SharpLCD.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "SharpLCD.hpp"
00018 
00019 void
00020 SharpLCD::writeBuffer(const uint8_t *buffer, unsigned len)
00021 {
00022     chipSelect = 1;
00023     while (len--) {
00024         spi.write(*buffer++);
00025     }
00026     chipSelect = 0;
00027 }
00028 
00029 void
00030 SharpLCD::clear(void)
00031 {
00032     const uint8_t buf[2] = {M2_FLAG, DUMMY8};
00033 
00034     writeBuffer(buf, sizeof(buf));
00035 }
00036 
00037 void
00038 SharpLCD::drawFrameBuffer(const FrameBuffer &fb)
00039 {
00040     writeBuffer(fb.getBuffer(), SIZEOF_FRAMEBUFFER_FOR_ALLOC);
00041 }
00042 
00043 void
00044 SharpLCD::toggleVCOM(void)
00045 {
00046     static bool frameInversion = false;
00047     uint8_t buf[2] = {0, DUMMY8};
00048 
00049     uint8_t mode = 0x0;
00050     if (frameInversion) {
00051         mode |= M1_FLAG;
00052     }
00053     frameInversion = !frameInversion; /* toggle frameInversion in
00054                                        * preparation for the next call */
00055 
00056     buf[0] = mode;
00057     writeBuffer(buf, sizeof(buf));
00058 }