edsuperfix
New member
Hi,
I am new here and I have a technical question.
I wrote some basic application in Arduino with Teensy support on my MKL26z128vfm4 chip and then flash hex with jlink. It looks like it works well. Then I wrote basic app with usb serial println but it doesn't work - USB is not recognized Even with osciloscope D+ and D- do nothing.
I need bootloader if I use USB feature or it is not necessarily? I made simple circuit like Teensy LC but without bootloader and I use jlink to flash hex.
P.S.
Maybe my chip is broken? But, I prefer to ask a question earlier than solder a new chip
I am new here and I have a technical question.
I wrote some basic application in Arduino with Teensy support on my MKL26z128vfm4 chip and then flash hex with jlink. It looks like it works well. Then I wrote basic app with usb serial println but it doesn't work - USB is not recognized Even with osciloscope D+ and D- do nothing.
I need bootloader if I use USB feature or it is not necessarily? I made simple circuit like Teensy LC but without bootloader and I use jlink to flash hex.
P.S.
Maybe my chip is broken? But, I prefer to ask a question earlier than solder a new chip