lab10.asm

.eqv SEVENSEG_LEFT    0xFFFF0011 # Dia chi cua den led 7 doan trai. 
                                    #     Bit 0 = doan a;  
                                    #     Bit 1 = doan b; ...  
                                    #     Bit 7 = dau . 
.eqv SEVENSEG_RIGHT   0xFFFF0010 # Dia chi cua den led 7 doan phai 
.text 
main:     
          li    $a0,  0x06              # set value for segments 
          jal   SHOW_7SEG_LEFT          # show 
          nop 
          li    $a0,  0x3F              # set value for segments 
          jal   SHOW_7SEG_RIGHT         # show    
          nop  
exit:     li    $v0, 10 
          syscall 
endmain: 
#--------------------------------------------------------------- 
# Function  SHOW_7SEG_LEFT : turn on/off the 7seg 
# param[in]  $a0   value to shown        
# remark     $t0 changed 
#--------------------------------------------------------------- 
SHOW_7SEG_LEFT:  li   $t0,  SEVENSEG_LEFT # assign port's address  
                 sb   $a0,  0($t0)        # assign new value   
                 nop 
                 jr   $ra 
                 nop          
#--------------------------------------------------------------- 
# Function  SHOW_7SEG_RIGHT : turn on/off the 7seg 
# param[in]  $a0   value to shown        
# remark     $t0 changed 
#--------------------------------------------------------------- 
SHOW_7SEG_RIGHT: li   $t0,  SEVENSEG_RIGHT # assign port's address 
                 sb   $a0,  0($t0)         # assign new value  
                 nop 
                 jr   $ra    
                 nop