USB2ANY: USB2ANY Interface Adapter

Hi Swaroop,

I looked this example and did some test in my side, the default example only have read funciton, if you send some data from USB2ANY, you will encounter some issue(maybe timeout).

I added some code(enable RX interrupt and read RXBUF data), now you can try this code, this should be able to read and write I2C data:

#include <msp430.h>

volatile unsigned char TXData;
volatile unsigned char RXData;

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;

    // Configure GPIO
    P7SEL0 |= BIT0 | BIT1;
    P7SEL1 &= ~(BIT0 | BIT1);

    // Disable the GPIO power-on default high-impedance mode to activate
    // previously configured port settings
    PM5CTL0 &= ~LOCKLPM5;

    // Configure USCI_B2 for I2C mode
    UCB2CTLW0 = UCSWRST;                    // Software reset enabled
    UCB2CTLW0 |= UCMODE_3 | UCSYNC;         // I2C mode, sync mode
    UCB2I2COA0 = 0x48 | UCOAEN;             // own address is 0x48 + enable
    UCB2CTLW0 &= ~UCSWRST;                  // clear reset register
    UCB2IE |= UCRXIE0 | UCTXIE0 | UCSTPIE;            // transmit,stop interrupt enable

    __bis_SR_register(LPM0_bits | GIE);     // Enter LPM0 w/ interrupts
    __no_operation();
}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = EUSCI_B2_VECTOR
__interrupt void USCI_B2_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(EUSCI_B2_VECTOR))) USCI_B2_ISR (void)
#else
#error Compiler not supported!
#endif
{
    switch(__even_in_range(UCB2IV, USCI_I2C_UCBIT9IFG))
    {
        case USCI_NONE:          break;     // Vector 0: No interrupts
        case USCI_I2C_UCALIFG:   break;     // Vector 2: ALIFG
        case USCI_I2C_UCNACKIFG: break;     // Vector 4: NACKIFG
        case USCI_I2C_UCSTTIFG:  break;     // Vector 6: STTIFG
        case USCI_I2C_UCSTPIFG:             // Vector 8: STPIFG
            TXData = 0;
            UCB2IFG &= ~UCSTPIFG;           // Clear stop condition int flag
            break;
        case USCI_I2C_UCRXIFG3:  break;     // Vector 10: RXIFG3
        case USCI_I2C_UCTXIFG3:  break;     // Vector 12: TXIFG3
        case USCI_I2C_UCRXIFG2:  break;     // Vector 14: RXIFG2
        case USCI_I2C_UCTXIFG2:  break;     // Vector 16: TXIFG2
        case USCI_I2C_UCRXIFG1:  break;     // Vector 18: RXIFG1
        case USCI_I2C_UCTXIFG1:  break;     // Vector 20: TXIFG1
        case USCI_I2C_UCRXIFG0:
            RXData = UCB2RXBUF;
            break;     // Vector 22: RXIFG0
        case USCI_I2C_UCTXIFG0:             // Vector 24: TXIFG0
            UCB2TXBUF = TXData++;
            break;
        case USCI_I2C_UCBCNTIFG: break;     // Vector 26: BCNTIFG
        case USCI_I2C_UCCLTOIFG: break;     // Vector 28: clock low timeout
        case USCI_I2C_UCBIT9IFG: break;     // Vector 30: 9th bit
        default: break;
    }
}

Changed Items for this code:

I also did some test in my side, looks communication successful:

Hardware connection with same with you:

Thanks!

Best Regards

Johnson