USCI_B0 in SPI mode

[Kazzz]

I am trying to use USCI_B0in SPI mode but when I probe the MOSI line with a scope I do not see anything. I can see that what I am sending is in the TX buffer in the watch window. My code is below, any help would be very welcomed.

Thanks

Kas

int initSPI(void)

{

P1SEL = BIT5 + BIT6 + BIT7; // Configure SPI on USCI0 port B

P1SEL2 = BIT5 + BIT6 + BIT7; // Configure SPI on USCI0 port B

UCB0CTL1 |= UCSWRST; // Disable USCI

UCB0CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC;   // 3-pin, 8-bit SPI master

UCB0CTL1 |= UCSSEL_2  + UCSWRST;           // SMCLK

UCB0BR0 |= 0x02;                           // /2

UCB0BR1 = 0;                               //

UCA0MCTL = 0;                             // No modulation

UCB0CTL1 &= ~UCSWRST; //LOOK here for issues                     // Initialise USCI state machine

IE2 |= UCB0RXIE;                           // Enable USCI0 RX interrupt

P1DIR |= 0x08; // Set as CS for SPI

P1OUT |= 0x08; // Set high to deselect IC

return 0;

}

void spiWrite(unsigned char wrAddr, unsigned char wrData)

{

P1OUT &= ~0x08; // Set CS;

// Set the TX buffer for each byte, then go to LPM0 while waiting for the TX to complete

UCB0TXBUF = WRITEINST;

_BIS_SR(LPM0_bits + GIE); // Enter LPM0 w/interrupt

UCB0TXBUF = wrAddr;

_BIS_SR(LPM0_bits + GIE); // Enter LPM0 w/interrupt

UCB0TXBUF = wrData;

_BIS_SR(LPM0_bits + GIE); // Enter LPM0 w/interrupt

P1OUT |= 0x08; // release CS

return;

}

[Тимур Яблоновский]

Hi. its wrong code. just use no interrupts:

1) remove

IE2 |= UCB0RXIE;

2) use code like (pooling method):

void spiWrite(unsigned char wrAddr, unsigned char wrData)
{
P1OUT &= ~0x08; // Set CS;

     while (!(IFG2 & UCB0TXIFG) || (UCB0STAT & UCBUSY)); // USCI_B0 TX buffer and SPI B0 ready?

UCB0TXBUF = WRITEINST;
     while (!(IFG2 & UCB0TXIFG)); // USCI_B0 TX buffer ready? 

UCB0TXBUF = wrAddr;

     while (!(IFG2 & UCB0TXIFG));  // USCI_B0 TX buffer ready?
  UCB0TXBUF = wrData;
    // while (UCB0STAT & UCBUSY); // if need