BiosDisplay.cpp

00001 /*
00002  *  Copyright 2014 Embedded Artists AB
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 "mbed.h"
00018 #include "BiosDisplay.h"
00019 #include "BiosLoader.h"
00020 #include "DMBoard.h"
00021 #include "bios.h"
00022 
00023 
00024 /******************************************************************************
00025  * Defines and typedefs
00026  *****************************************************************************/
00027  
00028 
00029 /******************************************************************************
00030  * Local variables
00031  *****************************************************************************/
00032 
00033 
00034 /******************************************************************************
00035  * Private Functions
00036  *****************************************************************************/
00037 
00038 BiosDisplay::BiosDisplay() : 
00039     _initialized(false),
00040     _poweredOn(false),
00041     _bios(NULL),
00042     _biosData(NULL),
00043     _width(0),
00044     _height(0),
00045     _bpp(0),
00046     _supportedRes(0),
00047     _activeRes(Res_16bit_rgb565),
00048     _landscape(false)
00049 {
00050 }
00051 
00052 BiosDisplay::~BiosDisplay()
00053 {
00054   // _bios and _biosData are deallocated by BiosLoader
00055 }
00056 
00057 
00058 /******************************************************************************
00059  * Public Functions
00060  *****************************************************************************/
00061 
00062 BiosDisplay::DisplayError BiosDisplay::init()
00063 {
00064   DisplayError err = DisplayError_Ok;
00065   if (!_initialized) {
00066     do {
00067       if (BiosLoader::instance().params(&_bios, &_biosData) != DMBoard::Ok) {
00068         err = DisplayError_ConfigError;
00069         break;
00070       }
00071       
00072       err = (DisplayError)_bios->displayInit(_biosData);
00073       if (err != DisplayError_Ok) {
00074         break;
00075       }
00076 
00077       err = (DisplayError)_bios->displayInformation(_biosData, &_width, &_height, &_bpp, &_landscape, &_supportedRes, &_activeRes);
00078       if (err != DisplayError_Ok) {
00079         break;
00080       }
00081       
00082       _initialized = true;
00083     } while(0);
00084   }
00085   return err;
00086 }
00087 
00088 BiosDisplay::DisplayError BiosDisplay::powerUp(void* framebuffer, Display::Resolution res, FrameRate_t rate)
00089 {
00090   DisplayError err = DisplayError_Ok;
00091   if (!_poweredOn) {
00092     err = init();
00093     if (err == DisplayError_Ok) {
00094       do {
00095         err = (DisplayError)_bios->displayPowerUp(_biosData, framebuffer, (Resolution_t)res, rate);
00096           
00097         if (err != DisplayError_Ok) {
00098           break;
00099         }
00100 
00101         err = (DisplayError)_bios->displayInformation(_biosData, &_width, &_height, &_bpp, &_landscape, &_supportedRes, &_activeRes);     
00102         if (err != DisplayError_Ok) {
00103           break;
00104         }
00105         
00106         _poweredOn = true;
00107       } while(0);
00108     }
00109   }
00110   return err;
00111 }
00112 
00113 BiosDisplay::DisplayError BiosDisplay::powerDown()
00114 {
00115   DisplayError err = DisplayError_Ok;
00116   if (_poweredOn) {
00117     err = (DisplayError)_bios->displayPowerDown(_biosData);
00118     _poweredOn = false;
00119   }
00120   return err;
00121 }
00122 
00123 BiosDisplay::DisplayError BiosDisplay::backlight(int percent)
00124 {
00125   DisplayError err = DisplayError_Ok;
00126   if (!_initialized) {
00127       err = DisplayError_NoInit;
00128   } else {
00129     err = (DisplayError)_bios->displayBacklight(_biosData, percent);
00130   }      
00131   return err;
00132 }
00133 
00134 uint16_t BiosDisplay::width()
00135 {
00136   return _width;
00137 }
00138 
00139 uint16_t BiosDisplay::height()
00140 {
00141   return _height;
00142 }
00143 
00144 uint16_t BiosDisplay::bytesPerPixel()
00145 {
00146   return _bpp;
00147 }
00148 
00149 uint32_t BiosDisplay::fbSize()
00150 {
00151   return _width * _height * _bpp;
00152 }
00153 
00154 bool BiosDisplay::landscape()
00155 {
00156   return _landscape;
00157 }
00158 
00159 void* BiosDisplay::allocateFramebuffer(Display::Resolution res)
00160 {
00161   if (_initialized) {
00162     return malloc(_width*_height*bpp(res));
00163   }
00164   return NULL;
00165 }
00166 
00167 void* BiosDisplay::allocateFramebuffers(uint32_t num, Display::Resolution res)
00168 {
00169   if (_initialized && num>0) {
00170     return malloc(_width*_height*bpp(res)*num);
00171   }
00172   return NULL;
00173 }
00174 
00175 void BiosDisplay::setFramebuffer(void* buff)
00176 {
00177   LPC_LCD->UPBASE = (uint32_t)buff;
00178 }
00179 
00180 void* BiosDisplay::swapFramebuffer(void* buff)
00181 {
00182   uint32_t old = LPC_LCD->UPBASE;
00183   LPC_LCD->UPBASE = (uint32_t)buff;
00184   return (void*)old;
00185 }
00186 
00187 bool BiosDisplay::isSupported(Display::Resolution res)
00188 {
00189   return (_supportedRes & res);
00190 }
00191 
00192 BiosDisplay::Resolution BiosDisplay::currentResolution()
00193 {
00194   return (Resolution)_activeRes;
00195 }