EaLcdBoardGPIO.cpp

00001 /*
00002  *  Copyright 2013 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 /******************************************************************************
00018  * Includes
00019  *****************************************************************************/
00020 
00021 #include "mbed.h"
00022 #include "EaLcdBoardGPIO.h"
00023 
00024 /******************************************************************************
00025  * Defines and typedefs
00026  *****************************************************************************/
00027 
00028 
00029 EaLcdBoardGPIO::EaLcdBoardGPIO(PinName sda, PinName scl)
00030   : EaLcdBoard(sda, scl), /*pinWP(P4_15),*/ pin3v3(P2_0), pin5v(P2_21), pinDE(P2_11), pinContrast(P2_1)
00031 {
00032   pinContrast.period_ms(10);
00033   setWriteProtect(true);
00034   set3V3Signal(false);
00035   set5VSignal(false);
00036   setDisplayEnableSignal(false);
00037   setBacklightContrast(0);
00038 }
00039 
00040 
00041 void EaLcdBoardGPIO::setWriteProtect(bool enable)
00042 {  
00043     // Not Applicable
00044 }
00045 
00046 void EaLcdBoardGPIO::set3V3Signal(bool enabled) { //P2.0 L=3.3V on
00047     if (enabled) {
00048         pin3v3 = 0;
00049     } else {
00050         pin3v3 = 1;
00051     }
00052 }
00053 
00054 void EaLcdBoardGPIO::set5VSignal(bool enabled) { //P2.21 H=5V on
00055     if (enabled) {
00056         pin5v = 1;
00057     } else {
00058         pin5v = 0;
00059     }
00060 }
00061 
00062 void EaLcdBoardGPIO::setDisplayEnableSignal(bool enabled) { //P2.11 H=enabled
00063     LPC_IOCON->P2_11 &= ~7; /* GPIO2[11]  @ P2.11 */
00064     if (enabled) {
00065         pinDE = 1;
00066     } else {
00067         pinDE = 0;
00068     }
00069 }
00070 
00071 void EaLcdBoardGPIO::setBacklightContrast(uint32_t value) { //P2.1, set to 4.30 for now
00072 #if 0    
00073     LPC_IOCON->P2_1 &= ~7; /* GPIO2[1]  @ P2.1 */
00074   if (value > 50) {
00075       pinContrast = 1;
00076   } else {
00077       pinContrast = 0;
00078   }
00079 #else
00080     uint32_t tmp = LPC_IOCON->P2_1;
00081     tmp &= ~7;
00082     tmp |= 1;
00083     LPC_IOCON->P2_1 = tmp; /* PWM2[1]  @ P2.1 */
00084     float f = value;
00085     pinContrast = f/100.0f;
00086 #endif
00087   
00088 //    if (value > 100) return;
00089 
00090 //    pca9532_setBlink0Duty(100-value);
00091 //    pca9532_setBlink0Period(0);
00092 //    pca9532_setBlink0Leds(LCDB_CTRL_BL_C);
00093 }
00094 
00095 
00096