Question

我想将电源ON检测到OFF，并希望将重要数据写入内部闪存。

问题是我的代码在关闭到ON而不是关闭时进入ISR。

我遇到问题

任何帮助将不胜感激

这是我的代码

#include <msp430.h>

/*
 * main.c
 */
void write_SegC(void);
void copy_from_FlashC(void);
void PMM_config(void);
void UCS_config(void);

char Flash_Data[20] = {0,0,3,4,5,6,7,8,0,0,0,5,5,5,0,8,8,9,2,3};
char Flash_Data1[20] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

int main(void) {
    WDTCTL = WDTPW | WDTHOLD;  // Stop watchdog timer
    P1DIR |= BIT0;
    P1REN |= BIT6;
    UCS_config();
    PMM_config();
    UCS_config();

    while(1)
    {
        copy_from_FlashC();
    }
    return 0;
}

void copy_from_FlashC(void)
{
    unsigned int i;
    char *Flash_ptrC;

    Flash_ptrC = (char *) 0x1880;           // Initialize Flash segment C ptr

    FCTL3 = FWKEY;                              // Clear Lock bit
    FCTL1 = FWKEY;
    FCTL4 = FWKEY | MGR0 ;

    for (i = 0; i < 20; i++)
    {
        //     *Flash_ptrD++ = *Flash_ptrC++;      // copy value segment C to seg D
        Flash_Data1[i] = *Flash_ptrC++;
    }

    FCTL1 = FWKEY;                          // Clear WRT bit
    FCTL3 = FWKEY | LOCK;                   // Set LOCK bit
}

void write_SegC(void)
{
    P1OUT |= BIT0;

    unsigned int i;
    char *Flash_ptr;                        // Initialize Flash pointer

    Flash_ptr = (char *)0x1880;

    FCTL3 = FWKEY;                          // Clear Lock bit
    FCTL1 = FWKEY | ERASE;                  // Set Erase bit
    *Flash_ptr = 0;                         // Dummy write to erase Flash seg
    FCTL1 = FWKEY | WRT;                    // Set WRT bit for write operation


    for (i = 0; i < 20; i++)
    {
        *Flash_ptr++ = Flash_Data[i];             // Write value to flash
    }

    FCTL1 = FWKEY;                          // Clear WRT bit
    FCTL3 = FWKEY | LOCK;                   // Set LOCK bit
    P1OUT &= ~BIT0;
}

void PMM_config(void)
{
    //unlock PMM
    PMMCTL0_H=PMMPW_H;
    PMMCTL0_L|=PMMCOREV_3;
    //check voltage level
    switch(PMMCTL0&PMMCOREV_3)
    {
            //settings for highest core voltage settings
        case PMMCOREV_3:
            //setup high side supervisor and monitor
            SVSMHCTL=SVMHE|SVSHE|SVSHRVL_3|SVSMHRRL_7;
            break;
    }
    //clear interrupt flags
    PMMIFG&=~(SVMLIFG|SVMHIFG|SVMHVLRIFG|SVMLVLRIFG);
    //setup interrupts
    PMMRIE|=SVMLIE|SVMHIE|SVMHVLRIE|SVMLVLRIE;
    //lock PMM
    PMMCTL0_H=0;
}

#pragma vector = SYSNMI_VECTOR
__interrupt void SYS_NMI(void)
{
    switch(SYSSNIV)
    {
            //core supply voltage monitor interrupt
        case SYSSNIV_SVMLIFG:
            //event to report error
            //set flag
            break;
            //input supply voltage monitor interrupt
        case SYSSNIV_SVMHIFG:
            write_SegC();
            //   Clear_SegC(value);     // For testing only
            //event to report error
            //set flag
            break;
            //core supply voltage monitor delay interrupt
        case SYSSNIV_DLYLIFG:
            break;
            //interrupt supply voltage monitor delay interrupt
        case SYSSNIV_DLYHIFG:
            break;
            //Vacant memory access interrupt
        case SYSSNIV_VMAIFG:
            break;
            //JTAG mailbox in interrupt
        case SYSSNIV_JMBINIFG:
            break;
            //JTAG mailbox out interrupt
        case SYSSNIV_JMBOUTIFG:
            break;
            //SVMLVLRIFGSVMHVLRIFG
        case SYSSNIV_VLRLIFG:
            //clear interrupt flag bits
            //unlock PMM
            PMMCTL0_H=PMMPW_H;
            //clear interrupt flags
            PMMIFG&=~(SVMLIFG|SVMLVLRIFG);
            //lock PMM
            PMMCTL0_H=0;
            break;
            //SVMHVLRIFGSVMHVLRIFG
        case SYSSNIV_VLRHIFG:
            //clear interrupt flag bits
            //unlock PMM
            PMMCTL0_H=PMMPW_H;
            //clear interrupt flags
            PMMIFG&=~(SVMHIFG|SVMHVLRIFG);
            //lock PMM
            PMMCTL0_H=0;
            break;
    }
}

void UCS_config(void)
{
    PMMCTL0_H = 0xA5;
    PMMCTL0_L = 0x03;
    UCSCTL0 = UCSCTL0 | 0x1F00;
    UCSCTL1 = UCSCTL1 & 0x0000;
    UCSCTL1 = UCSCTL1 | 0x0040;
    UCSCTL2 = UCSCTL2 & 0x0000 ; // FLL Divider
    UCSCTL2 = UCSCTL2 | 0x304F ; // for 20 MHz MCLK and 2.6 MHz SMCLK
    UCSCTL3 = 0x0000;

    UCSCTL4 = UCSCTL4 & 0X0000;
    UCSCTL4 = UCSCTL4 | 0X0043;
}

Answer 1

来自http://www.ti.com/lit/ug/slau144j/slau144j.pdf

POR是器件复位。 POR仅由以下生成   三件事：

•打开设备电源

•配置为复位模式时，RST / NMI引脚上的信号为低电平

•PORON = 1时的SVS低电平

因此，如果您的设备没有“电源电压监控器”选项，那么选择是使用ADC。

断电检测MSP430

1 个答案: