slaa319.c

DAC8814EVM to MSP430449 Processors ti的程序,不错啊

/****************************************************************/
/* FILENAME: SLAA319.c                        		        */
/* DESCRIPTION: This program uses the MSP430F449 to write 256 	*/
/*    samples to the DAC8814 EVM board.                         */
/*    The samples are generated by sine/cosine functions        */
/*    AUTHOR: T. Hendrick, Data Acquisition Products,           */
/*            Dallas Texas                                      */
/*    CREATED 2005(C) BY TEXAS INSTRUMENTS INCORPORATED.  	*/
/*    VERSION: 01 						*/
/* Compiled on IAR Embedded Workbench V 4.0                     */
/****************************************************************/
#include <msp430x44x.h>
#include <math.h>
#include "SBLCDA2.h"


/**************** Function prototypes ***********************************/
/*                                                                      */
void init_sys(void);                /* MSP430 Initialisation routine    */
void setupClock(int);
void delay(int);                   /* Software delay                   */
void dac_convert(int);             /* Do the adc conversion            */
void display(void);                 /* Indicate Program complete        */
void InitializeLCD( void );
void clearDisplay( void );
void sortMajor( unsigned int );
void displaySpecial( long int );
void displayMinor( int, int );
void displayHPA449(void);
void displayTest(void);	
void InitTables(int);

/************************************************************************/
/*                                                                      */
/* HPA449 variable declarations                                         */
/*                                                                      */
/************************************************************************/
#define Resonator (0)

//Define the following statemests as "true" (change zero to 1) based on serial port
//  Note - Only one can be set true
#define SERIAL_A (1)
#define SERIAL_B (0)

/************************************************************************/
/*                                                                      */
/* main() variable declarations                                         */
/*                                                                      */
/************************************************************************/
#define TABLE_SIZE       256

int sinetable[TABLE_SIZE];
short byte0, byte1, byte2;
int i, y;

/******************************************************************************\
* Function: InitTables()
* Description: Initializes Sine and Cosine Values
\******************************************************************************/
void main(void)
{

  setupClock(Resonator);
  init_sys();                   	// Initialise the MSP430
  InitializeLCD();
  clearDisplay();
  displaySpecial(SoftBaugh|AL|AR|AU|AD);
  InitTables(2);
         displayTest();
         displaySpecial(SoftBaugh|AR);

      do {

           for(i=0; i<TABLE_SIZE; i++)
           {
            dac_convert(sinetable[i]);            // Do conversions from each channel
           }
         }

       while (1);              //
}			      	

void InitTables(int period)
{
	int y;
	for (y = 0; y < TABLE_SIZE; y++)
        {
          sinetable[y] = (unsigned int)((sin(2 * __PI * period * y / TABLE_SIZE) + 1.0) * 32767);
	}
}

/************************************************************/
/* Prototype - init_sys                                     */
/*                                                          */
/*  Description                                             */
/*  This prototype initialises the MSP430F149               */
/************************************************************/
void init_sys(void)
{
void setupports(void);  /* Local function prototype         */
void setupSPI(void);    /* Local function prototype         */

setupports();
setupSPI();
  _EINT();                              // Enable interrupts
}

/************************************************************/
/* Prototype - setupClock                                     */
/*                                                          */
/*  Description                                             */
/*  This prototype sets-up the XT2 oscillator and tests     */
/*  that it has settled before moving on                    */
/************************************************************/
void setupClock (int RES)
{
    switch (RES)
    {
        case  0:
          { WDTCTL = WDTPW + WDTHOLD;
            /* D=2, N=121, no mod */
            SCFQCTL=121;
            // SCFI0 = 0100 0100
            SCFI0=0x44;
            // DCOPLUS=1, XTS_FLL=0
            // XCAPXPF=00
            FLL_CTL0=0x80;
            // SMCLK=0, XT2OFF=1, SELMX=00, SELS=0, FLL_DIVX=10
            // FLL_CTL1= 0010 0010
            FLL_CTL1=0x22;
          }
          break;
        case  1:
          { WDTCTL = WDTPW + WDTHOLD;           // Stop watchdog timer
            FLL_CTL0&=XT2OFF;                    // Switch on the XT2 osc.
            FLL_CTL1|=SELM_XT2+SELS;                // Select XT2 osc. for
            // Test the osc. flag bit
            do {
                IFG1 &= ~OFIFG;            // Clear the OFIFG bit
                } while (OFIFG&IFG1);      //
          }

          break;
    }
}

/************************************************************/
/* Prototype - setupports                                   */
/*  Description                                             */
/*  This prototype sets-up the GPIO ports as appropriate    */
/************************************************************/
void setupports (void)
{
// SPI port for ADC
#if SERIAL_A
  #define MSB            0x80  //p3.7
  #define DAC_CS         0x20  //p3.5
  #define LDAC           0x08  //p2.3
  P3DIR = MSB + DAC_CS;  // Set the MSB + DAC_CS as an output
  P3OUT = MSB + DAC_CS;
  P2DIR = LDAC;          // Set the LDAC as an output
  P2OUT = LDAC;
  P3SEL = BIT3 + BIT1 + BIT0;  // Select SPI function of port 3
#endif

#if SERIAL_B
  #define MSB            0x40  //p2.6
  #define DAC_CS         0x04  //p1.2
  #define LDAC           0x08  //p2.3
  P1DIR = DAC_CS;              // Set the DAC_CS as an output
  P1OUT = DAC_CS;
  P2DIR = MSB + LDAC;          // Set the MSB and LDAC as an output
  P2OUT = MSB + LDAC;
  P4SEL = BIT5 + BIT3 + BIT2;  // Select SPI function of port 4
#endif

}

/************************************************************/
/* Prototype - setupSPI                                     */
/*                                                          */
/*  Description                                             */
/*  This prototype sets-up the P3 for communication via SPI */
/************************************************************/
void setupSPI (void)
{
#if SERIAL_A
// UART0 Setup
ME1 |= USPIE0;                      // Module Enable - SPI
U0CTL &= ~SWRST;                    // Make sure the RESET bit is off
U0CTL |= CHAR + SYNC + MM;          // USART0 module operation
U0TCTL |= CKPH + SSEL0 + SSEL1 + STC; // USART0 Tranmit control register
U0BR0  = 0x02;                      // Divide SMCLK by 4 => transfer clock
U0BR1  = 0x00;                      //
U0MCTL = 0x00;                      // Modulation control - not used.
#endif

#if SERIAL_B
// UART1 Setup
ME2 |= USPIE1;                      // Module Enable - SPI
U1CTL &= ~SWRST;                    // Make sure the RESET bit is off
U1CTL |= CHAR + SYNC + MM;          // USART1 module operation
U1TCTL |= CKPH + SSEL0 + SSEL1 + STC; // USART1 Tranmit control register
U1BR0  = 0x02;                      // Divide SMCLK by 4 => transfer clock
U1BR1  = 0x00;                      //
U1MCTL = 0x00;                      // Modulation control - not used.
#endif
}

/************************************************************/
/* Prototype - delay                                        */
/*  Description                                             */
/*  This prototype gives a delay of around 1 second         */
/************************************************************/

void delay(int time)
      {
      unsigned int i;
      for (i = 0; i < time; i++);
      }

/************************************************************/
/* Prototype - convert                                      */
/*  Description                                             */
/*  This prototype does the adc conversion                  */
/************************************************************/
void dac_convert (value)
{
int i;
byte0 = (value)>>8;
byte1 = value >>0;

for (i=0; i<4; i++)
 {

 #if SERIAL_A
 P3OUT &= ~(DAC_CS);
   while ((IFG1 & UTXIFG0) == 0);
      U0TXBUF = i;             // Send clocks to the DAC, this shifts first byte
	                           // Wait until all 8 bits have been received.
   while ((IFG1 & UTXIFG0) == 0);
      U0TXBUF = byte0;             // Send clocks to the DAC, this shifts first byte
	                           // Wait until all 8 bits have been received.
   while ((IFG1 & UTXIFG0) == 0);
      U0TXBUF = byte1;             // Send clocks to the DAC, this shifts 2nd byte
	                           // Wait until all 8 bits have been received.
 delay(5);
 P3OUT |= (DAC_CS);

 #endif

 #if SERIAL_B
 P1OUT &= ~(DAC_CS);
      while ((IFG1 & UTXIFG0) == 0);
      U1TXBUF = i;             // Send clocks to the DAC, this shifts first byte
	                           // Wait until all 8 bits have been received.
   while ((IFG1 & UTXIFG0) == 0);
      U1TXBUF = byte0;             // Send clocks to the DAC, this shifts first byte
	                           // Wait until all 8 bits have been received.
   while ((IFG1 & UTXIFG0) == 0);
      U1TXBUF = byte1;             // Send clocks to the DAC, this shifts 2nd byte
	                           // Wait until all 8 bits have been received.
 delay(5);
 P1OUT |= (DAC_CS);
 #endif

 }

P2OUT &= ~(LDAC);
P2OUT |= (LDAC);
}

void displayTest(void)
{
    displayMinor(5,UL_EIGHT);
    displayMinor(4,UL_EIGHT);
    displayMinor(3,UR_ONE);
    displayMinor(2,UR_FOUR);
}