Hello, I have designed a custom circuit using the STM32F747XIH6, but I am unable to connect and flash the code using ST-Link. I have checked all the connections, and the NRST pin has a pull-up resistor and measures 3.3V. The 25MHz clock signal appears correct on the oscilloscope. The power circuit is designed in SMPS mode as per the datasheet, and the VFB_SMPS pin measures 1.2V. The VCORE1, VCORE2, and VCORE3 pins each have a 2.2µF capacitor and measure 1.0V. Despite these confirmations, I am still unable to connect via ST-Link and flash the code. Could there be any overlooked issue causing this?
Which ST-link do you have?
Can you share the schematic diagram?
Thanks for your response. I tried with ST-Link/V2 and ST-Link/V2 Mini but couldn't flash the program. Both ST-Links are working and have been tested. I'm sending the MCU circuit schematic. If you need anything else, I'd be happy to share it
Ok, in my case, I don't have the ST-Link V2 nor the ST-Link Mini. Only have the ST-link V3MINIE.
For the the last one I connect the SWCLK, SWDIO, RST ando VCC pins to the uC.
Is it the same for you?
What program do you use to flash via ST link?
What error message appears during flashing - copy it to the forum as text.
I am not getting any errors. That's the problem. The ST-Link is not responding at all. It behaves as if it has never been connected. I tried programming with STM32Cube.
So it's an issue with St-Link itself and not with STM32F747 board...
What is your OS? Did you installed a driver for St-link?
The ST-Link is working because I was able to program an STM32F103C8 when I tested it. All the necessary drivers are installed.
It seems to me that these contradict each other.
Check again if the ST-link will work with the STM32F103 board?
Maybe it is broken?
ST-Link works perfectly with STM32F103