Отправлено SM 14 июня 2005 г. 15:20 В ответ на: (+) отправлено Doka 14 июня 2005 г. 14:16

		.global	start
		.sect	".init"
start:
; ----------- Set new interrupt vector's location
                         		bset	intm
		bclr	C54CM
		bclr	ARMS
		bclr	CPL
		
		rpt	#20
		nop
		mov	#0, port(#PLLCSR)
		rpt	#20
		nop
		
		amov	#3FFFh,xsp
		amov	#3EFFh,xssp
	
		rpt	#20
		nop
		
		mov	#vecs>>8,mmap(@IVPD)
		mov	#vecs>>8,mmap(@IVPH)
		
		rpt	#20
		nop      
		             
; ----------- Reset CPU for dual stack with fast return configuration
		
		reset           
		nop      
		nop      
		nop      
		nop      
		nop      
		nop      
		nop      
		nop      
		
halt:		b	halt
		.text

begin:	
		amov	#usrstack+STACKSIZE-2,xsp
		amov	#sysstack+STACKSIZE-2,xssp
		bclr	C54CM
		bclr	ARMS
		bclr	CPL
		; PLL
		mov	#8000h,port(#PLLDIV1)
		mov	#8003h,port(#PLLDIV2)
		mov	#10,port(#PLLM)
		rpt	#20
		nop
		mov	#1, port(#PLLCSR)
		
wait_lock:	rpt	#20
		nop
		mov	port(#PLLCSR),t0
		and	#20h,t0
		bcc	wait_lock,t0==#0

		; timer (12.288 MHZ TOUT1 for codec)
		mov	#0,port(#GPTGCTL_1)
		mov	#0,port(#GPTGCTL_0)
		mov	#0,port(#GPTCTL1_1)
		mov	#0,port(#GPTCTL1_0)
		
		rpt	#100
		nop
		
		mov	#10h,port(#TSSR)
		mov	#0003h, port(#GPTGCTL_1)
		mov	#11,port(#GPTPRD1_1)
		mov	#0,port(#GPTPRD2_1)
		mov	#0,port(#GPTPRD3_1)
		mov	#0,port(#GPTPRD4_1)
		mov	#0,port(#GPTCNT1_1)
		mov	#0,port(#GPTCNT2_1)
		mov	#0,port(#GPTCNT3_1)
		mov	#0,port(#GPTCNT4_1)
		mov	#0088h, port(#GPTCTL1_1)

		mov	#0003h, port(#GPTGCTL_0)
		mov	#2944*2,port(#GPTPRD1_0)
		mov	#0,port(#GPTPRD2_0)
		mov	#0,port(#GPTPRD3_0)
		mov	#0,port(#GPTPRD4_0)
		mov	#0,port(#GPTCNT1_0)
		mov	#0,port(#GPTCNT2_0)
		mov	#0,port(#GPTCNT3_0)
		mov	#0,port(#GPTCNT4_0)
		mov	#0080h, port(#GPTCTL1_0)
		; HPI - as GPIO
		mov	#0,port(#XBSR)
		
		rpt	#3
		nop
		
		mov	#0FF0h, port(#PGPIOEN2)
		mov	#0, port(#PGPIODIR2)
		
			;76543210
		mov	#11110000b, port(#IODIR)
		mov	#01110000b, port(#IODATA)
		mov	#0FFFFh,mmap(@IFR0)
		mov	#0FFFFh,mmap(@IFR1)
		mov	#1210h, mmap(@IER0)
		mov	#0094h, mmap(@IER1)
		bclr	intm		
                .sect   ".vectors"
                
	               			;SINT IER/IMR Description  
vecs:		.ivec	begin, USE_RETA	; 00  00 0001 Reset
		.ivec	iret1		; 01  01 0002 NMI
		.ivec	iret1		; 02  02 0004 Ext. #0
		.ivec	iret1		; 03  03 0008 Ext. #2
		.ivec	timer_int	; 04  04 0010 Timer #0
		.ivec	iret1		; 05  05 0020 MCBSP #0 RX
		.ivec	iret1		; 06  06 0040 MCBSP #1 RX
		.ivec	iret1		; 07  07 0080 MCBSP #1 TX
		.ivec	iret1		; 08  08 0100 USB
		.ivec	dmac1_int	; 09  09 0200 DMAC #1
		.ivec	iret1		; 10  10 0400 HPI
		.ivec	iret1		; 11  11 0800 Ext #3, WDT
		.ivec	uart_int	; 12  12 1000 UART
		.ivec	iret1		; 13  13 2000 --- reserved ---
		.ivec	iret1		; 14  14 4000 DMAC #4
		.ivec	iret1		; 15  15 8000 DMAC #5
		.ivec	iret1		; 16  00 0001 Ext #1
		.ivec	iret1		; 17  01 0002 MCBSP #0 TX
		.ivec	dmac0_int	; 18  02 0004 DMAC #0
		.ivec	iret1		; 19  03 0008 Ext #4, RTC
		.ivec	dmac2_int	; 20  04 0010 DMAC #2
		.ivec	iret1		; 21  05 0020 DMAC #3
		.ivec	iret1		; 22  06 0040 Timer #1
		.ivec	i2c_int		; 23  07 0080 I2C
		.ivec	iret1		; 24  08 0100 Bus access error
		.ivec	iret1		; 25  09 0200 Data log int
		.ivec	iret1		; 26  10 0400 RTOS int
		.ivec	iret1		; 27  11 0800 SINT 27
		.ivec	iret1		; 28  12 1000 SINT 28
		.ivec	iret1		; 29  13 2000 SINT 29
		.ivec	iret1		; 30  14 4000 SINT 30
		.ivec	iret1		; 31  15 8000 SINT 31
                
               
                .text