irq_timer.s

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

;------------------------------------------------------------------------------
;-         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 14/01/02  PFi    : Creation
;------------------------------------------------------------------------------

;------------------------------------------------------------------------------
;- Area Definition
;-----------------
;- Must be defined as function to put first in the code as it must be mapped
;- at SRAM.
;------------------------------------------------------------------------------
				AREA    AT91Lib, CODE, READONLY
	
				INCLUDE     periph/aic/irq.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
            IMPORT		TC0_DESC
            
timer0_asm_irq_handler

;- Manage Exception Entry 

            IRQ_ENTRY

;- Call the timer Interrupt C handler

            ldr         r1, =timer0_c_irq_handler
            ldr         r0, =TC0_DESC
            mov         r14, pc
            bx          r1

;- Manage Exception Exit

           IRQ_EXIT

;------------------------------------------------------------------------------
;- 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
            IMPORT		TC1_DESC

timer1_asm_irq_handler

;- Manage Exception Entry

            IRQ_ENTRY

;- Call the timer Interrupt C handler

            ldr         r1, =timer1_c_irq_handler
            ldr         r0, =TC1_DESC
            mov         r14, pc
            bx          r1

;- Manage Exception Exit

           IRQ_EXIT

            END


END