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Xinyuan-LilyGO / TTGO-T-Display

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Cannot flash new TTGO-T-Display #69

Open cgreening opened 2 years ago

cgreening commented 2 years ago

I've received a new TTGO-T-Display and for some reason, it's not flashing:

I have another TTGO-T-Display board with a dead display that flashes without any problems.

esptool.py v3.1
Serial port /dev/cu.usbmodem527E0006811
Connecting.....
Chip is ESP32-D0WDQ6-V3 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 08:3a:f2:45:34:64
Uploading stub...

A fatal error occurred: Failed to write to target RAM (result was 01070000)
A fatal error occurred: Failed to write to target RAM (result was 01070000)

This is what I see with my old board:

esptool.py v3.1
Serial port /dev/cu.SLAB_USBtoUART
Connecting........_
Chip is ESP32-D0WDQ6-V3 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: c4:4f:33:7f:f5:b1
Uploading stub...
Running stub...
Stub running...
cgreening commented 2 years ago

After installing some drivers on another issue this has progressed, but not much further:

esptool.py v3.1
Serial port /dev/cu.wchusbserial527E0006811
Connecting......
Chip is ESP32-D0WDQ6-V3 (revision 3)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 08:3a:f2:45:34:64
Uploading stub...

A fatal error occurred: Timed out waiting for packet header
A fatal error occurred: Timed out waiting for packet header
cgreening commented 2 years ago

The device also works perfectly on windows so it's definitely an issue with the Mac driver.

coryb commented 2 years ago

I had the same issue, I think the key is /dev/cu.SLAB_USBtoUART which is created by the SiLabs Driver Disk package. I installed this previously for a different esp32 devkit, and this drivers seems to conflict with the usb drivers necessary for the TTGO. I had an application called "CP210xVCPDriver" which was installed by the SiLabs Driver Disk. I moved that application to the "Trash" and was prompted to uninstalled the drivers. After that my TTGO started to work after I reconnected it to my mac.

cgreening commented 2 years ago

Solved my issue with the drivers here: https://github.com/WCHSoftGroup/ch34xser_macos

raybutch commented 2 years ago

I'm having the same problem. I am unable to flash the TTGO T display module. I am looking for a driver to load on my windows 7 computer. Does anyone know of a driver that will work in a windows?

fmgdias commented 2 years ago

Connect Pin 2 to GND.

piperov commented 2 years ago

Similar problem (I think) on a Chromebook. Working in the Linux container, I see a USB device showing up when I connect the TTGO-T-Display board, but no /dev/ttyXXX device gets created.

Conclusion: the USB device on the board fails to be recognized/configured as a Serial Port. Probably a driver issue.

The same procedure, repeated on the same computer, but when running Linux directly on the bare metal, sees a /dev/ttyACM0 created, and then I can program the TTGO-T-Display board, and interact with it in MicroPython (Thonny IDE) without any issue.

Something is fishy with the USB/Serial implementation on the TTGO-T-Display board though. Could it be the same issue discussed in #47 ? (https://github.com/Xinyuan-LilyGO/TTGO-T-Display/issues/47)

mianos commented 2 years ago

You can no longer flash with the CH9102 driver on MacOS Monterey. It sometimes works under Linux. The basic serial port works OK but flashing is hit and miss. I started the kex debugger and it seems to be passing misaligned structures to the API as if it was built with a pre 2018 MacOS driver SDK.

If you have a Windows machine it works 100%. The WCH driver listed above works on some machines pre Monterey.

It is a bit of a fiasco but one way forward is to flash the additional OTA update configuration on a old Windows machine and then use a proper machine to flash it via wifi.