[size=4][color=#ff0000] First of all, please note that this is not written by me. I saw it in an "anonymous" four-axis communication group and copied it to share. [/color][/size] [size=4][color=#ff000
#include
#define uchar unsigned char #define uint unsigned int #define dao 523 //Define the "dao" macro as the frequency of middle tone "1" 523Hz #define re 587 //Define the "re" macro as the frequenc
Because I bought the duplicate train ticket, I posted the transfer information on Ganji.com. Within a minute, the first call came in, and my phone never stopped ringing. During the call, there was a b
A question about interrupts! Please answer it! The example requires to enable two external interrupts, set the low level to trigger the interrupt, use the timer technology and display the first two di