TLV5638.rar_ MSP430 tlv5638_TLV5638_msp430 TLV5638_tlv56_tlv5638

#include <msp430x14x.h> #define uint unsigned int #define uchar unsigned char #define IN_1024 0 //内部1.024V参考源 #define IN_2048 1 //内部2.048V参考源 #define DA_DIN_ON P1OUT|=BIT0; #define DA_DIN_OFF P1OUT&=~BIT0; #define DA_CLK_ON P1OUT|=BIT1; #define DA_CLK_OFF P1OUT&=~BIT1; #define DA_CS_ON P1OUT|=BIT2; #define DA_CS_OFF P1OUT&=~BIT2; void DA_send(unsigned int ch) { uchar i; for(i=0;i<16;i++) { DA_CLK_OFF; if((ch&0x8000)==0x8000) //发送数据 { DA_DIN_ON; } else { DA_DIN_OFF; } DA_CLK_ON; ch<<=1; //左移一位 } DA_CLK_OFF; } //---------- void DA_IN(unsigned int ch) { DA_CS_OFF; DA_send(ch); DA_CS_ON; } void init_clock(void) { uchar i; /*------选择系统主时钟为8MHz-------*/ BCSCTL1 &= ~XT2OFF; //打开XT2高频晶体振荡器 do { IFG1 &= ~OFIFG; //清除晶振失败标志 for(i=0xFF;i>0;i--); //等待8MHz晶体起振 } while ((IFG1&OFIFG)); //晶振失效标志仍然存在 BCSCTL2 |= SELM_2 + SELS; //MCLK和SMCLK选择高频晶振 } int Volt_Data(uint ref,float out_volt) { int temp; switch(ref) { case IN_1024:temp=(int)((out_volt*4096)/(2*1.024)); break; case IN_2048:temp=(int)((out_volt*4096)/(2*2.048)); break; default:break; } return(temp&0x0fff|0xc000); //return(temp|0x0fff|0xc000); } //---------------------- void main(void) { WDTCTL=WDTPW+WDTHOLD; //关看门狗 init_clock(); P1DIR|=0x07; P1SEL=0X00; DA_IN(0xd002); //选用内部基准2.048V while(1) { DA_IN(Volt_Data(IN_2048,1.3)); //选用内部基准2.048V // DA_IN(0xc3e8); //1V //DA_IN(0xc5dc); //1.5V //DA_IN(0xc7d0); //2V } }