lvi.c

nec 78K0 样例对程序初始化电表样

/*
*******************************************************************************
**
**  This device driver was created by Applilet for the 78K0/KB2, 78K0/KC2,
**  78K0/KD2, 78K0/KE2 and 78K0/KF2 8-Bit Single-Chip Microcontrollers.
**
**  Copyright(C) NEC Electronics Corporation 2002 - 2005
**  All rights reserved by NEC Electronics Corporation.
**
**  This program should be used on your own responsibility.
**  NEC Electronics Corporation assumes no responsibility for any losses
**  incurred by customers or third parties arising from the use of this file.
**
**  Filename :	lvi.c
**  Abstract :	This file implements device driver for LVI module.
**  APIlib :	NEC78K0KX2.lib V1.01 [09 Aug. 2005]
**
**  Device :	uPD78F0513(44-pin)
**
**  Compiler :	NEC/CC78K0
**
*******************************************************************************
*/
/*
*******************************************************************************
** Include files
*******************************************************************************
*/
#include "macrodriver.h"
#include "lvi.h"

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
**  	This function initializes the Low-Voltage Detector.
**
**  Parameters:
**  	None
**
**  Returns:
**  	None
**
**-----------------------------------------------------------------------------
*/
void LVI_Init( void )
{
	USHORT i;
	
	LVION = 0;			/* stop LVI */
	LVISEL = 0;			/* detect supply voltage (VDD) */
	LVIMD = 0;			/* internal interrupt mode */
	LVIPR = 1;			/* low priority level */
	LVIIF = 0;
	LVIS = LVI_Level0;		/* compare with 4.20V */
 
	LVION = 1;			/* enable LVI */
	for(i=0; i<=100; i++){		/* wait 10 us */
		NOP();
	}
	LVIMK = 0;
}