基于msp430g2553单片机ADC测量外部直流电压

1、#include#define uchar unsigned char#define uint unsigned int#define lcd_con_dir p2dir#define lcd_con_in p2in#define lcd_con_out p2out#define lcd_rs bit0 /p2.5接51 p2.5#define lcd_rw bit1 /p2.0接51 p2.6#define lcd_en bit2 /p2.1接51 p2.7#define lcd_data_dir p1dir#define lcd_data_in p1in#define lcd_data_o

2、ut p1out#define a 1000#define b 100#define x 10void initosc(void);void initlcd(void);void write_command(uchar command);void write_data(uchar data);void display_zfc(uchar *s);void lcd_set_xy(uchar x,uchar y);void trans_val(uint hex_val);void display_volte(uint hex_val);void measure_volte(void);uchar

3、num=0123456789.v;uchar volte=volt: ;uint index=0;int i;unsigned long sum=0;uint hex_val;#define num_of_results 32uint resultsnum_of_results; /保存adc转换结果的数组uint average;/* adc初始化*/void adc_init(void) adc10ctl0 = adc10sht_2 + adc10on + adc10ie; / adc10on, interrupt enabled adc10ctl1 = inch_1; / input a

4、1 adc10ae0 |= 0x02; /二次采集/* dco时钟初始化 设为1mhz*/void dco_init(void)if(calbc1_1mhz=0xff|caldco_1mhz=0xff)while(1);bcsctl1 = calbc1_1mhz;dcoctl = caldco_1mhz; bcsctl2 = selm_0 +divm_0;/* 向12864发送字节*/void sendbyte(uchar zdata)uint i;for(i=0; i8; i+)if(zdata i) & 0x80)lcd_con_out |= lcd_rw; /clk始终信号为高elsel

5、cd_con_out &=lcd_rw; /clk始终信号为低lcd_con_out &= lcd_en;lcd_con_out |= lcd_en;/* 向12864写命令*/void write_command(uchar command)lcd_con_out |= lcd_rs;sendbyte(0xf8);sendbyte(command & 0xf0);sendbyte(command4)&0xf0);_delay_cycles(200);/* 向12864写数据*/void write_data(uchar data)lcd_con_out |= lcd_rs;sendbyte(

6、0xfa);sendbyte(data & 0xf0);sendbyte(data 0) write_data(*s);s+;_delay_cycles(5000); /* 确定12864屏幕显示的坐标位置（x,y）*/void lcd_set_xy( uchar x, uchar y ) uchar address;switch(x)case 0: address = 0x80 + y; break; case 1: address = 0x80 + y; break;case 2: address = 0x90 + y; break; case 3: address = 0x88 + y;

7、 break;case 4: address = 0x98 + y; break;default:address = 0x80 + y; break; write_command(address); /写入地址命令/* lcd初始化*/void initlcd(void)lcd_con_dir |= 0xff; /p2口定义为输出write_command(0x01); /清屏write_command(0x30);_delay_cycles(5000);write_command(0x0c);_delay_cycles(5000);/* 采集到的数据转化成电压形式*/void trans_v

8、al(uint hex_val)unsigned long caltmp;uint curr_volt,volt,max;uint a50;caltmp = hex_val; caltmp = caltmp*34600; /caltmp = hex_val * 34600 curr_volt = caltmp 10 ; /curr_volt = caltmp / 2n volt = curr_volt; for(i=0;i50;i+) ai=volt; for(max=a0,i=0;imax)max=ai; curr_volt = max; display_volte(curr_volt);/

9、* 主函数*/void main(void)wdtctl = wdtpw + wdthold;adc_init(); /adc初始化dco_init(); /dco初始化initlcd(); /12864液晶初始化while(1)measure_volte(); /测量直流电压值并且显示/* 测量电压*/void measure_volte(void) adc10ctl0 |= enc + adc10sc; / sampling and conversion start _bis_sr_register(cpuoff + gie); resultsindex+ = adc10mem; / mo

10、ve results if(index = num_of_results) index = 0; for(i = 0; i = 5; /除以32 trans_val(sum); sum=0; /* 显示电压值*/void display_volte(uint hex_val)uint curr_volt;curr_volt = hex_val;write_command(0x90);for(i=0;i16;i+)write_data(voltei);write_command(0x93);write_data(numcurr_volt / 10000);write_data(num10);write_data(numcurr_volt % 10000/1000);write_data(numcurr_volt % 10000 % 1000 / 100);write_data(numcurr_volt % 10000 % 1000 % 100 / 10);write_data( );w