CAC_smartcushion / Mbed OS 4Bridge_ADISense1000_3load

(Working) Code to interface 3 LoadCells to ADISense1000 and display values using the Labview code.

Fork of 4Bridge_ADISense1000_Example_copy by CAC_smartcushion

src/mbed/adi_sense_spi.cpp@3:83d10123d1cd, 2018-08-08 (annotated)

Committer:
RGurav
Date:
Wed Aug 08 08:08:53 2018 +0000
Revision:
3:83d10123d1cd
Parent:
0:76fed7dd9235 
(Working); Code to interface 3 loadCell to ADISense1000 and display using Labview code.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
seanwilson10 0:76fed7dd9235 1 /*!
seanwilson10 0:76fed7dd9235 2 ******************************************************************************
seanwilson10 0:76fed7dd9235 3 * @file: adi_sense_spi.cpp
seanwilson10 0:76fed7dd9235 4 * @brief: ADI Sense OS-dependent wrapper layer for SPI interface
seanwilson10 0:76fed7dd9235 5 *-----------------------------------------------------------------------------
seanwilson10 0:76fed7dd9235 6 */
seanwilson10 0:76fed7dd9235 7
seanwilson10 0:76fed7dd9235 8 /******************************************************************************
seanwilson10 0:76fed7dd9235 9 Copyright 2017 (c) Analog Devices, Inc.
seanwilson10 0:76fed7dd9235 10
seanwilson10 0:76fed7dd9235 11 All rights reserved.
seanwilson10 0:76fed7dd9235 12
seanwilson10 0:76fed7dd9235 13 Redistribution and use in source and binary forms, with or without
seanwilson10 0:76fed7dd9235 14 modification, are permitted provided that the following conditions are met:
seanwilson10 0:76fed7dd9235 15 - Redistributions of source code must retain the above copyright
seanwilson10 0:76fed7dd9235 16 notice, this list of conditions and the following disclaimer.
seanwilson10 0:76fed7dd9235 17 - Redistributions in binary form must reproduce the above copyright
seanwilson10 0:76fed7dd9235 18 notice, this list of conditions and the following disclaimer in
seanwilson10 0:76fed7dd9235 19 the documentation and/or other materials provided with the
seanwilson10 0:76fed7dd9235 20 distribution.
seanwilson10 0:76fed7dd9235 21 - Neither the name of Analog Devices, Inc. nor the names of its
seanwilson10 0:76fed7dd9235 22 contributors may be used to endorse or promote products derived
seanwilson10 0:76fed7dd9235 23 from this software without specific prior written permission.
seanwilson10 0:76fed7dd9235 24 - The use of this software may or may not infringe the patent rights
seanwilson10 0:76fed7dd9235 25 of one or more patent holders. This license does not release you
seanwilson10 0:76fed7dd9235 26 from the requirement that you obtain separate licenses from these
seanwilson10 0:76fed7dd9235 27 patent holders to use this software.
seanwilson10 0:76fed7dd9235 28 - Use of the software either in source or binary form, must be run
seanwilson10 0:76fed7dd9235 29 on or directly connected to an Analog Devices Inc. component.
seanwilson10 0:76fed7dd9235 30
seanwilson10 0:76fed7dd9235 31 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
seanwilson10 0:76fed7dd9235 32 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
seanwilson10 0:76fed7dd9235 33 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
seanwilson10 0:76fed7dd9235 34 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
seanwilson10 0:76fed7dd9235 35 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
seanwilson10 0:76fed7dd9235 36 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
seanwilson10 0:76fed7dd9235 37 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
seanwilson10 0:76fed7dd9235 38 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
seanwilson10 0:76fed7dd9235 39 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
seanwilson10 0:76fed7dd9235 40 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
seanwilson10 0:76fed7dd9235 41 *
seanwilson10 0:76fed7dd9235 42 *****************************************************************************/
seanwilson10 0:76fed7dd9235 43
seanwilson10 0:76fed7dd9235 44 #include <mbed.h>
seanwilson10 0:76fed7dd9235 45
seanwilson10 0:76fed7dd9235 46 #include "inc/adi_sense_spi.h"
seanwilson10 0:76fed7dd9235 47 #include "inc/adi_sense_log.h"
seanwilson10 0:76fed7dd9235 48
seanwilson10 0:76fed7dd9235 49 #define ADI_SENSE_SPI_MODE 0 /* CPOL=0, CPHA=0 */
seanwilson10 0:76fed7dd9235 50 #define ADI_SENSE_SPI_FRAME_SIZE 8 /* 8-bit frame size */
seanwilson10 0:76fed7dd9235 51
seanwilson10 0:76fed7dd9235 52 class SpiContext
seanwilson10 0:76fed7dd9235 53 {
seanwilson10 0:76fed7dd9235 54 public:
seanwilson10 0:76fed7dd9235 55 SpiContext(
seanwilson10 0:76fed7dd9235 56 PinName mosiPin,
seanwilson10 0:76fed7dd9235 57 PinName misoPin,
seanwilson10 0:76fed7dd9235 58 PinName sckPin,
seanwilson10 0:76fed7dd9235 59 PinName csPin,
seanwilson10 0:76fed7dd9235 60 unsigned maxSpeed);
seanwilson10 0:76fed7dd9235 61
seanwilson10 0:76fed7dd9235 62 int transfer(
seanwilson10 0:76fed7dd9235 63 void *pTxData,
seanwilson10 0:76fed7dd9235 64 void *pRxData,
seanwilson10 0:76fed7dd9235 65 unsigned nLength,
seanwilson10 0:76fed7dd9235 66 bool bCsHold);
seanwilson10 0:76fed7dd9235 67
seanwilson10 0:76fed7dd9235 68 private:
seanwilson10 0:76fed7dd9235 69 SPI _spi;
seanwilson10 0:76fed7dd9235 70 DigitalOut _cs;
seanwilson10 0:76fed7dd9235 71
seanwilson10 0:76fed7dd9235 72 event_callback_t _callback;
seanwilson10 0:76fed7dd9235 73 volatile int _cbEvent;
seanwilson10 0:76fed7dd9235 74 volatile bool _cbFired;
seanwilson10 0:76fed7dd9235 75
seanwilson10 0:76fed7dd9235 76 void _cbHandler(
seanwilson10 0:76fed7dd9235 77 int event);
seanwilson10 0:76fed7dd9235 78
seanwilson10 0:76fed7dd9235 79 int _waitForCallback(
seanwilson10 0:76fed7dd9235 80 void);
seanwilson10 0:76fed7dd9235 81 };
seanwilson10 0:76fed7dd9235 82
seanwilson10 0:76fed7dd9235 83 SpiContext::SpiContext(PinName mosiPin,
seanwilson10 0:76fed7dd9235 84 PinName misoPin,
seanwilson10 0:76fed7dd9235 85 PinName sckPin,
seanwilson10 0:76fed7dd9235 86 PinName csPin,
seanwilson10 0:76fed7dd9235 87 unsigned maxSpeed)
seanwilson10 0:76fed7dd9235 88 : _spi(mosiPin, misoPin, sckPin),
seanwilson10 0:76fed7dd9235 89 _cs(csPin, 1)
seanwilson10 0:76fed7dd9235 90 {
seanwilson10 0:76fed7dd9235 91 _cbEvent = 0;
seanwilson10 0:76fed7dd9235 92 _cbFired = false;
seanwilson10 0:76fed7dd9235 93 _callback.attach(this, &SpiContext::_cbHandler);
seanwilson10 0:76fed7dd9235 94
seanwilson10 0:76fed7dd9235 95 _spi.format(ADI_SENSE_SPI_FRAME_SIZE, ADI_SENSE_SPI_MODE);
seanwilson10 0:76fed7dd9235 96 _spi.frequency(maxSpeed);
seanwilson10 0:76fed7dd9235 97 }
seanwilson10 0:76fed7dd9235 98
seanwilson10 0:76fed7dd9235 99 void SpiContext::_cbHandler(int event)
seanwilson10 0:76fed7dd9235 100 {
seanwilson10 0:76fed7dd9235 101 _cbEvent = event;
seanwilson10 0:76fed7dd9235 102 _cbFired = true;
seanwilson10 0:76fed7dd9235 103 }
seanwilson10 0:76fed7dd9235 104
seanwilson10 0:76fed7dd9235 105 int SpiContext::_waitForCallback(void)
seanwilson10 0:76fed7dd9235 106 {
seanwilson10 0:76fed7dd9235 107 int rc = 0;
seanwilson10 0:76fed7dd9235 108
seanwilson10 0:76fed7dd9235 109 while ((_cbFired != true) && (_cbEvent != SPI_EVENT_COMPLETE))
seanwilson10 0:76fed7dd9235 110 { ; }
seanwilson10 0:76fed7dd9235 111
seanwilson10 0:76fed7dd9235 112 _cbFired = false;
seanwilson10 0:76fed7dd9235 113 _cbEvent = 0;
seanwilson10 0:76fed7dd9235 114
seanwilson10 0:76fed7dd9235 115 return rc;
seanwilson10 0:76fed7dd9235 116 }
seanwilson10 0:76fed7dd9235 117
seanwilson10 0:76fed7dd9235 118 int SpiContext::transfer(
seanwilson10 0:76fed7dd9235 119 void *pTxData,
seanwilson10 0:76fed7dd9235 120 void *pRxData,
seanwilson10 0:76fed7dd9235 121 unsigned nLength,
seanwilson10 0:76fed7dd9235 122 bool bCsHold)
seanwilson10 0:76fed7dd9235 123 {
seanwilson10 0:76fed7dd9235 124 int rc = 0;
seanwilson10 0:76fed7dd9235 125
seanwilson10 0:76fed7dd9235 126 _cs = 0;
seanwilson10 0:76fed7dd9235 127
seanwilson10 0:76fed7dd9235 128 rc = _spi.transfer((uint8_t *)pTxData, nLength,
seanwilson10 0:76fed7dd9235 129 (uint8_t *)pRxData, nLength,
seanwilson10 0:76fed7dd9235 130 _callback, SPI_EVENT_COMPLETE);
seanwilson10 0:76fed7dd9235 131 if (rc < 0)
seanwilson10 0:76fed7dd9235 132 {
seanwilson10 0:76fed7dd9235 133 _cs = 1;
seanwilson10 0:76fed7dd9235 134 return rc;
seanwilson10 0:76fed7dd9235 135 }
seanwilson10 0:76fed7dd9235 136
seanwilson10 0:76fed7dd9235 137 rc = _waitForCallback();
seanwilson10 0:76fed7dd9235 138 if ((rc < 0) || !bCsHold)
seanwilson10 0:76fed7dd9235 139 _cs = 1;
seanwilson10 0:76fed7dd9235 140
seanwilson10 0:76fed7dd9235 141 return rc;
seanwilson10 0:76fed7dd9235 142 }
seanwilson10 0:76fed7dd9235 143
seanwilson10 0:76fed7dd9235 144 #ifdef __cplusplus
seanwilson10 0:76fed7dd9235 145 extern "C" {
seanwilson10 0:76fed7dd9235 146 #endif
seanwilson10 0:76fed7dd9235 147
seanwilson10 0:76fed7dd9235 148 /*
seanwilson10 0:76fed7dd9235 149 * Open the SPI interface and allocate resources
seanwilson10 0:76fed7dd9235 150 */
seanwilson10 0:76fed7dd9235 151 ADI_SENSE_RESULT adi_sense_SpiOpen(
seanwilson10 0:76fed7dd9235 152 ADI_SENSE_PLATFORM_SPI_CONFIG *pConfig,
seanwilson10 0:76fed7dd9235 153 ADI_SENSE_SPI_HANDLE *phDevice)
seanwilson10 0:76fed7dd9235 154 {
seanwilson10 0:76fed7dd9235 155 SpiContext *pCtx = new SpiContext((PinName)pConfig->mosiPin,
seanwilson10 0:76fed7dd9235 156 (PinName)pConfig->misoPin,
seanwilson10 0:76fed7dd9235 157 (PinName)pConfig->sckPin,
seanwilson10 0:76fed7dd9235 158 (PinName)pConfig->csPin,
seanwilson10 0:76fed7dd9235 159 pConfig->maxSpeedHz);
seanwilson10 0:76fed7dd9235 160 if (!pCtx)
seanwilson10 0:76fed7dd9235 161 {
seanwilson10 0:76fed7dd9235 162 ADI_SENSE_LOG_ERROR("Failed to allocate memory for SPI interface");
seanwilson10 0:76fed7dd9235 163 return ADI_SENSE_NO_MEM;
seanwilson10 0:76fed7dd9235 164 }
seanwilson10 0:76fed7dd9235 165
seanwilson10 0:76fed7dd9235 166 *phDevice = reinterpret_cast<ADI_SENSE_SPI_HANDLE>(pCtx);
seanwilson10 0:76fed7dd9235 167 return ADI_SENSE_SUCCESS;
seanwilson10 0:76fed7dd9235 168 }
seanwilson10 0:76fed7dd9235 169
seanwilson10 0:76fed7dd9235 170 /*
seanwilson10 0:76fed7dd9235 171 * Execute a bi-directional data transfer on the SPI interface
seanwilson10 0:76fed7dd9235 172 */
seanwilson10 0:76fed7dd9235 173 ADI_SENSE_RESULT
seanwilson10 0:76fed7dd9235 174 adi_sense_SpiTransfer(
seanwilson10 0:76fed7dd9235 175 ADI_SENSE_SPI_HANDLE hDevice,
seanwilson10 0:76fed7dd9235 176 void *pTxData,
seanwilson10 0:76fed7dd9235 177 void *pRxData,
seanwilson10 0:76fed7dd9235 178 unsigned nLength,
seanwilson10 0:76fed7dd9235 179 bool bCsHold)
seanwilson10 0:76fed7dd9235 180 {
seanwilson10 0:76fed7dd9235 181 SpiContext *pCtx = reinterpret_cast<SpiContext *>(hDevice);
seanwilson10 0:76fed7dd9235 182
seanwilson10 0:76fed7dd9235 183 if (pCtx->transfer(pTxData, pRxData, nLength, bCsHold) < 0)
seanwilson10 0:76fed7dd9235 184 {
seanwilson10 0:76fed7dd9235 185 ADI_SENSE_LOG_ERROR("Failed to complete SPI transfer");
seanwilson10 0:76fed7dd9235 186 return ADI_SENSE_FAILURE;
seanwilson10 0:76fed7dd9235 187 }
seanwilson10 0:76fed7dd9235 188
seanwilson10 0:76fed7dd9235 189 return ADI_SENSE_SUCCESS;
seanwilson10 0:76fed7dd9235 190 }
seanwilson10 0:76fed7dd9235 191
seanwilson10 0:76fed7dd9235 192 /*
seanwilson10 0:76fed7dd9235 193 * Close the SPI interface and free resources
seanwilson10 0:76fed7dd9235 194 */
seanwilson10 0:76fed7dd9235 195 void adi_sense_SpiClose(
seanwilson10 0:76fed7dd9235 196 ADI_SENSE_SPI_HANDLE hDevice)
seanwilson10 0:76fed7dd9235 197 {
seanwilson10 0:76fed7dd9235 198 SpiContext *pCtx = reinterpret_cast<SpiContext *>(hDevice);
seanwilson10 0:76fed7dd9235 199
seanwilson10 0:76fed7dd9235 200 delete pCtx;
seanwilson10 0:76fed7dd9235 201 }
seanwilson10 0:76fed7dd9235 202
seanwilson10 0:76fed7dd9235 203 #ifdef __cplusplus
seanwilson10 0:76fed7dd9235 204 }
seanwilson10 0:76fed7dd9235 205 #endif
seanwilson10 0:76fed7dd9235 206
seanwilson10 0:76fed7dd9235 207 /*!
seanwilson10 0:76fed7dd9235 208 * @}
seanwilson10 0:76fed7dd9235 209 */
seanwilson10 0:76fed7dd9235 210