progs/testbench.s

   1 #include "dt_inc.s"
   2 .text
   3 .org 0x0
   4         .define TIMER_BASE, 0x2040
   5         .define T_STCFG, 0x0
   6         .define T_VAL, 0x4
   7 start:
   8         br+ main
   9         br+ main
  10         ret
  11 main:
  12         call+ u_init
  13         call+ u_recv_byte
  14         call u_send_newline
  15
  16         ldis r1, 0x42
  17         call u_send_byte
  18
  19         ldis r11, TIMER_BASE@lo
  20         ldih r11, TIMER_BASE@hi
  21
  22         ldis r1, 0x1
  23         stw r1, T_STCFG(r11)
  24
  25 loop:
  26         call u_recv_byte
  27         cmpi r0, 0x42
  28         breq bla
  29         ldw r1, T_VAL(r11)
  30         call u_send_uint
  31         call u_send_newline
  32         br loop
  33
  34 bla:
  35         ldis r1, 0
  36         stw r1, T_VAL(r11)
  37         br loop