MSP430G2553 SPI UART

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MSP430G2553 SPI UART [复制链接]

void SPI_Init(void)
{
    UCB0CTL0 = UCMSB + UCMST + UCMODE_1 + UCSYNC; // MSB First; Set TBA as master; 4Pin Mode, slave active on UCB1STE=>NCS low; SPI Mode
    UCB0CTL1 = UCSWRST + UCSSEL_2; // Reset and hold reset logic state; SMCLK as USC clock source
    UCB0BR0 = 0x50; // Set Baud Rate divider (MSByte) for SPI clock
    UCB0BR1 = 0; // Set Baud Rate divider (LSByte) for SPI clock

    P1SEL |= BIT5 + BIT6 + BIT7; // Configure P1.5, P1.6, & P1.7 as SPICLK, SOMI, and SIMO to talk to BAST
    P1SEL2|= BIT5 + BIT6 + BIT7;
    P1DIR |= BIT5 + BIT6 + BIT7; // SPICLK, SOMI, and SIMO as outputs
    P1DIR &= ~BIT6; // SOMI as input
    P1DIR &= ~BIT3; // INT as input
    UCB0CTL1 &= ~UCSWRST; // Leave logic reset state. Starts SPI state machine
}

void UART_Init(void)
{
    P1SEL = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
    P1SEL2 = BIT1 + BIT2 ; 
    UCA0CTL1 |= UCSSEL_2; // SMCLK
    UCA0BR0 = 0x41; // 8MHz 9600 Baud Rate
    UCA0BR1 = 0x03; // 8MHz 9600 Baud Rate
    UCA0MCTL = UCBRS0; // Modulation UCBRSx = 1
    UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
    IE2 |= UCA0RXIE; // Enable USCI_A0 RX interrupt 
}
两个配置，实际应用的代码，做参考。