irq_usart.s

arm9 9200 time 中断 程序

;串口中断汇编入口
;- File source          : irq_usart.s
;- Object               : Assembler Usart Interrupt Handler.
;-
;- 1.0 14/Feb/03 JPP     : Creation
;------------------------------------------------------------------------------

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

		INCLUDE		include/AT91M55800A.inc

    INCLUDE   irq_arm.mac

;串口0中断的汇编入口//040706
	EXPORT usart0_asm_irq_handler
	IMPORT Usart_c_irq_handler
usart0_asm_irq_handler
;- Manage Exception Entry
        IRQ_ENTRY
;- Call the PIO Interrupt C handler
            ldr         r0, =AT91C_BASE_US0
            ldr         r1, =Usart_c_irq_handler
            mov         r14, pc
            bx          r1
;- Irq exit
;exit_irq_usart0
;- Manage Exception Exit
        IRQ_EXIT

;------------------------------------------------------------------------------
;- Function             : usart1_asm_irq_handler
;- Treatments           : USART Controller Interrupt Handler.
;- Called Functions     : Usart_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
;串口1中断的汇编入口
	EXPORT usart1_asm_irq_handler
	IMPORT Usart_c_irq_handler
usart1_asm_irq_handler
;- Manage Exception Entry
        IRQ_ENTRY
;- Call the PIO Interrupt C handler
            ldr         r0, =AT91C_BASE_US1
            ldr         r1, =Usart_c_irq_handler
            mov         r14, pc
            bx          r1
;- Irq exit
;exit_irq
;- Manage Exception Exit
        IRQ_EXIT



;串口2中断的汇编入口//040706
;...

    END