irq_timer.s

开发环境:ADS 1.2/SDT 2.51 GUI测试

;------------------------------------------------------------------------------
;-         ATMEL Microcontroller Software Support  -  ROUSSET  -
;------------------------------------------------------------------------------
; The software is delivered "AS IS" without warranty or condition of any
; kind, either express, implied or statutory. This includes without
; limitation any warranty or condition with respect to merchantability or
; fitness for any particular purpose, or against the infringements of
; intellectual property rights of others.
;------------------------------------------------------------------------------
;- File source          : irq_timer.s
;- Object               : Assembler timer Interrupt Handler.
;-
;- 1.0 14/Feb/03 JPP     : Creation
;------------------------------------------------------------------------------

;------------------------------------------------------------------------------
;- Area Definition
;------------------------------------------------------------------------------
	AREA        itHandler, CODE, READONLY

    INCLUDE		eb40a.inc
    
;	IMPORT 		OSIntEnter
;    IMPORT 		OSIntExit
    
;------------------------------------------------------------------------------
;- Function             : timer0_asm_irq_handler
;- Treatments           : Timer 0 interrupt handler.
;- Called Functions     : timer0_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
;	EXPORT timer0_asm_irq_handler
;	IMPORT timer0_c_irq_handler
;timer0_asm_irq_handler
;
;;- Manage Exception Entry
;        IRQ_ENTRY
;
;;- Call the timer Interrupt C handler
;		    ldr         r0, =AT91C_BASE_TC0
;            ldr         r1, =timer0_c_irq_handler
;            mov         r14, pc
;            bx          r1
;;- Irq exit
;;- Manage Exception Exit
;            b			exit_irq

;------------------------------------------------------------------------------
;- Function             : timer1_asm_irq_handler
;- Treatments           : Timer 1 interrupt handler.
;- Called Functions     : timer1_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
            EXPORT      timer1_asm_irq_handler
            IMPORT      timer1_c_irq_handler
            
timer1_asm_irq_handler
			
			STMFD 		SP!,{R0-R3,R12,LR}
	
		    ldr         r0, =AT91C_BASE_TC1
	        ldr         r12, =timer1_c_irq_handler
	        mov         r14, pc
	        bx          r12
	        
;- Mark the End of Interrupt on the AIC
		    LDR			R0, =AT91C_BASE_AIC			;AIC_BASE
		    STR			R0, [R0, #AIC_EOICR]
          	
          	LDMFD 		SP!, {R0-R3,R12,LR}
	    	SUBS 		PC, LR,#4
	    	
;------------------------------------------------------------------------------
;- Function             : timer2_asm_irq_handler
;- Treatments           : Timer 2 interrupt handler.
;- Called Functions     : timer2_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
            EXPORT      timer2_asm_irq_handler
            IMPORT      timer2_c_irq_handler
            
timer2_asm_irq_handler
			
			STMFD 		SP!,{R0-R3,R12,LR}

;- Call the timer Interrupt C handler
		    ldr         r0, =AT91C_BASE_TC2
            ldr         r1, =timer2_c_irq_handler
            mov         r14, pc
            bx          r1
	        
;- Mark the End of Interrupt on the AIC
		    LDR			R0, =AT91C_BASE_AIC			;AIC_BASE
		    STR			R0, [R0, #AIC_EOICR]
          	
          	LDMFD 		SP!, {R0-R3,R12,LR}
	    	SUBS 		PC, LR,#4
            
	END