asc_to_long.c

单片机C源程序souce

/**************************************
File          :  ASC_TO_LONG.C
Project       :  BDTRV20_MCU_V07
Description   :  将ASCII转换成一个long型数据
Created       :  2006.11.7
Last updata   :  
Author        :  Sunzehui   [e-mail]
Compile Tool  :  Keil uVision2
Target Device :  SST89V564RD
Circuit Board :  BD7700
************************************
Modification History
************************************
 Version      : v2.0
 Date         : MM/DD/YYYY
 Modifier     :
 Description  :

 **********************************
 -- Copyright (c)
*************************************/

extern unsigned long asc_to_long(unsigned char *p,bit m)
	{
	unsigned long xdata da=0;
	unsigned char temp=0;
	if (m==1)
	{ 
	temp = *p++-0x30;
	da =(long)temp*10000000;
	temp = *p++-0x30;
	da =da+(long)temp*1000000;
	temp = *p++-0x30;
	da =da+(long)temp*100000;
	}
	else
	{
	p++;p++;p++;
	}	
	temp = *p++-0x30;
	da =da+(long)temp*10000;
	temp = *p++-0x30;
	da =da+(long)temp*1000;
	temp = *p++-0x30;
	da =da+(long)temp*100;
	temp = *p++-0x30;
	da =da+(long)temp*10;
	da =da+(*p-0x30);
	return da;
	}