k0r_sfr_set.c

NEC单片机的一些参考源码

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;														
;    NEC Electronics	78K0R/Kx3 Series									
;丂丂														
;亂License Agreement亃
;. This sample program is subject to change without notice.
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;  property rights of third parties by or arising from the use of this sample program. No license, express,
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;  illustrative purposes in semiconductor product operation and application examples. The incorporation of
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;  the customer. NEC Electronics assumes no responsibility for any losses incurred by customers or third parties
;  arising from the use of this sample program.
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;丂Please use this sample program under the agreement listed above.
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;***************************************************************************************************************
;	78K0R/Kx3 Series	sample program								
;***************************************************************************************************************
;	A/D Converter (SFR Setting)
;***************************************************************************************************************
; [History]
;	2007.07 new
;***************************************************************************************************************/

/***************************************************************************
*	Title: SFR setting
***************************************************************************
*  Condition:
*	device: uPD78F1166
*	AVREF0 = 5V
*  	analog input: ANI14/P156, ANI15/P157
*  	digital input: ANI0/P20-ANI13/P155
***************************************************************************/

#pragma	sfr					/* definition for using SFR */
#pragma	NOP					/* definition for using NOP */

void SAD_INIT(void);
void SAD_CSTT(void);
void SAD_CSTP(void);

/***************************************************************************
*	variable declaration
***************************************************************************/
unsigned int AD_VALUE;				/* A/D conversion result */

/***************************************************************************
*	Title:	initial setting of A/D converter
****************************************************************************
*	Module:	void SAD_INIT(void)
*	Arg:
*	Ret:
***************************************************************************/
void SAD_INIT(void)
{

	ADCEN = 1;			/* supplies input clock to A/D converter */

	ADCE = 1;			/* enables comparator operation */

	ADPC = 0b00001110;		/* A/D port configuration
					   analog input: ANI14/P156, ANI15/P157
					   digital input: ANI0/P20-ANI13/P155 */

	/**************************************************
	 port initial setting */
	PM2 = 0b00000000; 		/* P20-P27: output mode */
	PM15 = 0b11000000;		/* ANI15/P157 & ANI14/P156: input mode */

	/**************************************************
	 A/D conversion mode register */
	ADM = 0b00000001;		/* ADCS=0: stops conversion operation
					   FR2=FR1=FR0=LV1=LV0=0: conversion time = 264/fCLK @20MHz
					   ADCE=1: enables comparator operation */

	ADS = 0x0e;			/* analog input channel: ANI14/P156 */

	ADCS = 1;			/* enables conversion operation */

	ADIF = 0;			/* clear interrupt request flag of INTAD */

	while(ADIF == 0);		/* wait until A/D conversion completes */

	AD_VALUE = ADCR;		/* get A/D conversion result (16-bit with lower 6-bit '0') */

}

/***************************************************************************
*	Title: channel change (ANI14 --> ANI15)
****************************************************************************
*	Module:	void SAD_CHAN(void)
*	Arg:
*	Ret:
***************************************************************************/
void SAD_CHAN(void)
{
	ADS = 0x0f;			/* analog input channel: ANI15/P157 */

	ADCS = 1;			/* enables conversion operation */

	ADIF = 0;			/* clear interrupt request flag of INTAD */

	while(ADIF == 0);		/* wait until A/D conversion completes */

	AD_VALUE = ADCRH;		/* get A/D conversion result (16-bit with lower 6-bit '0') */

}

/***************************************************************************
*	Title:	A/D conversion operation stop
****************************************************************************
*	Module:	void SAD_STOP(void)
*	Arg:
*	Ret:
***************************************************************************/
void SAD_STOP(void)
{
	ADCS = 0;			/* stops conversion operation */

	ADCE = 0;			/* stops comparator operation */

	ADCEN = 0;			/* stops supply of input clock */

}