Display text on LCD displays (even on multiple ones). Allow to create windows (frames) on display, and to combine them (split, add, duplicate, scroll). See http://mbed.org/users/hlipka/notebook/lcdwindow/ for more information.
lcd_spi.cpp
- Committer:
- hlipka
- Date:
- 2010-11-27
- Revision:
- 2:5ac5bab7daaf
- Parent:
- 1:65f72ed914fa
File content as of revision 2:5ac5bab7daaf:
/* * mbed LCDWindow library * Copyright (c) 2010 Hendrik Lipka * * 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 "lcd_spi.h" #include "SPI.h" #include "DigitalOut.h" #include "wait_api.h" SPILCDBase::SPILCDBase (unsigned int columns, unsigned int rows, SPI *spi, PinName enable, PinName rs) :TextLCDBase(columns,rows) { _spi=spi; _enable=new DigitalOut(enable); _rs=new DigitalOut(rs); _enable->write(1); _spi->format(8,3); // 8 bits, cpol=1, cpha=1 (should be mode 2, but phase seems inverted) // set SPI frequency at 0.1 MHz _spi->frequency(100000); } void SPILCDBase::sendByte(const unsigned char byte) { _enable->write(0); // enable transfer wait_us(1); _spi->write(byte); // send byte over wire wait_us(20); _enable->write(1); } void SPILCDBase::sendCmd(const unsigned char cmd) { _rs->write(0); wait_us(1); sendByte(cmd); wait_us(1); _rs->write(1); } void SPILCDBase::sendData(const unsigned char cmd) { _rs->write(1); wait_us(1); sendByte(cmd); }