【導(dǎo)讀】短、可靠性高等特點，給設(shè)計人員進(jìn)行產(chǎn)品開發(fā)方面帶來了諸多方便。通過FPGA器件實現(xiàn)數(shù)字溫度表系統(tǒng)功能，有效的克服了傳統(tǒng)的數(shù)字溫度計的缺點。EP2C5T144芯片進(jìn)行了計算機仿真，并給出了相應(yīng)的仿真結(jié)果。電路，由數(shù)碼管顯示溫度值。該溫度表具有結(jié)構(gòu)簡單，抗干擾能力強，功耗小，可靠性高，速度快反應(yīng)時間短等優(yōu)點。不僅如此，檢測還涉及國計民生各個部門，可以說在所以科學(xué)技術(shù)領(lǐng)域無時。科學(xué)技術(shù)的發(fā)展和檢測技術(shù)的發(fā)展是密切相關(guān)的?，F(xiàn)代化的檢測手段能達(dá)。目前的溫度計中傳感器是它的重要組成部分，它的精度靈。溫度控制不好就可能引起生產(chǎn)安全，產(chǎn)品質(zhì)量和產(chǎn)量等一系列問題，由此可。期短、可靠性高，而且PCB面積及成本也會大大減少。介紹了數(shù)字溫度表系統(tǒng)的組成及工作原理，簡述了在。EDA平臺上用FPGA器件構(gòu)成該控制系統(tǒng)的設(shè)計思想和實現(xiàn)過程。溫度的采集與測量被廣泛應(yīng)用在人們的日常生活中。通濾波、多路轉(zhuǎn)換、信號放大、模數(shù)轉(zhuǎn)換等部分組成。

　　

【正文】 IF CP39。Event AND CP=39。139。THEN IF EC=39。139。THEN D=Din。 END IF。 END IF。 END PROCESS。 End Block ReadData。 Conversion:Block Signal V:Std_Logic_Vector(8 downto 0)。 Signal T:Std_Logic_Vector(7 downto 0)。 Begin V=(D amp。 39。039。) 100010001。 T=V(7 downto 0)。 Temp=T。 Value = 000000000000 When T = 0 Else 000000000001 When T = 1 Else 000000000010 When T = 2 Else 000000000011 When T = 3 Else 000000000100 When T = 4 Else 000000000101 When T = 5 Else 000000000110 When T = 6 Else 000000000111 When T = 7 Else 000000001000 When T = 8 Else 000000001001 When T = 9 Else 000000010000 When T = 10 Else 000000010001 When T = 11 Else基于 FPGA 的數(shù)字溫度計的設(shè)計 27 000000010010 When T = 12 Else 000000010011 When T = 13 Else 000000010100 When T = 14 Else 000000010101 When T = 15 Else 000000010110 When T = 16 Else 000000010111 When T = 17 Else 000000011000 When T = 18 Else 000000011001 When T = 19 Else 000000100000 When T = 20 Else 000000100001 When T = 21 Else 000000100010 When T = 22 Else 000000100011 When T = 23 Else 000000100100 When T = 24 Else 000000100101 When T = 25 Else 000000100110 When T = 26 Else 000000100111 When T = 27 Else 000000101000 When T = 28 Else 000000101001 When T = 29 Else 000000110000 When T = 30 Else 000000110001 When T = 31 Else 000000110010 When T = 32 Else 000000110011 When T = 33 Else 000000110100 When T = 34 Else 000000110101 When T = 35 Else 000000110110 When T = 36 Else 000000110111 When T = 37 Else 000000111000 When T = 38 Else 000000111001 When T = 39 Else 000001000000 When T = 40 Else 000001000001 When T = 41 Else 000001000010 When T = 42 Else 000001000011 When T = 43 Else 000001000100 When T = 44 Else 000001000101 When T = 45 Else 000001000110 When T = 46 Else 000001000111 When T = 47 Else基于 FPGA 的數(shù)字溫度計的設(shè)計 28 000001001000 When T = 48 Else 000001001001 When T = 49 Else 000001010000 When T = 50 Else 000001010001 When T = 51 Else 000001010010 When T = 52 Else 000001010011 When T = 53 Else 000001010100 When T = 54 Else 000001010101 When T = 55 Else 000001010110 When T = 56 Else 000001010111 When T = 57 Else 000001011000 When T = 58 Else 000001011001 When T = 59 Else 000001100000 When T = 60 Else 000001100001 When T = 61 Else 000001100010 When T = 62 Else 000001100011 When T = 63 Else 000001100100 When T = 64 Else 000001100101 When T = 65 Else 000001100110 When T = 66 Else 000001100111 When T = 67 Else 000001101000 When T = 68 Else 000001101001 When T = 69 Else 000001110000 When T = 70 Else 000001110001 When T = 71 Else 000001110010 When T = 72 Else 000001110011 When T = 73 Else 000001110100 When T = 74 Else 000001110101 When T = 75 Else 000001110110 When T = 76 Else 000001110111 When T = 77 Else 000001111000 When T = 78 Else 000001111001 When T = 79 Else 000010000000 When T = 80 Else 000010000001 When T = 81 Else 000010000010 When T = 82 Else 000010000011 When T = 83 Else基于 FPGA 的數(shù)字溫度計的設(shè)計 29 000010000100 When T = 84 Else 000010000101 When T = 85 Else 000010000110 When T = 86 Else 000010000111 When T = 87 Else 000010001000 When T = 88 Else 000010001001 When T = 89 Else 000010010000 When T = 90 Else 000010010001 When T = 91 Else 000010010010 When T = 92 Else 000010010011 When T = 93 Else 000010010100 When T = 94 Else 000010010101 When T = 95 Else 000010010110 When T = 96 Else 000010010111 When T = 97 Else 000010011000 When T = 98 Else 000010011001 When T = 99 Else 000100000000。 100 End Block Conversion。 Free_Counter:Block Signal Q :STD_LOGIC_VECTOR(15 DOWNTO 0)。 Begin PROCESS(CP) Begin IF CP39。Event AND CP=39。139。then Q=Q+1。 END IF。 END PROCESS。 ST=Q(15 DOWNTO 14)。 SELOUT=010WHEN ST=0 ELSE 001WHEN ST=1 ELSE 000WHEN ST=2 ELSE 111?；?FPGA 的數(shù)字溫度計的設(shè)計 30 SEL=110WHEN ST=0 ELSE 101WHEN ST=1 ELSE 011WHEN ST=2 ELSE 111。 END Block Free_Counter。 SELECT_BCD:Block BEGIN NUM= VALUE(3 DOWNTO 0)WHEN ST=0 ELSE VALUE(7 DOWNTO 4)WHEN ST=1 ELSE VALUE(11 DOWNTO 8)。 End Block SELECT_BCD。 SEVEN_SEGMENT : Block Begin SEG = 0111111 WHEN NUM = 0 ELSE 0000110 WHEN NUM = 1 ELSE 1011011 WHEN NUM = 2 ELSE 1001111 WHEN NUM = 3 ELSE 1100110 WHEN NUM = 4 ELSE