How can use st-link as a uart for STM32L072CZ ?

[PPati.18]

How can use st-link as a uart for STM32L072CZ ......?

We have CMWX1ZZABZ-091 LoRa module, this module contain STM32L072CZ mcu.

When we connect this module using STLINKv2, com port is not showing.

I could not able to do programming to this module.

How can we program this module, can any one help me ?

Following ST Link v2 i am using

CMWX1ZZABZ-091 LoRa module

Thanks.

[Uwe Bonnes]

First, you have an Stlink clone, not a STM genuine one. Look at the print on the clone and connect clone TX to target RX and vice versa. If you want a known working setup, get a STM32 LoRa Discovery kit.

[Tesla DeLorean]

The ST-LINK V3 provides a serial port.

You could use a USB to CMOS Serial type adapter or use a MAX3232 type chip to get to RS232 levels.​

[S.Ma]

Not an ST STLink V2, looks like anyone can use ST logo these days...

Here is the right one:

 

The 20 pin JTAG connector has USART pins wired.

Same for STLinkV3

[Uwe Bonnes]

Those clones like the one above are clone the Stlink of a STlink V2 as on a nucleo board. So Uart is implemented.

[Tesla DeLorean]

Some of them are V2-1​ models, the OP says he doesn't get a VCP, so I lean against that.

​

I'm using the V3 with these Murata devices.​