关于非接触式IC智能(射频)卡及其读写设备内核技术的研究与应用开发(连载9)
文章出处:http://www.nexussmartsolutions.com 作者:张敏 人气: 发表时间:2011年11月01日
3. 对MCM200(SB201)“Select”(选卡片) 指令的汇编语言应用程序的设计
功能:调用该汇编语言子程序,将执行MCM “Select”(选卡片) 指令操作。如果卡片读写器的天线之有效工作距离内有多张重叠的Mifare 1 非接触式IC射频卡,则该指令在程序员成功完成“AntiCollision”操作之后,将帮助程序员正式选择其中指定的一张卡片进行操作(包括密码存取,密码认证,卡片上指定扇区的读写,等等。)“Select”(选卡片) 指令操作将读取卡片的SIZE字节。
程序说明:
1.)在以下的汇编语言程序中,用到了一些其他的子程序(和上述的“Request std和Request all”指令操作中的相同),分别为:
D500US: (与上述功能相同);
H_SEND_TO_BUF01:(与上述功能相同);
H_SEND_TO_BUF23:(与上述功能相同);
SEND_TO_BUF01:(与上述功能相同);
SEND_TO_BUF23:(与上述功能相同);
DISPLAY:(与上述功能相同);
H_DISPLAY:(与上述功能相同);
等等。
2.)在以下的汇编语言程序中,读者可能会碰到一些寄存器变量,或其他应用子程序,这些可能是用于主控程序或是调试而用。特加以说明。
程序清单如下:
;====================MCM SELECT OPERATION=====================
select:
;SETB PSW.3
;SETB PSW.4
MOV A,#0CH
MOV R0,#01H
MOVX @R0,A ;STACON() = 0CH
MOV A,#0F0H
MOV R0,#02H
MOVX @R0,A ;ENABLE() = F0H
MOV A,#38H
MOV R0,#03H
MOVX @R0,A ;BCNTS() = 38H =56 D
MOV A,#08H
MOV R0,#04H
MOVX @R0,A ;BCNTR() = 08H <--RECEIVE ONE BYTE:SIZEBYTE
MOV A,#93H
MOV R0,#00H
MOVX @R0,A ;DATA() = 93H -->SELECT INSTRACTION CODE
MOV A,#70H
MOV R0,#00H
MOVX @R0,A ;IMPORTANT: DATA()=70H--BITCOUNT=70Hbits
;-----------------------------------------------------------------------
MOV R7,#04H ;R7 IS A COUNTER,FOR WRITING 04H BYTES TO DATA
MOV B,#00H
MOV R0,#00H
MOV R1,#40H ;THE FIRST ADDRESS OF SNR. 40H---43H
SELECT_WRT_LOOP:
MOV A,@R1
MOVX @R0,A
XRL B,A
INC R1
DJNZ R7, SELECT_WRT_LOOP
MOV A,B
MOVX @R0,A ;SEND THE 5th CHK_SUM_VALUE
MOV A,#0AH
MOV R0,#06H
MOVX @R0,A ;TOC() = 0AH
SEL_RD_STACON_AGAIN:
MOV R0,#01H
MOVX A,@R0 ;READ STACON() ==> A
MOV B,A
JNB ACC.7, SEL_RD_STACON_AGAIN ;IF DV=1? IF NOT,REPEAT READ
MOV B,A
;------------- NOW DV=1, DATA VALID ----------------------
MOV A,#00H
MOV R0,#06H
MOVX @R0,A ;TOC() = 00H
;------------- NOW JUDGE ANY DATA ERRORS --------------------
MOV A,B
JB ACC.6, SEL_TE_ERR ;TE ERR
JB ACC.5, SEL_PE_ERR ;PE ERR
JB ACC.3, SEL_BE_ERR ;BE ERR
JB ACC.4, SEL_CE_ERR ;CE ERR
;------------- NOW NO ERRORS,READING CARD SIZE -----------------
MOV R0,#00H
MOVX A, @R0 ;READ SIZE: DATA() ==> A
MOV 44H,A ;STORE SIZE IN 44H
ACALL SEND_TO_BUF01 ;SEND SIZE TO DISP_BUF_LOW
SETB P2.6 ;OK LAMP NOW WORKING P2.3
ACALL SPK_ON ;if ok then spk on
MOV B,#00H ;SELECT OPERATION'S OK RETURN_VALUE=00H
MOV A,B ;READY FOR DISSPLAY IN DISP_BUF_HIGH(23)
LJMP SEL_OK_EXIT ;IF OK, EXIT SELECT OPERATION
;-------------------ERRORS PROCESS-------------------------------
SEL_TE_ERR:
MOV B,#01H
LJMP SEL_ERR_EXIT
SEL_PE_ERR:
MOV B,#05H
LJMP SEL_ERR_EXIT
SEL_CE_ERR:
MOV B,#02H
LJMP SEL_ERR_EXIT
SEL_BE_ERR:
MOV R7,#0AH
ACALL D500US
MOV B,#0BH
LJMP SEL_ERR_EXIT
;----------------------EXIT------------------------
SEL_ERR_EXIT:
MOV A,B
SEL_OK_EXIT:
ACALL SEND_TO_BUF23 ;SEND ERR_RETURN_VALE TO DISP_BUF_HIGH
RET
;------------------------ End of MCM AntiCollision Operation -----------------
通过以上对MCM的几个指令的软件设计,读者应该能有较大的信心,将MCM其他的一些指令也能设计成功。以供主控程序随时调用。
(二). 对MCM200(SB201)组成的DEMO电路的主控应用程序设计和开发
1. 硬件电路请参照所附的DEMO电路图纸
2. 软件清单如下
程序清单如下:
;====================================================================
; WRITTEN BY ROCKY, OCT'1999
;====================================================================
ORG 0000H
start:
LJMP MAIN
NOP
NOP
;--------------------------
;ORG 001BH
;LJMP 0500H
;--------------------------
ORG 0080H
MAIN:
MOV SP,#0E1H
NOP
CLR EA ;CLOSE CPU INT
CLR P2.5 ;RESET MCM (-RST=0)
SETB P2.4 ;RESET MCM (-CS =1)
NOP
ACALL INIT_DISP_BUF
ACALL DISPLAY
ACALL H_DISPLAY
NOP
CLR P2.6 ;CLOSE OK LAMP
setb p2.0 ;disenable KB function
mov p1,#11110000b ;init P1 port:P1.0~~P1.3-->out (line)
; P1.4~~P1.7-->in (colum)
SETB P2.5 ;RESET MCM (-RST=1)
CLR P2.4 ;SELECT MCM (-CS=0)
ACALL D500MS
MOV A,#80H ;SOFTWARE_RESET MCM
MOV R0,#01H
MOVX @R0,A
ACALL D500MS
ACALL SPK_ON ;SPEAK ON
;MOV 21H,#01H ;THE kb_TEST_CHAR
KB_LOOKING:
LCALL KB_SCAN
ACALL DISPLAY
ACALL H_DISPLAY
CLR P2.6 ;CLOSE OK LAMP P2.3
AJMP KB_LOOKING
KB_ALL_EXIT:
MOV R2,#00H ;SET RQT_STD
SETB P2.5 ;RESET: MCM ON (-RST=1) P1.4
CLR P2.4 ;SELECT MCM ON (-CS=0) P1.5
;------------------------------------
REPEAT:
SETB P2.5 ;RESET: MCM ON (-RST=1)P1.4
CLR P2.4 ;SELECT MCM ON (-CS=0) P1.5
;==================================================
ACALL REQUEST ;MCM REQUEST OPERATION
;==================================================
ACALL DISPLAY
ACALL H_DISPLAY
ACALL D500MS
CLR P2.6 ;CLEAR OKLAMP P2.3
ACALL INIT_DISP_BUF
ACALL DISPLAY
ACALL H_DISPLAY
;=========================================================
ACALL ANTICOLLISION ;MCM ANTICOLLISION OPERATION
;=========================================================
ACALL DISPLAY
ACALL H_DISPLAY
ACALL D500MS
CLR P2.6 ;CLEAR OKLAMP P2.3
ACALL INIT_DISP_BUF
ACALL DISPLAY
ACALL H_DISPLAY
;=========================================================
ACALL SELECT ;MCM SELECT OPERATION
;=========================================================
ACALL DISPLAY
ACALL H_DISPLAY
ACALL D500MS
CLR P2.6 ;CLEAR OKLAMP P2.3
ACALL INIT_DISP_BUF
ACALL DISPLAY
ACALL H_DISPLAY
;+++++++++++++++++++++ set up register/ram for load_key()++++++++++++++++++
mov 7FH,#0ABH
MOV 7EH, #00H ;(7EH) = 00H-->SELECT KEYSET0 (KS1=0;KS0=0)
MOV 7DH,#02H ;(7DH): 1)SELECT KEYA or KEYB
; 2)SELECT sector_ADDRESS :0-15
MOV 7CH,#60H ;(7CH) = 47H-->TKey(1) FIRST ADDRESS
;=========================================================
ACALL LOAD_KEY ;MCM LOAD_KEY OPERATION
;=========================================================