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仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
![{CHFHZ(VUVBK5A6A`]RPE{G.png](http://c.51hei.com/d/forum/202005/23/175347gvc4cddycnnpskv4.png "{CHFHZ(VUVBK5A6A`]RPE{G.png")
![RH1SLBEYR(U]3}[5JXZGX.png](http://c.51hei.com/d/forum/202005/23/175356gca83l3e3c1tcxle.png "RH1SLBEYR(U]3}[5JXZGX.png")
單片機(jī)源程序如下:
- //******************************************************************//
- #include <MSP430x24x.h>
- #define uchar unsigned char
- #define uint unsigned int
- uchar const table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //共陰數(shù)碼管段選碼表，無(wú)小數(shù)點(diǎn)
- 0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
- uchar table_volt[4] = {0}; //數(shù)組，存儲(chǔ)電壓值
- uchar Index; //變量
- //*******延時(shí)函數(shù)************//
- void Delay_ms(unsigned int t)
- {
- unsigned int num;
- while(t--)
- for(num=1330;num>0;num--);
- }
- //ADC管腳定義
- #define ADCST0 P5OUT &= ~BIT4
- #define ADCST1 P5OUT |= BIT4
- #define ADCALE0 P5OUT &= ~BIT5
- #define ADCALE1 P5OUT |= BIT5
- #define ADCEOC0 P5OUT &= ~BIT6
- #define ADCEOC1 P5OUT |= BIT6
- #define ADCOE0 P5OUT &= ~BIT7
- #define ADCOE1 P5OUT |= BIT7
- #define ADC_Channel0 P5OUT &= ~BIT0
- #define ADC_Channel1 P5OUT |= BIT0
- unsigned int ADC1 = 0; //變量，采集電池電壓值
- //*******ADC采集啟動(dòng)函數(shù)************//
- void ADC_START(void)
- {
- ADCALE1;
- ADCST1;
- Delay_ms(1);
- ADCALE0;
- ADCST0;
- Delay_ms(1);
- }
- //*******ADC采集時(shí)序?qū)崿F(xiàn)函數(shù)************//
- unsigned int ADC_READ(void)
- {
- unsigned int data;
- data=0x00;
- Delay_ms(1);
- ADCOE1;
- ADC_START();
- Delay_ms(5);
- data=P4IN; //讀取數(shù)據(jù)
- ADCOE0;
- return data; //返回?cái)?shù)據(jù)
- }
- //*******主函數(shù)************//
- void main(void)
- {
-
- WDTCTL=WDTPW + WDTHOLD; // 關(guān)閉看門(mén)狗
- P2DIR=0xFF; // 設(shè)置方向
- P2SEL=0; // 設(shè)置為普通I/O 口
-
- P3DIR=0xFF; // 設(shè)置方向
- P3SEL=0; // 設(shè)置為普通I/O 口
-
- P2OUT=0x00;
- P3OUT=0xFF;
-
- P5SEL = 0x00;
- P5DIR |= BIT0+BIT4+BIT5+BIT6; //ADC芯片接口
-
-
-
- while(1)
- {
-
- P3OUT=0xFF;
- if( Index == 0 ) //如果第一個(gè)數(shù)碼管顯示，加入小數(shù)點(diǎn)
- {
- P2OUT=table[table_volt[Index]]+0x80;//小數(shù)點(diǎn)
- }
- else //其他不加
- {
- P2OUT=table[table_volt[Index]]; //顯示電壓值
- }
- P3OUT=~(1<<Index);
- if(++Index==4) Index=0;
- Delay_ms(1); //延時(shí)
-
- ADC1 = ADC_READ()*20-80; //ADC電池電壓采集，放大
- table_volt[0] = ADC1/1000; //千位
- table_volt[1] = ADC1%1000/100; //百位
- table_volt[2] = ADC1%100/10; //十位
- table_volt[3] = ADC1%10; //個(gè)位
-
- }
-
- }
所有資料51hei提供下載:
代碼.rar
(313.3 KB, 下載次數(shù): 66)
2020-5-23 17:53 上傳
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仿真圖.rar
(181.78 KB, 下載次數(shù): 56)
2020-5-23 17:53 上傳
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