基于msp430g2553单片机ADC测量外部直流电压

1、#include <msp430g2553 、 h> #define uchar unsigned char#defineuintunsigned int#defineLCDCON_DIR P2DIR#defineLCDCON_IN P2IN#defineLCDCON_OUT P2OUT#defineLCDRSBIT0/p2、5接 51 p2 、5#defineLCDRWBIT1/p2、0接 51 p2 、6#defineLCDENBIT2/p2、1接 51 p2 、7#define LCD_DATA_DIR P1DIR#define LCD_DATA_IN P1IN#define

2、 LCD_DATA_OUT P1OUT #define A 1000#define B 100#define X 10 void InitOsc ( void );void InitLCD ( void );void write_command (uchar command);void write_data (uchar data);void Display_ZFC (uchar *s);void LCD_Set_xy (uchar x,uchar y);void Trans_val (uint Hex_Val);void Display_Volte (uint Hex_Val);void M

3、easure_Volte ( void );uchar num= "0123456789 、 v" ;uchar volte= "Volt: " ;uint index=0;int i;unsigned long sum=0;uint Hex_Val;#define Num_of_Results 32uint resultsNum_of_Results;/ 保存 ADC转换结果的数组uint average;/*ADC初始化*/void ADC_Init ( void )ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE

4、;/ ADC10ON, interrupt enabledADC10CTL1 = INCH_1;/ input A1ADC10AE0 |= 0x02;/二次采集DCO时钟初始化 设为1MHz* void DCO_lnit (void )if (CALBC1_1MHZ=0xFF|CALDCO_1MHZ=0xFF)while (1);BCSCTL1 = CALBC1_1MHZ;DCOCTL = CALDCO_1MHZ;BCSCTL2 = SELM_0 +DIVM_0;向12864发送字节*void SendByte (uchar Zdata)uint i;for (i=0; i<8; i+)

5、if (Zdata << i) & 0x80)/clk始终信号为高LCD_CON_OUT |= LCD_RW;else/clk始终信号为低LCD_CON_OUT &=LCD_RW;LCD_CON_OUT &=LCD_EN;LCD_CON_OUT |= LCD_EN;向12864写命令*void write_command (uchar command)LCD_CON_OUT |= LCD_RS;SendByte(0xF8); SendByte(command & 0xF0); SendByte(command<<4)&0xF0);

6、 _delay_cycles(200); /*向12864 写数据*/ void write_data (uchar data)LCD_CON_OUT |= LCD_RS;SendByte(0xFA);SendByte(data & 0xF0);SendByte(data << 4) & 0xF0);_delay_cycles(200);void Display_ZFC (uchar *s)while (*s > 0)write_data(*s);s+;_delay_cycles(5000);/* 确定 12864 屏幕显示的坐标位置 (x,y) */ voi

7、d LCD_Set_xy ( uchar x, uchar y )uchar address;switch (x)case0: address = 0x80 + y;breakcase1: address = 0x80 + y;breakcase2: address = 0x90 + y;breakcase3: address = 0x88 + y;breakcase4: address = 0x98 + y;breakdefault :address = 0x80 + y;break ;/ 写入地址命令write_command(address);led初始化*/void InitLCD (

8、void )LCD_CON_DIR |= OxFF;p2 口定义为输出write_command(0x01);/ 清屏write_command(0x30);_delay_cycles(5000);write_command(0x0c);_delay_cycles(5000);/*采集到的数据转化成电压形式*/void Trans_val (uint Hex_Val)unsigned long caltmp;uint Curr_Volt,volt,max;uint a50;caltmp = Hex_Val;caltmp = caltmp*34600;/caltmp = Hex Val * 34

9、600Curr_Volt = caltmp >> 10 ;Curr_Volt = caltmp / 2Anvolt = Curr_Volt;for (i=0;i<50;i+)ai=volt;for (max=a0,i=0;i<50;i+) if (ai>max)max=ai;Curr_Volt = max;Display_Volte(Curr_Volt);/*主函数*/void main ( void )WDTCTL = WDTPW + WDTHOLD;ADC_Init();/ADC 初始化DCO_Init();/DCO 初始化InitLCD();/12864 液

10、晶初始化while (1)Measure_Volte();/测量直流电压值并且显示测量电压*void Measure_Volte ( void )ADC10CTL0 |= ENC + ADC10SC;_bis_SR_register(CPUOFF + GIE); resultsindex+ = ADC10MEM;if (index = Num_of_Results)index = 0;for (i = 0; i < Num_of_Results; i+)sum += resultsi; sum >>= 5; Trans_val(sum); sum=0;/ Sampling a

11、nd conversion start/ Move results/ 除以 32显示电压值* void Display_Volte (uint Hex_Val)uint Curr_Volt;Curr_Volt = Hex_Val; write_command(0x90);for (i=0;i<16;i+) write_data(voltei); write_command(0x93);write_data(numCurr_Volt / 10000); write_data(num10);write_data(numCurr_Volt % 10000/1000); write_data(numCurr_Volt % 10000 % 1000 / 100); write_data(numCurr_Volt % 10000 % 1000 % 100 / 10); write_data( &#