我都搞胡涂了,str2hex,顾名思义是将字符窜转化为16进制,很绕人!!
//字符串转化为hex码对应的字符串,如把"31323334"转化为"1234"(0x31,0x32,0x33,0x34)
int str2hex(unsigned char *read, unsigned char *write, int len);
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//hex码对应的字符串转化为字符串,如把(0x32,0x1A)转化为"321A"
void hex2str(unsigned char *read, unsigned char **write, int len);
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