progs/uart_int.s

   1 #include "dt_inc.s"
   2
   3 .data
   4 .org 0x00
   5
   6 str:
   7         .ascii "sent byte: "
   8
   9 .text
  10 .org 0x00
  11 start:
  12         br+ main
  13         call+ intr
  14         ret
  15
  16
  17 main:
  18         ldi r0, INT_BASE
  19         ldi r1, INT_GLOBAL_BIT
  20         orx r1, INT_UART_REC_BIT
  21         stw r1, INT_CONF(r0)
  22
  23         br+ loop
  24
  25 loop:
  26         br+ loop
  27
  28 intr:
  29         ldi r1, str
  30         ldi r2, 11
  31         call u_send_string
  32
  33         ldi r0, UART_BASE
  34         ldw r1, UART_RECV(r0)
  35         call sseg_displ
  36         call u_send_uint
  37         call u_send_newline
  38         ret