int_test2.psm

来自「和picoblaze完全兼容的mcu ip core」· PSM 代码 · 共 26 行

             ;Interrupt example
             ;
             constant waveform_port, 2             ;bit0 will be data
             constant counter_port, 4
             constant pattern_10101010, $AA
             register interrupt_counter, $1a
             ;
      start: load interrupt_counter, 00             ;reset interrupt counter
             load s2, pattern_10101010             ;initial output condition
             interrupt enable
             ;
 drive_wave: output s2, waveform_port
             load s0, 07                           ;delay size
       loop: sub s0, 01                            ;delay loop
             jump nz, loop
             xor s2, $FF                            ;toggle waveform
             jump drive_wave
             ;
             address $2B0
int_routine: add interrupt_counter, 01              ;increment counter
             output interrupt_counter, counter_port
             returni enable
             ;
             address $3FF                            ;set interrupt vector
             jump int_routine