TI中文支持网我想利用MSP430F6736芯片自己编程用来测量单相电能消耗，按照官方提供的PDF来做，可是自己编的代码测量时数据变化特别大，并且没有输入时也会有数据出现，求代码！
灰小子：
楼主按照哪个pdf来设计的？
建议提供硬件电路和代码，大家帮你分析下问题所在。
shari zhang：
这是我编写的代码，附件中是我参照的PDF，请大家帮忙指出问题，谢谢了~
#include "msp430f6736.h"#include "math.h"#define PRE1 0#define sampleCount0 4096#define sampleCount1 4096float Kv0=0.82605547515;float Kv1=1;/* Array to store SD24 conversion internal offset */long int offset[4];/* Array to store SD24 conversion results */long int results[4];double tempCH0,tempCH1,VotageCH0,VotageCH1;
//increasing core voltage.Note: Change core voltage one level at a time,see datasheet f6736void SetVCoreUp(unsigned int level){// Open PMM registers for write accessPMMCTL0_H = 0xA5;// Make sure no flags are set for iterative sequenceswhile ((PMMIFG & SVSMHDLYIFG) == 0);while ((PMMIFG & SVSMLDLYIFG) == 0);// Set SVS/SVM high side new levelSVSMHCTL = SVSHE + SVSHRVL0 * level + SVMHE + SVSMHRRL0 * level;// Set SVM low side to new levelSVSMLCTL = SVSLE + SVMLE + SVSMLRRL0 * level;// Wait till SVM is settledwhile ((PMMIFG & SVSMLDLYIFG) == 0);// Clear already set flagsPMMIFG &= ~(SVMLVLRIFG + SVMLIFG);// Set VCore to new levelPMMCTL0_L = PMMCOREV0 * level;// Wait till new level reachedif ((PMMIFG & SVMLIFG))while ((PMMIFG & SVMLVLRIFG) == 0);// Set SVS/SVM low side to new levelSVSMLCTL = SVSLE + SVSLRVL0 * level + SVMLE + SVSMLRRL0 * level;// Lock PMM registers for write accessPMMCTL0_H = 0x00;}
// Initialize DCO to 16MHz void TIME(void) { //SetVCoreUp(1); //一次提高Vcore电压等级，具体请参考手册 //SetVCoreUp(2); //SetVCoreUp(3); /* * 默认状态下：ACLK=FLLREFCLK=XT1 SMCLK=MCLK=DCOCLKDIV XT2关闭 * 为了不产生XT1LFOFFG，将ACLK和FLLREFCLK设置为REFOCLK * 并打开XT2OFF，否则XT2将处于无法使用状态 * */ //UCSCTL6 &= ~(XT2DRIVE0|XT2DRIVE1|XT2OFF); UCSCTL3 = SELREF_2; // Set DCO FLL reference = REFO UCSCTL4 |= SELA_2; // Set ACLK = REFO __bis_SR_register(SCG0); // Disable the FLL control loop UCSCTL0=0x0000; // Set lowest possible DCOx, MODx UCSCTL1=DCORSEL_7; //DCO max 19.6MHz UCSCTL1=FLLD_4|33; // Set DCO Multiplier for 16MHz //DCOCLKDIV = (N+1)*(REFCLK/n)=(33+1)*(32768/1)=1.1MHz;default:REFCLK=XT1CLK=32.768KHz,n=1 // Set FLL Div = fDCOCLK/16 __bic_SR_register(SCG0); // Enable the FLL control loop __delay_cycles(782000); do { UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + DCOFFG); // Clear XT2,XT1,DCO fault flags SFRIFG1 &= ~OFIFG; // Clear fault flags }while (SFRIFG1&OFIFG); // Test oscillator fault flag }
void SD24Init(void){ SD24BCTL0=SD24REFS+SD24SSEL__SMCLK; // Use internal reference, SMCLK SD24BCTL1=SD24GRP0SC+SD24GRP1SC; SD24BCCTL0=SD24DF_1+SD24CAL+0x0008+SD24SCS_4; //Data Format: 2's complement,right aligned,SD24B Calibration, continuous conversion,SD24SCSx=100b SD24BOSR0=256-1; //Default is 256 SD24BCCTL1=SD24DF_1+SD24CAL+0x0100+0x0008+SD24SCS_4; //Data Format: 2's complement,right aligned,SD24B Calibration, Single conversion,SD24SCSx=100b SD24BOSR1=256-1; SD24BPRE1=PRE1; //SD24BTRGCTL=SD24SNGL; SD24BIE=SD24IE0+SD24IE1; for (int i = 0; i < 0x3600; i++); // Delay for 1.2V ref startup} void main(void){ WDTCTL = WDTPW + WDTHOLD; // Stop WDT
TIME(); UCSCTL4=SELS_4+SELM_4; //SMCLK=MCLK=DCODIV=1.1MHz SD24Init(); while(1) {
SD24BCCTL0 |= SD24SC; //+SD24SCS_4// Start of conversion SD24BCCTL1 |= SD24SC; //+SD24SCS_4// Start of conversion //SD24BTRGCTL=SD24SC; __bis_SR_register(LPM0_bits+GIE); // Enter LPM0 w/ interrupts } // P1DIR |= 0x80; // Set P1.0 to output direction( to control led )}
#pragma vector=SD24B_VECTOR__interrupt void SD24BISR(void){ static int getOffset=0,countCH0=0,countCH1=0; //Get internal offset,without voltage input if(getOffset==0) { switch (SD24BIV) { case 2: break; case 4: break; case 6: // SD24_B converter 0 memory interrupt flag; InterruptFlag: SD24IFG0 offset[0]=SD24BMEMH0; offset[1]=SD24BMEML0; break; case 8: // SD24_B converter 1 memory interrupt flag; InterruptFlag: SD24IFG1 offset[2]=SD24BMEMH1; offset[3]=SD24BMEML1; break; } getOffset++; } //Get Vrms else { switch (SD24BIV) { case 2: break; case 4: break; case 6: // SD24_B converter 0 memory interrupt flag; InterruptFlag: SD24IFG0 results[0] = SD24BMEMH0-offset[0]; results[1] = SD24BMEML0-offset[1]; tempCH0+=pow(((results[0]<<16)|results[1])>>16,2); countCH0++; if(countCH0==sampleCount0) {VotageCH0=Kv0*sqrt(tempCH0/sampleCount0);tempCH0=0;countCH0=0;} break; case 8: // SD24_B converter 1 memory interrupt flag; InterruptFlag: SD24IFG1 results[2] = SD24BMEMH1-offset[2]; results[3] = SD24BMEML1-offset[3]; countCH1++; tempCH1+=pow(((results[2]<<16)|results[3])>>16,2); if(countCH1==sampleCount1) {VotageCH1=Kv1*sqrt(tempCH1/sampleCount1);tempCH1=0;countCH1=0;} break; } } __bic_SR_register_on_exit(LPM0_bits); // Exit LPM0}
shari zhang：
这是我画的PCB板子，请大家看看是否有问题。
Susan Yang：
回复 shari zhang:
您可以参考 http://www.ti.com.cn/cn/lit/an/slaa517d/slaa517d.pdf 这个文档是针对MSP430F6736(A)的
shari zhang：
回复 Susan Yang:
您好，我就是按照这个PDF来做的。
Fangwen Xu：
回复 Susan Yang:
您好，请问这个文档中以下电路图部分JP1的2引脚是不是必须接DVCC啊，方案中没有标出来？
