摘要：
要求：产生某种特定在波形 1 /*DA转换实验 例如产生锯齿波*/ 2 3 #include <reg52.h> 4 5 unsigned char xdata ad_cs0 _at_ 0xc000; 6 unsigned char xdata ad_cs1 _at_ 0xc001 ; 7 unsigned char xdata key_seg _at_ 0xd004; 8 unsigned char xdata key_bit _at_ 0xd002; 9 10 sbit EOC=P3^2;11 unsigned char disp_ram[6];12 unsig... 阅读全文
摘要：
1 /*电压表 精确到小数点后面三位*/ 2 /*连线：电位器接IN0，AD_CS接CS0,CS1接KEY/LED_CS*/ 3 #include<reg52.h> 4 typedef unsigned char uchar; 5 xdata uchar LED_CS _at_ 0x9000; 6 xdata uchar LED_OUTSEG _at_ 0x9004; 7 xdata uchar LED_OUTBIT _at_ 0x9002; 8 9 xdata uchar AD_CS _at_ 0x8000;10 xdata uchar AD_MODE _at_ 0x8003;1 阅读全文