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#include "msp430.h" #include "HAL_Dogs102x6.h" #define number_of_results 1000 #define Len_Vpp_value 1000 __no_init unsigned int result_dc[number_of_results]; __no_init unsigned int result_ac[number_of_results]; unsigned int count_of_result=0; unsigned int npoint=0; __no_init unsigned int temp_dc[5]; __no_init unsigned int temp_ac[5]; int j=0; //函数声明 void Vpp_detection(void);//得最大vpp值 void AD_init_single(void);//单通道单词采样初始化 void AD_init(void);//序列通道多次采样初始化 void choise(unsigned int *a,int n);//选择排序法排序 void WDT_init(void); //8ms定时器初始化 void AD_start(void);//开始转换 int abs(int a);//求绝对值的函数 int main( void ) { // Stop watchdog timer to prevent time out reset WDTCTL = WDTPW + WDTHOLD; Dogs102x6_init(); Dogs102x6_backlightInit(); Dogs102x6_setBacklight(8); Dogs102x6_clearScreen(); //清屏 Dogs102x6_stringDraw(9, 0, "pressure", DOGS102x6_DRAW_NORMAL); /*AD_init_single(); WDT_init(); //while(ADC12MEM0<)当充气到达定值前等待 WDTCTL = WDTPW + WDTHOLD; //关闭看门狗定时器 //开始采集信号*/ /* AD_init(); AD_start(); WDT_init(); while(j<1000);//当放气到一定值前等待 WDTCTL = WDTPW + WDTHOLD; */ for(int i=0;i<1000;i++){ result_dc[i]=i; } Vpp_detection(); for(int j=0;j<101;j++){ Dogs102x6_pixelDraw(j,result_ac[j*3+100]/40, 0); } return 0; } //ADC采样中断函数 #pragma vector=ADC12_VECTOR __interrupt void ADC12_ISR(void) { switch(__even_in_range(ADC12IV,34)) { case 0: break; // Vector 0: No interrupt case 2: break; // Vector 2: ADC overflow case 4: break; // Vector 4: ADC timing overflow case 6: // Vector 6: ADC12IFG0 if (ADC12MEM0 >= 0x7ff) // ADC12MEM = A0 > 0.5AVcc? P1OUT |= BIT0; // P1.0 = 1 else P1OUT &= ~BIT0; // P1.0 = 0 // Exit active CPU case 8: //序列通道多次采样中断响应函数 temp_dc[npoint]=ADC12MEM0; temp_ac[npoint]=ADC12MEM1; if(npoint==4){ choise(temp_dc,5); choise(temp_ac,5); // result_dc[count_of_result]=(temp_dc[2]+temp_dc[1]+temp_dc[3])/3; result_dc[count_of_result]=count_of_result; result_ac[count_of_result]=(temp_ac[2]+temp_ac[1]+temp_ac[3])/3; count_of_result++; ADC12CTL0&=~ADC12ENC; ADC12CTL0&=~ADC12SC; } npoint++; // Vector 8: ADC12IFG1 case 10: break; // Vector 10: ADC12IFG2 case 12: break; // Vector 12: ADC12IFG3 case 14: break; // Vector 14: ADC12IFG4 case 16: break; // Vector 16: ADC12IFG5 case 18: break; // Vector 18: ADC12IFG6 case 20: break; // Vector 20: ADC12IFG7 case 22: break; // Vector 22: ADC12IFG8 case 24: break; // Vector 24: ADC12IFG9 case 26: break; // Vector 26: ADC12IFG10 case 28: break; // Vector 28: ADC12IFG11 case 30: break; // Vector 30: ADC12IFG12 case 32: break; // Vector 32: ADC12IFG13 case 34: break; // Vector 34: ADC12IFG14 default: break; } } //定时器中断 #pragma vector=WDT_VECTOR __interrupt void watchdog_timer(void){ npoint=0; j++; ADC12CTL0|=ADC12ENC; ADC12CTL0|=ADC12SC; } //单通道单词采样初始化 void AD_init_single(){ P6SEL|=BIT6; P6DIR|=BIT6; ADC12CTL0=ADC12ON+ADC12REFON+ADC12SHT0_6;//采样时间26.6us采样一次+ADC12REF2_5V ADC12CTL1=ADC12SHP; ADC12MCTL0=ADC12INCH_6;//+ADC12SREF_0 ADC12IE=ADC12IE0; _EINT(); ADC12CTL0|=ADC12ENC; } //序列通道多次采样初始化 void AD_init(){ P6SEL|=BIT7+BIT6; P6DIR|=BIT7+BIT6; ADC12CTL0=ADC12ON+ADC12REFON+ADC12MSC+ADC12SHT0_6;//采样时间26.6us采样一次,5个点共0.13ms+ADC12REF2_5V ADC12CTL1=ADC12CONSEQ_3+ADC12SHP; ADC12MCTL0=ADC12INCH_6;//+ADC12SREF_5 ADC12MCTL1=ADC12INCH_7+ADC12EOS;//+ADC12SREF_5 ADC12IE=ADC12IE1; _EINT(); ADC12CTL0|=ADC12ENC; } //选择排序法排序 void choise(unsigned int *a,int n) { unsigned int i,j,k,temp; for(i=0;i<n-1;i++) { k=i; /*给记号赋值*/ for(j=i+1;j<n;j++) if(a[k]>a[j]) k=j; /*是k总是指向最小元素*/ if(i!=k) { /*当k!=i是才交换，否则a[i]即为最小*/ temp=a[i]; a[i]=a[k]; a[k]=temp; } } } //8ms定时器初始化 void WDT_init(){ WDTCTL= WDT_MDLY_8;//8ms定时器 SFRIE1= WDTIE ; _EINT(); } //开始转换 void AD_start(){ ADC12CTL0|=ADC12SC; } //得最大vpp值 void Vpp_detection(void) { int NUM_OF_DATA ; /*数组长度没赋值 */ unsigned int Vpp_value[50] ; unsigned int Dc_value[50]; unsigned int Time_count=0; int Vppmax = 0; int Vppmin = 0; for(int i=0;i<NUM_OF_DATA;i++) { if(result_ac[i] >= Vppmax) Vppmax = result_ac[i]; if(result_ac[i] <= Vppmin) Vppmin = result_ac[i]; } float Vpp_ref = 0.33*(Vppmax - Vppmin); int i=0; //将峰峰值与对应的直流量求出来 while(i<NUM_OF_DATA){ Vppmax=result_ac[i]; Vppmin=result_ac[i]; while(result_ac[i]<Vpp_ref&&i<NUM_OF_DATA){ if(result_ac[i]<Vppmin){ Vppmin=result_ac[i]; } i++; } while(result_ac[i]>Vpp_ref&&i<NUM_OF_DATA){ if(result_ac[i]>Vppmax){ Vppmax=result_ac[i]; } i++; } Vpp_value[Time_count]=Vppmax-Vppmin; Dc_value[Time_count]=result_dc[i]; Time_count++; } //*****找到最大值对应的直流序号***** int max_Vpp_value=Vpp_value[0]; int temp_Vppmax_num=0; for(i=0; i< Time_count; i++ ) { if(Vpp_value[i] > max_Vpp_value) { max_Vpp_value = Vpp_value[i]; temp_Vppmax_num = i; } } int Dc_average_press=Dc_value[temp_Vppmax_num];//平均压 //*****求舒张压和收缩压***** int half_Vppmax_value = max_Vpp_value / 2 ; int threequarter_Vppmax_value = 3 * max_Vpp_value / 4 ; unsigned int absVpp[50]; //重新开一个数组用来存放与0.5VPP差值的绝对值 int minabs=0; int minabs_num=0; for(i=0;i<Time_count;i++){ absVpp[i]=abs(Vpp_value[i]-half_Vppmax_value); } minabs=absVpp[0]; for(i=0; i<temp_Vppmax_num; i++ ) { if (absVpp[i] < minabs) { minabs = absVpp[i] ; minabs_num = i ; } } int Dc_shrink_press = Dc_value[minabs_num]; //收缩压 for(i=0;i<Time_count;i++){ absVpp[i]=abs(Vpp_value[i]-threequarter_Vppmax_value); } minabs=absVpp[temp_Vppmax_num]; for(i=temp_Vppmax_num; i<Time_count; i++ ) { if (absVpp[i] < minabs) { minabs = absVpp[i] ; minabs_num = i ; } } int Dc_diastolic_press = Dc_value[minabs_num]; //舒张压 } int abs(int a){ if(a>0){ return a;} else{ return -a; } }