Fix being unable to flash certain C5 chips

[jaylikesbunda]

Description

Could not flash my C5 with esptool-js and wanted to fix it for myself and other customers.

Related

espressif/esptool@81bdb76
espressif/esptool#1140

Testing

flashed all my c5 variants to make sure it didn't regress compatibility

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[brianignacio5]

LGTM

[TD-er]

Just a question, to help me understand...
Was the original value also a valid value, but then for pre-production silicon? (or a first revision)
Or was it just a copy/paste error or a typo?

[brianignacio5]

I think it was a valid value for older boards.

[TD-er]

I think it was a valid value for older boards.

Then both should be checked, right?

[brianignacio5]

Seems that esptool master is just using this values for all C5 targets unlike C61 which uses multiples values depending on board revision.

I might be wrong and it was not working for previous board but was not tested.

[jaylikesbunda]

I think it was a valid value for older boards.

Then both should be checked, right?

can confirm it still works with v1.1 and v1.2 devkits fine

[TD-er]

Since it has been merged, I assume this code is already online here right?

When using the USB to UART port:

esptool.js
Serial port WebSerial VendorID 0x10c4 ProductID 0xea60
Connecting...
Detecting chip type... ESP32-C5
Chip is ESP32-C5 (revision v1.0)
Features: Wi-Fi 6 (dual-band),BT 5 (LE)
Crystal is 48MHz
MAC: 30:ed:a0:e4:23:24
Uploading stub...
Running stub...
Stub running...
Flash ID: 0
WARNING: Failed to communicate with the flash chip,
                                                   read/write operations will fail.
                                                                                   Try checking the chip connections or removing
        any other hardware connected to IOs.
Configuring flash size...
Could not auto-detect Flash size. defaulting detect
Detected flash size set to 4MB

This is one with a 4017 flash (vendor 0x20)

[TD-er]

Ah nevermind, with the 'Show debug log' checked, I can see I have the same Chip Magic as in the merged commit:

Debug: Chip Magic 5fd1406f
Detecting chip type... ESP32-C5
Chip is ESP32-C5 (revision v1.0)
Features: Wi-Fi 6 (dual-band),BT 5 (LE)
Crystal is 48MHz
MAC: 30:ed:a0:e4:23:24
Uploading stub...