cdc_acm problem

[Andrea Gonelli]

hello

using the usbd_ble_uart_pca10056 demo code connected to a microchip USB_CDC pic32 microcontroller I riceve this erroro on debug interface

<info> app: USBD BLE UART example started.
<info> app: USB power detected
<info> app: USB ready
<debug> nrf_ble_gatt: Requesting to update ATT MTU to 64 bytes on connection 0x0.
<info> app: BLE NUS connected
<debug> nrf_ble_gatt: ATT MTU updated to 64 bytes on connection 0x0 (response).
<info> app: Data len is set to 0x3D(61)
<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0x40
<debug> app: Received data from BLE NUS. Writing data on CDC ACM.
<debug> app: 30 31 32 33 34 35 36 37|01234567
<debug> app: 38 39 30 31 32 33 34 35|89012345
<debug> app: 36 37 38 39 |6789
<info> app: CDC ACM unavailable, data received: 01234567890123456789

NUS seems work fine but I'm not able to understand what is going wrong on usb side

thanks for any suggestion

Andrea Gonelli

[awneil]

Does it work when plugged into a PC?

Does the PIC32 indicate that it has successfully enumerated the DK?

[makesense]

If I understand correctly, you are connecting USB of the DK to the USB of the microchip ? Both are USBD (USB device) can not be connected together.  USB connection must be device with a host.  The nRF USB I believe is Device only.  Host is mode not supported.  So if your PC32 has host support then you must enable host mode on the PIC32 side.

[Andrea Gonelli]

Hello to everyone

thanks for answers

pic32 operate as host and seems to enumerate in the right way the nordic chip

[awneil]

So, again, does your nRF work when plugged into a PC?

Andrea Gonelli said:

pic32 operate as host and seems to enumerate in the right way

I think you need to confirm that a but more definitely!

Do you have any other CDC_ACM device(s) which do work when plugged into the PIC32.

[Andrea Gonelli]

Hi Awneil

nRF module works fine on my PC

microchip MC2200 USB CDC module works fine with PIC32

pic32 enumerate nrf module without errors but doesnt work