uart0.c

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//-----------------------------------------------------------------------------
// uart0.c
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <reg52.h>
#include "cpu/cpu.h"
#include "rfid/card.h"
#include "misc/general.h"
#include "config/config.h"
//-----------------------------------------------------------------------------
// Constants Define
//-----------------------------------------------------------------------------
#define UART0_BAUD        19200          // 6T
//-----------------------------------------------------------------------------
// Function Prototype
//-----------------------------------------------------------------------------
void Uart0_Send_Byte    ( char c );
char Uart0_Receive_Byte ( void );
//-----------------------------------------------------------------------------
// Uart0 Send Routine
//-----------------------------------------------------------------------------
void Uart0_Send_Byte ( char c )
{
		#if Txd0_Oneness
			c = Oneness_CHAR;
		#endif	
		#if Txd0_LEDOn
			cpu_LED_On;
		#endif
	TI = CLEAR;
	SBUF = c;
	while ( !TI );
	TI = CLEAR;
		#if Txd0_LEDOn
			cpu_LED_Off;
		#endif
}
//-----------------------------------------------------------------------------
// Uart0 Receive Form I Routine
//-----------------------------------------------------------------------------
char Uart0_Receive_Byte ( void )
{
	long i = ICC_RXDPICK_TIME;
	char rtn = 0xFF;

	do {
		if ( RI )
		{
				#if Rxd0_LEDOn
					cpu_LED_On;
				#endif
		 	RI = CLEAR;
			rtn = SBUF;
				#if Rxd0_LEDOn
					cpu_LED_Off;
				#endif
			break;
		}
		if (( i & 0x0FF ) == 0xFF ) Clear_Dog;
	} while ( --i );
	return rtn;
}