很多人都喜欢用LED来做调试，看看这是共阴还是共阳

wstt

很多人都喜欢用LED来做调试，看看这是共阴还是共阳 [复制链接]

还有这个电阻是是多大的呢？

1. #include "msp430g2211.h"
   
2. #define LED4 BIT1
   
3. #define LED3 BIT2
   
4. #define LED2 BIT3
   
5. #define LED1 BIT4
   
6. #define LED0 BIT5
   
7. #define BUZZER BIT6
   
8. 
   
9. void main( void ) {
   
10. 
    
11. // Stop watchdog timer to prevent time out reset
    
12. WDTCTL = WDTPW + WDTHOLD;
    
13. // Set DCO to 1MHz factory calibration value
    
14. BCSCTL1 = CALBC1_1MHZ;
    
15. DCOCTL = CALDCO_1MHZ;
    
16. 
    
17. //all LED pins and buzzer as output
    
18. P1DIR |= (LED0 + LED1 + LED2 + LED3 + LED4 + BUZZER);
    
19. 
    
20. P1OUT |= LED0;
    
21. P1OUT &= ~LED0;
    
22. P1OUT |= LED1;
    
23. P1OUT &= ~LED1;
    
24. P1OUT |= LED2;
    
25. P1OUT &= ~LED2;
    
26. P1OUT |= LED3;
    
27. P1OUT &= ~LED3;
    
28. P1OUT |= LED4;
    
29. P1OUT &= ~LED4;
    
30. 
    
31. while(1){} //do nothing forever...

复制代码

还有源码，看起来应该还漏掉了一个"}"

小右派

共阳极，电阻取500欧姆

风的世界

共阴。都把电阻连GND了。