ad1utl.c

一个瑞萨单片机的程序。。。供大家学习用。。。。。。。。。。。。。。。。。。

/*""FILE COMMENT""*************************************************************
*  System Name : for eduction (NO TRANSFERRING)
*  File Name   : ad1utl.c
*  Contents    : A-D conversion
*  Model       : for OAKS8-LCD Board
*  CPU         : R8C/Tiny series
*  Compiler    : NC30WA(V.5.30 Release 1)
*  OS          : not be used 
*  Programer   : RENESAS Semiconductor Training Center
*  Note        : for OAKS8-R5F21114FP(R8C/11 group,20MHz) 
*******************************************************************************
* COPYRIGHT(C) 2004 RENESAS TECHNOLOGY CORPORATION
* AND RENESAS SOLUTIONS CORPORATION ALL RIGHTS RESERVED
*******************************************************************************
* History      : ---
*""FILE COMMENT END""*********************************************************/

/*===== include file =====*/
#include "defs.h"						/* common symbol definition			*/
#include "target.h"						/* SFR section definition file		*/
#include "ad1utl.h"						/* header file for A-D conversion control	*/

/*===== define function prototype =====*/

/*===== define variable =====*/
static int init_hard;					/* hardware initialization management variable */
										/* 0:not be initialized丄1:initialized	 */

/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : void AD1__initialize(void)
* function        : initialization for A-D conversion
* parameter       : none
* return          : none
* function used   : none
* notice          : 
* History         : 
*""FUNC COMMENT END""*********************************************************/
void AD1__initialize(void)
{
	init_hard = TRUE;					/* A-D conversion "initialized"			 */

	adcon0 = 0x89;						/* set AD control register 0		 */
										/* 10001001							 */
										/* |||||+++ select AN1 port			 */
										/* ||||+--- loop mode			 */
										/* |||+---- select port P0 group	 */
										/* ||+----- reservation bit				 */
										/* |+------ stop A-D conversion		 */
										/* +------- fAD 2 frequency division	 */
	adcon1 = 0x28;						/* set A-D control register 1		 */
										/* 00101000							 */
										/* |||||+++ reservation bit		 */
										/* ||||+--- 10 bits mode		 */
										/* |||+---- enable CKS0 bit		 */
										/* ||+----- connect Vref			 */
										/* ++------ reservation bit				 */
	adcon2 = 0x01;						/* set A-D control register 2		 */
										/* 00000001							 */
										/* |||||||+ have sample & hold	 */
										/* +++++++- reservation bit				 */
	adst = 1;							/* start A-D conversion				 */
}


/*""FUNC COMMENT""*************************************************************
* ID             : ---
* function name  : int AD1__getad1(void)
* function       : get A-D conversion result
* parameter      : none
* return         : int  ; A-D conversion result
* function used  : none
* notice         : ad register consists of 16 bits, if to get A-D conversion
*                : result of 10 bits solution, must mask 6 bits from b15 to b10
* History        : 
*""FUNC COMMENT END""*********************************************************/
int AD1__getad1(void)
{
	if(init_hard){						/* if initialized				 */
		return ad;						/* return result						 */
	}
										/* if not initialized					 */
	return ERR;							/* return error					 */
}


/* #############################################################################
 * ###	private function
 */


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    end of file
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