蔡 秉庭 / Mbed 2 deprecated 2020_09_07_AD7190_LoRa

2020_09_07_AD7190_LoRa

Dependencies:   mbed

Communication.cpp@0:0e20215b178e, 2020-08-06 (annotated)

Committer:
peng103617
Date:
Thu Aug 06 06:52:19 2020 +0000
Revision:
0:0e20215b178e
AD7190_LoRa

Who changed what in which revision?

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peng103617 0:0e20215b178e 1 /***************************************************************************//**
peng103617 0:0e20215b178e 2 * @file Communication.c
peng103617 0:0e20215b178e 3 * @brief Implementation of Communication Driver.
peng103617 0:0e20215b178e 4 * @author DBogdan (dragos.bogdan@analog.com)
peng103617 0:0e20215b178e 5 ********************************************************************************
peng103617 0:0e20215b178e 6 * Copyright 2012-2015(c) Analog Devices, Inc.
peng103617 0:0e20215b178e 7 *
peng103617 0:0e20215b178e 8 * All rights reserved.
peng103617 0:0e20215b178e 9 *
peng103617 0:0e20215b178e 10 * Redistribution and use in source and binary forms, with or without
peng103617 0:0e20215b178e 11 * modification, are permitted provided that the following conditions are met:
peng103617 0:0e20215b178e 12 * - Redistributions of source code must retain the above copyright
peng103617 0:0e20215b178e 13 * notice, this list of conditions and the following disclaimer.
peng103617 0:0e20215b178e 14 * - Redistributions in binary form must reproduce the above copyright
peng103617 0:0e20215b178e 15 * notice, this list of conditions and the following disclaimer in
peng103617 0:0e20215b178e 16 * the documentation and/or other materials provided with the
peng103617 0:0e20215b178e 17 * distribution.
peng103617 0:0e20215b178e 18 * - Neither the name of Analog Devices, Inc. nor the names of its
peng103617 0:0e20215b178e 19 * contributors may be used to endorse or promote products derived
peng103617 0:0e20215b178e 20 * from this software without specific prior written permission.
peng103617 0:0e20215b178e 21 * - The use of this software may or may not infringe the patent rights
peng103617 0:0e20215b178e 22 * of one or more patent holders. This license does not release you
peng103617 0:0e20215b178e 23 * from the requirement that you obtain separate licenses from these
peng103617 0:0e20215b178e 24 * patent holders to use this software.
peng103617 0:0e20215b178e 25 * - Use of the software either in source or binary form, must be run
peng103617 0:0e20215b178e 26 * on or directly connected to an Analog Devices Inc. component.
peng103617 0:0e20215b178e 27 *
peng103617 0:0e20215b178e 28 * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
peng103617 0:0e20215b178e 29 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
peng103617 0:0e20215b178e 30 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
peng103617 0:0e20215b178e 31 * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
peng103617 0:0e20215b178e 32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
peng103617 0:0e20215b178e 33 * LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
peng103617 0:0e20215b178e 34 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
peng103617 0:0e20215b178e 35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
peng103617 0:0e20215b178e 36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
peng103617 0:0e20215b178e 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
peng103617 0:0e20215b178e 38 *
peng103617 0:0e20215b178e 39 *******************************************************************************/
peng103617 0:0e20215b178e 40
peng103617 0:0e20215b178e 41 /******************************************************************************/
peng103617 0:0e20215b178e 42 /* Include Files */
peng103617 0:0e20215b178e 43 /******************************************************************************/
peng103617 0:0e20215b178e 44 #include "Communication.h"
peng103617 0:0e20215b178e 45 #include "stdlib.h"
peng103617 0:0e20215b178e 46 #include "mbed.h"
peng103617 0:0e20215b178e 47 /***************************************************************************//**
peng103617 0:0e20215b178e 48 * @brief Initializes the SPI communication peripheral.
peng103617 0:0e20215b178e 49 *
peng103617 0:0e20215b178e 50 * @param lsbFirst - Transfer format (0 or 1).
peng103617 0:0e20215b178e 51 * Example: 0x0 - MSB first.
peng103617 0:0e20215b178e 52 * 0x1 - LSB first.
peng103617 0:0e20215b178e 53 * @param clockFreq - SPI clock frequency (Hz).
peng103617 0:0e20215b178e 54 * Example: 1000 - SPI clock frequency is 1 kHz.
peng103617 0:0e20215b178e 55 * @param clockPol - SPI clock polarity (0 or 1).
peng103617 0:0e20215b178e 56 * Example: 0x0 - Idle state for clock is a low level; active
peng103617 0:0e20215b178e 57 * state is a high level;
peng103617 0:0e20215b178e 58 * 0x1 - Idle state for clock is a high level; active
peng103617 0:0e20215b178e 59 * state is a low level.
peng103617 0:0e20215b178e 60 * @param clockEdg - SPI clock edge (0 or 1).
peng103617 0:0e20215b178e 61 * Example: 0x0 - Serial output data changes on transition
peng103617 0:0e20215b178e 62 * from idle clock state to active clock state;
peng103617 0:0e20215b178e 63 * 0x1 - Serial output data changes on transition
peng103617 0:0e20215b178e 64 * from active clock state to idle clock state.
peng103617 0:0e20215b178e 65 *
peng103617 0:0e20215b178e 66 * @return status - Result of the initialization procedure.
peng103617 0:0e20215b178e 67 * Example: 1 - if initialization was successful;
peng103617 0:0e20215b178e 68 * 0 - if initialization was unsuccessful.
peng103617 0:0e20215b178e 69 *******************************************************************************/
peng103617 0:0e20215b178e 70 #define PRINT_SPI_INFO
peng103617 0:0e20215b178e 71
peng103617 0:0e20215b178e 72
peng103617 0:0e20215b178e 73 unsigned char read_buff[AD7190_READ_BUFFER_SIZE];
peng103617 0:0e20215b178e 74
peng103617 0:0e20215b178e 75
peng103617 0:0e20215b178e 76 unsigned char SPI_Init(unsigned char lsbFirst,
peng103617 0:0e20215b178e 77 unsigned long clockFreq,
peng103617 0:0e20215b178e 78 unsigned char clockPol,
peng103617 0:0e20215b178e 79 unsigned char clockEdg)
peng103617 0:0e20215b178e 80 {
peng103617 0:0e20215b178e 81 /* Add your code here. */
peng103617 0:0e20215b178e 82 spi.format(8,3);
peng103617 0:0e20215b178e 83 spi.frequency(clockFreq);
peng103617 0:0e20215b178e 84 memset(read_buff, 0, AD7190_READ_BUFFER_SIZE);
peng103617 0:0e20215b178e 85 return 1;
peng103617 0:0e20215b178e 86 }
peng103617 0:0e20215b178e 87
peng103617 0:0e20215b178e 88 /***************************************************************************//**
peng103617 0:0e20215b178e 89 * @brief Reads data from SPI.
peng103617 0:0e20215b178e 90 *
peng103617 0:0e20215b178e 91 * @param data - Data represents the write buffer as an input parameter and the
peng103617 0:0e20215b178e 92 * read buffer as an output parameter.
peng103617 0:0e20215b178e 93 * @param bytesNumber - Number of bytes to read.
peng103617 0:0e20215b178e 94 *
peng103617 0:0e20215b178e 95 * @return Number of read bytes.
peng103617 0:0e20215b178e 96 *******************************************************************************/
peng103617 0:0e20215b178e 97 unsigned char SPI_Read(unsigned char* data,
peng103617 0:0e20215b178e 98 unsigned char bytesNumber)
peng103617 0:0e20215b178e 99 {
peng103617 0:0e20215b178e 100 /* Add your code here. */
peng103617 0:0e20215b178e 101 int r_cnt = 0;
peng103617 0:0e20215b178e 102
peng103617 0:0e20215b178e 103 if(bytesNumber > AD7190_READ_BUFFER_SIZE) return 0;
peng103617 0:0e20215b178e 104
peng103617 0:0e20215b178e 105 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 106 // pc.printf("[SPI-OTR] 0x%02x\r\n", data[0]);
peng103617 0:0e20215b178e 107 #endif
peng103617 0:0e20215b178e 108
peng103617 0:0e20215b178e 109 data[r_cnt] = spi.write(data[0]);
peng103617 0:0e20215b178e 110 bytesNumber --;
peng103617 0:0e20215b178e 111 r_cnt++;
peng103617 0:0e20215b178e 112
peng103617 0:0e20215b178e 113 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 114 // pc.printf("[SPI-IN ] ");
peng103617 0:0e20215b178e 115 #endif
peng103617 0:0e20215b178e 116 while(bytesNumber > 0){
peng103617 0:0e20215b178e 117 data[r_cnt] = spi.write(0xFF);
peng103617 0:0e20215b178e 118
peng103617 0:0e20215b178e 119 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 120 // pc.printf("0x%02x\t", data[r_cnt]);
peng103617 0:0e20215b178e 121 #endif
peng103617 0:0e20215b178e 122
peng103617 0:0e20215b178e 123 r_cnt++;
peng103617 0:0e20215b178e 124 bytesNumber --;
peng103617 0:0e20215b178e 125 }
peng103617 0:0e20215b178e 126
peng103617 0:0e20215b178e 127 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 128 // pc.printf("\r\n");
peng103617 0:0e20215b178e 129 #endif
peng103617 0:0e20215b178e 130
peng103617 0:0e20215b178e 131 return r_cnt;
peng103617 0:0e20215b178e 132 }
peng103617 0:0e20215b178e 133
peng103617 0:0e20215b178e 134 /***************************************************************************//**
peng103617 0:0e20215b178e 135 * @brief Writes data to SPI.
peng103617 0:0e20215b178e 136 *
peng103617 0:0e20215b178e 137 * @param data - Data represents the write buffer.
peng103617 0:0e20215b178e 138 * @param bytesNumber - Number of bytes to write.
peng103617 0:0e20215b178e 139 *
peng103617 0:0e20215b178e 140 * @return Number of written bytes.
peng103617 0:0e20215b178e 141 *******************************************************************************/
peng103617 0:0e20215b178e 142 unsigned char SPI_Write(unsigned char* data,
peng103617 0:0e20215b178e 143 unsigned char bytesNumber)
peng103617 0:0e20215b178e 144 {
peng103617 0:0e20215b178e 145 /* Add your code here. */
peng103617 0:0e20215b178e 146 memset(read_buff, 0, AD7190_READ_BUFFER_SIZE);
peng103617 0:0e20215b178e 147 int w_cnt = 0;
peng103617 0:0e20215b178e 148
peng103617 0:0e20215b178e 149 if(bytesNumber > AD7190_READ_BUFFER_SIZE) return 0;
peng103617 0:0e20215b178e 150
peng103617 0:0e20215b178e 151 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 152 // pc.printf("[SPI-OUT] ");
peng103617 0:0e20215b178e 153 #endif
peng103617 0:0e20215b178e 154
peng103617 0:0e20215b178e 155 while(bytesNumber > 0){
peng103617 0:0e20215b178e 156 read_buff[w_cnt] = spi.write(data[w_cnt]);
peng103617 0:0e20215b178e 157
peng103617 0:0e20215b178e 158 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 159 // pc.printf("0x%02x\t", data[w_cnt]);
peng103617 0:0e20215b178e 160 #endif
peng103617 0:0e20215b178e 161
peng103617 0:0e20215b178e 162 w_cnt++;
peng103617 0:0e20215b178e 163 bytesNumber --;
peng103617 0:0e20215b178e 164 }
peng103617 0:0e20215b178e 165
peng103617 0:0e20215b178e 166 #ifdef PRINT_SPI_INFO
peng103617 0:0e20215b178e 167 // pc.printf("\r\n[SPI-RTN] ");
peng103617 0:0e20215b178e 168 for(int i=0; i<w_cnt; i++){
peng103617 0:0e20215b178e 169 // pc.printf("0x%02x\t", read_buff[w_cnt]);
peng103617 0:0e20215b178e 170 }
peng103617 0:0e20215b178e 171 // pc.printf("\r\n");
peng103617 0:0e20215b178e 172 #endif
peng103617 0:0e20215b178e 173
peng103617 0:0e20215b178e 174 return w_cnt;
peng103617 0:0e20215b178e 175 }