lab-07-4619.c

MSP430F2013是TI的U盘开发工具对SPI进行读写的工程源程序包

//******************************************************************************
//   MSP430xG46x Demo - USCI_B0, SPI Interface to MSP430F2013
//
//   Description: This program demonstrate USCI_B0 in SPI mode interfaced to a
//   MSP430F2013. The 'FG4619 transmits the SPI data via RS232 to a PC.
//   ACLK = 32.768kHz, MCLK = SMCLK = default DCO ~1048k
//
//                Slave                      Master
//               MSP430F20x3                MSP430FG4619
//             -----------------          -----------------
//            |              XIN|-    /|\|              XIN|-
//            |                 |      | |                 |
//            |             XOUT|-     --|RST          XOUT|-
//            |                 | /|\    |                 |
//            |          RST/NMI|--+     |                 |
//            |                 |        |     P2.5/UCA0RXD|------------>
//            |                 |        |                 | 115200 - 8N1
//            |                 |        |     P2.4/UCA0TXD|<------------
//            |                 |        |                 |
//            |         SDI/P1.7|<-------|P3.1/UCB0SIMO    |
//            |         SDO/P1.6|------->|P3.2/UCB0SOMI    |
//            |        SCLK/P1.5|<-------|P3.3/UCBoCLK     |
//
//   FengLF
//   LSD SCIENCE& TECHNOLOGY CO.,LTD 
//   2007.06
//   Built with IAR Embedded Workbench Version: 3.42A
//******************************************************************************
#include  "msp430xG46x.h"

unsigned char ByteCount;

void Dealy()
{
  unsigned int i;
  unsigned int j;
  for(i = 0; i< 5000; i++);
  {
    for(j = 0; j< 20000; j++);
  }
}
void main(void)
{
  volatile unsigned int i;
  WDTCTL = WDTPW+WDTHOLD;                   
  FLL_CTL0 |= XCAP14PF;                     
  do
  {
  IFG1 &= ~OFIFG;                           // 清晶振失效标志位
  for (i = 0x47FF; i > 0; i--);              
  }
  while ((IFG1 & OFIFG));                   // 晶振失效标志位仍置1？

  P1IES|=0x01;
  P1IE|=0x01;

//--- Initialization of RS232 Commuinication (USCI_A) --------------------------
  P2SEL |= 0x030;                           // P2.4,5分别作为 USCI_A0的 RXD 和 TXD
  UCA0CTL1 |= UCSSEL_2;                     // USCA0 时钟源 SMCLK
  UCA0BR0 = 0x09;                           // 设置波特率 1048576/115200
  UCA0BR1 = 0x00;                           
  UCA0MCTL = 0x02;                          // 调制
  UCA0CTL1 &= ~UCSWRST;                     
  //IE2 |= UCA0RXIE;                        // Enable USCI_A0 RX interrupt
 
//--- Initialization of SPI Commuinication (USCI_B) ----------------------------
  P3SEL |= 0x0C;                            // P3.3,2 功能选择
  UCB0CTL0 |= UCMST+UCSYNC+UCMSB;           // SPI 主机 3线制 高位先发
  UCB0CTL1 |= UCSSEL_2;                     // USCB0 时钟源 
  UCB0BR0 = 0x20;
  UCB0BR1 = 0;
  UCB0CTL1 &= ~UCSWRST;                     

//--- Main Loop ----------------------------------------------------------------
  while(1)
  { 
    _BIS_SR(LPM3_bits + GIE);                // 进入低功耗 LPM3
  }
}

#pragma vector=PORT1_VECTOR
__interrupt void PORT1_ISR (void)
{ 
  P1IE &= ~0x01;
  ByteCount=0;
  UCA0TXBUF = 'S';                           // 经串口发送数据 “SPI” 
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = 'P';
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = 'I';
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = ':';
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = '"';
  while(!(IFG2&UCA0TXIFG));

  while(ByteCount<=21)                      // 通过SPI模式接收F2013发过来的21个数据 
  { UCB0TXBUF = 0x00;                       // D空写启动SPI
    while (!(IFG2 & UCB0RXIFG));            // USCI_B0 准备发送
    ByteCount=ByteCount+1;
    UCA0TXBUF = UCB0RXBUF;                  // 经串口发送数据到PC机 
    while(!(IFG2&UCA0TXIFG));               // 等待 TXbuffer为空 ？
  }
  UCA0TXBUF = '"';                          // 经串口发送数据发送 “" ”
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = 10;                           // 发送回车键 
  while(!(IFG2&UCA0TXIFG));
  UCA0TXBUF = 13;
  while(!(IFG2&UCA0TXIFG));
  P1IFG=0x00;                               // 清中断标志
  LPM3_EXIT;
  P1IE |= 0x01;
}