[ESP32-C2] Are reported flash frequencies correct for ESP32-C2? (ESPTOOL-778)

[TD-er]

Operating System

Windows 11

Esptool Version

latest

Python Version

Python 3.11.4

Full Esptool Command Line that Was Run

No response

Esptool Output

No response

What is the Expected Behaviour?

Recently I added this PR to Arduino/ESP32 repo, which uses the frequencies in esptool.py for the Arduino function magicFlashChipSpeed()

However on further inspection, I notice the SPI bus frequency of the ESP32-C2 is running at 40 MHz, even though I have set the flash frequency to 60 MHz in the board definition and use esptool.py to flash.

See this issue about my concerns regarding the APB/SPI bus frequency.

This makes me wonder if the frequencies mentioned in esptool for the ESP32-C2 are correct.

More Information

No response

Other Steps to Reproduce

No response

[radimkarnis]

Hello @TD-er,
in your recent discoveries, you mention the actual measured frequency is indeed 60 mHz.

Is this issue ticket still relevant? If it is, I will need to check with more developers to be sure.

[TD-er]

Well from an esptool perspective, this no longer seems relevant.
But if you know something to help me find the correct way to read/detect in software the actual registers where the flash freq. can be read or used to compute the actual flash freq. then I would be very interested.