Hi Gus (or any ghi wizard )
Well i just received a new batch of pcb for production. So i wanted to test them. They have got an EMX module on them. And again i am a bit lost. The devices are debugging to Com1. So i changed it in the code to Usb1. Doesn’t work. So i cleared the entire device, updated tiny booter and the latest GHI sdk. Still on com1. We have added a jumper to the pcb to for LMODE low, so i added the jumper and restarted (like explained in the manual). Now i can’t reach the device on com1 anymore. I am almost happy now, but the device isn’t recognized as usb either. Windows doesn’t see a unknown device either. I measured the traces from the usb connector to the EMX. No trace errors or break ups…
I have tested 4 pcb’s out of the 9 of have received. All have got the same problem… Ow i have uploaded an image of the design (so you can see the emx being used in a commercial product : ) The CAN remote that is given me headaches (see my other post) is also in the image.
just tested the traces on the pcb again.
Usb pin1 goes to Pin26 on the emx and measures 3.25V
Usb pin2 goes to Pin41 on the emx
Usb pin3 goes to Pin42 on the emx
Usb pin4 goes to Gnd
Is the voltage on usb pin 1 enough? Since the usb specs talk about 5v (and it is now at the vcc of the Emx). But if i measure on my older boards it is also at the same level and those get detected just fine.