51 single-chip microcomputer P1 mouth is connected to 8 LEDs. ; A pin switch K1 is connected to the external interrupt 0 input pin P3.2. ; A pin switch K2 is connected to the external interrupt 1 input pin P3.3. When the requirements K1 and K2 are not pressed, the 8 LEDs of the P1 port are shown as a streamer. ; When only K1 (P3.2) is pressed, the left and right 4 LEDs flash alternately. ; When only K2 (P3.3) is pressed, all 8 LEDs of P1 port will flash. ; Both external interrupts have the same priority. ;============================================= Use PROTSUE simulation interface as follows: The following procedures can meet the requirements. ORG 0000H SJMP MAIN ORG 0003H SJMP X0_INT ORG 0013H SJMP X1_INT ;------------------------------------ MAIN: MOV SP, #60H MOV IE, #85H MOV A, #254 M_LOOP: MOV P1, A RL A CALL DL_500MS SJMP M_LOOP ;------------------------------------ X0_INT: PUSH PSW SETB RS1 MOV P1, #0FH SH_0: XRL P1, #255 CALL DL_500MS JNB P3.2, SH_0 POP PSW RETI ;------------------------------------ X1_INT: PUSH PSW SETB RS0 MOV P1, #0 SH_1: XRL P1, #255 CALL DL_500MS JNB P3.3, SH_1 POP PSW RETI ;------------------------------- Delay subroutine DL_500MS: MOV R5, #9 ;1T DL1: MOV R6, #128 ;1T DL2: MOV R7, #215 ;1T NOP ;1T DL3: DJNZ R7, DL3; 2T 2 * 215 = 430 T DJNZ R6, DL2; 2T [1+1+430+2] * 128 = 55552 T DJNZ R5, DL1; 2T [1+55552+2] * 9 = 499995 T RET ;2T 1 + 499995 + 2 = 499998 T ;------------------------------------ END Motorcycle MP3 player with speaker
5 inch digital car bass tube with FM transmitter
Specifications:
1) With5 inch speaker, which makes music sounds more perspective.
2) Embedded amplifier, shows us a professional amplifier and subwoofer, which makes subwoofer smart, fashionable and perfectly.
3) Support USB, SD card slot and MP3 format ( line in socket), which provides you more music source are supported by our WeiDa subwoofers.
4) With remote control function
5) Previous/next button, bass
6) High power output.
7) FM radio function for option.
8) 12V
9) 6850C
10) Audio output
11) +10/-10 songs
12) Indicator light
13) Volume control
14) Pause playback
15) Remote control
16) Stations memory
17) Auto seek stations
18) Power output: 2x15W
19) USB mobile charger
20) Digital songs selection(by remote control)
21) Last position memory
22) Built in remote receiver
23) Repeat and mute function
24) EQ effect: Pop-rock-classic-jazz
25) Power direct connector, TRE OUT connector
26) USB port, SD-MMC slot, AUX in, compatible mp3 format
Optional voltage: DC12V or 24V, AC220V.
With plastic cover on both ends for option.
Motorcycle MP3 player with speaker,High Quality Motorcycle MP3 player with speaker,Motorcycle MP3 player with speaker Details, CN Jiangmen soundrace electronics and technology co.,ltd. , https://www.soundracegroup.com