【正文】 column=1。 if(++row==3) return。 else { switch(row)//這種結(jié)構(gòu)保持以后升級(jí)到多行顯示液晶 { case 1:Lcd1602_Write_Command(0x80)。break。 case 2:Lcd1602_Write_Command(0x80+0x40)。break。//重新調(diào)整數(shù)據(jù)地址指針 default:break。 } } } } }void Lcd1602_Write_char(unsigned char i){ if(i==0)return。 switch(row) //這種結(jié)構(gòu)保持以后升級(jí)到多行顯示液晶 { case 1:Lcd1602_Write_Command(0x80+column1)。break。 //將數(shù)據(jù)地址指針定位到第一行 case 2:Lcd1602_Write_Command(0x80+0x40+column1)。break。 //將數(shù)據(jù)地址指針定位到第二行 default:break。 } Lcd1602_Write_Data(i)。 if(++column==17) { column=1。 if(++row==3) row=1。 }}void delay(uchar t1,t2){ uchar i,j。 for(i=0。it1。i++) for(j=0。jt2。j++)。 }//==========================================//清除指定的行，光標(biāo)返回最左邊第一個(gè)字符位置//==========================================void Lcd1602_Clear_Line(unsigned char line){ Lcd1602_Write_String(line,1, )。 switch(line)// 將數(shù)據(jù)地址指針返回到起始位置 這種結(jié)構(gòu)保持以后升級(jí)到多行顯示液晶 { case 1:Lcd1602_Write_Command(0x80)。break。 //將數(shù)據(jù)地址指針定位到第一行 case 2:Lcd1602_Write_Command(0x80+0x40)。break。 //將數(shù)據(jù)地址指針定位到第二行 default: break。 } } /*void Dis_decode_data(uint decode_data ){ uchar k[5],i。 k[0]=(uchar)(decode_data/10000)。 k[1]=(uchar)((decode_datak[0]*10000)/1000)。 k[2]=(uchar)((decode_datak[0]*10000k[1]*1000)/100)。 k[3]=(uchar)((decode_datak[0]*10000k[1]*1000k[2]*100)/10)。 k[4]=(uchar)((decode_datak[0]*10000k[1]*1000k[2]*100)k[3]*10/1)。 for(i=0。i5。i++) { Lcd1602_Write_char(k[i]+39。039。)。} } *//*void Lcd1602_Clear_All(void){ Lcd1602_Write_Command(0x01)。//顯示清屏。 Lcd1602_Write_Command(0x80)。//將數(shù)據(jù)指針設(shè)置到第一行的第一個(gè)字符。}//==================================================//清除指定的位置的字符，光標(biāo)返回最左邊第一個(gè)字符位置//==================================================void Lcd1602_Clear_Char(unsigned char row,unsigned char column){ Lcd1602_Write_String(row,column,)。} */include define uchar unsigned chardefine uint unsigned int//// Adress Set//define Data_Port P0 // P5作為數(shù)據(jù)通信口//define Contro_Port P4 // P4作為控制端口時(shí),只取02, sbit RS = P3^0。sbit RW = P3^1。sbit E = P3^5。//// Mode Set//uchar column=1,row=1。//// Function PROTOTYPES////void Dis_decode_data(uint decode_data )。void Lcd1602_Ini(void)。 //初始化void Lcd1602_Check_Busy(void)。void Lcd1602_Write_Command(unsigned char Command_Code) reentrant。 // 為了解決可重入函數(shù)，需加上reentrantvoid Lcd1602_Write_Data(unsigned char Data) 。void Lcd1602_Write_char(unsigned char i)。void Lcd1602_Write_String(unsigned char row,unsigned char column,unsigned char *dis_buffer) reentrant 。//void Lcd1602_Clear_Char(unsigned char row,unsigned char column)。void Lcd1602_Clear_Line(unsigned char line)。//void Lcd1602_Clear_All(void)。void delay(uchar t1,t2)。Power quality problems and solutions summarySummary: voltage electricity grid is too large changes inadequate electricity supply sector to take relief, or in remote areas, excessive wear and tear, leading to low voltage. Too little electricity grid, leading to voltage High voltage low load can not be normal, high voltage, load life shortened, or load burning. Keywords: power 1. Changes in the scope of excessive voltage electricity grid inadequate electricity supply sector to take relief, or in remote areas, excessive wear and tear, leading to low voltage. Too little electricity grid, leading to voltage High voltage low load can not be normal, high voltage, load life shortened, or load burning. 2. Waveform distortions (or called Waveform Distortion) universal waveform distortions that standard power waveform multiple harmonics. Grid harmonics generated because regulators, ups power supply, electronic equipment mechanics, pact systems, puters, microwave ovens, energy saving lights, dimmers on the electronic equipment and electrical equipment such as electric power, switching to the use or own a second power itself. The main hazards to the public grid resolved include: 1) To enable the public grid ponents have additional harmonics depletion and reducing power generation, power transmission equipment efficiency, a large number of 3rd harmonics flowing neutral line, the lines will cause overheating and even fire。 2) Impact of the normal work of electrical equipment, in addition to causing additional wear and tear, but also to generate electrical machinery vibration, noise and overvoltage, transformers partial serious overheating, condenser, cables and other equipment overheating, insulation aging, life expectancy, resulting in damage。 3) Will cause local utility grid and parallel connection tubes contacted tubes, thereby resolved enlarged so that the aforementioned hazards greatly increased, and even cause serious accidents。 4) Will lead to automatic protective devices and mistakenly moves, and the measurement of electrical measuring instruments inaccurate。 5) Will have a nearby munications systems of interference, the noise generated light of lower quality munications, information leading to the loss of heavy to normal munications systems. 3. Power Surges means in the instant (a few milliseconds) export voltage valid value 110% higher than the rated value, the duration of one or several cycles. Sophisticated elect