MB85RSxx_SPI.cpp

00001 /**
00002  ******************************************************************************
00003  * @file    MB85RSxx_SPI.cpp
00004  * @author  APS Lab
00005  * @version V1.0.0
00006  * @date    26 June 2017
00007  * @brief   MB85RSxx_SPI class implementation
00008  ******************************************************************************
00009  * @attention
00010  *
00011  * Permission is hereby granted, free of charge, to any person obtaining a copy
00012  * of this software and associated documentation files (the "Software"), to deal
00013  * in the Software without restriction, including without limitation the rights
00014  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00015  * copies of the Software, and to permit persons to whom the Software is
00016  * furnished to do so, subject to the following conditions:
00017  *
00018  * The above copyright notice and this permission notice shall be included in
00019  * all copies or substantial portions of the Software.
00020  *
00021  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00022  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00023  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00024  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00025  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00026  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00027  * THE SOFTWARE.
00028  */
00029 #include "mbed.h"
00030 #include "MB85RSxx_SPI.h"
00031 
00032 MB85RSxx_SPI::MB85RSxx_SPI(PinName mosi, PinName miso, PinName sclk, PinName nss)
00033     :
00034     _spi_p(new SPI(mosi, miso, sclk)), 
00035     _spi(*_spi_p),
00036     _di_p(new DigitalOut(nss)),
00037     _di(*_di_p)
00038 {
00039     _spi.format(8,0);
00040     _spi.frequency(10000000);
00041 }
00042 
00043 MB85RSxx_SPI::~MB85RSxx_SPI()
00044 {
00045     if (NULL != _spi_p)
00046         delete  _spi_p;
00047 }
00048 
00049 void MB85RSxx_SPI::Init(void)
00050 {
00051     char sts;
00052     _di=0;
00053     _spi.write(WRDI);
00054     _di=1;
00055     wait(0.2);
00056     _di=0;
00057     _spi.write(WREN);
00058     _di=1;
00059     wait(0.2);
00060     _di=0;
00061     _spi.write(WRSR);
00062     _spi.write(SR_WEL);
00063     _di=1;
00064     wait(0.2);
00065     _di=0;
00066     _spi.write(RDSR);
00067     sts=_spi.write(0x00);
00068     _di=1;
00069     printf("FRAM Status %x\n", sts);
00070 }
00071 
00072 void MB85RSxx_SPI::write(uint32_t address, char data)
00073 {
00074     _di=0;
00075     _spi.write(WREN);
00076     _di=1;
00077     _di=0;
00078     _spi.write(WRITE);
00079     _spi.write((address & 0x3F00) >> 8);//Addr H for 64Kbits
00080     _spi.write((address & 0x00FF)); //Addr L for 64Kbits
00081     _spi.write(data);  //Write Data
00082     _di=1;
00083 }
00084 
00085 char MB85RSxx_SPI::read(uint32_t address)
00086 {
00087     char ch;
00088     _di=0;
00089     _spi.write(READ);
00090     _spi.write((address & 0x3F00) >> 8);//Addr H for 64Kbits
00091     _spi.write((address & 0x00FF)); //Addr L for 64Kbits
00092     ch = _spi.write(0x00);//Write dummy 0x00, Reade Data
00093     _di=1;
00094     return ch;
00095 } 
00096 
00097 
00098 void MB85RSxx_SPI::write(uint32_t address, char *data, uint32_t length)
00099 {
00100     int idx;
00101     for(idx=0; idx < length; idx++)
00102     {
00103         MB85RSxx_SPI::write(address+idx, *(data+idx));
00104     }
00105 }
00106 
00107 void MB85RSxx_SPI::read(uint32_t address, char *data, uint32_t length)
00108 {
00109     uint32_t idx;
00110     for(idx=0; idx < length; idx++)
00111     {
00112         *(data+idx) = MB85RSxx_SPI::read(address+idx);
00113     }
00114 } 
00115