utils.h File Reference

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Functions
ICACHE_FLASH_ATTR uint16_t	ccit_crc16 (uint16_t crc16, uint8_t *data_p, unsigned int length)
ICACHE_FLASH_ATTR void	w_to_kw_str (char *w, char *kw)
ICACHE_FLASH_ATTR void	kw_to_w_str (char *kw, char *w)
ICACHE_FLASH_ATTR void	mw_to_w_str (char *mw, char *w)
ICACHE_FLASH_ATTR void	divide_str_by_10 (char *str, char *decimal_str)
ICACHE_FLASH_ATTR void	divide_str_by_100 (char *str, char *decimal_str)
ICACHE_FLASH_ATTR void	divide_str_by_1000 (char *str, char *decimal_str)
ICACHE_FLASH_ATTR void	cleanup_decimal_str (char *decimal_str, char *cleaned_up_str, unsigned int length)
ICACHE_FLASH_ATTR unsigned int	decimal_number_length (int n)
ICACHE_FLASH_ATTR int	int_pow (int x, int y)

Function Documentation

ccit_crc16()

ICACHE_FLASH_ATTR uint16_t ccit_crc16	(	uint16_t	crc16,
		uint8_t *	data_p,
		unsigned int	length
	)

Definition at line 47 of file utils.c.

Referenced by cfg_load(), cfg_save(), and kmp_crc16().

                                                                          {
    while (length--) {
        crc16 = (crc16 << 8) ^ ccit_crc16_table[((crc16 >> 8) ^ *data_p++) & 0x00FF];
    }
    return crc16;
}

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cleanup_decimal_str()

ICACHE_FLASH_ATTR void cleanup_decimal_str	(	char *	decimal_str,
		char *	cleaned_up_str,
		unsigned int	length
	)

Definition at line 151 of file utils.c.

References decimal_number_length(), ICACHE_FLASH_ATTR, memcpy, NULL, strcat, strncpy, strstr, and tfp_snprintf().

Referenced by parse_en61107_frame(), and parse_mc66cde_standard_data_1_frame().

                                                                                                         {
    uint32_t value_int, value_frac;
    char *pos;
    uint8_t decimals = 0;
    uint8_t prepend_zeroes;
    char zeroes[8];
    
    memcpy(cleaned_up_str, decimal_str, length);
    cleaned_up_str[length] = 0; // null terminate
    
    pos = strstr(cleaned_up_str, ".");
    if (pos == NULL) {
        // non fractional number
        value_int = atoi(cleaned_up_str);
        tfp_snprintf(cleaned_up_str, length, "%u", value_int);
    }
    else {
        // parse frac
        while ((*(pos + 1 + decimals) >= '0') && (*(pos + 1 + decimals) <= '9')) {
            // count the decimals
            decimals++;
        }
        value_frac = atoi(pos + 1);
        prepend_zeroes = decimals - decimal_number_length(atoi(pos + 1));
        
        zeroes[0] = 0;  // null terminate
        while (prepend_zeroes--) {
            strcat(zeroes, "0");
        }
        
        // parse int
        strncpy(cleaned_up_str, decimal_str, (pos - cleaned_up_str));
        cleaned_up_str[cleaned_up_str - pos] = 0;   // null terminate
        value_int = atoi(cleaned_up_str);
        
        tfp_snprintf(cleaned_up_str, length, "%u.%s%u", value_int, zeroes, value_frac);
    }
}

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decimal_number_length()

ICACHE_FLASH_ATTR unsigned int decimal_number_length

(

int

n

)

Definition at line 191 of file utils.c.

References ICACHE_FLASH_ATTR.

Referenced by cleanup_decimal_str(), and kmp_value_to_string().

                                          {
    int digits;
    
    digits = n < 0; //count "minus"
    do {
        digits++;
    } while (n /= 10);
    
    return digits;
}

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divide_str_by_10()

ICACHE_FLASH_ATTR void divide_str_by_10	(	char *	str,
		char *	decimal_str
	)

Definition at line 110 of file utils.c.

References tfp_snprintf().

Referenced by parse_mc66cde_standard_data_1_frame().

                                                                      {
    int32_t result_int, result_frac;
    int32_t value_int;
    
    value_int = atoi(str);
    
    // ...divide by 10 and prepare decimal string
    result_int = (int32_t)(value_int / 10);
    if (result_int < 0) {
        result_frac = -1 * (value_int % 10);
    }
    else {
        result_frac = value_int % 100;
    }
    
    tfp_snprintf(decimal_str, 8, "%d.%01u", result_int, result_frac);
}

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divide_str_by_100()

ICACHE_FLASH_ATTR void divide_str_by_100	(	char *	str,
		char *	decimal_str
	)

Definition at line 128 of file utils.c.

References tfp_snprintf().

Referenced by parse_mc66cde_inst_values_frame(), and parse_mc66cde_standard_data_1_frame().

                                                                       {
    int32_t result_int, result_frac;
    int32_t value_int;
    
    value_int = atoi(str);
    
    // ...divide by 100 and prepare decimal string
    result_int = (int32_t)(value_int / 100);
    if (result_int < 0) {
        result_frac = -1 * (value_int % 100);
    }
    else {
        result_frac = value_int % 100;
    }
    
    tfp_snprintf(decimal_str, 8, "%d.%02u", result_int, result_frac);
}

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divide_str_by_1000()

ICACHE_FLASH_ATTR void divide_str_by_1000	(	char *	str,
		char *	decimal_str
	)

Definition at line 146 of file utils.c.

References w_to_kw_str().

                                                                        {
    // just a wrapper
    w_to_kw_str(str, decimal_str);
}

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int_pow()

ICACHE_FLASH_ATTR int int_pow	(	int	x,
		int	y
	)

Definition at line 203 of file utils.c.

Referenced by kmp_value_to_double(), kmp_value_to_string(), and kw_to_w_str().

                          {
    int i;
    int result;
    
    if (y == 0) {
        return 1;
    }
    
    result = x;
    for (i = 1; i < y; i++) {
        result *= x;
    }
    return result;
}

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kw_to_w_str()

ICACHE_FLASH_ATTR void kw_to_w_str	(	char *	kw,
		char *	w
	)

Definition at line 67 of file utils.c.

References int_pow(), strlen, and tfp_snprintf().

Referenced by cgiSetup(), and mw_to_w_str().

                                                      {
    uint32_t result_int, result_frac;
    uint32_t i;
    uint32_t len;
    
    bool dec_separator;
    
    char result_int_str[32 + 1];
    
    uint32_t pos_int;
    uint32_t pos_frac;
    
    len = strlen(kw);
    
    result_frac = 0;
    pos_int = 0;
    pos_frac = 0;
    dec_separator = false;
    for (i = 0; i < len && pos_frac < 3; i++) {
        if (kw[i] == '.') {
            dec_separator = 1;
        }
        else if (!dec_separator) {
            result_int_str[pos_int++] = kw[i];
        }
        else {
            //result_frac_str[pos_frac++] = kw[i];
            result_frac += (kw[i] - '0') * int_pow(10, 2 - pos_frac);
            pos_frac++;
        }
    }
    result_int_str[pos_int] = 0;    // null terminate
    result_int = 1000 * atoi(result_int_str);   // multiply by 1000
    
    result_int += result_frac;
    tfp_snprintf(w, 11, "%u", result_int);
}

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mw_to_w_str()

ICACHE_FLASH_ATTR void mw_to_w_str	(	char *	mw,
		char *	w
	)

Definition at line 105 of file utils.c.

References kw_to_w_str().

Referenced by en61107_get_received_energy_kwh(), and kmp_get_received_energy_kwh().

                                                      {
    // just a wrapper
    kw_to_w_str(mw, w);
}

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w_to_kw_str()

ICACHE_FLASH_ATTR void w_to_kw_str	(	char *	w,
		char *	kw
	)

Definition at line 54 of file utils.c.

References tfp_snprintf().

Referenced by divide_str_by_1000(), and tplSetup().

                                                      {
    uint32_t result_int, result_frac;
    uint32_t w_int;
    
    w_int = atoi(w);
    
    // ...divide by 1000 and prepare decimal string in kWh
    result_int = (int32_t)(w_int / 1000);
    result_frac = w_int % 1000;
    
    tfp_snprintf(kw, 15, "%u.%03u", result_int, result_frac);
}

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