abdulsamad.zahir
Newbie level 2
Hi Everybody,
I'm working with an MK20DX256VLH7 (Cortex M-4) paired with an MKL02 on one board. This board is connected to another board which contains the microUSB port. The two boards connect to each other using headers to upload the code to MK20. However, when I try to upload the code using USB connection, board's not detected by the PC (nothing shows up on device manager - device is not even detected as "unknown device"). The workaround has been to detach the boards, cut a USB cable, solder the USB wires to the pins (V_USB, D_N, D_P, GND) and upload the code. This way, the device is recognized and the code is uploaded. Afterwards, I can de-solder the wires, and upload my code using microUSB port which was previously not detected by PC.
This is quite strange since we've used these chips before and we've never faced any issues before.
I'd greatly appreciate it if someone could help in finding what's causing this problem.
If any further details are needed, let me know please.
View attachment Design (1).PDF
I'm working with an MK20DX256VLH7 (Cortex M-4) paired with an MKL02 on one board. This board is connected to another board which contains the microUSB port. The two boards connect to each other using headers to upload the code to MK20. However, when I try to upload the code using USB connection, board's not detected by the PC (nothing shows up on device manager - device is not even detected as "unknown device"). The workaround has been to detach the boards, cut a USB cable, solder the USB wires to the pins (V_USB, D_N, D_P, GND) and upload the code. This way, the device is recognized and the code is uploaded. Afterwards, I can de-solder the wires, and upload my code using microUSB port which was previously not detected by PC.
This is quite strange since we've used these chips before and we've never faced any issues before.
I'd greatly appreciate it if someone could help in finding what's causing this problem.
If any further details are needed, let me know please.
View attachment Design (1).PDF