140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
|
|
File: input.c
|
|
|
|
Contains: This file contains the hardware specific user input routines for backlight control.
|
|
|
|
Written by: Andy Gong x6595
|
|
|
|
Copyright: © 1991-1992 by Apple Computer, Inc. All rights reserved.
|
|
|
|
This file is used in these builds: ROM
|
|
|
|
Change History (most recent first):
|
|
|
|
<SM1> 2/11/93 CSS Checked in from Horror.
|
|
<1> 6/30/92 ag new today
|
|
*/
|
|
|
|
/*page*/
|
|
/************************************/
|
|
/*** INCLUDE FILES DECLARATIONS ***/
|
|
|
|
|
|
#include <SysEqu.h>
|
|
#include <types.h>
|
|
#include <errors.h>
|
|
|
|
#include "PowerMgr.h"
|
|
#include "backlight.h"
|
|
|
|
|
|
|
|
#define READ_ATOD_CHANNEL 0xD8
|
|
#define READ_BUTTON_VALUE 0xD9
|
|
|
|
extern short PotInputRangeShiftTblPWM[];
|
|
|
|
/*page
|
|
***************************************************************************************************
|
|
*
|
|
*
|
|
***************************************************************************************************
|
|
*/
|
|
|
|
unsigned char Get_AtoD(int channel)
|
|
{
|
|
PMgrPBlock pb; /* power manager pb */
|
|
char atodChannel; /* a to d channel to read [0-8] */
|
|
unsigned char value; /* return value */
|
|
OSErr error; /* pmgr error */
|
|
|
|
|
|
atodChannel = channel; /* load channel value into buffer */
|
|
|
|
pb.pmgrCmd = READ_ATOD_CHANNEL; /* load read channel command */
|
|
pb.pmgrCnt = 1; /* transmit buffer count is 1 byte */
|
|
pb.pmgrXPtr = &atodChannel; /* pointer to transmit buffer */
|
|
pb.pmgrRPtr = &value; /* pointer to receive buffer */
|
|
|
|
error = PMgr(&pb);
|
|
|
|
return( (error) ? 0 : value);
|
|
};
|
|
|
|
/*page
|
|
***************************************************************************************************
|
|
*
|
|
*
|
|
***************************************************************************************************
|
|
*/
|
|
|
|
unsigned char Get_PGEButton(int channel)
|
|
{
|
|
PMgrPBlock pb; /* power manager pb */
|
|
char atodChannel; /* a to d channel to read [0-8] */
|
|
unsigned char value; /* return value */
|
|
OSErr error; /* pmgr error */
|
|
|
|
|
|
atodChannel = channel; /* load channel value into buffer */
|
|
|
|
pb.pmgrCmd = READ_BUTTON_VALUE; /* load read channel command */
|
|
pb.pmgrCnt = 1; /* transmit buffer count is 1 byte */
|
|
pb.pmgrXPtr = &atodChannel; /* pointer to transmit buffer */
|
|
pb.pmgrRPtr = &value; /* pointer to receive buffer */
|
|
|
|
error = PMgr(&pb);
|
|
|
|
return( (error) ? 0 : value);
|
|
};
|
|
|
|
/*page
|
|
***************************************************************************************************
|
|
*
|
|
*
|
|
***************************************************************************************************
|
|
*/
|
|
unsigned char GetPortableValues(int parameter)
|
|
{
|
|
|
|
PMgrPBlock pb; /* power manager pb */
|
|
OSErr err; /* power manager error */
|
|
unsigned char rbuf[3]; /* buffer for send command */
|
|
|
|
pb.pmgrCmd = BatteryStatusImmCmd; /* on old pmgr, read battery status (immediate not averaged) */
|
|
pb.pmgrCnt = 0;
|
|
pb.pmgrXPtr = nil;
|
|
pb.pmgrRPtr = rbuf;
|
|
|
|
err = PMgr(&pb);
|
|
return( (err) ? 0 : rbuf[parameter]); /* return 0 if error, else read value */
|
|
}
|
|
|
|
/*page
|
|
***************************************************************************************************
|
|
*
|
|
*
|
|
***************************************************************************************************
|
|
*/
|
|
int PotControl (driverGlobalPtr globalPtr)
|
|
|
|
{
|
|
#pragma unused (globalPtr)
|
|
|
|
unsigned int potvalue;
|
|
|
|
potvalue = (* (intFunction)(globalPtr->hardwareDependentPtr))();
|
|
|
|
if (abs(globalPtr->lastatod - potvalue) <= 5) /* was the change less than 100mv */
|
|
potvalue = globalPtr->lastatod; /* is less than, the use old value */
|
|
|
|
globalPtr->lastatod = potvalue; /* update last a to d value */
|
|
potvalue >>= 3; /* scale to 0 to 31 */
|
|
if (potvalue) /* if non-zero, check for subrange limiting */
|
|
{
|
|
potvalue >>= PotInputRangeShiftTblPWM[globalPtr->powerRange]; /* rescale in low power levels */
|
|
if (!potvalue) potvalue = 1; /* make sure we don't change the backlight state */
|
|
};
|
|
return(potvalue);
|
|
};
|