Re: USB chip CH9102F

> On 14 Sep 2022, at 18:14, CeDeROM <cederom@tlen.pl> wrote:
> 
> On Wed, Sep 14, 2022 at 3:43 PM Daniel Braniss wrote:
>> Hi,
>> is there/will there be any support for this chip? CH9102F.
>> 
>> there is a driver for linux and windows, but event though it sort of works on FreeBSD,
>> the magic needed to flash the firmware on newer esp32’s is not working.
> 
> I also bought USB-C based UART-to-USB adapter from Waveshare with
> CH343G chip and use it for ESP32 flashing.
> 
> This chip is a bit tricky and I have noticed it is less reliable for
> initial flashing on a custom ESP32 board (boot mode selection using
> RTS/CTS pins). It sometimes fails, while older USB-UART converters
> works fine.
> 
> What are your problems exactly?
> 
> Are you sure this is not the custom hardware design issue?
> 
> Do you have Reset and BootSel pins on your board that you can trigger
> by hand in order to help USB-UART cable?
> 
> What is your magic that you need to do in order to flash the chip successfully?
> 
> Does standard operations (UART CLI) work as expected?
> 
> Did you take a look at man stty and use stty crtscts <port> / stty
> -crtscts <port> to see if that fixes anything?
> 
> --
> CeDeROM, SQ7MHZ, http://www.tomek.cedro.info

i have many esp32’s, all the old ones work fine, it’s only the latest ones, for example: m5stac esp3c3 and my latest
batch of m5stack base black v1,26 which i get:

pampa> /vol/src/esp/current/components/esptool_py/esptool/esptool.py -p /dev/ttyU0 read_mac
esptool.py v3.3-dev
Serial port /dev/ttyU0
Connecting...
Failed to get PID of a device on /dev/ttyU0, using standard reset sequence.
.
Detecting chip type... ESP32-C3
Chip is ESP32-C3 (revision 3)
Features: Wi-Fi
Crystal is 40MHz
MAC: 7c:df:a1:a3:61:74
Uploading stub...

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


the fatal error I also get when trying to flash/erase/ etc.


i have some esp32 that have usb, some don’t, some can flash, some need sounding g0, etc,
I can mostly work with them, it’s only the latest batch, which ’seem’ to have this CH9102f that
fail to flash with the above ‘A fatal error …’


BTW, regular connect via usb works, so i get console messages ok.

thanks,

	danny