irq_timer.s

这是ARM嵌入式开发中的中断源码

#------------------------------------------------------------------------------
#-         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
#------------------------------------------------------------------------------
            .GLOBAL      timer0_asm_irq_handler
            .EXTERN      timer0_c_irq_handler
            .EXTERN		 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
#------------------------------------------------------------------------------
            .GLOBAL      timer1_asm_irq_handler
            .EXTERN      timer1_c_irq_handler
            .EXTERN		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