sdcc/support/regression/tests/sfr16.c

   1 /*
   2    sfr16.c
   3 */
   4
   5 #include <testfwk.h>
   6
   7 #if defined (__SDCC_mcs51)
   8   __sfr __at 0x8A SFR_LSB;        //timer 0 low byte
   9   __sfr __at 0x8C SFR_MSB;        //timer 0 high byte
  10   __sfr16 __at 0x8C8A SFR_16;     //timer 0
  11   __sfr32 __at 0x8C8ACDCC SFR_32; //timer 0 & 2
  12 #elif defined (__SDCC_ds390)
  13   __sfr __at 0x8B SFR_LSB;        //timer 1 low byte
  14   __sfr __at 0x8D SFR_MSB;        //timer 1 high byte
  15   __sfr16 __at 0x8D8B SFR_16;     //timer 1
  16   __sfr32 __at 0x8D8B8090 SFR_32; //timer 1 & P4 & P1
  17 #endif
  18
  19 void
  20 test_sfr (void)
  21 {
  22 #if defined (__SDCC_mcs51) || defined (__SDCC_ds390)
  23   SFR_16 = 0x00FE;
  24   ASSERT (SFR_MSB == 0x00);
  25   ASSERT (SFR_LSB == 0xFE);
  26
  27   SFR_16++;
  28   ASSERT (SFR_MSB == 0x00);
  29   ASSERT (SFR_LSB == 0xFF);
  30
  31   SFR_16++;
  32   ASSERT (SFR_MSB == 0x01);
  33   ASSERT (SFR_LSB == 0x00);
  34
  35   SFR_LSB++;
  36   ASSERT (SFR_16 == 0x0101);
  37
  38   SFR_32 = 0x12345678;
  39   SFR_32 -= 0x02040608;
  40   ASSERT (SFR_32 == 0x10305070);
  41 #endif
  42 }
  43