t6963.c

source code for a sample alarm control panel system using Freescale MC9S12DP256 . The project was im

//=============================================================================
// File: T6963.C - V1.00
// Rem.: The ACPRD Project Page on the Web -> http://hc12web.de/acprd
//=============================================================================

//-- Includes -----------------------------------------------------------------

#include "datatypes.h"
#include "hcs12dp256.h"
#include "t6963.h"

//-- Defines ------------------------------------------------------------------

// Status bits
#define T6963_STA0		0x01			// T6963 Status Bit STA0
#define T6963_STA1		0x02			// T6963 Status Bit STA1
#define T6963_STA2		0x04			// T6963 Status Bit STA2
#define T6963_STA3		0x08			// T6963 Status Bit STA3

//-- Static Vars --------------------------------------------------------------

//-- Code ---------------------------------------------------------------------

UINT8 _statT6963(void) {

	UINT8 status;

	T6963_DDDR = 0x00;					// data lines all input
	T6963_CPORT &= ~(T6963_RD | T6963_CE);
	// tACC min 150ns
	NOP();
	NOP();
	NOP();
	status = T6963_DPORT;
	T6963_CPORT |= T6963_RD | T6963_CE;
	T6963_DDDR = 0xff;					// back to output
	return status;
	}

//-----------------------------------------------------------------------------

void _cmdT6963(UINT8 cmd) {

	// status check - no loop time limit!!
	while(~_statT6963() & (T6963_STA0 | T6963_STA1)) ;
	//
	T6963_DPORT = cmd;
	T6963_CPORT &= ~(T6963_WR | T6963_CE);
	// tCE min 80ns
	T6963_CPORT |= T6963_WR | T6963_CE;
	}

//-----------------------------------------------------------------------------

void _datT6963(UINT8 dat) {

	// status check - no loop time limit!!
	while(~_statT6963() & (T6963_STA0 | T6963_STA1)) ;
	//
	T6963_DPORT = dat;
	T6963_CPORT &= ~T6963_CD;
	T6963_CPORT &= ~(T6963_WR | T6963_CE);
	// tCE min 80ns
	T6963_CPORT |= T6963_WR | T6963_CE;
	// tCDH min 10ns
	T6963_CPORT |= T6963_CD;
	}

//-----------------------------------------------------------------------------

void _writeBlockT6963(const UINT8 *src, UINT16 mode, UINT16 addr, UINT16 size) {

	UINT16 i;
	UINT8 c, sta3;

	// Address Pointer Set
	_datT6963(addr & 0xff);
	_datT6963(addr >> 8);
	_cmdT6963(0x24);
	// Data Auto Write Set
	_cmdT6963(0xb0);
	// Transfer screen buffer
	i = size;
	do {
		// status check - no loop time limit!!
		T6963_DDDR = 0x00;				// data lines all input
		do {
			T6963_CPORT &= ~(T6963_RD | T6963_CE);
			// tACC min 150ns
			NOP();
			NOP();
			NOP();
			sta3 = T6963_DPORT & T6963_STA3;
			T6963_CPORT |= T6963_RD | T6963_CE;
			} while(sta3 == 0);
		T6963_DDDR = 0xff;				// back to output
		//
		switch(mode) {
			case T6963_TEXTMODE:
				src++;
				c = *src;
				if(c < 0x80) c -= 0x20;
				T6963_DPORT = c;
				break;
			case T6963_ATTRMODE:
				T6963_DPORT = *src;
				src++;
				break;
			default: // T6963_RAWMODE
				T6963_DPORT = *src;
				break;
			}
		T6963_CPORT &= ~(T6963_CD | T6963_WR | T6963_CE);
		// tCD min 120ns, tCE min 80ns
		src++;
		T6963_CPORT |= T6963_WR | T6963_CE;
		// tCDH min 10ns
		T6963_CPORT |= T6963_CD;
		} while(--i);
	// Auto Reset
	// status check - no loop time limit!!
	while(~_statT6963() & T6963_STA3) ;
	T6963_DPORT = 0xb2;
	T6963_CPORT &= ~(T6963_WR | T6963_CE);
	// tCE min 80ns
	T6963_CPORT |= T6963_WR | T6963_CE;
	}

//-----------------------------------------------------------------------------

void initT6963(const UINT8 *font) {

	T6963_CPORT |= T6963_WR | T6963_RD | T6963_CE | T6963_CD;
	T6963_CDDR  |= T6963_WR | T6963_RD | T6963_CE | T6963_CD;
	T6963_DPORT = 0x00;
	T6963_DDDR  = 0xff;
	// Text Home Address Set
	_datT6963(T6963_TBASE & 0xff);
	_datT6963(T6963_TBASE >> 8);
	_cmdT6963(0x40);
	// Text Area Set (Bytes per Display Line)
	_datT6963(T6963_TCOLS & 0xff);
	_datT6963(T6963_TCOLS >> 8);
	_cmdT6963(0x41);
	// Graphic Home Address Set
	_datT6963(T6963_GBASE & 0xff);
	_datT6963(T6963_GBASE >> 8);
	_cmdT6963(0x42);
	// Graphic Area Set (Bytes per Display Line)
//	_datT6963(T6963_GCOLS & 0xff);
//	_datT6963(T6963_GCOLS >> 8);
	// Text Attribute Area Set (Bytes per Display Line)
	_datT6963(T6963_TCOLS & 0xff);
	_datT6963(T6963_TCOLS >> 8);
	_cmdT6963(0x43);
	// Mode Set (EXOR, int.CG)
//	_cmdT6963(0x81);
	// Mode Set (Text attribute mode, int.CG)
	_cmdT6963(0x84);
	// Display Mode (Text=1 Graph=0 Curs=0)
//	_cmdT6963(0x94);
	// Display Mode (Text=1 Graph=1 Curs=0)
	_cmdT6963(0x9c);
	// install user supplied font (upper half only)
	if(font) {
		// Offset Register Set
		_datT6963(T6963_CGBASE >> 11);
		_datT6963(0x00);
		_cmdT6963(0x22);
		_writeBlockT6963(font, T6963_RAWMODE, T6963_CGBASE + 0x0400, T6963_CGSIZE / 2);
		}
	}

//-----------------------------------------------------------------------------

void refreshT6963c(void *tbuf) {

	_writeBlockT6963((UINT8 *)tbuf, T6963_TEXTMODE, T6963_TBASE, T6963_TSIZE);
	}

void refreshT6963a(void *tbuf) {

	_writeBlockT6963((UINT8 *)tbuf, T6963_ATTRMODE, T6963_GBASE, T6963_TSIZE);
	}

//=============================================================================