/*SINE4INT.C-SINE PROGRAM WITH 4 POINTS USING INTERRUPTS                */
#include "aiccomc.c"                      /*AIC comm routines           */     
int AICSEC[4] = {0x162c,0x1,0x4892,0x67}; /*config data for AIC         */
int data_out, loop = 0;                   /*declare global variables    */
int sin_table[4] = {0,1000,0,-1000};      /*values for 4-point sinewave */
int ampt_ctrl = 10;
int delay_cnt = 0;

void c_int04()
{
   asm("    AND    0FFFFFFF7h,IE");
   delay_cnt = 0;
   if (ampt_ctrl < 10)
      ampt_ctrl++;
   else ampt_ctrl = 0; 
}

void c_int05()                            
{
  int out;
  out = sin_table[loop] * ampt_ctrl * 0.1;
  PBASE[0x48] = out  << 2;     /*output value from sine table*/
  if (loop < 3) ++loop;                   /*increment loop counter < 3  */
  else loop = 0;                          /*reset loop counter          */
  if (delay_cnt < 5000)
      delay_cnt++;
  else if (delay_cnt == 5000)
  {
      asm("    AND     0FFFFFFF7h,IF");
      asm("    OR       00000008h,IE");       
  }
  else asm("    OR       00000008h,IE"); 
}                                                                       

main()
{
  asm("    OR       00000008h,IE");       /*enable EINT3 CPU interrupt*/
  AICSET_I();                             /*function to configure AIC   */ 
  for (;;);                               /*wait for interrupt          */
}