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  VS Arduino › Visual Micro › Usb/Serial/WiFi Debugging › About "ESP32S3-USB-Debugging"
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Normal Topic About "ESP32S3-USB-Debugging" (Read 121 times)
Peter D. Pruyne
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About "ESP32S3-USB-Debugging"
Nov 23rd, 2024 at 7:22am
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This is about this page:
https://www.visualmicro.com/page/ESP32S3-USB-Debugging.aspx

1st, the sentence "If you are looking to use JTAG to debug this board please see the seperate page here." has no link.

2nd, There is an image there connecting a usb-A cable directly to gpio pins on a ESP32-32 dev board.

The host usb is a 5v device, ESP32's are 3v devices.  This is not supported, as described in the datasheets and also discussed on the Esspresif forum, in a thread titled "5V tolerance".
https://esp32.com/viewtopic.php?t=877


My questions:
1 ) What page does the missing link refer to?

2 ) Whats up with sailing past the 3.6v gpio pin limit found in the Esspresif datasheets?   

3) The pictured S3 dev board has two usb interfaces, one labeled UART.  That 2nd usb connection is expressly provided for JTAG access.

I have looked at your debugging examples, I can not find one that uses the USB-UART for JTAG debug.  Perhaps I missed it?   

That what I would like to do.  How do I do that?



  
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Simon@Visual Micro
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Re: About "ESP32S3-USB-Debugging"
Reply #1 - Nov 25th, 2024 at 12:47pm
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1) Documentation page updated and the link referred to the below page, where an external probe is used to connect to the JTAG pins:
https://www.visualmicro.com/page/ESP32S3-JTAG-Debugging.aspx

2) This was following the Espressif documentation:
https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/jtag-de...

Quote:
The quickest and most convenient way to start with JTAG debugging is through a USB cable connected to the D+/D- USB pins of ESP32-S3. No need for an external JTAG adapter and extra wiring/cable to connect JTAG to ESP32-S3.


3) On that board the second USB port provides USB-JTAG which is not always available on every variant of the board.  This is why we show the USB lead connected to the board which would provide the same USB-JTAG access on any board (or even just the module itself).  The on-board USB port is wired to the same IO pins on their schematic (which have the zener diodes for the voltage limiting):
https://dl.espressif.com/dl/schematics/SCH_ESP32-S3-DevKitC-1_V1.1_20221130.pdf

The USB-UART Debugging will work the same just connected via the "USB" port on the board, the driver needs installing for the same interface, and the same Debug selection applies in Visual Micro.
  
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