2022-03-30 03:04 PM
2022-03-30 03:39 PM
The question here is really poorly framed. Some context?
The stand-alone ST-LINK/V2 doesn't have a serial port (VCP)
The on-board ST-LINK/V2-1 and assorted ST-LINK/V3 do have a serial port.
The boot loader protocol and usage for STM32 are covered in app notes AN3155 and AN2606 as I recall.
Perhaps review these, and provide some more details about what it is you're trying to do, and what you've tried or experimented with so far.
2022-03-31 06:43 AM
Actually, I just want to make my own programmer circuit for STM32G474RET6 MCU.
Problem: I do not want to just programming and debugging like ST-Link. I want to read data from serial port too. But ST-link doesn't have any RX/TX pins for that.
Any idea for this programming circuit? Really apriciated.
2022-03-31 06:45 AM
I mean programming STM32G474 from programming circuits. Programming circuit could be has a STM32F103.
2022-03-31 08:32 AM
>>Problem: I do not want to just programming and debugging like ST-Link.
So which is it?
Do you, or don't you want to use SWD/JTAG methods?
Do you want to use the System Boot Loader, per AN3155, ie serial protocol?
You want to just use a serial connection? So a SiLabs or FTDI USB to CMOS Serial chip would suffice? Or implement a VCP/CDC USB Device on an STM32
You want some other chip to program? Here's an example of an ATMEL/MICROCHIP MCU programming an STM32L0 in a Murata LoRa module, using the methods outlined in AN3155
2022-03-31 08:43 AM
2022-03-31 03:15 PM
Thank you so much for advice I will work on it.