dispcust.c

ESS3890+SL原代码（1*16内存）

/* Copyright 1997, ESS Technology, Inc.                                 */
/* SCCSID @(#)dispcust.c	4.3 11/26/02 */

/*
 * $Log$
 */

#include "vcxi.h"
#include "display.h"
#include "dsa.h"
#include "const.h"

/****************************************************************************
 Customed display initialisation.
 ****************************************************************************/
void cust_disp_init(void)
{
#ifdef DSC
    DSC_init();
#endif

    DISP_set_filter(filter_sharp, filter_sharp);

#if NOT_USED
    /* detect the TV mode */
    PREPARE_DETECTION;
    DISP_set_TV_mode((DETECT_NTSC) ? TV_NTSC : TV_PAL);
#endif

    DISP_set_TV_mode(TV_PAL); /* power-up in PAL mode */
    DISP_field_detect = 0;
    vcx_scn_outputcntl = 0x10400;	/* 8b YUV, encoder drives clock	*/
    vcx_scn_counter_ctl = 0x16;		/* Non MasterModeSyncs		*/
}

/****************************************************************************
 Customed screen parameter initialisation.
 ****************************************************************************/
void cust_change_scn_parameters(int height)
{
    if (height == 240) {		/* NTSC */

	vcx_scn_display_rate	= 60;
	vcx_scn_height		= 240;

	/* horizontal timing */
	vcx_scn_hstart		= 127;
	vcx_scn_hsyncperiod	= 858;

	/* vertical timing */
	vcx_scn_vbendval	= 16;
	vcx_scn_vstart		= 16;
	vcx_scn_vbstartval	= 260;
	vcx_scn_vsyncperiod	= 262;

	SET_ENCODER_NTSC;

    } else {					/* PAL */

	vcx_scn_display_rate	= 50;
	vcx_scn_height		= 288;

	/* horizontal timing */
	vcx_scn_hstart		= 135;
	vcx_scn_hsyncperiod	= 864;

	/* vertical timing */
	vcx_scn_vbendval	= 3;
	vcx_scn_vstart		= 18;
	vcx_scn_vbstartval	= 312;
	vcx_scn_vsyncperiod	= 312;

	SET_ENCODER_PAL;
    }

    DISP_field_swap = DISP_field_detect ^ (height == 288);
}