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/* ---------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
//-----------------------------------------------------------------------------
// Headers
//-----------------------------------------------------------------------------
#include "s7lstklcd.h"
#include "font.h"
#include <board.h>
#include <utility/assert.h>
#include <utility/trace.h>
//-----------------------------------------------------------------------------
// Global functions
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
/// Switches a pixel on the SLCD on or off.
/// \param x X-coordinate of pixel.
/// \param y Y-coordinate of pixel.
/// \param set If 1, pixel is displayed; otherwise it is hidden.
//-----------------------------------------------------------------------------
void S7LSTKLCD_Pixel(unsigned char x, unsigned char y, unsigned char set)
{
unsigned int symbol = y * S7LSTKLCD_WIDTH + x;
unsigned int common = symbol / S7LSTKLCD_NUM_SEGMENTS;
unsigned int segment = symbol % S7LSTKLCD_NUM_SEGMENTS;
unsigned int reg = segment / 32;
unsigned int bit = segment % 32;
SANITY_CHECK(x < S7LSTKLCD_WIDTH);
SANITY_CHECK(y < S7LSTKLCD_HEIGHT);
if (set) {
AT91C_BASE_SLCDC->SLCDC_MEM[common * 2 + reg] |= (1 << bit);
}
else {
AT91C_BASE_SLCDC->SLCDC_MEM[common * 2 + reg] &= ~(1 << bit);
}
}
//-----------------------------------------------------------------------------
/// Displays a character at the given position on the SLCD. The character is
/// clipped according to the SLCD dimensions.
/// Note that x and y can be negative (upper-left part of character will be
/// clipped).
/// \param x X-coordinate of upper-left corner of character.
/// \param y Y-coordinate of upper-left corner of character.
/// \param c Character to display.
//-----------------------------------------------------------------------------
void S7LSTKLCD_Char(signed int x, signed int y, unsigned char c)
{
const unsigned char *pChar;
signed int i, j;
SANITY_CHECK(c >= gFont.firstCharacter);
SANITY_CHECK(c <= gFont.lastCharacter);
// Optimization: return if coordinates are out of bounds
if ((x > S7LSTKLCD_WIDTH) || ((x+gFont.width) < 0)
|| (y > S7LSTKLCD_HEIGHT) || ((y+gFont.height) < 0)) {
return;
}
// Get pointer to character in font data
pChar = &(gFont.pData[(c - gFont.firstCharacter) * gFont.height]);
// Display character at requested location
for (j=0; j < gFont.height; j++) {
for (i=0; i < gFont.width; i++) {
if (((x+i) >= 0) && ((x+i) < S7LSTKLCD_WIDTH)
&& ((y+i >= 0)) && ((y+i) < S7LSTKLCD_HEIGHT)) {
S7LSTKLCD_Pixel(x+i, y+j, (pChar[j] & (1 << (FONT_CHAR_MAX_WIDTH-i-1))));
}
}
}
}
//-----------------------------------------------------------------------------
/// Displays a string on the SLCD given the top-left corner coordinates. String
/// is clipped according to the SLCD dimensions.
/// X and Y can be negative (top-left clipping).
/// \param x X-coordinate of top-left corner.
/// \param y Y-coordinate of top-left corner.
/// \param pString String to display.
//-----------------------------------------------------------------------------
void S7LSTKLCD_String(signed int x, signed int y, const char *pString)
{
signed int j;
while (*pString != 0) {
// Display character
S7LSTKLCD_Char(x, y, *pString);
x += gFont.width + 1;
pString++;
// Vertical blank line
if ((*pString != 0) && ((x-1) < S7LSTKLCD_WIDTH) && ((x-1) > 0)) {
for (j=0; j < gFont.height; j++) {
if (((j+y) >= 0) && ((j+y) < S7LSTKLCD_HEIGHT)) {
S7LSTKLCD_Pixel(x-1, y+j, 0);
}
}
}
}
}
//-----------------------------------------------------------------------------
/// Returns the height and width in pixels of the given string.
/// \param pString String to examinate.
/// \param pWidth Width of string in pixels.
/// \param pHeight Height of string in pixels.
//-----------------------------------------------------------------------------
void S7LSTKLCD_GetStringSize(
const char *pString,
signed int *pWidth,
signed int *pHeight)
{
unsigned int size = 0;
// Get string size
while (*pString != 0) {
size++;
pString++;
}
// Return size in pixel
if (pWidth) {
*pWidth = size * (gFont.width + 1) - 1;
}
if (pHeight) {
*pHeight = gFont.height;
}
}
//-----------------------------------------------------------------------------
/// Displays the given string on the SLCD, centered along the X and Y axis
/// (this may result in the string being clipped).
/// \param pString String to display.
//-----------------------------------------------------------------------------
void S7LSTKLCD_PutString(const char *pString)
{
signed int width, height;
SANITY_CHECK(pString);
S7LSTKLCD_GetStringSize(pString, &width, &height);
S7LSTKLCD_String((S7LSTKLCD_WIDTH - width) / 2, (S7LSTKLCD_HEIGHT - height) / 2, pString);
}
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