20000. When I click ok to initiate the write, the app hangs on "erasing device" for a long time. Realizing that this step can take a while, a let the system sit for 15 minutes. Still no response and no green progress bar. I finally aborted the process, and the app did not respond, forcing me to quit the app and restart.

The next step was to restart the app, go through all of the previous steps, and try to manually erase flash. This also failed, with no green progress bar.

I then moved the project to another Windows 11 machine with the same results.

I'm lost.

Roy,

I am still investigating on my side.  I cannot find any description about the S5 switch on the EVM.  This appears to connect the FTDI to the SPI flash.  Can you confirm the settings?

Chris

Hi Chris,

Switch 5 has all switches "ON"

Switch 3 has all switches "OFF"

Switch 4 has both switches "ON"