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.
Diff: lcd_spi.cpp
- Revision:
- 0:ae5037e3d6e0
- Child:
- 1:65f72ed914fa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lcd_spi.cpp Mon Nov 15 22:37:30 2010 +0000 @@ -0,0 +1,66 @@ +/* + * 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 width, unsigned int height, SPI *spi, PinName enable, PinName rs) +:TextLCDBase(width,height) +{ + _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(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(unsigned char cmd) +{ + _rs->write(0); + wait_us(1); + sendByte(cmd); + wait_us(1); + _rs->write(1); +} + +void SPILCDBase::sendData(unsigned char cmd) +{ + _rs->write(1); + wait_us(1); + sendByte(cmd); +}