Didan Ribeiro

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5 years, 11 months ago.

Can I program an external board using SWD connector from NUCLEO F103RB board from STM?

Hello guys. Im developing a hardware project and I dont have sure and idea if I can use any of SWD connector pins from Nucleo F103Rb board to boot, to program using Mbed plattform an external board that Im developing. Im using a STM32F401RBT6 ucro on my project and I dont have sure too which pin I need to use to program/boot. I downloaded sch files from Nucleo F103RB board and opened on Altium Design to check it. Looking the board the unique connectors I should use to program, to boot stm32F401RBT6 for my project is that SWD connector. I dont have sure if I need whole hardware interface to make mbed works or if i can use development board kit as Nucleo F103RB that I have here to program an external board using that SWD connector and how to do it. /media/uploads/Didan/screenshot_1.png

1 Answer

Zoltan Hudak
5 years, 11 months ago.

Hello Didan,

  • Remove the two jumpers from the CN2 connector on the NUCLEO-F103RB
  • Connect the CN4 connector of NUCLEO-F103RB board to the STM32F401RBT6 board as follows:
CN4 Connector on the NUCLEO-F103RBSTM32F401RBT6
SWCLK (pin 2)PA14
GND (pin 3)GND
SWDIO (pin 4)PA13
NRST (pin 5)NRST
  • Provide power for the STM32F401RBT6 board (The VDD_TARGET pin (pin 1) on the NUCLEO-F103RB board CN4 connector does not work as source of power).
  • Connect the NUCLEO-F103RB board to your PC over a USB cable.
  • Save the binary compiled for the STM32F401RBT6 to the NUCLEO-F103RB virtual disk.

For more details have a look at the User Manual, chapter 6.2.4 Using ST-LINK/V2-1 to program and debug an external STM32 application.

The following links could be of help as well: