String To Hex

基础的将字符串转换成十六进制数

#include <ctype.h>
#include <stdint.h>
void main(void)
{
	uint8_t str[] = "7F3D";
	uint16_t x = 0;
	uint8_t *p = str;
	while (*p)
	{
		if(isdigit(*p)){
			x = x*0x10 + (*p-'0');
		}else if(islower(*p)){
			x = x*0x10 + (*p - 'a' + 10);
		}else{
			x = x*0x10 + (*p - 'A' + 10);
		}
		p++;
	}
}