Stuck on Enable USB Interrupts

[gianluca_panett]

Hello,

I have the IMXRT1050 eval board with MIMXRT1052DVL6B and I wanted to set up a new project using the USB connector to create a virtual COM port, just like in the SDK example project.

So I created a new (empty) project with USB middleware included, set my clock to 588 MHz by disabling ARM_PLL bypass (PLL1_BYPASS -> ARM_PLL) and then in the Peripherals Tool in the Middleware section I added one USB entry with

Mode: Device,

Peripheral: USB1,

Preset: CDC VCOM.

After that, I had to enable the clock for USB1 and then I could generate the code.

When I start debugging my code (nothing else added here, except the generated code), the initialization fails during USB_DeviceEhiSetDefaultState() in the line

    /* Enable USB Interrupt, USB Error Interrupt, Port Change detect Interrupt, USB-Reset Interrupt*/
    ehciState->registerBase->USBINTR =
        (USBHS_USBINTR_UE_MASK | USBHS_USBINTR_UEE_MASK | USBHS_USBINTR_PCE_MASK | USBHS_USBINTR_URE_MASK

When reaching this line by debugging step-by-step, the debugger hangs up in this line, can not proceed after clicking on pause or stop, I get a window with the error message "Interrupt failed."

Normally I assume that automatically generated code should run out of the box, but here it seem like it does.

So what could be the reason that it doesn't work?

Remark: I didn't select the eval board in the wizard, I just selected the microcontroller I use, because later this project should also run on a custom board. So for example I don't use the boards additional RAM and Flash.

[jingpan]

Hi Gianluca,

Please check the interrupt vector point to right address. The USB component only include basic file. You must add class relate file and application by yourself. I think generated code can't run out of the box. There is still many work to do. If the problem is still there, you can send me your project.

Regards,

Jing

[gianluca_panett]

Hello Jing,

thanks for your help.

I added the clock for USB and now my program starts running. I also see an additional COM port in my windows device manager.

Where do I check the interrupt vectors?

This is a general problem which I have now also with other peripherals: I can generate example projects which run quite fine out of the box but I can not close the gap to the code which is generated when I create an empty project adding my peripherals. I see no configurations made in the Config Tools in the example projects where I can derive the settings to my own project from, there's just a bunch of code, which doesn't match to the generated code.

Where can I find documentation about peripherals, which says what to do DIRECTLY AFTER including them in the Config Tools?

Many thanks

Gianluca

[jingpan]

Hi,

The interrupt vector table is point by SCB->VTOR register. When check if the pointer is correct, you should read this register and then read the memory content there.

You can read MCUXpresso_IDE_ConfigTools_User_Manual.pdf. It is in MCUXpresso install directory. When you finish configuring a peripheral, IDE will put the initialize code in peripherals.c, update pin_mux.c and clock_config.c. You should call the initialize code by yourself.

Regards,

Jing