16c550.c

uc/fs文件系统

/*
*****************************************************************************************
* Name			:UART.C 																									
* Date			:2004.1.2		
* Modified by	:Avirl																								
* Fuctions     :UART_Initialize() UART_Init()  TxQInit() RxQInit() Uart0isr() Uart1isr()
*				 UARTTxIntOn() UARTRxIntOn() UARTTxIntOff() UARTRxIntOff() TxQWr()	RxQRd()	
*				 Uart_SendByte() Uart_SendString() Uart_Printf()  getch() i_getc() kbhit()															 			 
******************************************************************************************
*/
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#include "conreg.h"
#include "uart.h"
#include "irq.h"
#include "16C550.h"
#include "pio.h"

extern unsigned long MS_TIMER;
extern void delay(int ms);

void  UART16C550_Init(void)
{
	
	UART16C550_FCR = 0x06;
	UART16C550_IER = 0x01;
	
	UART16C550_LCR = 0x80;
	UART16C550_DLL = 0x0C;
	UART16C550_DLM = 0x00;
	
	UART16C550_LCR = 0x03;
	UART16C550_MCR = 0x00;
	
}


void  UART16C550_SendChar(char c)
{
	char t;
	do{
		t = UART16C550_LSR;
	}while((t & 0x40)==0);
	
	UART16C550_THR = c;
}


void  UART16C550_SendStr(char *str, uint8 strlen)
{
	unsigned int k = 0;
	do{
		UART16C550_SendChar(*(str + k));
		k++;
	}while(k < strlen);
}

void  UART16C550_Puts(char *str)
{
	while(*str)
	UART16C550_SendChar(*str++);
	//UART16C550_SendStr(str, strlen(str));
}

int  UART16C550_Expect(char *expect_string, unsigned long timeout)
{
	uint expect_length, match_position;
	unsigned long t;
	int received;
		
	expect_length = strlen(expect_string);
	match_position = 0;

	while(match_position < expect_length)
	{
		t = MS_TIMER;
		while((received = UART16C550_GetChar()) == 0xFF)
		{
			if(MS_TIMER - t > timeout)
			{
				return 0;		//timed out
			}
		}
		//if(MODEM_DEBUG)
		//{
		//	Uart_Printf("received");
		//}
		if(received == expect_string[match_position])
		{
			match_position++;
		}
		else
		{
			match_position = 0; //no match, start over
		}
	}
	return 1;		
}


int  UART16C550_GetChar(void)
{
	int  t;
	int   c;
	t = UART16C550_LSR;
	if((t & 0x01)==0x01)
	{
		c = UART16C550_RBR;
		return(c);
	}
	//c = UART16C550_RBR;
	//return(c);
	return(0xFF);
}

void  UART16C550_isr_receive(void)
{
	int i,c;
	c = UART16C550_RBR;
	PIO_Set_Low(18);
	for(i=0; i<50000;i++);
	//delay(200);
	PIO_Set_High(18);
    //i = UART16C550_GetChar();
   	if(c==80)
   	{
   			PIO_Set_Low(17);
   			//delay(200);
   			//PIO_Set_High(17);
   			//delay(100);
   	}
}