基于MSP430G2553实现交流电压表

//***************************************************************************** *
// LaunchPad Lab5 - ADC10, Sample A10 Temp and Convert to oC and oF
//
// MSP430G2452
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// |A10 |
//幅值测量范围，7hz 以上的正弦波
//***************************************************************************** *
#include "msp430g2553.h"
long temp;
long peak;
long IntDegC;
long IntDegF;
long count;
long counta;
long IntDegV;
/////////////////////////////////////////////////
#define CPU_F ((double)1000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
unsigned char position[4]={0xfe,0xfd,0xfb,0xf7};
unsigned char dis_buff[4];
//unsigned char time[3]={0}; // 分、秒计数单元和积分单元unsigned char posit = 0;
unsigned char disp[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; //共yang显示顺时针
//unsigned char disp[] = {0x3f,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; //共yin显示顺时针
#define clr_595_1 P1OUT |= BIT6
#define clr_595_0 P1OUT &=~BIT6
#define clk_595_1 P1OUT |= BIT7
#define clk_595_0 P1OUT &=~BIT7
#define cp_595_1 P1OUT |= BIT4
#define cp_595_0 P1OUT &=~BIT4
#define di_595_1 P1OUT |= BIT5
#define di_595_0 P1OUT &=~BIT5
void show_595(unsigned char c)//595显示
{
int w,x;
unsigned char num;
clr_595_1;
num=disp[c];
for(w=0;w<8;w++)
{
clk_595_0;
x=num&0x80;
if(x==0)
{
di_595_0;
}
else
{
di_595_1;
}
delay_us(2);
num=num<<1;
clk_595_1;
}
cp_595_0;
delay_us(2);
cp_595_1;
}
void display(void) // 2位LED数码管动态扫描函数
{
show_595(dis_buff[posit]);
P2OUT=position[posit]; //p1out
if(++posit>=4)
posit=0;
}
void time_to_disbuffer(void) // 时钟时间送显示缓冲区函数{
unsigned char j=0;
dis_buff[j++] = (unsigned char)((IntDegF%100) % 10);
dis_buff[j++] = (unsigned char)((IntDegF%100) /10);
dis_buff[j++] = (unsigned char)((IntDegF/100) % 10);
dis_buff[j++] = (unsigned char)((IntDegF/100) / 10);
//dis_buff[j++] = time[1] % 10;
//dis_buff[j++] = time[2] % 10;
}
//////////////////////////////////////////////////////////
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT(关闭电子狗)
ADC10CTL1 = INCH_2 + ADC10DIV_1 + CONSEQ_2 ; // Choose ADC Channel as Temp Sensor
ADC10CTL0 = SREF_1+ ADC10SHT_1 + REF2_5V + REFON + ADC10ON + MSC;
//Choose ADC Ref source
ADC10AE0 |= BIT2;
P1DIR = 0xFB;
P2DIR = 0xFF;
P1SEL = 0x04;
count = 0;
peak = 0;
IntDegF = 0;
IntDegC = 0;
counta = 0;
IntDegV = 0;
while(1)
{
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
temp = ADC10MEM;
IntDegC = (int)(((float)temp / 1023) * 2500);
if(peak<IntDegC)
peak=IntDegC;
count++;
if(count==200)
{
counta++;
count=0;
// IntDegF = peak;
IntDegV += peak;
peak=0;
// IntDegF=2345;
// time_to_disbuffer();
// display();
}
if(counta == 10)
{
counta = 0;
IntDegF = IntDegV / 10;
time_to_disbuffer();
IntDegV = 0;
}
// time_to_disbuffer();
display();
}
}。