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#include "msp430x24x.h"
#define set_rs P1OUT |= BIT3
#define rst_rs P1OUT &= ~BIT3
#define set_rw P1OUT |= BIT4
#define rst_rw P1OUT &= ~BIT4
#define set_en P1OUT |= BIT5
#define rst_en P1OUT &= ~BIT5
#define dataout P2DIR = 0xff
#define dataport P2OUT
#define uchar unsigned char
#define CPU_F1 ((double)8000000)
#define delay_us8M(x) __delay_cycles((long)(CPU_F1*(double)x/1000000.0))
#define delay_ms8M(x) __delay_cycles((long)(CPU_F1*(double)x/1000.0))
void write_com(uchar com);
void write_data(uchar data);
long result = 0;
long v_data = 0;
/**
單通道單次采樣
*/
#pragma vector = ADC12_VECTOR
__interrupt void ADC12ISR(void){
while((ADC12IFG & BIT1) == 0);
result = ADC12MEM1;
}
void main( void )
{
// Stop watchdog timer to prevent time out reset
WDTCTL = WDTPW + WDTHOLD;
P1DIR |= BIT3 + BIT4 + BIT5;
dataout;
rst_en;
write_com(0x38);//8 bit data, doule line, 5x7 point matrix
write_com(0x0c);//open display, close cusor,close blink
write_com(0x06);//auto plus 1 after write or read
write_com(0x01);//clear screen
P6SEL |= BIT1;//將P6.1設(shè)置為第二功能，即使能ADC通道
//這里如果想要保險(xiǎn)的話，先設(shè)置ENC=0，但其實(shí)ENC默認(rèn)為0
//1.打開ADC,設(shè)置采樣時(shí)間 4*SHT0_8(b1000)*256
ADC12CTL0 = ADC12ON + SHT0_8;
//2.設(shè)置采樣保持器的脈沖觸發(fā)模式，轉(zhuǎn)換模式=單通道單次轉(zhuǎn)換，轉(zhuǎn)換通道1
ADC12CTL1 = SHP + CONSEQ_0 + CSTARTADD_1;
//3.既然選擇了通道1，就要配置通道1，
//設(shè)置轉(zhuǎn)換通道端口為1即P6.1
ADC12MCTL1 |= INCH_1;
//4.設(shè)置為外部參考電壓源
ADC12MCTL1 |= SREF_2;
delay_ms8M(1);
//5.ENC=1，不能再修改配置
//啟動(dòng)一次AD轉(zhuǎn)換時(shí)，ENC和ADC12SC要同時(shí)設(shè)置
ADC12CTL0 |= ENC + ADC12SC;
//開啟中斷
_EINT();
while(1){
// _EINT();
ADC12CTL0 |= ENC + ADC12SC;
ADC12IE = 0X02;
delay_ms8M(4);
v_data = (long)result * 33;//3.3V參考電壓
v_data = v_data * 10;
v_data = v_data / 4096;//這里把電壓放大了100倍，便于顯示小數(shù)點(diǎn)后兩位
write_com(0x01);//清屏
write_com(0x80);//移到第一行第一列
write_data(v_data/100 + '0');
write_data('.');
write_data(v_data/10%10 + '0');
write_data(v_data%10 + '0');
write_data('V');
delay_ms8M(100);
// //這里其實(shí)可以不關(guān)閉中斷，那相應(yīng)的開始也就不要打開
// _DINT();
}
}
void write_com(uchar com){
rst_rs;
rst_rw;
rst_en;
_NOP();
set_en;// write command rs=0,rw=0,en=1
P2OUT = com;
delay_ms8M(5);
// _NOP();
// _NOP();
// check_busy();
rst_en;
}
void write_data(uchar data){
set_rs;
rst_rw;
rst_en;
_NOP();
set_en;//write data rs=2,rw=0,en=1
P2OUT = data;
delay_ms8M(5);
// _NOP();
// _NOP();
// check_busy();
rst_en;
}

復(fù)制代碼