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1、一、数码管显示字符表一个数码管有八段：a,b,c,d,e,f,g,dp(小数点)，即由八段发光二极管组成。因为发光二极管导通的方向是一定的（导通电压一般取为1.7V），这八个发光二极管的公共端有两种：可以分别接+5V（即为共阳极数码管）或接地（即为共阴极数码管）；故可分共阳极（公共端接高电平或+5V电压）和共阴极（共低电平或接地）两种数码管。其中每个段均有0（不导通）和1（导通发光）两种状态，但共阳极数码管和共阴极数码管显然是不同的。一个八段数码管称为一位，多个数码管并列在一起可构成多位数码管，它们的段选线（即a,b,c,d,e,f,g,dp）连在一起，而各自的公共端称为位选线。对于共阳数极码
2、管：各段选为低电平（即0接地时）选中各数码段, 位选为高电平（即1）选中数码管。对于共阴极数码管：各段选为高电平（即1接+5V时）选中各数码段,位选为低电平（即0）选中数码管。显示时，都从段选线送入字符编码，而选中哪个位选线，那个数码管便会被点亮。数码管的8段，对应一个字节的8位，a对应最低位，dp对应最高位。所以如果想让数码管显示数字0，那么共阴数码管的字符编码为00111111，即0x3f；共阳数码管的字符编码为11000000，即0xc0。可以看出两个编码的各位正好相反。字母显示： 共阳极的数码管0f的段编码：unsigned char code table= /共阳极0f数码管编码0x
3、c0,0xf9,0xa4,0xb0,/030x99,0x92,0x82,0xf8,/470x80,0x90,0x88,0x83,/8b0xc6,0xa1,0x86,0x8e /cf;共阴极的数码管0f的段编码是：unsigned char code table=/共阴极0f数码管编码0x3f,0x06,0x5b,0x4f,/030x66,0x6d,0x7d,0x07,/470x7f,0x6f,0x77,0x7c,/8b0x39,0x5e,0x79,0x71/cf;共阳极数码管字符表显示内容dpgfedcba二进制十六进制011000000110000000XC01111110011111100
4、10XF9210100100101001000XA4310110000101100000XB0410011001100110010X99510010010100100100X92610000010100000100X82711111000111110000XF8810000000100000000X80910010000100100000X90A10001000100010000X88B10000011100000110X83C11000110110001100XC6D10100001101000010XA1E10000110100001100X86F10001110100011100X8E0
5、.01000000010000000X401.01111001011110010X792.00100100001001000X243.00110000001100000X304.00011001000110010X195.00010010000100100X126.00000010000000100X27.01111000011110000X788.00000000000000000X009.00010000000100000X10不显示11111111111111110XFF共阴极数码管字符表显示内容dpgfedcba二进制十六进制000111111001111110X3F100000110
6、000001100X06201011011010110110X5B301001111010011110X4F401100110011001100X66501101101011011010X6D601111101011111010X7D700000111000001110X07801111111011111110X7F901101111011011110X6FA01110111011101110X77B01111100011111000X7CC00111001001110010X39D01011110010111100X5EE01111001011110010X79F01110001011100010X710.10111111101111110XBF1.10000110100001100X862.11011011110110110XDB3.11001111110011110XCF4.11100110111001100XE65.11101101111011010XED6.11111101111111010XFD7.10000111100001110X878.11111111111111110XFF9.11101111111011110XEF不显示00000000000000000X00
