2020-02-19 03:47 AM
Hi guys.
I made this circuit/board at home:
but cant't be recognized in "STM32 ST-LINK Utility" (swdio & swclk).
i tested "under reset, with lower frequencies, and connect with pushed reset button down while connecting usb cable".
also the other layer (all of it, there is no circuit in bottom layer) of pcb is polygoned to ground (i used two layer fiberglass pcb). is it possible the mcu affected by this grounded polygon?
thanks.
2020-02-19 04:58 AM
You need to show your programming connections.
You need SWDIO,SWCLK,RESET and Ground all connected to the ST-Link programmer. You should also make sure RESET is pulled high.
Andy
2020-02-19 04:59 AM
Can some other debugger connect?
2020-02-19 06:45 AM
the wiring is is according to:
GND -> GND
VDD -> VCC
PA14 -> SWCLK
PA13 -> SWDIO
NRST -> TRST
i tried in boot mode (boot0->high & boot1->low) and normal mode(boot0->low & boot1->low) but no success!
2020-02-19 06:48 AM
i have no other st-link...
but using usart1 in boot mode (boot0->high & boot1->low):