irq_usart.s

44BO 的UCGUI包

;------------------------------------------------------------------------------
;-         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_usart.s
;- Object               : Assembler Usart Interrupt Handler.
;-
;- 1.0 14/Feb/03 JPP     : Creation
;------------------------------------------------------------------------------

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

	INCLUDE		eb40a.inc
	
    
;------------------------------------------------------------------------------
;- Function             : usart0_asm_irq_handler
;- Treatments           : USART0 Controller Interrupt Handler.
;- Called Functions     : Usart0_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
	EXPORT usart0_asm_irq_handler
	IMPORT Usart0_c_irq_handler

usart0_asm_irq_handler
			
		STMFD 	SP!,{R0-R12,LR}
		
;- Call the PIO Interrupt C handler
        LDR     R0, =AT91C_BASE_US0
        LDR     R12, =Usart0_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-R12,LR}
    	SUBS 	PC, LR,#4

;------------------------------------------------------------------------------
;- Function             : usart1_asm_irq_handler
;- Treatments           : USART1 Controller Interrupt Handler.
;- Called Functions     : Usart1_c_irq_handler
;- Called Macros        : IRQ_ENTRY, IRQ_EXIT
;------------------------------------------------------------------------------
	EXPORT usart1_asm_irq_handler
	IMPORT Usart1_c_irq_handler

usart1_asm_irq_handler
			
		STMFD 	SP!,{R0-R12,LR}
		
;- Call the PIO Interrupt C handler
        ldr     r0, =AT91C_BASE_US1
        ldr     r1, =Usart1_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-R12,LR}
	    SUBS 	PC, LR,#4

	END