sdcc/support/regression/tests/iobit.c.in

   1 /** Tests for bit access in I/O space.
   2
   3     pin: 0, 1, 2, 3, 4, 5, 6, 7
   4  */
   5 #include <testfwk.h>
   6
   7 #include <stdint.h>
   8
   9 #if (defined(__SDCC_pdk13) || defined(__SDCC_pdk14) || defined(__SDCC_pdk15) || defined(__SDCC_z80) || defined(__SDCC_z80n) || defined(__SDCC_z180) || defined(__SDCC_ez80_z80))
  10 __sfr __at(0x10) PORT;
  11 #elif defined(__SDCC_mcs51)
  12 __sfr __at(0x99) PORT;
  13 #else
  14 unsigned char PORT;
  15 #endif
  16
  17 #define PIN {pin}
  18
  19 void foo_a(void) {
  20     static char cnt;
  21     PORT = (cnt++ & 5) ? (PORT | (1<<PIN)) : (PORT & ~(1<<PIN));
  22 }
  23
  24 void foo_b(void) {
  25     static char cnt;
  26     PORT = (cnt & (1<<5)) ? (PORT | (1<<PIN)) : (PORT & ~(1<<PIN));
  27     cnt++;
  28 }
  29
  30 void bar1(void) {
  31         if (PORT & (1 << PIN))
  32                 foo_a();
  33 }
  34
  35 void bar0(void) {
  36         if (!(PORT & (1 << PIN)))
  37                 foo_a();
  38 }
  39
  40 void
  41 testBug (void)
  42 {
  43 }
  44