hpi.asm

5402DSP程序设计语言

;the HPI space in our system
;0x8000 8	HPIC0      bit 7   6   5  4  3   2   1       0
;0X8001	9	HPIC1                           TL1  TL0    BIL
;0X8002	a	HPID0(AUTO)                  1    00  HPIC
;0X8003	b	HPID1(AUTO)                  1    01  HPID  (ATO)
;0X8004	c	HPIA0                        1    10  HPIA
;0X8005	d	HPIA1                        1    11  HPID (NO ATO)
;0X8006	e	HPID0(NO AUTO)
;0X8007	f	HPID1(NO AUTO)
;result is 0x1002=AA 0x1003=DD

;A0-->HBIL    HBIL
;A1-->HCNTL0  HCNTL0
;A2-->HCNTL1  HCNTL1
;A15-->HCS    }C_HCS
;A3-->
;other pins connection
;HAS-->1
;HDS1-->IOSTRB   IOSTRB
;HDS2-->1
;HINT-->INT0     INT0
;HREADY-->BREADY BREADY 
;HR/W-->R/W      R/W    
;###########################################################
	.global _main
	.ref _InitC5402
_main:
	stm		0x1000,ar1
 
	st		0x00,*ar1
	portw	*ar1,0x8008 ;write 0x00 to HPIC0
	
	st		0x00,*ar1
	portw	*ar1,0x8009 ;write 0x00 to HPIC1
	
	st		0x10,*ar1
	portw	*ar1,0x800C ;write 0x10 to HPIA0
	
	st		0x20,*ar1
	portw	*ar1,0x800D ;write 0x20 to HPIA1
	;then the address is:0x1020
loop:
	st		0xAA,*ar1
	portw	*ar1,0x800e ;write 0x55 to HPID0(AUTO)
	nop
	nop
	nop
	stm		0x1002,ar2
	nop
	nop
	portr	0x800E,*ar2 ;read data from HPID0(AUTO)
	nop
	nop
	nop
	b	loop
	nop
	nop
	
	.end