irq_timer.s

ATMEL的ADS例子1

;------------------------------------------------------------------------------
;-         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		include/AT91M42800A.inc

    INCLUDE   irq_arm.mac


;------------------------------------------------------------------------------
;- 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

;- Manage Exception Entry
        IRQ_ENTRY

;- Call the timer Interrupt C handler
		    ldr         r0, =AT91C_BASE_TC1
            ldr         r1, =timer1_c_irq_handler
            mov         r14, pc
            bx          r1
exit_irq
;- Manage Exception Exit
            IRQ_EXIT
            END