epdif.cpp

00001 /**
00002  *  @filename   :   epdif.cpp
00003  *  @brief      :   Implements EPD interface functions
00004  *                  Users have to implement all the functions in epdif.cpp
00005  *  @author     :   Yehui from Waveshare
00006  *
00007  *  Copyright (C) Waveshare     August 10 2017
00008  *
00009  * Permission is hereby granted, free of charge, to any person obtaining a copy
00010  * of this software and associated documnetation files (the "Software"), to deal
00011  * in the Software without restriction, including without limitation the rights
00012  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00013  * copies of the Software, and to permit persons to  whom the Software is
00014  * furished to do so, subject to the following conditions:
00015  *
00016  * The above copyright notice and this permission notice shall be included in
00017  * all copies or substantial portions of the Software.
00018  *
00019  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00020  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00021  * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00022  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00023  * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00024  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00025  * THE SOFTWARE.
00026  */
00027 
00028 #include "epdif.h"
00029 #include "SPI.h"
00030 
00031 //DigitalOut cs_pin (D9);
00032 
00033 
00034 EpdIf::EpdIf():_spi(D11,D12,D13),/*_cs(D9)*/dc_pin(D5),busy_pin(D3),reset_pin(A2),_cs(D9){
00035     int whoami = 20;
00036     _spi.format(8,3);
00037     _spi.frequency(2000000);
00038     _cs = 0;
00039     _spi.write(0x8F);
00040     whoami = _spi.write(0x00);
00041     printf( "pre print \r\n");
00042     printf("WHOAMI register = 0x%X\r\n", whoami);
00043     printf( "post print \r\n");
00044     _cs = 1;
00045 };
00046 
00047 //EpdIf::EpdIf() {};
00048 
00049 EpdIf::~EpdIf(void) {
00050 };
00051 
00052 void EpdIf::DigitalWrite(DigitalOut &pin, int value) {
00053     //digitalWrite(pin, value);
00054     pin = value;
00055     //pin_val value;   
00056 }
00057 
00058 int EpdIf::DigitalRead(PinName &pin) {
00059     //return DigitalOut(pin).read();
00060     //DigitalOut pin_val(pin);
00061     return pin;
00062 }
00063 
00064 void EpdIf::DelayMs(unsigned int delaytime) {
00065     //delay(delaytime);
00066     
00067     wait ((((float)delaytime)/100));
00068 }
00069 
00070 void EpdIf::SpiTransfer(unsigned char data) {
00071     //DigitalOut(CS_PIN, LOW);
00072     //DigitalOut cs_pin(D9);
00073     _cs = 0;
00074     //SPI.transfer(data);
00075     //_spi.transfer (*tx_buffer , 256,*rx_buffer,256,NULL,SPI_EVENT_COMPLETE);
00076     //for (int i=0; i< 256; i++)
00077     //{
00078     
00079     int result = _spi.write(data);
00080     //printf("SPI_transfer_reply %i\r\n",result);
00081     
00082     //}
00083     
00084     //DigitalOut(CS_PIN, HIGH);
00085     _cs = 1;
00086 }
00087 
00088 int EpdIf::IfInit(void) {
00089     //pinMode(CS_PIN, OUTPUT);
00090     //pinMode(RST_PIN, OUTPUT);
00091     //pinMode(DC_PIN, OUTPUT);
00092     //pinMode(BUSY_PIN, INPUT); 
00093     //_spi.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
00094     //_spi.begin();
00095     return 0;
00096 }
00097