main.c

基于MSP430F447的串口控制程序包

//******************************************************************************
//  MSP-FET430P440 Demo - USART0, 9600 UART Echo ISR, DCO SMCLK
//
//  Description: Echo a received character, RX ISR used. Normal mode is LPM0.
//  USART0 RX interrupt triggers TX Echo.
//  Baud rate divider with 1048576hz = 1048576Hz/9600 = ~109.23 (06Dh|03h)
//  ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
//  //* An external watch crystal between XIN & XOUT is required for ACLK *//	
//
//                MSP430F449
//             -----------------
//         /|\|              XIN|-
//          | |                 | 32kHz
//          --|RST          XOUT|-
//            |                 |
//            |             P2.4|----------->
//            |                 | 9600 - 8N1
//            |             P2.5|<-----------
//
//
//  M. Buccini
//  Texas Instruments Inc.
//  Feb 2005
//  Built with IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include <msp430x44x.h>
void senddata(char *value,char uart_length);
void uart_config(void);                     //UART初始化设置函数
#define   Num_of_Results   8                //定义用于存放全局变量的数组
char Rev_results[Num_of_Results]={1,2,3,4,5,6,7,8};
char index = 0;

void uart_config(void){
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  FLL_CTL0 |= XCAP18PF;                     // Configure load caps
  P2SEL |= 0x30;                            // P2.4,5 引脚为串口通信脚
  P2DIR |= 0xd0;                            // P2.4,P2.6,P2.7设置为输出模式
  //P2OUT &= ~0x80;                         // 芯片供电撤消，供电结束
  P2OUT |= 0x80;                            // 芯片供电
  P2OUT |= 0x40;                            // 允许发送
  
  ME1 |= UTXE0 + URXE0;                     // Enable USART0 TXD/RXD
  UCTL0 |= CHAR;                            // 8位传送模式
  UTCTL0 |= SSEL1;                          // UCLK = SMCLK
  UBR00 = 0x6D;                             // 调制波特率
  UBR10 = 0x00;                              
  UMCTL0 = 0x03;                             
  UCTL0 &= ~SWRST;                          // Initialize USART state machine
//  IE1 |= UTXIE0;                            // 允许中断
}
void main(void)
{
 // Rev_results[Num_of_Results]={1,2,3,4,5,6,7,8};

  uart_config();
  senddata(Rev_results,8);

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

void senddata(char *value,char uart_length){
  char i;
  int j;
  TXBUF0 = *value++;              // RXBUF0 to TXBUF0  
  for(j=300;j>0;j--){};
  for(i=0;i<uart_length-1;i++){
    while (!(IFG2 & UTXIFG1));                // USART1 TX buffer ready?
    TXBUF0 = *value++;              // RXBUF0 to TXBUF0     
    for(j=300;j>0;j--){};
  }
}