NC2-51 MCU Learning Board Experimental Program Example 4

rain

NC2-51 MCU Learning Board Experimental Program Example 4 [Copy link]

NC2-51 MCU Learning Board Experimental Program Example

51 MCU learning board finished product picture
NS-1 download line finished product picture

Programming functions:

　The NC2-51 single-chip microcomputer learning board has built-in programming function.

Go to http://www.nnssh.com/downloads/down3.htm to download the Easy pro isp download line driver.

When using, insert the NS-1 (ISP) download cable into the computer parallel port, connect the leads to the learning board (marked on the learning board), turn on the power of the learning board, open the programming program to burn the chip.

4. Sound experiments, such as alarm, song performance, prompt tone, etc.;
music output p3.3 pin
ORG 0000H
LJMP START
ORG 000BH
INC 20H ; interrupt service, interrupt counter plus 1
MOV TH0,#0D8H
MOV TL0,#0EFH ; 12M crystal oscillator, forming a 10 millisecond interrupt
RETI
START:
MOV SP,#50H
MOV TH0,#0D8H
MOV TL0,#0EFH
MOV TMOD,#01H
MOV IE,#82H
MUSIC0:
NOP
MOV DPTR,#DAT ; table header address sent to DPTR
MOV 20H,#00H ; interrupt counter cleared to 0
MUSIC1:
NOP
CLR A; ; A cleared
MOVC A,@A+DPTR; ; look up the table to get the code
JZ END0 ; if it is 00H, then end
CJNE A,#0FFH,MUSIC5; ；If it is a rest, execute
LJMP MUSIC3
MUSIC5:
NOP
MOV R6,A; ；R6=18H note frequency
INC DPTR; DPTR plus one
MOV A,#0
MOVC A,@A+DPTR; ；Get the beat code and send it to R7
MOV R7,A; ；R7=30H note pronunciation time
SETB TR0 ；Start counting
MUSIC2:
NOP
CPL p3.2; ；P3.2 is the music output pin
MOV A,R6
MOV R3,A; ；R3=R6=18H
LCALL DEL
MOV A,R7
CJNE A,20H,MUSIC2; ；Is the interrupt counter (20H) = R7?
；If not equal, continue the loop
MOV 20H,#00H ；If equal, get the next code
INC DPTR
LJMP MUSIC1
MUSIC3:
NOP ;Pause for 100 milliseconds
CLR TR0
MOV R2,#0DH ;R2=13
MUSIC4:
NOP
MOV R3,#0FFH ;R3=255
LCALL DEL
DJNZ R2,MUSIC4
INC DPTR
LJMP MUSIC1
END0:
NOP
MOV R2,#0FFH ;Song ends, delay for 1 second and continue
MUSIC6:
MOV R3,#00H
LCALL DEL
DJNZ R2,MUSIC6
LJMP MUSIC0
DEL:
NOP
DEL3:
MOV R4,#02H
DEL4:
NOP
DJNZ R4,DEL4
NOP
DJNZ R3,DEL3
RET
NOP
DAT:
DB 18H, 30H, 1CH, 10H
DB 20H, 40H, 1CH, 10H
DB 18H, 10H, 20H, 10H
DB 1CH, 10H, 18H, 40H
DB 1CH, 20H, 20H, 20H
DB 1CH, 20H, 18H, 20H
DB 20H, 80H, 0FFH, 20H
DB 30H, 1CH, 10H, 18H
DB 20H, 15H, 20H, 1CH
DB 20H, 20H, 20H, 26H
DB 40H, 20H,20H, 2BH
DB 20H, 26H, 20H, 20H
DB 20H, 30H, 80H, 0FFH
DB 20H, 20H, 1CH, 10H
DB 18H , 10H, 20H , 20H
DB 26H, 20H , 2BH , 20H
DB 30H, 20H , 2BH , 40H
DB 20H, 20H , 1CH , 10H
DB 18H, 10H, 20H, 20H
DB 26H, 20H , 2BH, 20H
DB 30H , 20H, 2BH , 40H
DB 20H, 30H, 1CH , 10H
DB 18H, 20H , 15H , 20H
DB 1CH, 20H , 20H , 20H
DB 26H, 40H, 20H , 20H
DB 2BH, 20H, 26H , 2 0H
DB 20H, 20H, 30H, 80H
DB 20H
, 30H, 1CH, 10H DB 20H, 10H, 1CH, 10H
DB 20H, 20H, 26H, 20H
DB 2BH, 20H, 30H, 20H
DB 2BH, 40H, 20H , 15H
DB 1FH, 05H, 20H , 10H
DB 1CH, 10H, 20H , 20H
DB 26H, 20H, 2BH , 20H
DB 30H, 20H, 2BH , 40H
DB 20H, 30H, 1CH , 10H
DB 18H, 20H , 15H , 20H
DB 1CH, 20H , 20H , 20H
DB 26H, 40H, 20H , 20H
DB 2BH, 20H, 26H , 20H
DB 20H, 20H, 30H, 30H
DB 20H, 30H, 1CH, 10H
DB 18H, 40H, 1CH, 20H
DB 20H, 20H, 26H, 40H
DB 13H, 60H, 18H , 20H
DB 15H, 40H, 13H , 40H
DB 18H, 80H, 00H
end