程序从MSP430FR4133移植到MSP430FR6972如何做到低功耗一样？

只看该作者 · 2019-3-15 10:59

程序内容：RTC 、LCD显示、ADC电池采样；MSP430FR4133可以做到7UA，MSP430FR6972却有40UA；多余的电流经查ADC（10UA），AD 关闭，内部参考电压无法关闭而MSP430FR4133可以关闭，为什么？

void ADC12_Config() // MSP430FR6972

{

PMMCTL0= SVSHE + PMMPW;

while(REFCTL0& REFGENBUSY); // If refgenerator busy, WAIT

REFCTL0 |= REFVSEL_1 + REFON; // Enable internal 2.0V reference //参考电压配置

ADC12CTL0 &= ~ADC12ENC; // Disable ADC12 (在ADC12ENC=0的情况下，修改启动或关闭AD)

ADC12CTL0 = ADC12SHT0_8 + ADC12ON; // Set sample time 采样保持时间 256ADCCLK；启动AD

ADC12CTL1 = ADC12SHP; // Enable sample timer ADCCLK = MODOSC; sampling timer ：从采样保持器中获取信号

ADC12CTL2 |= ADC12RES_2; // 12-bit conversion results分辨率

ADC12CTL3 = ADC12BATMAP; // Enable internal 1/2 AVCC+

ADC12MCTL0 = ADC12VRSEL_1 + ADC12INCH_31; // ADC input ch A30 =>internal 1/2 AVCC+

ADC12IER0 |= ADC12IE0; // ADC_IFG upon convresult-ADCMEMO

while(!(REFCTL0 & REFGENRDY)); // Wait for reference generator

//to settle

ADC12CTL0 |= ADC12ENC;

__delay_cycles(400);

}

ADC中断

case ADC12IV_ADC12IFG0: // Vector 12: ADC12MEM0 Interrupt

ui16Bat_Vol = (uint32_t)100*ADC12MEM0/0x3FF;

if(ui16Bat_Vol_Old!=ui16Bat_Vol)

{

bADC_done_flag= true;

ui16Bat_Vol_Old= ui16Bat_Vol;

}

//Exit from LPM0 and continue executing main

while(REFCTL0 & REFGENBUSY); // If ref generator busy, WAIT

REFCTL0 = 0;

while(!(REFCTL0 & REFGENRDY)); // Wait for reference generator

ADC12CTL0 &= ~ADC12ENC;

ADC12CTL0 &= ~ADC12ON; //AD 关闭

break;

只看该作者 · 2019-3-15 10:59

void ADC10_Config() // MSP430FR4133
{
CSCTL8 |= MODCLKREQEN;
PMMCTL0 = SVSHE + PMMPW;

PMMCTL2 |= INTREFEN;             // 1.5V voltage reference generate
ADCCTL0 = ADCSHT_8 + ADCON;       // 256 ADCCLK cycles

ADCCTL1 = ADCSHS_0 + ADCSHP + ADCSSEL_0 + ADCCONSEQ_0;  // ADCSC bit SHS,
// MODCLK
// SC-SC  单通道单次
ADCCTL2 |= ADCRES + ADCSR;       // 10 bit resolution, 50ksps
ADCMCTL0 = ADCSREF_0 + ADCINCH_13;  // Reference AVCC+/AVSS-, Channel 13
ADCIE |= ADCIE0;                   // Interrupt enable

__delay_cycles(400);
}
ADC中断
case 12:  // MSP430FR4133
。。。
PMMCTL2 &= ~INTREFEN; // 关闭内部参考电压为低功耗
ADCCTL0 &= ~ADCON; //AD 关闭
break;

只看该作者 · 2019-3-15 11:00

还有不执行LCD显示，电流就降到8.5UA，那就差不多，LCD显示攻耗近20UA太大了，我现在这样设置有错吗？电路差不多，区别就在R23/LCDCAP 接4.7uF，而FR4133 接0.1uF
VSS--4.7uF -| R23/LCDCAP
VSS--0.1uF -|R03
VSS--0.1uF -|R13
VSS--0.1uF -|R23
程序设置有错吗？
void CLOCK_Config()  // MSP430FR6972
{
PJSEL0 = BIT4 | BIT5;                // For LFXT
// Configure LFXT 32kHz crystal
  CSCTL0_H = CSKEY >> 8;                // Unlock CS registers
  CSCTL4 &= ~LFXTOFF;                   // Enable LFXT
  do
  {
CSCTL5 &= ~LFXTOFFG;                // Clear LFXT fault flag  清除 LFXT 失效标志
SFRIFG1 &= ~OFIFG;
  } while (SFRIFG1 & OFIFG);             // Test oscillator fault flag  如果失效标志存在
  CSCTL0_H = 0;                         // Lock CS registers
}

void LCD_Config(void)  // MSP430FR6972
{
   //Initialize LCD segments 0 - 15;  18 - 21; 24 ; 28 - 30
  LCDCPCTL0 = 0xFFFF;
  LCDCPCTL1 = 0x713C;
  LCDCPCTL2 = 0x0000; //设置LCD管脚 L0 - L15; L18 - L21; L24 ; 28 - 30 pins selected

  // Initialize LCD_C
  // ACLK, Divider = 1, Pre-divider = 16; 4-pin MUX
  LCDCCTL0 = LCDDIV__1 | LCDPRE__16 | LCD4MUX | LCDLP;

  // VLCD generated internally,
  // V2-V4 generated internally, v5 to ground
  // Set VLCD voltage to 2.60v
  // Enable charge pump and select internal reference for it
  LCDCVCTL = VLCD_2_96 | VLCDREF_0 | LCDCPEN;

  LCDCCPCTL = LCDCPCLKSYNC;             // Clock synchronization enabled

  LCDCMEMCTL = LCDCLRM;                // Clear LCD memory

  //Turn LCD on
  LCDCCTL0 |= LCDON;  // 打开LCD
}

只看该作者 · 2019-3-15 11:01

void CLOCK_Config()// MSP430FR4133
{
P4SEL0 |= BIT1 + BIT2;                // Select pin4.1 pin4.2 as crystal function
do
{
CSCTL7 &= ~(XT1OFFG + DCOFFG); // Clear XT1 and DCO fault flag  清除 XT1 DCO 失效标志
SFRIFG1 &= ~OFIFG;
}while (SFRIFG1 & OFIFG);          // Test oscillator fault flag  如果失效标志存在

CSCTL4 = SELA__XT1CLK; // IMPORTANT. Select ACLK = XT1 = 32768Hz
}

void LCD_Config(void) // MSP430FR4133
{
uint8_t ui8Cnt;
uint8_t *pLCD = (uint8_t *)&LCDM0;

for (ui8Cnt = 13; ui8Cnt > 0; ui8Cnt--) // Clear LCD memory
*pLCD++ = 0x00; // CLR LCD

SYSCFG2 |= LCDPCTL;       // R13/R23/R33/LCDC1/LCDC2 pins selected  设置 LCD功耗

LCDPCTL0 = 0xFFFF;
LCDPCTL1 = 0x01FF; //设置 LCD管脚 L0~L24 pins selected

LCDVCTL = LCDSELVDD + LCDCPEN; // Mode 2 设置降低LCD 功耗片上电荷泵

LCDCSSEL0 = 0x000F; // 设置公共极  COM0~3
LCDCSSEL1 = 0x0000;

  LCDM0 = 0x21;                      // L0 = COM0, L1 = COM1
  LCDM1 = 0x84;

LCDCTL0 |= LCD4MUX + LCDLP + LCDON; // 打开LCD: 4-mux 模式
}

只看该作者 · 2019-3-15 14:41

ADC功耗问题已经找到
ADC12CTL0 &= ~ADC12ENC;
REFCTL0 &= ~REFON;
ADC12CTL0 &= ~ADC12ON; //AD 关闭

程序从MSP430FR4133移植到MSP430FR6972如何做到低功耗一样？

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