Lin Team / Mbed 2 deprecated AD7190

AD7190

Dependencies:   mbed

Communication.cpp@0:e74e2fd7a61e, 2020-08-06 (annotated)

Committer:
peng103617
Date:
Thu Aug 06 06:51:32 2020 +0000
Revision:
0:e74e2fd7a61e
AD7190

Who changed what in which revision?

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peng103617 0:e74e2fd7a61e 1 /***************************************************************************//**
peng103617 0:e74e2fd7a61e 2 * @file Communication.c
peng103617 0:e74e2fd7a61e 3 * @brief Implementation of Communication Driver.
peng103617 0:e74e2fd7a61e 4 * @author DBogdan (dragos.bogdan@analog.com)
peng103617 0:e74e2fd7a61e 5 ********************************************************************************
peng103617 0:e74e2fd7a61e 6 * Copyright 2012-2015(c) Analog Devices, Inc.
peng103617 0:e74e2fd7a61e 7 *
peng103617 0:e74e2fd7a61e 8 * All rights reserved.
peng103617 0:e74e2fd7a61e 9 *
peng103617 0:e74e2fd7a61e 10 * Redistribution and use in source and binary forms, with or without
peng103617 0:e74e2fd7a61e 11 * modification, are permitted provided that the following conditions are met:
peng103617 0:e74e2fd7a61e 12 * - Redistributions of source code must retain the above copyright
peng103617 0:e74e2fd7a61e 13 * notice, this list of conditions and the following disclaimer.
peng103617 0:e74e2fd7a61e 14 * - Redistributions in binary form must reproduce the above copyright
peng103617 0:e74e2fd7a61e 15 * notice, this list of conditions and the following disclaimer in
peng103617 0:e74e2fd7a61e 16 * the documentation and/or other materials provided with the
peng103617 0:e74e2fd7a61e 17 * distribution.
peng103617 0:e74e2fd7a61e 18 * - Neither the name of Analog Devices, Inc. nor the names of its
peng103617 0:e74e2fd7a61e 19 * contributors may be used to endorse or promote products derived
peng103617 0:e74e2fd7a61e 20 * from this software without specific prior written permission.
peng103617 0:e74e2fd7a61e 21 * - The use of this software may or may not infringe the patent rights
peng103617 0:e74e2fd7a61e 22 * of one or more patent holders. This license does not release you
peng103617 0:e74e2fd7a61e 23 * from the requirement that you obtain separate licenses from these
peng103617 0:e74e2fd7a61e 24 * patent holders to use this software.
peng103617 0:e74e2fd7a61e 25 * - Use of the software either in source or binary form, must be run
peng103617 0:e74e2fd7a61e 26 * on or directly connected to an Analog Devices Inc. component.
peng103617 0:e74e2fd7a61e 27 *
peng103617 0:e74e2fd7a61e 28 * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
peng103617 0:e74e2fd7a61e 29 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
peng103617 0:e74e2fd7a61e 30 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
peng103617 0:e74e2fd7a61e 31 * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
peng103617 0:e74e2fd7a61e 32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
peng103617 0:e74e2fd7a61e 33 * LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
peng103617 0:e74e2fd7a61e 34 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
peng103617 0:e74e2fd7a61e 35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
peng103617 0:e74e2fd7a61e 36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
peng103617 0:e74e2fd7a61e 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
peng103617 0:e74e2fd7a61e 38 *
peng103617 0:e74e2fd7a61e 39 *******************************************************************************/
peng103617 0:e74e2fd7a61e 40
peng103617 0:e74e2fd7a61e 41 /******************************************************************************/
peng103617 0:e74e2fd7a61e 42 /* Include Files */
peng103617 0:e74e2fd7a61e 43 /******************************************************************************/
peng103617 0:e74e2fd7a61e 44 #include "Communication.h"
peng103617 0:e74e2fd7a61e 45 #include "stdlib.h"
peng103617 0:e74e2fd7a61e 46 #include "mbed.h"
peng103617 0:e74e2fd7a61e 47 /***************************************************************************//**
peng103617 0:e74e2fd7a61e 48 * @brief Initializes the SPI communication peripheral.
peng103617 0:e74e2fd7a61e 49 *
peng103617 0:e74e2fd7a61e 50 * @param lsbFirst - Transfer format (0 or 1).
peng103617 0:e74e2fd7a61e 51 * Example: 0x0 - MSB first.
peng103617 0:e74e2fd7a61e 52 * 0x1 - LSB first.
peng103617 0:e74e2fd7a61e 53 * @param clockFreq - SPI clock frequency (Hz).
peng103617 0:e74e2fd7a61e 54 * Example: 1000 - SPI clock frequency is 1 kHz.
peng103617 0:e74e2fd7a61e 55 * @param clockPol - SPI clock polarity (0 or 1).
peng103617 0:e74e2fd7a61e 56 * Example: 0x0 - Idle state for clock is a low level; active
peng103617 0:e74e2fd7a61e 57 * state is a high level;
peng103617 0:e74e2fd7a61e 58 * 0x1 - Idle state for clock is a high level; active
peng103617 0:e74e2fd7a61e 59 * state is a low level.
peng103617 0:e74e2fd7a61e 60 * @param clockEdg - SPI clock edge (0 or 1).
peng103617 0:e74e2fd7a61e 61 * Example: 0x0 - Serial output data changes on transition
peng103617 0:e74e2fd7a61e 62 * from idle clock state to active clock state;
peng103617 0:e74e2fd7a61e 63 * 0x1 - Serial output data changes on transition
peng103617 0:e74e2fd7a61e 64 * from active clock state to idle clock state.
peng103617 0:e74e2fd7a61e 65 *
peng103617 0:e74e2fd7a61e 66 * @return status - Result of the initialization procedure.
peng103617 0:e74e2fd7a61e 67 * Example: 1 - if initialization was successful;
peng103617 0:e74e2fd7a61e 68 * 0 - if initialization was unsuccessful.
peng103617 0:e74e2fd7a61e 69 *******************************************************************************/
peng103617 0:e74e2fd7a61e 70 #define PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 71
peng103617 0:e74e2fd7a61e 72
peng103617 0:e74e2fd7a61e 73 unsigned char read_buff[AD7190_READ_BUFFER_SIZE];
peng103617 0:e74e2fd7a61e 74
peng103617 0:e74e2fd7a61e 75
peng103617 0:e74e2fd7a61e 76 unsigned char SPI_Init(unsigned char lsbFirst,
peng103617 0:e74e2fd7a61e 77 unsigned long clockFreq,
peng103617 0:e74e2fd7a61e 78 unsigned char clockPol,
peng103617 0:e74e2fd7a61e 79 unsigned char clockEdg)
peng103617 0:e74e2fd7a61e 80 {
peng103617 0:e74e2fd7a61e 81 /* Add your code here. */
peng103617 0:e74e2fd7a61e 82 spi.format(8,3);
peng103617 0:e74e2fd7a61e 83 spi.frequency(clockFreq);
peng103617 0:e74e2fd7a61e 84 memset(read_buff, 0, AD7190_READ_BUFFER_SIZE);
peng103617 0:e74e2fd7a61e 85 return 1;
peng103617 0:e74e2fd7a61e 86 }
peng103617 0:e74e2fd7a61e 87
peng103617 0:e74e2fd7a61e 88 /***************************************************************************//**
peng103617 0:e74e2fd7a61e 89 * @brief Reads data from SPI.
peng103617 0:e74e2fd7a61e 90 *
peng103617 0:e74e2fd7a61e 91 * @param data - Data represents the write buffer as an input parameter and the
peng103617 0:e74e2fd7a61e 92 * read buffer as an output parameter.
peng103617 0:e74e2fd7a61e 93 * @param bytesNumber - Number of bytes to read.
peng103617 0:e74e2fd7a61e 94 *
peng103617 0:e74e2fd7a61e 95 * @return Number of read bytes.
peng103617 0:e74e2fd7a61e 96 *******************************************************************************/
peng103617 0:e74e2fd7a61e 97 unsigned char SPI_Read(unsigned char* data,
peng103617 0:e74e2fd7a61e 98 unsigned char bytesNumber)
peng103617 0:e74e2fd7a61e 99 {
peng103617 0:e74e2fd7a61e 100 /* Add your code here. */
peng103617 0:e74e2fd7a61e 101 int r_cnt = 0;
peng103617 0:e74e2fd7a61e 102
peng103617 0:e74e2fd7a61e 103 if(bytesNumber > AD7190_READ_BUFFER_SIZE) return 0;
peng103617 0:e74e2fd7a61e 104
peng103617 0:e74e2fd7a61e 105 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 106 // pc.printf("[SPI-OTR] 0x%02x\r\n", data[0]);
peng103617 0:e74e2fd7a61e 107 #endif
peng103617 0:e74e2fd7a61e 108
peng103617 0:e74e2fd7a61e 109 data[r_cnt] = spi.write(data[0]);
peng103617 0:e74e2fd7a61e 110 bytesNumber --;
peng103617 0:e74e2fd7a61e 111 r_cnt++;
peng103617 0:e74e2fd7a61e 112
peng103617 0:e74e2fd7a61e 113 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 114 // pc.printf("[SPI-IN ] ");
peng103617 0:e74e2fd7a61e 115 #endif
peng103617 0:e74e2fd7a61e 116 while(bytesNumber > 0){
peng103617 0:e74e2fd7a61e 117 data[r_cnt] = spi.write(0xFF);
peng103617 0:e74e2fd7a61e 118
peng103617 0:e74e2fd7a61e 119 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 120 // pc.printf("0x%02x\t", data[r_cnt]);
peng103617 0:e74e2fd7a61e 121 #endif
peng103617 0:e74e2fd7a61e 122
peng103617 0:e74e2fd7a61e 123 r_cnt++;
peng103617 0:e74e2fd7a61e 124 bytesNumber --;
peng103617 0:e74e2fd7a61e 125 }
peng103617 0:e74e2fd7a61e 126
peng103617 0:e74e2fd7a61e 127 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 128 // pc.printf("\r\n");
peng103617 0:e74e2fd7a61e 129 #endif
peng103617 0:e74e2fd7a61e 130
peng103617 0:e74e2fd7a61e 131 return r_cnt;
peng103617 0:e74e2fd7a61e 132 }
peng103617 0:e74e2fd7a61e 133
peng103617 0:e74e2fd7a61e 134 /***************************************************************************//**
peng103617 0:e74e2fd7a61e 135 * @brief Writes data to SPI.
peng103617 0:e74e2fd7a61e 136 *
peng103617 0:e74e2fd7a61e 137 * @param data - Data represents the write buffer.
peng103617 0:e74e2fd7a61e 138 * @param bytesNumber - Number of bytes to write.
peng103617 0:e74e2fd7a61e 139 *
peng103617 0:e74e2fd7a61e 140 * @return Number of written bytes.
peng103617 0:e74e2fd7a61e 141 *******************************************************************************/
peng103617 0:e74e2fd7a61e 142 unsigned char SPI_Write(unsigned char* data,
peng103617 0:e74e2fd7a61e 143 unsigned char bytesNumber)
peng103617 0:e74e2fd7a61e 144 {
peng103617 0:e74e2fd7a61e 145 /* Add your code here. */
peng103617 0:e74e2fd7a61e 146 memset(read_buff, 0, AD7190_READ_BUFFER_SIZE);
peng103617 0:e74e2fd7a61e 147 int w_cnt = 0;
peng103617 0:e74e2fd7a61e 148
peng103617 0:e74e2fd7a61e 149 if(bytesNumber > AD7190_READ_BUFFER_SIZE) return 0;
peng103617 0:e74e2fd7a61e 150
peng103617 0:e74e2fd7a61e 151 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 152 // pc.printf("[SPI-OUT] ");
peng103617 0:e74e2fd7a61e 153 #endif
peng103617 0:e74e2fd7a61e 154
peng103617 0:e74e2fd7a61e 155 while(bytesNumber > 0){
peng103617 0:e74e2fd7a61e 156 read_buff[w_cnt] = spi.write(data[w_cnt]);
peng103617 0:e74e2fd7a61e 157
peng103617 0:e74e2fd7a61e 158 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 159 // pc.printf("0x%02x\t", data[w_cnt]);
peng103617 0:e74e2fd7a61e 160 #endif
peng103617 0:e74e2fd7a61e 161
peng103617 0:e74e2fd7a61e 162 w_cnt++;
peng103617 0:e74e2fd7a61e 163 bytesNumber --;
peng103617 0:e74e2fd7a61e 164 }
peng103617 0:e74e2fd7a61e 165
peng103617 0:e74e2fd7a61e 166 #ifdef PRINT_SPI_INFO
peng103617 0:e74e2fd7a61e 167 // pc.printf("\r\n[SPI-RTN] ");
peng103617 0:e74e2fd7a61e 168 for(int i=0; i<w_cnt; i++){
peng103617 0:e74e2fd7a61e 169 // pc.printf("0x%02x\t", read_buff[w_cnt]);
peng103617 0:e74e2fd7a61e 170 }
peng103617 0:e74e2fd7a61e 171 // pc.printf("\r\n");
peng103617 0:e74e2fd7a61e 172 #endif
peng103617 0:e74e2fd7a61e 173
peng103617 0:e74e2fd7a61e 174 return w_cnt;
peng103617 0:e74e2fd7a61e 175 }