serial.c

用C语言编写的GSM-SIM驱动程序包

 /****************************************Copyright (c)**************************************************
 **                       Unversity of electronic technology and science of China
 **                                 school of electronic engineer
 **
 **--------------File Info-------------------------------------------------------------------------------
 ** File name:			       serial.c
 ** Last modified Date:	   2006.10.29
 ** Last Version:		
 ** Descriptions:		   serial part of command shell 
 **				
 **------------------------------------------------------------------------------------------------------
 ** Created by:				wang  zheng
 ** Created date:		
 ** Version:				
 ** Descriptions:		
 **
 **------------------------------------------------------------------------------------------------------
 ** Modified by:			wang  zheng
 ** Modified date:		
 ** Version:				
 ** Descriptions:		 
 **
 **------------------------------------------------------------------------------------------------------
 ** Modified by: 
 ** Modified date:
 ** Version:	
 ** Descriptions: 
 **
 ********************************************************************************************************/

#include "command_shell.h"

/*********************************************************************************************************
** 函数名称:   					Uart0_Init( )
** 功能描述: 					initial the uart0, baudrate 4800 ,n,8,1
** 输　入:
** 输　出:
** 全局变量: 
** 调用模块: 
**
** 作　者: 	wangzheng
** 日　期: 	2006.11.02
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void  Uart_Init(void)
{
	TMOD = 0x20;//0010 0000   T/c方式2
	TH1  = 0xf5;//初值f5  20M晶振 9600波特率时
	TL1  = 0xf5;//
	SCON = 0x50;//0101 0000  串口方式1 10位异步通讯
	PCON = PCON|0x80;//SMOD置1，波特率＝溢出率/16
	TR1  = 1;
	EA	 = 1;
	ES   = 1;
}
 	
/*********************************************************************************************************
** 函数名称:   				Uart0_Put_Char
** 功能描述: 			 	put a char to uart0
** 输　入:						char  Data
** 输　出:						  
** 全局变量: 					  
** 调用模块: 
**
** 作　者: wangzheng
** 日　期: 2006.11.02
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void  Uart_Put_Char( int8 Data )
{
	SBUF = Data;
	while(!TI);
	TI=0;
}
/*********************************************************************************************************
** 函数名称: 					   Uart0_Write(int8* ptdata)
** 功能描述: 						print strings  to uart0
** 输　入:							   int8* ptdata
** 输　出:
** 全局变量: 
** 调用模块: 							 Uart0_Put_Char( )
**
** 作　者: wangzheng
** 日　期: 2006.11.02
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void  Uart_Write( int8* ptdata )
{
	while( *ptdata != 0 )
	Uart_Put_Char ( *ptdata++ );
}
/*********************************************************************************************************
** 函数名称:   				Uart0_Get_Char()interrupt 4
** 功能描述: 				 get a char from uart0, interrupt  mode 
** 输　入:						none
** 输　出:
** 全局变量: 					 rec
** 调用模块: 
**
** 作　者: wangzheng
** 日　期: 2006.11.02
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**-------------------------------------------------------------------------------------------------------
** 修改人: wangzheng
** 日　期: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/

void  Uart_Get_Char( void )  interrupt 4
{
	if(RI==1)
	{
		RI = 0;
    	rec = SBUF;

		if(	(rec>=32) && (rec<=126) )				//	rec is between  'space' to  '~'
			curr_sig = normal_char;
						
		switch ( rec)
			{
				case 13	:	curr_sig = cr;			break;
				case 8	:	curr_sig = backspace;	break;
				default : 	break;
			}
		sig_renew = 1;                    // trig the FSM
	 }
}