1. The reset circuit has no switch and is uncontrollable
Connect a switch and a 10k resistor branch in parallel next to the capacitor.
2. The external crystal oscillator referenced by the crystal oscillator circuit,
Theoretically, XTAL2 is left floating and XTAL1 is connected to the external oscillation signal.
1 //ProjeceName:TwoLed
2 //write by:cyt
3 //Time:2017-2-10
4 #include
5
6 void main()
7 {
8 unsigned int a=0;
9 unsigned char b=0;
10 do{
11 for(a=0;a<50000;a++)
12 P1_0 = 0;
13 P1_0 = 1;
14 for(b=0;b<200;b++)
15 P1_1 = 0;
16 P1_1 = 1;
17 for(a=0;a<30000;a++)
18 ;
19 }while(1);
20 }
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