utils_custom_v1_01.c

LPC2300 MP3 Player code

#include "app_config.h"

char hextable(unsigned char hex)
{
	if (hex < 10)
		return (hex + 0x30);
	else
		return (hex - 10 + 'A');
}

char to_upper(char c)
{
	if ((c >= 'a')&&(c <= 'z'))
		return (c - 0x20);
	else
		return (c);
}

unsigned char check_m_n(char c, char m, char n)
{
	if ((c >= m)&&(c <= n))
		return (1);
	else
		return (0);
}

unsigned char to_bcd(char c0, char c1)
{
	c0 = c0 - 0x30;
	c1 = c1 - 0x30;
	c0 = c0 << 4;
	c0 |= c1;
	return (c0);
}

void to_num(unsigned char hex, unsigned char *num_buf)
{
	num_buf[0] = hex / 100;
	hex = hex % 100;
	num_buf[1] = hex / 10;
	hex = hex % 10;
	num_buf[2] = hex;
}

unsigned char compare_string(char *str1,char *str2,unsigned char max_len)
{
	unsigned char i;
	unsigned char res = 1;
	i = 0;
	while (((str1[i]) || (str2[i])) && (i < max_len))
	{
		if (str1[i] != str2[i])
			res = 0;
		i++;
	}
	return (res);
}

unsigned char compare_string2(const char *str1,char *str2,unsigned char max_len)
{
	unsigned char i;
	unsigned char res = 1;
	i = 0;
	while (((str1[i]) || (str2[i])) && (i < max_len))
	{
		if (str1[i] != str2[i])
			res = 0;
		i++;
	}
	return (res);
}