LPC MicrocontrollersのトピックRe: USB_DeviceCdcAcmSend, value of class handle (class_handle_t) on LPC55s69

USB_DeviceCdcAcmSend, value of class handle (class_handle_t) on LPC55s69

gertvb — Sat, 12 Sep 2020 08:31:13 GMT

Good Day Everyone!

Not a problem, just a minor question

I am using 2X VCom ports on the USB Full speed adapter USB0 on the LPC55s69

Ive created the 2 ports with MCUXpresso Configtools and use USB_DeviceCdcAcmSend to write data back to 2 TeraTerm instances from the main loop - and everything works fine!

I just want to find out if the value for class_handle_t as used in USB_DeviceCdcAcmSend is exposed in a header file somewhere?

Currently I am using :0x40101580 and 0x401015e8 as hardcoded magic numbers as parameters to USB_DeviceCdcAcmSend, and although it works fine, I would rather use the data structures as used in the USB system, but I am unable to to find any exposed in a header file somewhere

Thanks

Re: USB_DeviceCdcAcmSend, value of class handle (class_handle_t) on LPC55s69

ZhangJennie — Mon, 14 Sep 2020 09:24:11 GMT

I don't suggest you use hardcode as parameter because it causes your code not flexible.

You can refer MCUXpresso SDK cdc demo code to mange yours code.

regarding to your hardcode 0x40101580 , I suggest you check g_cdcAcmHandle, this structure should defined at this address.

Re: USB_DeviceCdcAcmSend, value of class handle (class_handle_t) on LPC55s69

gertvb — Mon, 14 Sep 2020 16:16:19 GMT

Thanks for the reply! Much appreciated

Got it working properly by referencing "g_UsbDeviceComposite" as declared in usb_device_composite.c

usb_device_composite_struct_t *ptr_UsbDeviceComposite;
ptr_UsbDeviceComposite = &g_UsbDeviceComposite;

USB_DeviceCdcAcmSend(ptr_UsbDeviceComposite->interface0CicVcomHandle, 2, s_VCom_Send_Buffer, i_Size_VCom_Send_Buffer);