#include "msp430g2553.h"
#include "1602.h"
#define uchar unsigned char
#define uint unsigned int
#define Num_of_Results 32
static uint results[Num_of_Results]; //保存ADC转换结果的数组 // is not used for anything.
void Trans_val(uint Hex_Val);
/***************************************
1602显示字符 和算法滤波的定义
*************************************/
uchar shuzi[] = {"0123456789."};
uchar tishi[] = {"The volt is:"};
/**************************************
主函数
***************************************/
int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
LCD_init(); //复位1602液晶
LCD_write_string(2,0,tishi); //显示提示信息
LCD_write_char(11,1,'V');
ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE; // ADC10ON, interrupt enabled
ADC10CTL1 = INCH_1; // input A1
ADC10AE0 |= 0x02; // PA.1 ADC option select
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
_EINT();
__bis_SR_register(CPUOFF + GIE); // Clear CPUOFF bit from 0(SR)
}
/*******************************************
函数名称：ADC12ISR
功 能：ADC中断服务函数，在这里用多次平均的
计算P6.0口的模拟电压数值
参 数：无
返回值 ：无
********************************************/
#pragma vector=ADC10_VECTOR
__interrupt void ADC10ISR (void)
{
static uint index = 0;
results[index++] = ADC10MEM; // Move results
if(index == Num_of_Results)
{
uchar i;
unsigned long sum = 0;
index = 0;
for(i = 0; i < Num_of_Results; i++)
{
sum += results[i];
}
sum >>= 5; //除以32 2的5次方=32
Trans_val(sum);
}
__bic_SR_register_on_exit(CPUOFF);
}
/*******************************************
函数名称：Trans_val
功 能：将16进制ADC转换数据变换成三位10进制
真实的模拟电压数据，并在液晶上显示
参 数：Hex_Val--16进制数据
n--变换时的分母等于2的n次方
返回值 ：无
********************************************/
void Trans_val(uint Hex_Val)
{
unsigned long caltmp;
uint Curr_Volt;
uchar t1,i;
uchar ptr[4];
caltmp = Hex_Val;
caltmp = (caltmp << 5) + Hex_Val; //caltmp = Hex_Val * 33
caltmp = (caltmp << 3) + (caltmp << 1); //caltmp = caltmp * 10
Curr_Volt = caltmp >> 12; //Curr_Volt = caltmp / 2^n
ptr[0] = Curr_Volt / 100; //Hex->Dec变换
t1 = Curr_Volt - (ptr[0] * 100);
ptr[2] = t1 / 10;
ptr[3] = t1 - (ptr[2] * 10);
ptr[1] = 10; //shuzi表中第10位对应符号"."
//在液晶上显示变换后的结果
for(i = 0;i < 4;i++)
LCD_write_char((6 + i),1,shuzi[ptr[i]]);
}
程序如上但是显示频没有显示 转换的数值
