sci_com.h

经过改进之后的CAN－USB接口卡固件程序

/***************************************************************************
    FUNCTION: static void Execute_Command_SCI0(const char *cmd)

    PURPOSE: 串口0对接收到的字符串，执行命令
****************************************************************************/
static void Execute_Command_SCI0(const char *cmd)
{

}


//串口0中断
interrupt void SCI0_ISR(void)
{
	static char command[20]; /* enough to hold "stop" or a single digit number */
	static unsigned char i=0; /* index into command */
	unsigned char rc;
	ulong error_count = 0;
	
	rc = SCI0SR1; /* dummy read to clear flags */
	rc = SCI0DRL; /* data read */

	if (i >= sizeof(command)-1 || rc == '!') 
	{
		command[i] = '\0';
		i = 0;
		Execute_Command_SCI0(command);
	} 
	else 
	{
		command[i] = rc;
		i++;
	}
		
//	SCI0DRL = rc;
}

//串口1中断
interrupt void SCI1_ISR(void)
{
	uchar rc = 0;
	rc = SCI1SR1; /* dummy read to clear flags */
	rc = SCI1DRL; /* data read */
}


static void Write_To_SCI0(const char *text)//输出字符串
{
	ulong error_count = 0;
	while (*text != '\0')
	{
		SCI0DRL = *text++;
		
		while (!(SCI0SR1 & 0x80))	// wait for output buffer empty 
		{
			error_count++;
			if(error_count >= TIME_OUT)//操作超时
				break;
		}  
		error_count = 0;		
	}
	
	SCI0DRL = '\0';
	while (!(SCI0SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;	
}

void Write_To_SCI0_DATA(uint data)//把数字转化为数字字符
{
	ulong error_count = 0;
	char i,temp = 0;
	
	for(i=12;i>=0;i = i-4)
	{
		temp = (data>>i)&0x000F;
		SCI0DRL = (temp<10 ? temp+48 : temp+55);
		
		while (!(SCI0SR1 & 0x80))	// wait for output buffer empty 
		{
			error_count++;
			if(error_count >= TIME_OUT)//操作超时
				break;
		}  
		error_count = 0;
	}	
}

void Write_To_SCI0_DATA_ASCII(uint data)//发送数字！！！先发送高8位
{
	ulong error_count = 0;

	SCI0DRL = data>>8;
	
	while (!(SCI0SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;
	
	SCI0DRL = data;
	
	while (!(SCI0SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;

}


static void Write_To_SCI1(const char *text)//输出字符串
{
	ulong error_count = 0;
	while (*text != '\0')
	{
		SCI1DRL = *text++;
		
		while (!(SCI1SR1 & 0x80))	// wait for output buffer empty 
		{
			error_count++;
			if(error_count >= TIME_OUT)//操作超时
				break;
		}  
		error_count = 0;		
	}
	
	SCI1DRL = '\n';
	while (!(SCI1SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;	
}

void Write_To_SCI1_DATA(uint data)//把数字转化为数字字符
{
	ulong error_count = 0;
	char i,temp = 0;
	
	for(i=12;i>=0;i = i-4)
	{
		temp = (data>>i)&0x000F;
		SCI1DRL = (temp<10 ? temp+48 : temp+55);
		
		while (!(SCI1SR1 & 0x80))	// wait for output buffer empty 
		{
			error_count++;
			if(error_count >= TIME_OUT)//操作超时
				break;
		}  
		error_count = 0;
	}	
}

void Write_To_SCI1_DATA_ASCII(uint data)//发送数字！！！先发送高8位
{
	ulong error_count = 0;

/*	SCI1DRL = data>>8;
	
	while (!(SCI1SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;*/
	
	SCI1DRL = data;
	
	while (!(SCI1SR1 & 0x80))	// wait for output buffer empty 
	{
		error_count++;
		if(error_count >= TIME_OUT)//操作超时
			break;
	}  
	error_count = 0;

}