www.pudn.com > ucosii_block.rar > LED_IA.ASM

;******************************************************************************************************** 
;                                    Embedded Systems Building Blocks 
;                                 Complete and Ready-to-Use Modules in C 
; 
;                                     Multiplexed LED Display Driver 
;                                            LED Multiplex ISR 
;                                        Intel 80x86 (LARGE MODEL) 
; 
;                            (c) Copyright 1999, Jean J. Labrosse, Weston, FL 
;                                          All Rights Reserved 
; 
; File : LED_IA.ASM 
; By   : Jean J. Labrosse 
;******************************************************************************************************** 
 
            PUBLIC _DispMuxISR 
 
            EXTRN  _DispMuxHandler:FAR 
            EXTRN  _OSIntExit:FAR 
            EXTRN  _OSIntNesting:BYTE 
 
.MODEL      LARGE 
.CODE 
.186 
 
;********************************************************************************************************* 
;                          OUTPUT NEXT SEGMENTS PATTERN TO LED DISPLAY MATRIX 
;                                         void DispMuxISR(void) 
;********************************************************************************************************* 
 
_DispMuxISR PROC FAR 
; 
            PUSHA                                ;Save processor's context 
            PUSH   ES 
            PUSH   DS 
; 
            INC    BYTE PTR _OSIntNesting        ; Notify uC/OS-II of ISR 
            CALL   FAR  PTR _DispMuxHandler      ; Call C routine to handle multiplexing 
            CALL   FAR  PTR _OSIntExit           ; Exit through uC/OS-II scheduler 
; 
            POP    DS                            ;Restore processor's context 
            POP    ES 
            POPA 
; 
            IRET                                 ;Return to interrupted code 
; 
_DispMuxISR ENDP 
 
            END