glcd.c

FFT转换程序

/*! \file glcd.c \brief Graphic LCD API functions. */
//*****************************************************************************
//
// File Name	: 'glcd.c'
// Title		: Graphic LCD API functions
// Author		: Pascal Stang - Copyright (C) 2002
// Date			: 5/30/2002
// Revised		: 5/30/2002
// Version		: 0.5
// Target MCU	: Atmel AVR
// Editor Tabs	: 4
//
// NOTE: This code is currently below version 1.0, and therefore is considered
// to be lacking in some functionality or documentation, or may not be fully
// tested.  Nonetheless, you can expect most functions to work.
//
// This code is distributed under the GNU Public License
//		which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#include <avr/io.h>
#include <avr/pgmspace.h>

#include "glcd.h"

// include hardware support
#include "st7565p.h"
// include fonts
#include "font5x7.h"
#include "fontgr.h"

// draw line
void glcdLine(u08 x, u08 val)
{
	u08 temp = 8;
	if (val > 64) val =  64;

	while (val > 8)
	{
		glcdSetAddress(x, temp - 1);
		glcdDataWrite(0xFF);
		temp--;
		val -= 8;
	}

	glcdSetAddress(x, temp - 1);
	switch (val)
	{
		case 0 : glcdDataWrite(0x00); break;
		case 1 : glcdDataWrite(0x80); break;
		case 2 : glcdDataWrite(0xC0); break;
		case 3 : glcdDataWrite(0xE0); break;
		case 4 : glcdDataWrite(0xF0); break;
		case 5 : glcdDataWrite(0xF8); break;
		case 6 : glcdDataWrite(0xFC); break;
		case 7 : glcdDataWrite(0xFE); break;
		case 8 : glcdDataWrite(0xFF); break;
	}
	temp--;

	while (temp > 0)
	{
		glcdSetAddress(x, temp -1);
		glcdDataWrite(0x00);
		temp--;
	}

}

// text routines

// write a character at the current position
void glcdWriteChar(unsigned char c)
{
	u08 i = 0;

	for(i=0; i<5; i++)
	{
		glcdDataWrite(pgm_read_byte(&Font5x7[((c - 0x20) * 5) + i]));
	}

	// write a spacer line
	glcdDataWrite(0x00);
	// unless we're at the end of the display
	//if(xx == 128)
	//	xx = 0;
	//else 
	//	glcdWriteData(0x00);

	//cbi(GLCD_Control, GLCD_CS1);
	//cbi(GLCD_Control, GLCD_CS2);
	glcdStartLine(0);
}

void glcdWriteCharGr(u08 grCharIdx)
{
	u08 idx;
	u08 grLength;
	u08 grStartIdx = 0;

	// get starting index of graphic bitmap
	for(idx=0; idx<grCharIdx; idx++)
	{
		// add this graphic's length to the startIdx
		// to get the startIdx of the next one
		grStartIdx += pgm_read_byte(FontGr+grStartIdx);
	}
	grLength = pgm_read_byte(FontGr+grStartIdx);

	// write the lines of the desired graphic to the display
	for(idx=0; idx<grLength; idx++)
	{
		// write the line
		glcdDataWrite(pgm_read_byte(FontGr+(grStartIdx+1)+idx));
	}
}

void glcdPutStr(unsigned char *data)
{
  while (*data) {
    glcdWriteChar(*data);
    data++;
  }
}