Decoupled Value Prediction on Trace Processors

1
8051????

• ?????? ???????
• ???

2
? ?

• 4??? ?? ??? ?? ???(full-duplex) ????? ?? ??
• ???? ???? ?? 2? ??(double buffer)? ??
• ??? ?? CPU? ?? ??? ???? ???? ???? ?? ???? ????
  ??? ??
• ?? ? ?? ??? ???? SBUF? ??
• ????? CPU? ??? ???? SBUF? ????? ?? ??? ?? ??? ??
  ????? ????,
• CPU? SBUF? ???? ?? ????? ????.

3
SCON ????

• Serial Port Control Register

4
SCON ????

• TI ? RI ??
• ?? 1??? ??? ???? ???? ???(empty)
• 1??? ???? ???? ?? ??(full) 1? ???? ????? ?????
  ???
• TB8 ? RB8 ??
• ?? 2? ?? 3? 11?? ????? 9?? ??? ??? ??
• ?? 1?? SM20? ?? RDB8? ???? ??
• SM0SM1 ??? ?? ??? ?? ??? ??

5
SCON ????

• SM2 ??
• 1? ???? ?? 2? ?? 3?? 9?? ??? RB81? ????? ???? ??
  ?? ????? ???? RB80? ???? ????? ???? ???.
• ?? 1?? SM21? ???? ??? ??? ??? ?? ??? ???? ???
  ???? ????? ????.
• ? MOV SCON, 52H 01010010B
• SM0 SM1 01 ?? 1, SM2 0
• REN 1 receive enable
• TI 1 transmint interrupt flag

6
PCON ????

• Power Control Register

7
PCON ????

• ???? ???? ??? 1? ???? ???? SMOD ??? ???? ????? 2?
  ?? ??
• ?? ??? ?? ?? 13?? SMOD0?? ???? ????? ????,
• SMOD1?? ????? 2? ?? ??? ????.
• SMOD0
• 0?? SCON.7 ??? SM0?? ????,
• 1?? SCON.7 ??? FE(Framing Error)? ????.

8
?? ?? 0

• ??? ???(half-duplex) ?? ??
• ??? ?? ??? ??????? ?? I/O ????? ???? ?? ?
• ? ????? TXD ??? ??? ???? ????, RXD? ?? ??? ?? ?
  ?? ??? ????.
• ??? ???? ?? 8??? ???? LSB?? ????, ????? ??? ???
  1/12? ????.

9
?? ?? 0

• ?? ??
• SBUF? ?? ???? ??????? ????,
• 1?? ??? ?? LSB(b0)?? ??? ????. ??? 1?? ???? 1???
  ????,
• MSB? ???? ?? TI ???? ??? 1? ????.
• ?? ??
• REN1? ???? ???? ???? ?? RI? 0?? ?????? ?? ????
  ??? ??
• RXD ??? ???? ?? ???? ? ??? TXD ??? ???? ?? ???
  ??? ?? ???? ?? ?? ??? ?? ??? ????? ??? ??
• 8??? ???? ?? ???? ??? ????? ???? SBUF? ???? ??
  ???? ?? RI? 1? ????.

10
?? ?? 1

• ?? ?? ???? ???? 10?? ???(1 ??? ??, 8 ??? ??, 1 ??
  ??)? ??? ?? ??
• ????? ??? 1?? ??? 2? ???? ???? ??? ??
• ??? 2? ???? ???? ?? ??? ?? ??? ?? ????? ?????? ?
  ???? ???? ??? ??? 1? ???? ?? ??? ??? 2? ????? ???
  ?? ??.

11
?? ?? 1

• ?? ??
• SBUF? ?? ???? ??????? ??
• SBUF? ????? ?? ?? ??? ????? 9?? ??? 1? ????, ???
  ????? ?? ??? ????.
• ????? 9?? ??? ?? ??? ???? ???? ??? TI? ???? ????
  ????? ????.
• ?? ??
• REN1? ???? RXD ??? ?? ??? ???? ??
• ??? ??? ???? ?????? ?? 8??? ??? D0D7? ???? ???
  ????? ??

12
?? ?? 1

• ????? 9??? ?? ??? 1? ???? ?????? RI0? ???? RI?
  1? ???? ?? ????? ????
• ?? SCON ?????? SM20?? ?? ??? ??? ???? RI0??? ??
  RI? ????.
• ??? ?? ??? SCON ????? RB8? ????, 8?? ??? ??? ???
  ?????? SBUF? ????.

13
?? ?? 2? 3

• 11?? ???(1 ??? ??, 8 ??? ??, ??????? 9?? ??, 1 ??
  ??)? ??? ?? ??
• ?? 3? ?? ?? ?????? ????? ???? ??? ??? ??
• 9?? ??? SCON ????? TB8 ??? ??????? ????, ??? 9??
  ??? SCON ????? RB8 ??? ????.
• SCON ?????? SM21? ???? RB8 ??? 1? ????? ???? ??
  ?? ????? ???? 0?? ??? ???? ????? ???? ???.

14
?? ?? 2? 3

• ?? 3? ?? 2? ??? ??? ???? ?? ?????? ???.
• ?? 2??? ????? ??? ??? 1/32?? 1/64? ??? ? ??? ???,
  
• ?? 3??? ????? ??? 1?? ??? 2? ???? ??? ??? ? ??.

15
????(Baud rate)? ??

• ?? ??? ?? ?? 1? 3
• ??? 1? ???? ??? ??? 2? ???? ??? ??.
• ???? ??? 1? ???? ???? ??? 1? ?? 2(8?? auto-reload
  mode)? ???? ???? ??? ??
• ???2? ???? ????? ????? ??? ?? ??. ??? ??? 2?
  16?? ???? ??? ??? ????? ??? ??? 11.0592MHz? ?????
  ??? ??? ????? ???? ? ??.

16
????(Baud rate)? ??
17
????(Baud rate)? ??
18
???? ?? ??
19
???? ?? ??
20
???? ? 1

• ????? OK-8051 ???? PC? ???? ???? ????
• p.581 asm12_1.asm ???? ??
• ???? ??? sw1sw4? ??? ??? ??? ?? ??? ???? PC?
  ???? PC? ??? ???? ????
• PC? ??? ???? ??
• ?? 1 ??
• MOV SCON, 52H SM0 SM1 01 ?? 1, SM2
  0REN 1 receive enableTI 1 transmint
  interrupt flag, ?? ???? ??

21
???? ? 1

• ???2 ???? ???? ??
• ????? J1 ??? ?? 9600bps? 19200bps ??
• PPI_PORTC? MSB1 ?? 19200bps, 0?? 9600bps
• 19200bps gt ??? 65516 9600bps gt ??? 65497
• Initialize Serial Port
• INIT_232
• MOV T2MOD,00H timer 2 baud rate
  generator
• MOV T2CON,34H baud rate
  generator mode, TR21
• MOV DPTR,PPI_PORTC 9600 or 19200 bps ?
• MOVX A,_at_DPTR
• JB ACC.7, BPS_19200

22
???? ? 1

• MOV DPTR,65497 9600 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL
• JMP OK_232
• BPS_19200
• MOV DPTR,65516 19200 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL
• OK_232
• MOV SCON,52H (8 bit, 1 stop, REN TI 1)
• MOV TXD_BUFFER,SBUF dummy read
• RET

23
???? ? 1

• ????
• ???? ??? ?? TI ?? ??? ?? ??TXD_CH JNB TI,TXD_CH
  transmit ready ?
• CLR TI if yes, clear TI and transmit
• MOV SBUF, TXD_BUFFER
• RET

24
???? ? 1

• INCLUDE(C\C51\ASM\OK8051.INC)
• CR EQU 0DH carriage return
• LF EQU 0AH line feed
• Main Program
• CSEG AT 8000H RAM start address of OK-8051
• CALL LCD_HOME1 display title
• LCALL LCD_STRING
• DB ' RS-232C ',0
• CALL LCD_HOME2
• LCALL LCD_STRING
• DB 'Press SW1-SW4 ! ',0
• CLR EA disable interrupts
• CALL INIT_232 initialize 80C32 serial port

25
???? ? 1

• READ_KEY
• CALL KEY_IN key input
• CJNE A,00001110B,CK_KEY2 SW1 ?
• MOV DPTR,PPI_PORTA turn on LED1
• MOV A,00000001B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW1 was pressed.',CR,LF,0
• JMP READ_KEY
• CK_KEY2
• CJNE A,00001101B,CK_KEY3 SW2 ?
• MOV DPTR,PPI_PORTA turn on LED2
• MOV A,00000010B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW2 was pressed.',CR,LF,0
• JMP READ_KEY

26
???? ? 1

• CK_KEY3
• CJNE A,00001011B,CK_KEY4 SW3 ?
• MOV DPTR,PPI_PORTA turn on LED3
• MOV A,00000100B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW3 was pressed.',CR,LF,0
• JMP READ_KEY
• CK_KEY4
• CJNE A,00000111B,READ_KEY SW4 ?
• MOV DPTR,PPI_PORTA turn on LED4
• MOV A,00001000B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW4 was pressed.',CR,LF,0
• JMP READ_KEY

27
???? ? 1

• Initialize Serial Port
• INIT_232
• MOV T2MOD,00H timer 2 baud rate
  generator
• MOV T2CON,34H
• MOV DPTR,PPI_PORTC 9600 or 19200 bps ?
• MOVX A,_at_DPTR
• JB ACC.7,BPS_19200
• MOV DPTR,65497 9600 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL
• JMP OK_232
• BPS_19200
• MOV DPTR,65516 19200 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL

28
???? ? 1

• OK_232
• MOV SCON,52H (8 bit, 1 stop, REN TI 1)
• MOV TXD_BUFFER,SBUF dummy read
• RET
• Transmit a Character(TXD_BUFFER)
• TXD_CH
• JNB TI,TXD_CH transmit ready ?
• CLR TI if yes, clear TI and transmit
• MOV SBUF,TXD_BUFFER
• RET
• Transmit ASCII String
• TXD_STRING
• POP DPH get start address of string
• POP DPL

29
???? ? 1

• TXD_STR1
• CLR A read a character. end string ?
• MOVC A,_at_ADPTR
• JZ TXD_STR2 if yes, return
• MOV TXD_BUFFER,A if no, transmit a character
• CALL TXD_CH
• INC DPTR
• JMP TXD_STR1
• TXD_STR2
• INC DPTR store new return address
• PUSH DPL
• PUSH DPH
• RET
• END

30
???? ? 2

• ????? OK-8051 ???? PC? ???? ????, PC? ??? ?? ???
  ???? ??? ?? ????
• p.586 asm12_3.asm ???? ??
• PC? ??? ???? ? 1? ????? ?? ???? ??
• PC???? ??? ???? ??

31
???? ? 2

• ???
• ??? ?? ? ???? ??
• ???? ????? ???? Q ??? ?? ????? ?? ???? ??? ?????
  ???? ???? ??? ?? ??? ?????? ??? KIT_FLAG.4 ??
• CLR EA disable interrupts
• CALL INIT_232 initialize 80C32 serial port
• SETB KIT_FLAG.4 set user serial interrupt flag
• SETB ES enable serial interrupts
• SETB EA

32
???? ? 2

• ?? ???? ?? ??
• RXD_CH
• JNB RI,RXD_CH1 receive ready ?
• MOV LCD_BUFFER,SBUF if yes, receive and clear
  RI
• CLR RI
• CALL LCD_DATA display a character
• INC CURSOR 16 characters OK ?
• MOV A,17
• CJNE A,CURSOR,RXD_CH1
• MOV CURSOR,1
• MOV LCD_BUFFER,0C0H
• CALL LCD_COMMAND
• CALL BEEP
• RXD_CH1
• RETI

33
???? ? 2

• CSEG AT 0FF23H TI, RI interrupt vectoring
• JMP RXD_CH
• END

34
???? ? 2

• INCLUDE(C\C51\ASM\OK8051.INC)
• CR EQU 0DH carriage return
• LF EQU 0AH line feed
• Main Program
• CSEG AT 8000H
• CALL LCD_HOME1 display title
• LCALL LCD_STRING
• DB ' RS-232C ',0
• CALL LCD_HOME2
• LCALL LCD_STRING
• DB ' ',0
• CLR EA disable interrupts
• CALL INIT_232 initialize 80C32 serial port
• SETB KIT_FLAG.4 set user serial interrupt
  flag
• SETB ES enable serial interrupts
• SETB EA

35
???? ? 2

• MOV CURSOR,1 initialize cursor position
• MOV LCD_BUFFER,0C0H
• CALL LCD_COMMAND
• MOV LCD_BUFFER,0FH cursor ON
• CALL LCD_COMMAND
• Key Scan and Transmit a String
• READ_KEY
• CALL KEY_IN key input
• CJNE A,00001110B,CK_KEY2 SW1 ?
• MOV DPTR,PPI_PORTA turn on LED1
• MOV A,00000001B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW1 was pressed.',CR,LF,0
• JMP READ_KEY
• CK_KEY2
• CJNE A,00001101B,CK_KEY3 SW2 ?

36
???? ? 2

• MOV DPTR,PPI_PORTA turn on LED2
• MOV A,00000010B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW2 was pressed.',CR,LF,0
• JMP READ_KEY
• CK_KEY3
• CJNE A,00001011B,CK_KEY4 SW3 ?
• MOV DPTR,PPI_PORTA turn on LED3
• MOV A,00000100B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW3 was pressed.',CR,LF,0
• JMP READ_KEY
• CK_KEY4
• CJNE A,00000111B,READ_KEY SW4 ?
• MOV DPTR,PPI_PORTA turn on LED4

37
???? ? 2

• MOV A,00001000B
• MOVX _at_DPTR,A
• CALL TXD_STRING transmit string by serial
  port
• DB 'SW4 was pressed.',CR,LF,0
• JMP READ_KEY
• Subroutines to Communicate by Serial Port
• Initialize Serial Port
• INIT_232
• MOV T2MOD,00H timer 2 baud rate generator
• MOV T2CON,34H
• MOV DPTR,PPI_PORTC 9600 or 19200 bps ?
• MOVX A,_at_DPTR
• JB ACC.7,BPS_19200
• MOV DPTR,65497 9600 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL
• JMP OK_232

38
???? ? 2

• BPS_19200
• MOV DPTR,65516 19200 bps
• MOV RCAP2H,DPH
• MOV RCAP2L,DPL
• OK_232
• MOV SCON,52H (8 bit, 1 stop, REN TI 1)
• MOV TXD_BUFFER,SBUF dummy read
• RET
• Transmit a Character(TXD_BUFFER)
• TXD_CH
• JNB TI,TXD_CH transmit ready ?
• CLR TI if yes, clear TI and transmit
• MOV SBUF,TXD_BUFFER
• RET
• Transmit ASCIIZ String
• TXD_STRING
• POP DPH get start address of string
• POP DPL

39
???? ? 2

• TXD_STR1
• CLR A read a character. end string ?
• MOVC A,_at_ADPTR
• JZ TXD_STR2 if yes, return
• MOV TXD_BUFFER,A if no, transmit a character
• CALL TXD_CH
• INC DPTR
• JMP TXD_STR1
• TXD_STR2
• INC DPTR store new return address
• PUSH DPL
• PUSH DPH
• RET
• Serial Port Interrupt Service Routine
• RXD_CH
• JNB RI,RXD_CH1 receive ready ?
• MOV LCD_BUFFER,SBUF if yes, receive and clear
  RI

40
???? ? 2

• CLR RI
• CALL LCD_DATA display a character
• INC CURSOR 16 characters OK ?
• MOV A,17
• CJNE A,CURSOR,RXD_CH1
• MOV CURSOR,1
• MOV LCD_BUFFER,0C0H
• CALL LCD_COMMAND
• CALL BEEP
• RXD_CH1
• RETI
• CSEG AT 0FF23H TI, RI interrupt vectoring
• JMP RXD_CH
• END

41
???? ??

• ???? ?2? ?????? ??? ??? LCD ??? ????? ?? ?? ????
  PC? ??? ???? echo back ??? ??? ????? ????