MSP430电池电压采集仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）
单片机源程序如下:
- #include <MSP430x24x.h>
- #define uchar unsigned char
- #define uint unsigned int
- uchar const table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //共阴数码管段选码表，无小数点
- 0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
- uchar table_volt[4] = {0}; //数组，存储电压值
- uchar Index; //变量
- //*******延时函数************//
- void Delay_ms(unsigned int t)
- {
- unsigned int num;
- while(t--)
- for(num=1330;num>0;num--);
- }
- //ADC管脚定义
- #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; //变量，采集电池电压值
- //*******ADC采集启动函数************//
- void ADC_START(void)
- {
- ADCALE1;
- ADCST1;
- Delay_ms(1);
- ADCALE0;
- ADCST0;
- Delay_ms(1);
- }
- //*******ADC采集时序实现函数************//
- unsigned int ADC_READ(void)
- {
- unsigned int data;
- data=0x00;
- Delay_ms(1);
- ADCOE1;
- ADC_START();
- Delay_ms(5);
- data=P4IN; //读取数据
- ADCOE0;
- return data; //返回数据
- }
- //*******主函数************//
- void main(void)
- {
-
- WDTCTL=WDTPW + WDTHOLD; // 关闭看门狗
- P2DIR=0xFF; // 设置方向
- P2SEL=0; // 设置为普通I/O 口
-
- P3DIR=0xFF; // 设置方向
- P3SEL=0; // 设置为普通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 ) //如果第一个数码管显示，加入小数点
- {
- P2OUT=table[table_volt[Index]]+0x80;//小数点
- }
- else //其他不加
- {
- P2OUT=table[table_volt[Index]]; //显示电压值
- }
- P3OUT=~(1<<Index);
- if(++Index==4) Index=0;
- Delay_ms(1); //延时
-
- ADC1 = ADC_READ()*20-80; //ADC电池电压采集，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; //个位
-
- }
-
- }
所有资料51hei提供下载:
电池电压检测仿真.zip
(439.18 KB, 下载次数: 47)
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