MSP430F5529: USB serial communication works on Windows but not on Ubuntu

Tool/software:

Hello,

I have developed a project, starting from the SimpleUsbBackChannel project (I've attached the main.c). Basically, the code send some numbers over USB. I can see the output using Putty on Windows. However, I cannot see the serial output if I'm using Ubuntu. I am using screen to see the serial communication in Ubuntu.

Could be there any issue when changing from Windows to Ubuntu with this project?

Thanks,

Alberto

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//******************************************************************************
//   MSP430F5529LP:  simpleUsbBackchannel example
//
//   Description: 	Demonstrates simple sending over USB, as well as the F5529's
//                  backchannel UART.
//
//   Texas Instruments Inc.
//   August 2013
//******************************************************************************

// Basic MSP430 and driverLib #includes
#include "msp430.h"
#include "string.h"
#include "stdio.h"
#include "driverlib/MSP430F5xx_6xx/wdt_a.h"
#include "driverlib/MSP430F5xx_6xx/ucs.h"
#include "driverlib/MSP430F5xx_6xx/pmm.h"
#include "driverlib/MSP430F5xx_6xx/sfr.h"

// USB API #includes
#include "USB_config/descriptors.h"
#include "USB_API/USB_Common/device.h"
#include "USB_API/USB_Common/types.h"
#include "USB_API/USB_Common/usb.h"

#include "USB_app/usbConstructs.h"

// Application #includes
#include "BCUart.h"           // Include the backchannel UART "library"
#include "hal.h"              // Modify hal.h to select your hardware


/* You have a choice between implementing this as a CDC USB device, or a HID-
 * Datapipe device.  With CDC, the USB device presents a COM port on the host;
 * you interact with it with a terminal application, like Hyperterminal or
 * Docklight.  With HID-Datapipe, you interact with it using the Java HID Demo
 * App available within the MSP430 USB Developers Package.
 *
 * By default, this app uses CDC.  The HID calls are included, but commented
 * out.
 *
 * See the F5529 LaunchPad User's Guide for simple instructions to convert
 * this demo to HID-Datapipe.  For deeper information on CDC and HID-Datapipe,
 * see the USB API Programmer's Guide in the USB Developers Package.
 */


// Global variables
WORD rxByteCount;                        // Momentarily stores the number of bytes received
BYTE buf_bcuartToUsb[BC_RXBUF_SIZE];     // Same size as the UART's rcv buffer
BYTE buf_usbToBcuart[128];               // This can be any size


void main(void)
{
	WDTCTL = WDTPW + WDTHOLD;		// Halt the dog

    // MSP430 USB requires a Vcore setting of at least 2.  2 is high enough
	// for 8MHz MCLK, below.
    PMM_setVCore(PMM_CORE_LEVEL_2);

    //initPorts();           // Config all the GPIOS for low-power (output low)
    initClocks(8000000);   // Config clocks. MCLK=SMCLK=FLL=8MHz; ACLK=REFO=32kHz
    bcUartInit();          // Init the back-channel UART
    USB_setup(TRUE,TRUE);  // Init USB; if a USB host (PC) is present, connect

    P1DIR |= BIT3;              // P1.3 output
    P1OUT &= ~BIT3;             // P1.3 LOW

    P4DIR |= (BIT7 | BIT1);     // P4.1 & P4.7 output
    P4OUT &= ~(BIT7 | BIT1);    // p4.1 & P4.7 LOW

    // P1IES |= (BIT2);            // Rising Edge 0 -> 1
    P1IFG &= (~BIT2);           // Clear interrupt flag for P1.2

    int array[100];
    unsigned int i = 0;

    __enable_interrupt();  // Enable interrupts globally

    while(1)
    {
        P1OUT |= BIT3;      // Indicate start (trigger)

        for (i = 0; i < 100 ; i++)
        {
            array[i] = i + 1;
        }

        char buffer[4];
        for (i = 0; i < 100; i++)
        {
            sprintf(buffer, "%d ", array[i]); // Convert number to chain of characters
            cdcSendDataInBackground((BYTE*)buffer, strlen(buffer), CDC0_INTFNUM, 0); // Send counter value via USB
        }

        memset(array, 0, sizeof(array)); // Sets all positions of the array to 0

        __delay_cycles(1000000);

    }
    return 0;
}