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<P class=Label>標簽： <A title=max7219
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<H1><A
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<P><A
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<P>#include "reg52.h"<BR>#include "my_type.h"</P>
<P>#define Addr_No_Op 0x00 //不工作寄存器地址<BR>#define
Addr_Digit0 0x01<BR>#define Addr_Digit1
0x02<BR>#define Addr_Digit2 0x03<BR>#define Addr_Digit3
0x04<BR>#define Addr_Digit4 0x05<BR>#define Addr_Digit5
0x06 <BR>#define Addr_Digit6 0x07<BR>#define Addr_Digit7
0x08<BR>#define Addr_Decode_Mode 0x09
//譯碼模式寄存器地址<BR>#define Addr_Intensity
0x0a //亮度控制寄存器地址（max7221）<BR>#define Addr_Scan_Limit
0x0b //掃描控制寄存器地址<BR>#define Addr_Shutdowm
0x0c //掉電模式寄存器地址<BR>#define Addr_Display_Test
0x0f //顯示檢測寄存器地址</P>
<P>sbit Max7219_Din=P1^5;<BR>sbit Max7219_Load=P1^6;<BR>sbit
Max7219_Clk=P1^7;</P>
<P>uchar code max7219_7led_code[18]={0x7e,0x30,0x6d,0x79,
//0-1-2-3<BR>
0x33,0x5b,0x5f,0x70,
//4-5-6-7<BR>
0x7f,0x7b,0x01,0x4e,
//8-9-"-"-E<BR>
0x37,0x0e,0x67,0x00}; //H-L-P-空白 </P>
<P><BR>void wr_max7219(uchar addr,uchar dat)<BR>{<BR> uchar
i;<BR> Max7219_Load=0;<BR> Max7219_Clk=0;<BR> for(i=0;i<8;i++)<BR> {<BR> Max7219_Din
=
(bit)(addr&0x80);<BR> addr=addr<<1;<BR> Max7219_Clk=1;<BR> Max7219_Clk=0;<BR> }<BR> for(i=0;i<8;i++)<BR> { <BR> Max7219_Din=(bit)(dat&0x80);<BR> dat=dat<<1;<BR> Max7219_Clk=1;<BR> Max7219_Clk=0;<BR> } <BR> Max7219_Load=1;<BR> Max7219_Load=0;<BR>}<BR>main()<BR>{<BR>
uchar j;<BR> for(j=200;j>0;j--);<BR>
<BR> wr_max7219(Addr_Shutdowm,0x01);<BR> wr_max7219(Addr_Scan_Limit,0x07);<BR> wr_max7219(Addr_Intensity,0x0f);<BR> wr_max7219(Addr_Decode_Mode,0x00);<BR> wr_max7219(Addr_Digit0,max7219_7led_code[1]);<BR> wr_max7219(Addr_Digit1,max7219_7led_code[2]);<BR> wr_max7219(Addr_Digit2,max7219_7led_code[3]);<BR> wr_max7219(Addr_Digit3,max7219_7led_code[4]);<BR> wr_max7219(Addr_Digit4,max7219_7led_code[5]);<BR> wr_max7219(Addr_Digit5,max7219_7led_code[6]);<BR> wr_max7219(Addr_Digit6,max7219_7led_code[7]);<BR>
wr_max7219(Addr_Digit7,max7219_7led_code[8]);</P>
<P> P0=0x00;<BR> //
wr_max7219(Addr_Display_Test,0x01); //測試<BR>
while(1);<BR>}</P>
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