本程序所用的原理图下载: 点这里 ，单片机芯片使用的stc89c52；找到相应部分即可.这是一整个单片机的电路图其他的忽略. hex文件及其工程文件下载：http://www.51hei.com/f/juzhen.rar 以下是通过测试的源代码： /* *功能：使用矩阵按键使得按键按下时上显示各自对应的数字（0 ~ F）； *日期：2013-05-03-17:51; *作者：徐冉 *特别说明：本程序代码已经通过调试，仅供学习使用； * */ /***********AT89C52-RC 单片机51hei 实验板***********/ /*****************51hei-开发板*********************/ #include <reg52.h> typedef unsigned int uint; typedef unsigned char uchar; sbit wela = P2^7; sbit dula = P2^6; sbit FM = P2^3; uchar code table[] = { 0x3F, //"0" 0x06, //"1" 0x5B, //"2" 0x4F, //"3" 0x66, //"4" 0x6D, //"5" 0x7D, //"6" 0x07, //"7" 0x7F, //"8" 0x6F, //"9" 0x77, //"A" 0x7C, //"B" 0x39, //"C" 0x5E, //"D" 0x79, //"E" 0x71, //"F" 0x76, //"H" 0x38, //"L" 0x37, //"n" 0x3E, //"u" 0x73, //"P" 0x5C, //"o" 0x40, //"-" 0x00, //熄灭 0x00 //自定义 }; uchar key, temp; void display(uchar num); void Marix_keyscan(); void delay(uint xms); void main() { dula = 1; P0 = 0x00; dula = 0; wela = 1; P0 = 0xea; wela = 0; while(1) { Marix_keyscan(); display(key); } } void display(uchar num) { dula = 1; P0 = table[num]; dula = 0; } void delay(uint xms) { uint i, j; for(i = xms; i > 0; i--) for(j = 125; j > 0; j--); } void Marix_keyscan() { P3 = 0xfe; temp = P3; temp &= 0xf0; if(temp != 0xf0) { delay(5); temp = P3; temp &= 0xf0; if(temp != 0xf0) { FM = 0; temp = P3; switch(temp) { case 0xee: key = 0; break; case 0xde: key = 1; break; case 0xbe: key = 2; break; case 0x7e: key = 3; break; default: break; } while(temp != 0xf0) { temp = P3; temp &= 0xf0; } delay(5); while(temp != 0xf0) { temp = P3; temp &= 0xf0; } FM = 1; } } P3 = 0xfd; temp = P3; temp &= 0xf0; if(temp != 0xf0) { delay(5); temp = P3; temp &= 0xf0; if(temp != 0xf0) { FM = 0; temp = P3; switch(temp) { case 0xed:key = 4; break; case 0xdd:key = 5; break; case 0xbd:key = 6; break; case 0x7d:key = 7; break; default: break; } while(temp != 0xf0) { temp = P3; temp &= 0xf0; } delay(5); while(temp != 0xf0) { temp = P3; temp &= 0xf0; } FM = 1; } } P3 = 0xfb; temp = P3; temp &= 0xf0; if(temp != 0xf0) { delay(5); temp = P3; temp &= 0xf0; if(temp != 0xf0) { FM = 0; temp = P3; switch(temp) { case 0xeb: key = 8; break; case 0xdb: key = 9; break; case 0xbb: key = 10; break; case 0x7b: key = 11; break; default: break; } while(temp != 0xf0) { temp = P3; temp &= 0xf0; } delay(5); while(temp != 0xf0) { temp = P3; temp &= 0xf0; } FM = 1; } } P3 = 0xf7; temp = P3; temp &= 0xf0; if(temp != 0xf0) { delay(5); temp = P3; temp &= 0xf0; if(temp != 0xf0) { FM = 0; temp = P3; switch(temp) { case 0xe7: key = 12; break; case 0xd7: key = 13; break; case 0xb7: key = 14; break; case 0x77: key = 15; break; default: break; } while(temp != 0xf0) { temp = P3; temp &= 0xf0; } delay(5); while(temp != 0xf0) { temp = P3; temp &= 0xf0; } FM = 1; } } }
-电子元器件采购网（www.ruidan.com）是本土元器件目录分销商，采用“小批量、现货、样品”销售模式，致力于满足客户多型号、高质量、快速交付的采购需求。 自建高效智能仓储，拥有自营库存超过50,000种，提供一站式正品现货采购、个性化解决方案、选型替代等多元化服务。