MY_DAC12.rar_MSP430F169 DAC_MY_DAC12_dac12_msp430f169_msp430f169

#include <io430x16x.h> void SysIn() { unsigned int i; WDTCTL = WDTPW + WDTHOLD;//关闭看门狗 //使用XT2振荡器 BCSCTL1 &= ~XT2OFF; do { IFG1 &= ~OFIFG; //清振荡失效标志 for(i = 0xff; i > 0;i--); //延时等待起振 }while(IFG1&OFIFG );//判断XT2是否起振 BCSCTL2 |= SELM_2 + SELS; //选择MCLK,SMCLK时钟都为XT2振荡器提供 } /*--------------------------------------- 输入: i = 1,打开DAC;i = 10,关闭DAC m = 0,选择DAC0;m = 1,选择DAC1 -----------------------------------------*/ void Dac12Ctl(unsigned int i, unsigned int m) { if((i == 1)&&(m == 0)) { DAC12_0CTL |= DAC12ENC; } if((i == 10)&&(m == 0)) { DAC12_0CTL &= ~DAC12ENC; } if((i == 1)&&(m == 1)) { DAC12_1CTL |= DAC12ENC; } if((i == 10)&&(m == 1)) { DAC12_1CTL &= ~DAC12ENC; } } /*------------------------------------------ 输入:data:待转换的数据 m:选择通道 0:DAC0;1:DAC1 ---------------------------------------------*/ void Dac12Write(unsigned int data,unsigned int m ) { if(m == 0) { DAC12_0CTL = data; } if(m == 1) { DAC12_1CTL = data; } } void main() { ADC12CTL0 = REF2_5V + REFON; //打开内部参考电压，Vref=2.5 //设置DAC12通道0 DAC12_0CTL = DAC12IR + DAC12AMP_7 + DAC12RES + DAC12LSEL_0; //满量程为参考电压，高速度/电流输出，8位分辨率,Vref+为参考电压 DAC12_0CTL |= DAC12CALON;//自动校准DA输出 //设置DAC12通道1 DAC12_1CTL = DAC12IR + DAC12AMP_7 + DAC12RES + DAC12LSEL_0; //满量程为参考电压，高速度/电流输出，8位分辨率，Vref+为参考电压 DAC12_0CTL |= DAC12CALON;//自动校准DA输出 //等待校准结束 while(DAC12_0CTL & DAC12CALON == DAC12CALON); while(DAC12_1CTL & DAC12CALON == DAC12CALON);//校准完毕，自动置位 Dac12Ctl(1,0); Dac12Ctl(2,0); Dac12Write(0xff,0); Dac12Write(0x80,0); }