i.MX RT Crossover MCUsのトピックRe: USB does not work

USB does not work

glebkit — Thu, 31 Jan 2019 05:11:52 GMT

Good day.

We have faced with problem that USB1 on RT1051 does nit work.

All power supplies are well (USB CAP, USB VDD and other digital supplies).

USB even does not work in full speed (thus the trouble is not in DP/DM layout).

The MCU is stalling after command execution

static void USB_DeviceEhciSetDefaultState(usb_device_ehci_state_struct_t *ehciState){

...

hciState->registerBase->DEVICEADDR = 0U;

}

Also USB bootloader does not work.

What bug can cause all these problems?

Re: USB does not work

Yuri — Fri, 01 Feb 2019 04:42:33 GMT

Hello,

Please try to verify 24 MHz (XTALI/XTALO) oscillator frequency, which

inaccuracy \ stability is USB sensitive.

Have a great day,
Yuri

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Re: USB does not work

glebkit — Fri, 01 Feb 2019 04:50:40 GMT

Good day.

We have verified it already.

We even soldered quartz 24 MHz from EVK.

No changes