CHAPTER 3 METHODOLOGY 3.1 Overview The Water Monitoring ...

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220U3ADC0804181716151413121112356719498DB0DB1DB2DB3DB4DB5DB6DB7CSRDWRINTRVI+VI-CLKRCLKVREFAGNDU65VU1Relay _SPDT_bCOMABNCNOU4AT89S5291819 29303112345678212223242526272810111213141516173938373635343332RSTXTAL2XTAL1PSENALE/PROGEA/VPPP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7P2.0/A8P2.1/A9P2.2/A10P2.3/A11P2.4/A12P2.5/A13P2.6/A14P2.7/A15P3.0/RXDP3.1/TXDP3.2/INTOP3.3/INT1P3.4/TOP3.5/T1P3.6/WRP3.7/RDP0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7R21kQ2Q2N3904U18MOTOR PUMP12D2D1N4001U25VU27NU24240 V AC (L)C1150pR110kU5SENSOR GP2D120VCCVoGNDFigure 3.9: Water Monitoring System Circuit
3.3 Programming.Programming is the main key to controlling the all process in system design. Inorder to processing data from ADC, display the result obtained by the hardware andcontrols the signal flow of the system. Two different programs were used, which isassembly language as machine programming and Visual Basic programming as interfacesoftware. Each program operates separately, but they interact with each other through theRS232 communication port.3.3.1 Assembly Language ProgrammingThe 8052 assembler language is a set of mnemonics specific to the 8051 family ofmicrocontrollers. To be able to program in this language using the mnemonics requires athorough knowledge of the architecture of the 8051 series microcontroller beingprogrammed. The mnemonics basically provide the tools to allow moving the data aboutthe microcontroller and activating its ports.Figure 3.10 shows the flow chart of microcontroller 8051 programming which iscloser to the hardware, and it is responsible for acquiring signals that have been convertedinto digital signal from ADC and control the motor pump using the data from sensor.23
Page 1 and 2: CHAPTER 3METHODOLOGY3.1 OverviewThe
Page 3 and 4: 3.2.2 Analog To Digital Conversion
Page 5 and 6: Figure 3.5: Source Code for Convers
Page 7: 3.2.4 Water Monitoring System Circu
Page 11 and 12: ISP flash programmer in Figure 3.11
Page 13 and 14: The Visual Basic program will start
Page 15 and 16: Distance(cm)ReadingVoltage Trial1 (
Page 17 and 18: 4.2 Signal ConversionA sensor has s
Page 19 and 20: 4.3 User InterfaceBased on Table 4.
Page 21 and 22: Hardware DesignBasically, the const
Page 23 and 24: CHAPTER 5CONCLUSION5.1 SummaryWater
Page 25 and 26: This project can be expanded by usi
Page 27 and 28: APPENDICES41
Page 29 and 30: cjne a,volt,xsamejmp startxsame:mov
Page 31 and 32: xsame19:jnc more19mov dptr,#XVALIDc
Page 33 and 34: etrx:jnb ri,$clr rimov a,sbufretdel
Page 35 and 36: ElseShape8.FillColor = vbWhiteEnd I
Page 37 and 38: Private Sub Timer3_Timer()Label3.Ca
Page 39 and 40: APPENDIX EData Sheet AT89S5253
Page 41 and 42: Features• Compatible with MCS-51
Page 43 and 44: AT89S52Block DiagramP0.0 - P0.7P2.0
Page 45 and 46: AT89S52weakly pulled high. Setting
Page 47 and 48: AT89S52Table 3a. AUXR: Auxiliary Re
Page 49 and 50: AT89S52Watchdog Timer(One-time Enab
Page 51 and 52: AT89S52Figure 6. Timer 2 Auto Reloa
Page 53 and 54: AT89S52Baud Rate GeneratorTimer 2 i
Page 55 and 56: AT89S52Oscillator CharacteristicsXT
Page 57 and 58: AT89S52frequency should be less tha
Page 59 and 60:
Figure 15. Flash Programming and Ve
Page 61 and 62:
AT89S52Table 9. Serial Programming
Page 63 and 64:
AT89S52Absolute Maximum Ratings*Ope
Page 65 and 66:
AT89S52External Program Memory Read
Page 67 and 68:
AT89S52Serial Port Timing: Shift Re
Page 69 and 70:
Packaging Information44A, 44-lead,
Page 71 and 72:
August 1997SemiconductorADC0802, AD
Page 73 and 74:
ADC0802, ADC0803, ADC0804Absolute M
Page 75 and 76:
ADC0802, ADC0803, ADC0804Electrical
Page 77 and 78:
ADC0802, ADC0803, ADC0804Typical Pe
Page 79 and 80:
ADC0802, ADC0803, ADC0804The device
Page 81 and 82:
ADC0802, ADC0803, ADC0804V IN ±5VR
Page 83 and 84:
ADC0802, ADC0803, ADC0804Figures 19
Page 85 and 86:
ADC0802, ADC0803, ADC0804IRQ (4)†
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