read_head.inc

em4100的解码程序

		;inc		p0_bit
		;nop
		
		sz		p0_bit.0		;1的个数为偶数,p0_bit.0=0,skip
		jmp		com_p0
		
		sz		p0				;p0=0,skip
		jmp		other55_data_error
		jmp		p0_ok
com_p0:	;1的个数为奇数
		snz		p0				;p0=1,skip
		jmp		other55_data_error		
		jmp		p0_ok
		
p0_ok:

		;-------------------------300ms
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz
       
     
		jmp		$	
		
		;-----------------------p1
		sz		d10
		inc		p1_bit
		
		sz		d11
		inc		p1_bit
		
		sz		d12
		inc		p1_bit
	
		sz		d13
		inc		p1_bit
		
		sz		p1
		inc		p1_bit
		nop
		
		sz		p1_bit.0		;1的个数为偶数,p1_bit.0=0,skip
		jmp		com_p1
		
		sz		p1				;p1=0,skip
		jmp		other55_data_error
		jmp		p1_ok
		
com_p1:	;1的个数为奇数
		snz		p1				;p1=0,skip
		jmp		other55_data_error
		jmp		p1_ok
p1_ok:
if 0
			;-------------------------300ms
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz		
endif		
		;jmp		$
		;----------------------p2
		sz		d20
		inc		p2_bit
		
		sz		d21
		inc		p2_bit
		
		sz		d22
		inc		p2_bit
	
		sz		d23
		inc		p2_bit
		
		sz		p2
		inc		p2_bit
		nop
		
		sz		p2_bit.0		;1的个数为偶数,p1_bit.0=0,skip
		jmp		com_p2
		
		sz		p2				;p1=0,skip
		jmp		other55_data_error
		jmp		p2_ok
		
com_p2:	;1的个数为奇数
		snz		p2				;p1=0,skip
		jmp		other55_data_error
		jmp		p2_ok
p2_ok:		
			;-------------------------300ms
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz
			
		jmp		$
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		;----------------------4个列偶校验
			;------------------pc0
		sz		d00				;d00=0,skip
		inc		pc0_bit
		
		sz		d10			
		inc		pc0_bit
		
		sz		d20
		inc		pc0_bit
		
		sz		d30
		inc		pc0_bit
		
		sz		d40
		inc		pc0_bit
		
		sz		d50
		inc		pc0_bit
		
		sz		d60
		inc		pc0_bit
		
		sz		d70
		inc		pc0_bit
		
		sz		d80
		inc		pc0_bit
		
		sz		d90
		inc		pc0_bit
		
		sz		pc0_bit.0		;1的个数为偶数，pc0_bit.0=0,skip	
		jmp		com_pc0_1	
			;--------1的个数为偶数
		sz		pc_0				;查看PC0,if pc0=0,skip
		jmp		other55_data_error	
		jmp		pc0_ok
		
			;--------1的个数为奇数
com_pc0_1:		
		snz		pc_0				;pc0=1,skip
		jmp		other55_data_error
		jmp		pc0_ok				

		;------------------pc1	
pc0_ok:		
		
		;-------------------------300ms
if 0
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz
        
        
	;	jmp		$
		
endif		
		
		
		
		
		sz		d01				;d00=0,skip
		inc		pc1_bit
		
		sz		d11			
		inc		pc1_bit
		
		sz		d21
		inc		pc1_bit
		
		sz		d31
		inc		pc1_bit
		
		sz		d41
		inc		pc1_bit
		
		sz		d51
		inc		pc1_bit
		
		sz		d61
		inc		pc1_bit
		
		sz		d71
		inc		pc1_bit
		
		sz		d81
		inc		pc1_bit
		
		sz		d91
		inc		pc1_bit
		
		sz		pc1_bit.0		;1的个数为偶数，pc1_bit.0=0,skip	
		jmp		com_pc1_1	
			;--------1的个数为偶数
		sz		pc_1				;查看PC1,if pc1=0,skip
		jmp		other55_data_error	
		jmp		pc1_ok
		
			;--------1的个数为奇数
com_pc1_1:		
		snz		pc_1				;pc0=1,skip
		jmp		other55_data_error
		jmp		pc1_ok	
		
		;------------------pc2	
		
pc1_ok:		
		;-------------------------300ms
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz
        
        
		jmp		$
		
		
		
		sz		d02				;d00=0,skip
		inc		pc2_bit
		
		sz		d12			
		inc		pc2_bit
		
		sz		d22
		inc		pc2_bit
		
		sz		d32
		inc		pc2_bit
		
		sz		d42
		inc		pc2_bit
		
		sz		d52
		inc		pc2_bit
		
		sz		d62
		inc		pc2_bit
		
		sz		d72
		inc		pc2_bit
		
		sz		d82
		inc		pc2_bit
		
		sz		d92
		inc		pc2_bit
		
		sz		pc2_bit.0		;1的个数为偶数，pc1_bit.0=0,skip	
		jmp		com_pc2_1	
			;--------1的个数为偶数
		sz		pc_2				;查看PC1,if pc1=0,skip
		jmp		other55_data_error	
		jmp		pc2_ok
		
			;--------1的个数为奇数
com_pc2_1:		
		snz		pc_2				;pc0=1,skip
		jmp		other55_data_error
		jmp		pc2_ok
		
		;------------------pc3
pc2_ok:	
		sz		d03				;d00=0,skip
		inc		pc3_bit
		
		sz		d13			
		inc		pc3_bit
		
		sz		d23
		inc		pc3_bit
		
		sz		d32
		inc		pc3_bit
		
		sz		d43
		inc		pc3_bit
		
		sz		d53
		inc		pc3_bit
		
		sz		d63
		inc		pc3_bit
		
		sz		d73
		inc		pc3_bit
		
		sz		d83
		inc		pc3_bit
		
		sz		d93
		inc		pc3_bit
		
		sz		pc3_bit.0		;1的个数为偶数，pc1_bit.0=0,skip	
		jmp		com_pc3_1	
			;--------1的个数为偶数
		sz		pc_3				;查看PC1,if pc1=0,skip
		jmp		other55_data_error	
		jmp		pc3_ok
		
			;--------1的个数为奇数
com_pc3_1:		
		snz		pc_3				;pc0=1,skip
		jmp		other55_data_error
		jmp		pc3_ok		
		
pc3_ok:
		;-------------------------300ms
		set		buzz
		mov		a,250
        call    delay_10ms
		;---------------100ms
        mov		a,250
        call    delay_10ms
        ;---------------200ms
        mov		a,250
        call    delay_10ms
        ;--------------------------------
        clr		buzz
        jmp		$		
		
		
		
		

;-------------------------------------
;		error	在接收过程中出错，重新提起同步信号
;-------------------------------------		
error:
		nop
head_data_error:
		nop
other55_data_error:		
		clr		p0_bit
		clr		p1_bit
		clr		p2_bit
		
		clr		pc0_bit
		clr		pc1_bit
		clr		pc2_bit
		clr		pc3_bit
		
		clr		flag
		clr		head0
		clr		head1
		
		clr		data0
		clr		data1
		clr		data2
		clr		data3
		clr		data4
		clr		data5
		clr		data6
		clr		data7
		clr		data8
		clr		data9
		clr		data10
		
		clr		head_count
		mov		a,9
		mov		head_count,a
		
		clr		data_count
		mov		a,55
		mov		data_count,a
		
		jmp		read_head