Issues with connecting with st link board to stm32f103c8t6(Update)[resolved]

[BFage.1]

So I just recently got an stm32f103c8t6, and I was able to connect to it with the serial pins connected to pins A8 and A9, but for whatever reason, I was not able to get it to connect with the St link v2 that I also ordered. For connections, I connected 3v pin to pin 1, as labeled in the user manual for the st link, ground to 20(power was working and the onboard power LED was on), SWIO to 7 and SWCLK to 9. I was unable to find a video of someone using the official st link online, as basically every video used a knockoff board. Is there something I'm not doing right?

Update, I was able to connect with stm32cubeprogrammer, but not write. I am able to connect with these settings:

SWD

4000khz

hot plug

software reset

I can see the contents of the memory, but I am not able to write to them. Can someone explain what I am doing wrong?

[BFage.1]

I'm writing this comment so that it can hopefully get shot up to the top and someone will see it

[Tesla DeLorean]

Does it give some kind of error?

Option Bytes, Write Protected?

Can you erase the part?

The file write is in a different pane, ST-LINK Utilities has a somewhat better interface.

[BFage.1]

here is what ST-link utility gives me:

16:27:08 : ST-LINK SN : 36FF6A065250343813470343

16:27:08 : V2J35S7

16:27:08 : Connected via SWD.

16:27:08 : SWD Frequency = 4,0 MHz.

16:27:08 : Connection mode : HotPlug.

16:27:08 : Debug in Low Power mode enabled.

16:27:08 : Device ID:0x410

16:27:08 : Device flash Size : 128KBytes

16:27:08 : Device family :STM32F10xx Medium-density

16:27:17 : [blinkOnboardLED.bin] opened successfully.

16:27:17 : [blinkOnboardLED.bin] checksum : 0x00067F26

16:27:21 : Unexpected error

16:27:23 : Can not connect to device!

16:27:24 : Disconnected from device.

16:27:24 : Connection to device is lost: check power supply and debug connection.

16:27:24 : If the target is in low power mode, please enable "Debug in Low Power mode" option from Target->settings menu.

And here is what STM32CubeProgrammer gives me:

16:28:37 : ST-LINK SN : 36FF6A065250343813470343

16:28:37 : ST-LINK FW : V2J35S7

16:28:37 : Voltage : 1.56V

16:28:37 : SWD freq : 4000 KHz

16:28:37 : Connect mode: Hot Plug

16:28:37 : Reset mode : Software reset

16:28:37 : Device ID : 0x410

16:28:37 : UPLOADING OPTION BYTES DATA ...

16:28:37 : Bank : 0x00

16:28:37 : Address : 0x4002201c

16:28:37 : Size : 8 Bytes

16:28:37 : Bank : 0x01

16:28:37 : Address : 0x1ffff800

16:28:37 : Size : 16 Bytes

16:28:37 : UPLOADING ...

16:28:37 : Size : 1024 Bytes

16:28:37 : Address : 0x8000000

16:28:37 : Read progress:

16:28:37 : Data read successfully

16:28:37 : Time elapsed during the read operation is: 00:00:00.012

16:28:47 : Memory Programming ...

16:28:47 : Opening and parsing file: blinkOnboardLED.bin

16:28:47 : File : blinkOnboardLED.bin

16:28:47 : Size : 4652 Bytes

16:28:47 : Address : 0x08000000 

16:28:47 : Erasing memory corresponding to segment 0:

16:28:47 : Erasing internal memory sectors [0 4]

16:28:47 : Error: failed to erase memory

16:28:47 : Error: failed to erase memory

16:28:47 : RUNNING Program ... 

16:28:47 : Address: : 0x08000000

16:28:47 : Warning: The core is halted

16:28:47 : Start operation achieved successfully

[Tesla DeLorean]

Custom board?

The 1.56V reported seems inadequate, write/erase will need proper powering.

[BFage.1]

I'm not sure how to set that, but I have the voltage hardwired to the 3.3v port on the St link v2, I believe it's pin 19​

[Tesla DeLorean · Accepted solution]

It is reporting the voltage observed at Pin 1

Pin 19 should be 3.3V, but not sure the the load it is allowing for.

Get a scope or meter and check it. Make sure the grounds are bonded.

Perhaps try using a bench supply.

[BFage.1]

Update: I was able to flash the memory, by connecting pin 1 to the voltage and powering over USB. Thanks for the help!