经常在运行过程中有这个错误.

MSP430: Trouble Reading Memory Block at 0x23fc on Page 0 of Length 0x2: Could not determine device state  如果发生,在程序第一句就会发生
MSP430: Failed Software Reset: Could not read Enhanced Emulation Module register 在PMM设置后发生
MSP430: Trouble Reading Memory Block at 0x23fc on Page 0 of Length 0x2: No error 不设置PMM的话,直接配置时候会发生
MSP430: Trouble Reading Memory Block at 0xf3ffe on Page 0 of Length 0x95: Invalid parameter(s) 不设置PMM,直接设置也可能发生

配置外部32.768khz rtc时钟,必复位MCU.

TARGET:MSP430F6721

1. #include
   
2. 
   
3. /*
   
4. * main.c
   
5. */
   
6. int main(void) {
   
7. 
   
8.         WDTCTL = WDTPW | WDTHOLD;        // Stop watchdog timer
   
9.        
   
10.     PJDIR |= BIT0 | BIT1 | BIT3;
    
11.     PJSEL |= BIT0 | BIT1 | BIT3;
    
12. //
    
13. //    PMMCTL0_H = PMMPW_H;
    
14. //    SVSMHCTL = SVSHE + SVSHRVL0 * PMMCOREV_3 + SVMHE + SVSMHRRL0 * PMMCOREV_3;
    
15. //    SVSMLCTL = SVSLE + SVMLE + SVSMLRRL0 * PMMCOREV_3;
    
16. //    while ((PMMIFG & SVSMLDLYIFG) == 0);
    
17. //    PMMIFG &= ~(SVMLVLRIFG + SVMLIFG);
    
18. //    PMMCTL0_L = PMMCOREV0 * PMMCOREV_3;
    
19. //    if ((PMMIFG & SVMLIFG))
    
20. //      while ((PMMIFG & SVMLVLRIFG) == 0);
    
21. //    SVSMLCTL = SVSLE + SVSLRVL0 * PMMCOREV_3 + SVMLE + SVSMLRRL0 * PMMCOREV_3;
    
22. //    PMMCTL0_H = 0x00;
    
23. 
    
24.     // DCO  = 31 MOD = 0
    
25.     UCSCTL0_H = 31;
    
26.     UCSCTL1_L = DCORSEL_7;
    
27.     UCSCTL4 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;
    
28.     UCSCTL5 = DIVA__32 | DIVS__8 | DIVM__1;
    
29.     UCSCTL6 &= ~(XT1OFF);
    
30.     UCSCTL6 |= XCAP_3;
    
31. 
    
32. //
    
33. //    do
    
34. //    {
    
35. //        UCSCTL7 &= ~(XT2OFFG | XT1LFOFFG | DCOFFG);
    
36. //        SFRIFG1 &= ~OFIFG;
    
37. //    } while (SFRIFG1 & OFIFG);
    
38. 
    
39.     _nop();
    
40. 
    
41.     while(1){
    
42. 
    
43.     }
    
44. 
    
45. }
    

复制代码怎么处理 此帖出自小平头技术问答