2025-12-16 11:48 AM
Hi does anybody know how to locate the nRST, pin on a GT2p, control board? When I connect st link it says UR connection needs SWrst which says I need to find the nRST, pin. to connect another wire that goes from St link, v2, clone
to the nRST, pin or button on the GT2p, control board. I can take a picture of what the PCB, looks like in about an hour? Thanks
2025-12-16 11:53 AM - edited 2025-12-16 11:55 AM
First identify the chip and look at the datasheet to see which pin is NRST.
On commercial products, the chip may be locked in RDP level 2 in which case ST-Link will be unable to connect. Contact the manufacturer to find out that info.
What are you trying to do?
2025-12-16 7:55 PM
Stm32F405 I’m trying to change the
serial number to a Chinese serial number so I have all the bells and whistles and lights
2025-12-18 7:04 PM
The Chip is a STM32F405RGT6. If the ST link won’t work on it what do I do. When I connect to the cube programmer it says UR connection SWrst mode. which I looked up and it says that I need to reset it in order to do so I need to find the NRST pin and connect that to the ST link V2 along with the rest of the connections that I have connected to it, which are the 3.3 V the ground, the SWDIO and the . do you have any insights on my best route to go or what I need to do I will gladly pay you for helping me. I can send it through Venmo Cash app chime PayPal or Zelle just let me know. I already have the controller out just waiting to get this done and if I can find Help that would be a huge weight lifted off my shoulder. but I’ll shoot you 20 bucks or whatever if you can help me?
2025-12-19 8:24 AM
> Stm32F405 I’m trying to change the serial number to a Chinese serial number
Do you know how to do that? Have others done it and reported success? If it's a region-locked thing, the manufacturer probably did something to avoid this.
Hold BOOT0 high during reset (and BOOT1 low), connect to the chip using GND/SWDIO/SWCLK in STM32CubeProgrammer. If it doesn't work, the chip is either locked out or you've made an error in wiring. Since I don't physically have the board, not much else I can help with here.