如何用MSP430实现AD转换，并显示到1602上？求程序

2015-10-10 13:29:04 3775 AD转换

1 如何用MSP430实现AD转换，并显示到1602上？求程序 2
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1 /******************************************************* 程序功能：MCU的片内ADC对P6.0端口的电压进行转换将模拟电压值显示在1602液晶上。 ---------------------------------------------------------- 测试说明：调节电位器W1的旋钮观察液晶显示数字变化。 *****************************************************/ #include #include "cry1602.h" #include "cry1602.c" //typedef unsigned char uchar; //typedef unsigned int uint; #define Num_of_Results 32 uchar shuzi[] = {"0123456789."}; uchar tishi[] = {"The volts are:"}; static uint results1[Num_of_Results]; //保存ADC转换结果的数组 // is not used for anything. static uint results2[Num_of_Results]; void Trans_val1(uint Hex_Val); void Trans_val2(uint Hex_Val); /********************主函数*************************/ void main(void) { WDTCTL = WDTPW+WDTHOLD; //关闭看门狗 /下面六行程序关闭所有的IO口/ P1DIR = 0XFF;P1OUT = 0XFF; P2DIR = 0XFF;P2OUT = 0XFF; P3DIR = 0XFF;P3OUT = 0XFF; P4DIR = 0XFF;P4OUT = 0XFF; P5DIR = 0XFF;P5OUT = 0XFF; P6DIR = 0XFF;P6OUT = 0XFF; P6DIR \|= BIT2;P6OUT \|= BIT2; //关闭电平转换 P5DIR\|=BIT5;P5OUT&=~BIT5; //关闭数码管显示 P6DIR\|=BIT6;P6OUT&=~BIT6; //半闭数码管显示 P6DIR\|=BIT5;P6OUT&=~BIT5; //半闭数码管显示 LcdReset(); //复位1602液晶 DispNChar(0,0,14,tishi); //显示提示信息 Disp1Char(0,1,'A'); Disp1Char(1,1,':'); Disp1Char(6,1,'V'); //显示电压单位 Disp1Char(9,1,'B'); Disp1Char(10,1,':'); Disp1Char(15,1,'V'); //显示电压单位 P6SEL \|= 0x03; // 使能ADC通道 ADC12CTL0 = ADC12ON+SHT0_8+MSC; // 打开ADC，设置采样时间 ADC12CTL1 = SHP+CONSEQ_3; // 使用采样定时器 ADC12 Conversion Sequence Select: 3- Repeat-sequence-of-channels ADC12MCTL0 = INCH_0; / ADC12 Input Channel 0 / ADC12MCTL1 = INCH_1+EOS; / ADC12 Input Channel 1 / //EOS- End of sequence. Indicates the last conversion in a sequence. ADC12IE = 0x02; // 使能ADC中断 ADC12CTL0 \|= ENC; // 使能转换 ADC12CTL0 \|= ADC12SC; // 开始转换 _EINT(); LPM0; } /**************************************** 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=ADC_VECTOR __interrupt void ADC12ISR (void) { static uint index1 = 0; static uint index2 = 0; results1[index1++] = ADC12MEM0; // Move results if(index1 == Num_of_Results) { uchar i; unsigned long sum1 = 0; index1 = 0; for(i = 0; i < Num_of_Results; i++) { sum1+= results1[i]; } sum1 >>= 5; //除以32 Trans_val1(sum1); } results2[index2++] = ADC12MEM1; // Move results if(index2 == Num_of_Results) { uchar i; unsigned long sum2 = 0; index2 = 0; for(i = 0; i < Num_of_Results; i++) { sum2 += results2[i]; } sum2 >>= 5; //除以32 Trans_val2(sum2); } } /*************************************** 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_val1(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 将参考电压放大100倍，既330输出的值为采的值乘以330除以4096除以100 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++) Disp1Char(2+i,1,shuzi[ptr[i]]); } void Trans_val2(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 将参考电压放大100倍，既330输出的值为采的值乘以330除以4096除以100 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++) Disp1Char((11 + i),1,shuzi[ptr[i]]); }

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