STC12C5A60SAD转换及LCD1602显示.doc

/*我写的51AD转换程序，LED灯显示，随着外部电压升高，亮的小灯数会逐渐增加*/#include/包含单片机寄存器的头文件#include /包含_nop_()函数定义的头文件unsigned char result; /A/D转换结果变量 void main(void)unsigned long i;unsigned char status;ADC_CONTR|=0x80; /开A/D转换电源,第一次使用时要打开内部模拟电源for (i=0;i10000;i+); /适当延时P1ASF=0x04;/选择P1.2作为A/D转换通道ADC_CONTR=0xE2; for (i=0;i10000;i+); /适当延时while(1) /循环进行A/D 转换ADC_CONTR|=0x08; /启动 A/D 转换status=0;while(status=0) /等待A/D转换结束 status=ADC_CONTR&0x10;ADC_CONTR&=0xE7; /将ADC_FLAG清0result=ADC_RES; /保存A/D转换结果if(result32)P0=0xff;else if(result64)P0=0xfe;else if(result96)P0=0xfc;else if(result128)P0=0xf8;else if(result160)P0=0xf0;else if(result192)P0=0xe0;else if(result214)P0=0xc0;else if(result236)P0=0x80;else P0=0x00;/*-*/ /*-*功能【AD转换，液晶显示】*-*/*-*芯片：【STC12C5A60S2】*-*/*-*液晶：【LCD1602】*-*/*-*ADC管脚：【P1.0P1.7 】*-*/*-*检测范围：【0.004.99V】*-*/*-*/ #include reg52.h #include intrins.h typedef unsigned char uchar; typedef unsigned int uint; #define _Nop() _nop_()/*-以下为LCD1602显示模块定义-*/unsigned char data_char_table= 0123456789ABCDEF;/LCD数据unsigned char Lcd_Dis1_table = Position:No. ;/第一行显示框架unsigned char pos_char_table = D ;/ 显示位置unsigned char Lcd_Dis2_table = Voltage : V;/第二行显示框架unsigned char num_char_table = 9A.CD V;/ 显示位置sbit lcd_rs_port = P27; /定义LCD控制端口,根据硬件调整sbit lcd_rw_port = P26;sbit lcd_en_port = P24;#define lcd_data_port P0void lcd_delay(uchar ms);/LCD1602 延时void lcd_busy_wait(); /LCD1602 忙等待void lcd_command_write(uint command); /LCD1602 命令字写入void lcd_system_reset();/LCD1602 初始化void lcd_char_write(uint x_pos,y_pos,lcd_dat); /LCD1602 字符写入void lcd_bad_check(); /LCD1602 坏点检查void Num_to_Disp(uchar i, uint Num);/显示数据处理void LcdDisp(uchar j, uint num);/液晶显示函数/*-以下为ADC相应寄存器初始化及端口定义-*/ /* 定义与ADC相关的特殊功能寄存器 */ sfr ADC_CONTR = 0xBC; /ADC控制寄存器 sfr ADC_RES = 0xBD; /ADC hight 8-bit result register sfr ADC_RESL = 0xBE; /ADC low 2-bit result register sfr P1ASF = 0x9D; /P1口功能控制寄存器P1ASF/*定义相应操作位*/ #define ADC_POWER 0x80 /ADC电源控制位，0：关闭，1：打开#define ADC_FLAG 0x10 /ADC结束标志位#define ADC_START 0x08 /ADC启动控制位 #define ADC_SPEEDLL 0x00 /540 clocks_选择转换速度/*-以下为相关函数声明-*/ void InitADC();/ADC初始化uint GetADCResult(uchar ch); void Delay(uint n); /延时程序void delay_1ms(uchar x);/*- 主函数 -*/ void main() uchar i;lcd_system_reset(); /LCD1602 初始化lcd_bad_check(); /LCD1602 坏点检查 InitADC(); /初始化ADC特殊功能寄存器 while (1) i = 0;while(i 7) LcdDisp(i, GetADCResult(i); /液晶1602显示输入电压值（P1.0 - P1.7）Delay(1000);i+; /*- ADC 取值 -*/ uint GetADCResult(uchar ch) ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START; _nop_(); /Must wait before inquiry _nop_(); _nop_(); _nop_(); while (!(ADC_CONTR & ADC_FLAG); /Wait complete flag ADC_CONTR &= ADC_FLAG; /Close ADC return (ADC_RES*4 + ADC_RESL); /Return ADC result /*- 初始化ADC特殊功能寄存器 -*/ void InitADC( ) P1ASF = P1 | 0x3f; /Set P1.0 - P1.5 as analog input port ADC_RES = 0; /Clear previous result ADC_RESL = 0; ADC_CONTR = ADC_POWER | ADC_SPEEDLL ; Delay(20); /ADC power-on delay and Start A/D conversion /*- LCD1602相应函数 -*/ /以下为LCD显示数据处理/void Num_to_Disp(uchar i, uint Num)float NUM;int xx, yy, zz;NUM = (Num * 5/ 1024.0);/计算公式：10-bit A/D Conversion Result = 1024 x (Vin / Vcc)xx = (int)NUM;yy = (int)(NUM - (float)(xx) * 10);zz = (int)(NUM - (float)(xx) * 100)%10; num_char_table9 = data_char_tablexx / 10;/电压值十位num_char_table10= data_char_tablexx % 10;/电压值个位num_char_table12= data_char_tableyy;/电压值小数点后一位num_char_table13= data_char_tablezz;/电压值小数点后两位?pos_char_table13= data_char_tablei;/当前ADC接口/以下为LCD显示/void LcdDisp(uchar j, uint num)uint i=0;for (i=0;i16;i+) lcd_char_write(i,0,Lcd_Dis1_tablei);lcd_char_write(i,1,Lcd_Dis2_tablei); /显示框架 Num_to_Disp(j, num);lcd_char_write(13,0,pos_char_table13);for(i = 9; i 14; i+)lcd_char_write(i,1,num_char_tablei); /显示电压 delay_1ms(100);/以下是LCD1602驱动程序/void lcd_delay(uchar ms) /*LCD1602 延时*/ uchar j; while(ms-) for(j=0;j250;j+) ; void lcd_busy_wait() /*LCD1602 忙等待*/ lcd_rs_port = 0; lcd_rw_port = 1; lcd_en_port = 1; lcd_data_port = 0xff; while (lcd_data_port&0x80); lcd_en_port = 0; void lcd_command_write(uint command) /*LCD1602 命令字写入*/ lcd_busy_wait(); lcd_rs_port = 0; lcd_rw_port = 0; lcd_en_port = 0; lcd_data_port = command; lcd_en_port = 1; lcd_en_port = 0; void lcd_system_reset() /*LCD1602 初始化*/ lcd_delay(20); lcd_command_write(0x38); lcd_delay(100); lcd_command_write(0x38); lcd_delay(50); lcd_command_write(0x38); lcd_delay(10); lcd_command_write(0x08); lcd_command_write(0x01); lcd_command_write(0x06); lcd_command_write(0x0c); void lcd_char_write(uint x_pos,y_pos,lcd_dat) /*LCD1602 字符写入*/ x_pos &= 0x0f; /* X位置范围 015 */ y_pos &= 0x01; /* Y位置范围 0 1 */ if(y_pos=1) x_pos += 0x40; x_pos += 0x80; lcd_command_write(x_pos); lcd_busy_wait(); lcd_rs_port = 1; lcd_rw_port = 0; lcd_en_port = 0; lcd_data_port = lcd_dat; lcd_en_port = 1; lcd_en_port = 0; void lcd_bad_check() /*LCD1602 坏点检查*/ char i,j; for(i=0;i2;i+) for(j=0;j16;j+) lcd_char_write(j,i,0xff); lcd_delay(200); lcd_delay(200);