【正文】 0A4H,0A4H,92H,92H,98H,82H,72H,78H,04H,0A4H,0A2H,0B2H,0B4H,0C4H,84H,82H,92H,94H,0A4HDB 04H,0C4H,0D4H,0C4H,0C8H,04H,94HDB 0E8H,0E4H,0E4H,0E8H,0E4H,0F4H,0D4H,0C4H,0B4H,84H,84H,92H,92H,94H,92H,02DB 0A4H,0A2H,0B2H,0B4H,0C4H,84H,82H,92H,94H,0A4H,04H,0C2H,0C2H,0D4H,0D8H,0D4H,0D2H,92HDB 0E8H,0E4H,0E4H,0E8H,0E4H,0F4H,0D4H,0C4H,0B4H,84H,84H,92H,92H,94H,92H,02DB 0A4H,0A2H,0B2H,0B4H,0C4H,84H,82H,92H,94H,0A4H,04H,0C2H,0C2H,0D4H,0D8H,0D4H,0D2H,92H。1 DB 82H,01H,81H,94H,84H DB 0B4H,0A4H,04H DB 82H,01H,81H,94H,84H DB 0C4H,0B4H,04H 。胡適的蘭花草 。1 DB 0A2H,0B2H,0D2H,0B2H,0A4H,0B2H,0D2H DB 0B2H,0A2H,82H,72H,88H DB 72H,82H,0A2H,82H,72H,62H,42H,62H DB 38H,38H 。5 DB 82H,84H,72H,82H,0A2H,84H DB 72H,82H,72H,62H,48H DB 32H,0A2H,82H,0F2H,0A2H,0B2H,82H,72H DB 68H,68H 。s entire line of products since it can perform many functions and developers will only have to learn this one platform. The basic architecture consists of the following features: an eight bit ALU 32 descrete I/O pins (4 groups of 8) which can be individually accessed two 16 bit timer/counters full duplex UART 6 interrupt sources with 2 priority levels 128 bytes of on board RAM separate 64K byte address spaces for DATA and CODE memory One 8051 processor cycle consists of twelve oscillator periods. Each of the twelve oscillator periods is used for a special function by the 8051 core such as op code fetches and samples of the interrupt daisy chain for pending interrupts. The time required for any 8051 instruction can be puted by dividing the clock frequency by 12, inverting that result and multiplying it by the number of processor cycles required by the instruction in question. Therefore, if you have a system which is using an clock, you can pute the number of instructions per second by dividing this value by 12. This gives an instruction frequency of 921583 instructions per second. Inverting this will provide the amount of time taken by each instruction cycle ( microseconds). Organization The 8051 architecture provides the user with three physically distinct memory spaces which can be seen in Figure A 1. Each memory space consists of contiguous addresses from 0 to the maximum size, in bytes, of the memory space. Address overlaps are resolved by utilizing instructions which refer specifically to a given address space. The three memory spaces function as described below. The CODE Space The first memory space is the CODE segment in which the executable program segment can be up to 64K (since it is addressed by 16 address lines) . The processor treats this segment as read only and will generate signals appropriate to access a memory device such as an EPROM. However, this does not mean that the CODE segment must be implemented using an EPROM. Many embedded systems these days are using EEPROM which allows the memory to be overwritten either by the 8051 itself or by an external device. This makes upgrades to the product easy to do since new software can be downloaded into the EEPROM rather than having to disassemble it and install a new EPROM. Additionally, battery backed SRAMs can be used in pl。7 DB 72H,74H,62H,44H,64H DB 0A8H,0A4H,02H,0A2H DB 0A2H,0B1H,0A1H,82H,0A2H,0B4H,0B2H,0C2H DB 0A2H,0B2H,0A2H,82H,78H 。3 DB 44H,02H,32H,44H,64H DB 72H,82H,72H,62H,72H,84H,0A2H DB 72H,74H,82H,0A4H,02H,062H DB 0A8H,0A8H 。2 DB 12H,0A2H,0D2H,92H,88H DB 82H,0B2H,0B2H,0A2H,84H,02H,72H DB 62H,72H,62H,52H,44H,02H,12H 。3 DB 82H,01H,81H,94H,84H DB 0B4H,0A4H,04H DB 82H,01H,81H,94H,84H DB 0C4H,0B4H,04H 。G=2/4 中華人民共和國國歌DB 04H,04H,0C2H,14H,12H,12H,12H,11H,11H,0C2H,0D1H,0E1H,14H,14H,02H,32H,12H,21H,31H,52H,51H,51H,54HDB 32H,31H,31H,12H,11H,31H,52H,51H,31H,24H,24H,24H,64H,54H,24H,34H,52H,34H,52H,32H,21H,31H,12H,11H,21H,34H,04HDB 52H,51H,0D1H,12H,12H,32H,31H,31H,52H,51H,51H,22H,22H,22H,0D2H,0D1H,0D1H,24H,22H,0C2H,14H,12H,12H,34H,32H,32H,54H,54H,54H,54HDB 12H,11H,31H,52H,51H,51H,64H,54H,32H,31H,11H,52H,52H,52H,32H,02H,12H,02H,0C4H,14HDB 0A2H,0A1H,11H,52H,52H,52H,32H,02H,12H,02H,0C4H,14H,0C4H,14H,0C4H,14H,14H,04HDB 04H,04H,04H,04HDB 00HTABLE4:DW 64260,64400,64524,64580 ,64684,64777,64280,64898,64968,65030,65058,65110,65157,65178,65217SONG4:DB 04H 。1=C 4/4 死了都要愛DB 04H,94HDB 0E8H,0E4H,0E4H,0E8H,0E4H,0F4H,0D4H,0C4H,0B4H,84H,84H,92H,92H,94H,92H,02HDB 0A4H,0A2H,0B2H,0B4H,0C4H,84H,82H,92H,94H,0A4HDB 04H,0C2H,0C2H,0D4H,0C2H,0D2H,0D8H,0D4H,0D2H,92HDB 0E8H,0E4H,0E4H,0E8H,0E4H,0F4H,0D4H,0C4H,0B4H,84H,84H,92H,92H,94H,92H,02HDB 0A4H,0A2H,0B2H,0B4H,0C4H,0E8H,0D8HDB 0C8H,0C8H,08H,08H,78H,28H,38H,34H,24HDB 24H,64H,64H,24H,64H,72H,72H,78H,58H,54H,44H,38H,34H,14H,34H,84H,74H,74H,62H,62H,0D8H,78H,28H,38H,34H,24HDB 24H,64H,64H,24H,64H,72H,72H,72H,94H,92H,94H,0A4H,58H,58H,54H,44H 。中斷返回DELAY: MOV 27H,26H 。中斷返回START_PAUSE:CPL F0 。對下首要演唱的歌曲的幾分拍進行調(diào)整,同時對R0中的內(nèi)容進行保護 MOV R4,00H MOV R0,30H MOV A,R7 ADD A,R0 MOV R0,A MOV DPH,R0 INC R0 MOV DPL,R0 INC R0 MOV A,R4 INC R4 MOVC A,A+DPTR MOV 26H,A 。將R7指向最后一首歌曲 MOV A,N1 MUL AB MOV R7,A AJMP BACK2 。關中斷 MOV A,22H ?；謴蚏0中的內(nèi)容 POP DPL 。不是最后一首，唱下一首,R7內(nèi)容加4，歌曲數(shù)加1 MOV A,R7 ADD A,4 MOV R7,ABACK: MOV R4,00H 。下一曲中斷程序處理，保護現(xiàn)場 PUSH DPH PUSH DPL CLR EA 。最后，衷心感謝這次對我的畢業(yè)設計提供無私幫助的所有老師和同學! 附 錄附錄一 音樂歌曲源代碼POP DPL POP DPHWWW: SETB EA AJMP START0 。同時要求我從程序編程，調(diào)試，軟件仿真和繪制開始，到硬件的焊接和調(diào)試，再到修改程序，在這期間我了解到了單片機開發(fā)的大致流程。并且交通燈的設計本身就是實用性很強的一套設計，在設計完全正確