mw_c28xx_csl.c

由MATLAB生成的SCI的源代码

#include "DSP281x_Device.h"
#include "rtwtypes.h"
#include "c2000scitest_2812tgt.h"
#include "c2000scitest_2812tgt_private.h"

volatile int pendingInterrupt = 0;

/* Function: schedulerTimer_ISR() -------------------------------------
 *
 * Abstract:
 *      This function services interrupts posted by scheduler timer
 */

interrupt void schedulerTimer_ISR(void)
{
  pendingInterrupt = 1;
  PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Enable CPU INT1 - hooked to CPU Timer 0
}

/*-----------------------------------------------------------------------------
 * void config_schedulerTimer(void)
 *
 * Abstract:
 *      This function configures scheduler timer
 */

void config_schedulerTimer(void)
{
  InitCpuTimers();

  /* Reassign the PIE vector for TINT0 to point to a specific ISR */
  EALLOW;
  PieVectTable.TINT0 = &schedulerTimer_ISR;
  EDIS;

  /* Configure CPU-Timer 0 to interrupt every 0.1 sec. */
  /* Parameters:  Timer Pointer, CPU Freq in MHz, Period in usec. */
  ConfigCpuTimer(&CpuTimer0, 150, 0.1 * 1000000);
  StartCpuTimer0();

  /* Enable TINT0 in the PIE: Group 1 interrupt 7 */
  PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
}

void disableWatchdog(void)
{
  int *WatchdogWDCR = (void *) 0x7029;
  asm(" EALLOW ");
  *WatchdogWDCR = 0x0068;
  asm(" EDIS ");
}

void init_SCI(uint32_T BaudRate,uint16_T CharacterLengthBits,uint16_T
 ClockSpeed,uint16_T EnableLoopBack,uint16_T EnableParity,uint16_T
 NumberOfStopBits,uint16_T ParityMode,uint16_T SuspensionMode,uint16_T
 UARTInterface)
{                                       /* initialize SCI & FIFO registers */
  EALLOW;
  SciaRegs.SCICCR.bit.STOPBITS = NumberOfStopBits-1; // Bit7, Number of Stop Bits
  SciaRegs.SCICCR.bit.PARITY = ParityMode-1; // Bit6, Even or Odd Parity
  SciaRegs.SCICCR.bit.PARITYENA = EnableParity; // Bit5, Parity enable 
  SciaRegs.SCICCR.bit.LOOPBKENA = EnableLoopBack; // Bit4, Loop Back enable
  SciaRegs.SCICCR.bit.ADDRIDLE_MODE = 0; // Bit3, ADDR/IDLE Mode control
  SciaRegs.SCICCR.bit.SCICHAR = CharacterLengthBits-1; // Bit0~2, Character length control
  SciaRegs.SCICTL1.bit.SWRESET = 1;     // Bit5, Software reset
  SciaRegs.SCICTL1.bit.TXENA = 1;       // SCI transmitter enable
  SciaRegs.SCICTL1.bit.RXENA = 1;       // SCI receiver enable
  SciaRegs.SCIHBAUD = ((ClockSpeed*1000000/4)/(BaudRate*8) - 1) >> 8;// Baud rate (high) register, BRR = LSPCLK/(SCI Asynchronous Baud)*8 - 1
  SciaRegs.SCILBAUD = ((ClockSpeed*1000000/4)/(BaudRate*8) - 1); // Baud rate (low) register, LSPCLK =150/2/2=37.5Mhz
  //Free run, continue SCI operation regardless of suspend
  SciaRegs.SCIPRI.bit.FREE = 1;         // Free emulation mode control, bit 3 =1
  SciaRegs.SCIPRI.bit.SOFT =1;          // Interrupt priority select, bit 4 =x
  SciaRegs.SCIFFCT.bit.ABDCLR = 0;
  SciaRegs.SCIFFCT.bit.CDC = 0;
  EDIS;
}

/* Function: enable_interrupts -------------------------------
 *
 * Abstract:
 *      Enable required c2800 DSP interrupts
 */

void enable_interrupts()
{
  PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Enable CPU INT1 - hooked to CPU Timer 0
  IER |= M_INT1;                        // Enable Global INT1 (CPU Interrupt 1)
  EINT;                                 // Enable Global interrupt INTM
}

/* Function: disable_interrupts -------------------------------
 *
 * Abstract:
 *      Disable required c2800 DSP interrupts
 */

void disable_interrupts()
{
  IER &= M_INT1;                        // Disable Global INT1 (CPU Interrupt 1)
  DINT;                                 // Disable Global interrupt INTM
}

/* Function: init_board() -------------------------------------
 *
 * Abstract:
 *      This function initializes the board
 */

void init_board ()
{
  InitSysCtrl();

  /* Disable and clear all CPU interrupts */
  DINT;
  IER = 0x0000;
  IFR = 0x0000;

  InitPieCtrl();
  InitPieVectTable();

  /* initial SPI function.... */

  /* initial SCI function.... */

  /* Initialize SPIModule with following parameters:
   *    BaudRate          : 9600 
   *    CharacterLengthBits: 8 
   *    ClockSpeed      : 150 
   *    EnableLoopBack : 0 , off
   *    EnableParity    : 0 ,off
   *    NumberOfStopBits    : 1 
   *    ParityMode    : 2 ,Even
   *    SuspensionMode    : 3 ,Free_run
   *    UARTInterface :  2 ,To/From_host_block */
  init_SCI (9600,8,150,0,0,1,2,3,2);
}