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-rw-r--r--nanologger/PCD8544.cpp316
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diff --git a/nanologger/PCD8544.cpp b/nanologger/PCD8544.cpp
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--- a/nanologger/PCD8544.cpp
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-/*
- * PCD8544 - Interface with Philips PCD8544 (or compatible) LCDs.
- *
- * Copyright (c) 2010 Carlos Rodrigues <cefrodrigues@gmail.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-
-#include "PCD8544.h"
-
-#include <Arduino.h>
-#include <avr/pgmspace.h>
-
-extern const PROGMEM unsigned char font5x8[][5];
-
-/*
- * If this was a ".h", it would get added to sketches when using
- * the "Sketch -> Import Library..." menu on the Arduino IDE...
- */
-
-PCD8544::PCD8544(unsigned char sclk, unsigned char sdin,
- unsigned char dc, unsigned char reset,
- unsigned char sce):
- pin_sclk(sclk),
- pin_sdin(sdin),
- pin_dc(dc),
- pin_reset(reset),
- pin_sce(sce)
-{}
-
-
-void PCD8544::begin(unsigned char model)
-{
- this->column = 0;
- this->line = 0;
-
- // Sanitize the custom glyphs...
- memset(this->custom, 0, sizeof(this->custom));
-
- // All pins are outputs (these displays cannot be read)...
- pinMode(this->pin_sclk, OUTPUT);
- pinMode(this->pin_sdin, OUTPUT);
- pinMode(this->pin_dc, OUTPUT);
- pinMode(this->pin_reset, OUTPUT);
- pinMode(this->pin_sce, OUTPUT);
-
- // Reset the controller state...
- digitalWrite(this->pin_reset, HIGH);
- digitalWrite(this->pin_sce, HIGH);
- digitalWrite(this->pin_reset, LOW);
- delay(100);
- digitalWrite(this->pin_reset, HIGH);
-
- // Set the LCD parameters...
- this->send(PCD8544_CMD, 0x21); // extended instruction set control (H=1)
- this->send(PCD8544_CMD, 0x13); // bias system (1:48)
-
- if (model == CHIP_ST7576) {
- this->send(PCD8544_CMD, 0xe0); // higher Vop, too faint at default
- this->send(PCD8544_CMD, 0x05); // partial display mode
- } else {
- this->send(PCD8544_CMD, 0xc2); // default Vop (3.06 + 66 * 0.06 = 7V)
- }
-
- this->send(PCD8544_CMD, 0x20); // extended instruction set control (H=0)
- this->send(PCD8544_CMD, 0x09); // all display segments on
-
- // Clear RAM contents...
- this->clear();
-
- // Activate LCD...
- this->send(PCD8544_CMD, 0x08); // display blank
- this->send(PCD8544_CMD, 0x0c); // normal mode (0x0d = inverse mode)
- delay(100);
-
- // Place the cursor at the origin...
- this->send(PCD8544_CMD, 0x80);
- this->send(PCD8544_CMD, 0x40);
-}
-
-
-void PCD8544::stop()
-{
- this->clear();
- this->setPower(false);
-}
-
-
-void PCD8544::clear()
-{
- this->setCursor(0, 0);
-
- for (unsigned short i = 0; i < PCD8544_WIDTH * (PCD8544_HEIGHT/8); i++) {
- this->send(PCD8544_DATA, 0x00);
- }
-
- this->setCursor(0, 0);
-}
-
-
-void PCD8544::clearLine()
-{
- this->setCursor(0, this->line);
-
- for (unsigned char i = 0; i < PCD8544_WIDTH; i++) {
- this->send(PCD8544_DATA, 0x00);
- }
-
- this->setCursor(0, this->line);
-}
-
-
-void PCD8544::setPower(bool on)
-{
- this->send(PCD8544_CMD, on ? 0x20 : 0x24);
-}
-
-
-inline void PCD8544::display()
-{
- this->setPower(true);
-}
-
-
-inline void PCD8544::noDisplay()
-{
- this->setPower(false);
-}
-
-
-void PCD8544::setInverse(bool inverse)
-{
- this->send(PCD8544_CMD, inverse ? 0x0d : 0x0c);
-}
-
-
-void PCD8544::home()
-{
- this->setCursor(0, this->line);
-}
-
-
-void PCD8544::setCursor(unsigned char column, unsigned char line)
-{
- if (column > PCD8544_WIDTH) {
- column = 0;
- line++;
- }
- if (line > PCD8544_HEIGHT / 8)
- line = 0;
-
- this->column = column;
- this->line = line;
-
- this->send(PCD8544_CMD, 0x80 | column);
- this->send(PCD8544_CMD, 0x40 | line);
-}
-
-
-void PCD8544::createChar(unsigned char chr, const unsigned char *glyph)
-{
- // ASCII 0-31 only...
- if (chr >= ' ') {
- return;
- }
-
- this->custom[chr] = glyph;
-}
-
-
-size_t PCD8544::write(uint8_t chr)
-{
- // ASCII 7-bit only...
- if (chr >= 0x7f) {
- return 0;
- }
-
- if (chr == '\n') {
- column = 0;
- line = (line + 1) % (PCD8544_HEIGHT/9 + 1);
- return 0;
- } else if (chr == '\r') {
- column = 0;
- return 0;
- }
-
- const unsigned char *glyph;
- unsigned char pgm_buffer[5];
-
- if (chr >= ' ') {
- // Regular ASCII characters are kept in flash to save RAM...
- memcpy_P(pgm_buffer, &font5x8[chr - ' '], sizeof(pgm_buffer));
- glyph = pgm_buffer;
- } else {
- // Custom glyphs, on the other hand, are stored in RAM...
- if (custom[chr]) {
- glyph = custom[chr];
- } else {
- // Default to a space character if unset...
- memcpy_P(pgm_buffer, &font5x8[0], sizeof(pgm_buffer));
- glyph = pgm_buffer;
- }
- }
-
- // Output one column at a time...
- for (unsigned char i = 0; i < 5; i++) {
- this->send(PCD8544_DATA, glyph[i]);
- }
-
- // One column between characters...
- this->send(PCD8544_DATA, 0x00);
-
- // Update the cursor position...
- this->column = (this->column + 6) % PCD8544_WIDTH;
-
- if (this->column == 0) {
- this->line = (this->line + 1) % (PCD8544_HEIGHT/9 + 1);
- }
-
-#if ARDUINO >= 100
- return 1;
-#endif
-}
-
-void PCD8544::draw8x8(const unsigned char *data)
-{
- // Output one column at a time...
- for (unsigned char i = 0; i < 8; i++) {
- this->send(PCD8544_DATA, data[i]);
- }
- this->setCursor(column + 8, line);
-}
-
-void PCD8544::draw16x16(const unsigned char *data)
-{
- unsigned char scolumn = this->column;
- unsigned char sline = this->line;
- // Output one column at a time...
- for (unsigned char i = 0; i < 16; i++) {
- this->send(PCD8544_DATA, data[i]);
- }
- this->setCursor(scolumn, sline + 1);
- for (unsigned char i = 0; i < 16; i++) {
- this->send(PCD8544_DATA, data[i + 16]);
- }
- // Update the cursor position...
- this->setCursor(scolumn + 16, sline);
-}
-
-void PCD8544::drawColumn(unsigned char lines, unsigned char value)
-{
- unsigned char scolumn = this->column;
- unsigned char sline = this->line;
-
- // Keep "value" within range...
- if (value > lines*8) {
- value = lines*8;
- }
-
- // Find the line where "value" resides...
- unsigned char mark = (lines*8 - 1 - value)/8;
-
- // Clear the lines above the mark...
- for (unsigned char line = 0; line < mark; line++) {
- this->setCursor(scolumn, sline + line);
- this->send(PCD8544_DATA, 0x00);
- }
-
- // Compute the byte to draw at the "mark" line...
- unsigned char b = 0xff;
- for (unsigned char i = 0; i < lines*8 - mark*8 - value; i++) {
- b <<= 1;
- }
-
- this->setCursor(scolumn, sline + mark);
- this->send(PCD8544_DATA, b);
-
- // Fill the lines below the mark...
- for (unsigned char line = mark + 1; line < lines; line++) {
- this->setCursor(scolumn, sline + line);
- this->send(PCD8544_DATA, 0xff);
- }
-
- // Leave the cursor in a consistent position...
- this->setCursor(scolumn + 1, sline);
-}
-
-
-void PCD8544::send(unsigned char type, unsigned char data)
-{
- digitalWrite(this->pin_dc, type);
-
- digitalWrite(this->pin_sce, LOW);
- shiftOut(this->pin_sdin, this->pin_sclk, MSBFIRST, data);
- digitalWrite(this->pin_sce, HIGH);
-}
-
-
-/* vim: set expandtab ts=4 sw=4: */
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