Rohan Gurav / Mbed OS Sean_AdiSense1000_V21

ADISense1000 Version 2.1 code base

Fork of AdiSense1000_V21 by Sean Wilson

src/mbed/adi_sense_spi.cpp@33:640b6bebda17, 2018-09-18 (annotated)

Committer:
RGurav
Date:
Tue Sep 18 16:46:40 2018 +0000
Revision:
33:640b6bebda17
Parent:
28:4eb837cd71df
Child:
31:de49744b57a6
ADISense1000 Version 2.1 code base

Who changed what in which revision?

UserRevisionLine numberNew contents of line
danodonovan 26:12d0204be712 1 /******************************************************************************
danodonovan 26:12d0204be712 2 Copyright 2017 (c) Analog Devices, Inc.
danodonovan 26:12d0204be712 3
danodonovan 26:12d0204be712 4 All rights reserved.
danodonovan 26:12d0204be712 5
danodonovan 26:12d0204be712 6 Redistribution and use in source and binary forms, with or without
danodonovan 26:12d0204be712 7 modification, are permitted provided that the following conditions are met:
danodonovan 26:12d0204be712 8 - Redistributions of source code must retain the above copyright
danodonovan 26:12d0204be712 9 notice, this list of conditions and the following disclaimer.
danodonovan 26:12d0204be712 10 - Redistributions in binary form must reproduce the above copyright
danodonovan 26:12d0204be712 11 notice, this list of conditions and the following disclaimer in
danodonovan 26:12d0204be712 12 the documentation and/or other materials provided with the
danodonovan 26:12d0204be712 13 distribution.
danodonovan 26:12d0204be712 14 - Neither the name of Analog Devices, Inc. nor the names of its
danodonovan 26:12d0204be712 15 contributors may be used to endorse or promote products derived
danodonovan 26:12d0204be712 16 from this software without specific prior written permission.
danodonovan 26:12d0204be712 17 - The use of this software may or may not infringe the patent rights
danodonovan 26:12d0204be712 18 of one or more patent holders. This license does not release you
danodonovan 26:12d0204be712 19 from the requirement that you obtain separate licenses from these
danodonovan 26:12d0204be712 20 patent holders to use this software.
danodonovan 26:12d0204be712 21 - Use of the software either in source or binary form, must be run
danodonovan 26:12d0204be712 22 on or directly connected to an Analog Devices Inc. component.
danodonovan 26:12d0204be712 23
danodonovan 26:12d0204be712 24 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
danodonovan 26:12d0204be712 25 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
danodonovan 26:12d0204be712 26 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
danodonovan 26:12d0204be712 27 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
danodonovan 26:12d0204be712 28 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
danodonovan 26:12d0204be712 29 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
danodonovan 26:12d0204be712 30 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
danodonovan 26:12d0204be712 31 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
danodonovan 26:12d0204be712 32 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
danodonovan 26:12d0204be712 33 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
danodonovan 26:12d0204be712 34 *
danodonovan 26:12d0204be712 35 *****************************************************************************/
danodonovan 26:12d0204be712 36
kevin1990 28:4eb837cd71df 37 /*!
kevin1990 28:4eb837cd71df 38 ******************************************************************************
kevin1990 28:4eb837cd71df 39 * @file:
kevin1990 28:4eb837cd71df 40 * @brief: ADISENSE OS-dependent wrapper layer for SPI interface
kevin1990 28:4eb837cd71df 41 *-----------------------------------------------------------------------------
kevin1990 28:4eb837cd71df 42 */
kevin1990 28:4eb837cd71df 43
danodonovan 26:12d0204be712 44 #include <mbed.h>
danodonovan 26:12d0204be712 45
danodonovan 26:12d0204be712 46 #include "inc/adi_sense_spi.h"
danodonovan 26:12d0204be712 47 #include "inc/adi_sense_log.h"
danodonovan 26:12d0204be712 48
danodonovan 26:12d0204be712 49 #define ADI_SENSE_SPI_MODE 0 /* CPOL=0, CPHA=0 */
danodonovan 26:12d0204be712 50 #define ADI_SENSE_SPI_FRAME_SIZE 8 /* 8-bit frame size */
danodonovan 26:12d0204be712 51
danodonovan 26:12d0204be712 52 class SpiContext
danodonovan 26:12d0204be712 53 {
danodonovan 26:12d0204be712 54 public:
danodonovan 26:12d0204be712 55 SpiContext(
danodonovan 26:12d0204be712 56 PinName mosiPin,
danodonovan 26:12d0204be712 57 PinName misoPin,
danodonovan 26:12d0204be712 58 PinName sckPin,
danodonovan 26:12d0204be712 59 PinName csPin,
danodonovan 26:12d0204be712 60 unsigned maxSpeed);
danodonovan 26:12d0204be712 61
danodonovan 26:12d0204be712 62 int transfer(
danodonovan 26:12d0204be712 63 void *pTxData,
danodonovan 26:12d0204be712 64 void *pRxData,
danodonovan 26:12d0204be712 65 unsigned nLength,
danodonovan 26:12d0204be712 66 bool bCsHold);
danodonovan 26:12d0204be712 67
danodonovan 26:12d0204be712 68 private:
danodonovan 26:12d0204be712 69 SPI _spi;
danodonovan 26:12d0204be712 70 DigitalOut _cs;
danodonovan 26:12d0204be712 71
danodonovan 26:12d0204be712 72 event_callback_t _callback;
danodonovan 26:12d0204be712 73 volatile int _cbEvent;
danodonovan 26:12d0204be712 74 volatile bool _cbFired;
danodonovan 26:12d0204be712 75
danodonovan 26:12d0204be712 76 void _cbHandler(
danodonovan 26:12d0204be712 77 int event);
danodonovan 26:12d0204be712 78
danodonovan 26:12d0204be712 79 int _waitForCallback(
danodonovan 26:12d0204be712 80 void);
danodonovan 26:12d0204be712 81 };
danodonovan 26:12d0204be712 82
danodonovan 26:12d0204be712 83 SpiContext::SpiContext(PinName mosiPin,
danodonovan 26:12d0204be712 84 PinName misoPin,
danodonovan 26:12d0204be712 85 PinName sckPin,
danodonovan 26:12d0204be712 86 PinName csPin,
danodonovan 26:12d0204be712 87 unsigned maxSpeed)
danodonovan 26:12d0204be712 88 : _spi(mosiPin, misoPin, sckPin),
danodonovan 26:12d0204be712 89 _cs(csPin, 1)
danodonovan 26:12d0204be712 90 {
danodonovan 26:12d0204be712 91 _cbEvent = 0;
danodonovan 26:12d0204be712 92 _cbFired = false;
danodonovan 26:12d0204be712 93 _callback = callback(this, &SpiContext::_cbHandler);
danodonovan 26:12d0204be712 94
danodonovan 26:12d0204be712 95 _spi.format(ADI_SENSE_SPI_FRAME_SIZE, ADI_SENSE_SPI_MODE);
danodonovan 26:12d0204be712 96 _spi.frequency(maxSpeed);
danodonovan 26:12d0204be712 97 }
danodonovan 26:12d0204be712 98
danodonovan 26:12d0204be712 99 void SpiContext::_cbHandler(int event)
danodonovan 26:12d0204be712 100 {
danodonovan 26:12d0204be712 101 _cbEvent = event;
danodonovan 26:12d0204be712 102 _cbFired = true;
danodonovan 26:12d0204be712 103 }
danodonovan 26:12d0204be712 104
danodonovan 26:12d0204be712 105 int SpiContext::_waitForCallback(void)
danodonovan 26:12d0204be712 106 {
danodonovan 26:12d0204be712 107 int rc = 0;
danodonovan 26:12d0204be712 108
danodonovan 26:12d0204be712 109 while ((_cbFired != true) && (_cbEvent != SPI_EVENT_COMPLETE))
danodonovan 26:12d0204be712 110 { ; }
danodonovan 26:12d0204be712 111
danodonovan 26:12d0204be712 112 _cbFired = false;
danodonovan 26:12d0204be712 113 _cbEvent = 0;
danodonovan 26:12d0204be712 114
danodonovan 26:12d0204be712 115 return rc;
danodonovan 26:12d0204be712 116 }
danodonovan 26:12d0204be712 117
danodonovan 26:12d0204be712 118 int SpiContext::transfer(
danodonovan 26:12d0204be712 119 void *pTxData,
danodonovan 26:12d0204be712 120 void *pRxData,
danodonovan 26:12d0204be712 121 unsigned nLength,
danodonovan 26:12d0204be712 122 bool bCsHold)
danodonovan 26:12d0204be712 123 {
danodonovan 26:12d0204be712 124 int rc = 0;
danodonovan 26:12d0204be712 125
danodonovan 26:12d0204be712 126 _cs = 0;
danodonovan 26:12d0204be712 127
danodonovan 26:12d0204be712 128 rc = _spi.transfer((uint8_t *)pTxData, nLength,
danodonovan 26:12d0204be712 129 (uint8_t *)pRxData, nLength,
danodonovan 26:12d0204be712 130 _callback, SPI_EVENT_COMPLETE);
danodonovan 26:12d0204be712 131 if (rc < 0)
danodonovan 26:12d0204be712 132 {
danodonovan 26:12d0204be712 133 _cs = 1;
danodonovan 26:12d0204be712 134 return rc;
kevin1990 28:4eb837cd71df 135 }
danodonovan 26:12d0204be712 136
danodonovan 26:12d0204be712 137 rc = _waitForCallback();
danodonovan 26:12d0204be712 138 if ((rc < 0) || !bCsHold)
danodonovan 26:12d0204be712 139 _cs = 1;
danodonovan 26:12d0204be712 140
danodonovan 26:12d0204be712 141 return rc;
danodonovan 26:12d0204be712 142 }
danodonovan 26:12d0204be712 143
danodonovan 26:12d0204be712 144 #ifdef __cplusplus
danodonovan 26:12d0204be712 145 extern "C" {
danodonovan 26:12d0204be712 146 #endif
danodonovan 26:12d0204be712 147
danodonovan 26:12d0204be712 148 /*
danodonovan 26:12d0204be712 149 * Open the SPI interface and allocate resources
danodonovan 26:12d0204be712 150 */
danodonovan 26:12d0204be712 151 ADI_SENSE_RESULT adi_sense_SpiOpen(
danodonovan 26:12d0204be712 152 ADI_SENSE_PLATFORM_SPI_CONFIG *pConfig,
danodonovan 26:12d0204be712 153 ADI_SENSE_SPI_HANDLE *phDevice)
danodonovan 26:12d0204be712 154 {
danodonovan 26:12d0204be712 155 SpiContext *pCtx = new SpiContext((PinName)pConfig->mosiPin,
danodonovan 26:12d0204be712 156 (PinName)pConfig->misoPin,
danodonovan 26:12d0204be712 157 (PinName)pConfig->sckPin,
danodonovan 26:12d0204be712 158 (PinName)pConfig->csPin,
danodonovan 26:12d0204be712 159 pConfig->maxSpeedHz);
danodonovan 26:12d0204be712 160 if (!pCtx)
danodonovan 26:12d0204be712 161 {
danodonovan 26:12d0204be712 162 ADI_SENSE_LOG_ERROR("Failed to allocate memory for SPI interface");
danodonovan 26:12d0204be712 163 return ADI_SENSE_NO_MEM;
danodonovan 26:12d0204be712 164 }
danodonovan 26:12d0204be712 165
danodonovan 26:12d0204be712 166 *phDevice = reinterpret_cast<ADI_SENSE_SPI_HANDLE>(pCtx);
danodonovan 26:12d0204be712 167 return ADI_SENSE_SUCCESS;
danodonovan 26:12d0204be712 168 }
danodonovan 26:12d0204be712 169
danodonovan 26:12d0204be712 170 /*
danodonovan 26:12d0204be712 171 * Execute a bi-directional data transfer on the SPI interface
danodonovan 26:12d0204be712 172 */
danodonovan 26:12d0204be712 173 ADI_SENSE_RESULT
danodonovan 26:12d0204be712 174 adi_sense_SpiTransfer(
danodonovan 26:12d0204be712 175 ADI_SENSE_SPI_HANDLE hDevice,
danodonovan 26:12d0204be712 176 void *pTxData,
danodonovan 26:12d0204be712 177 void *pRxData,
danodonovan 26:12d0204be712 178 unsigned nLength,
danodonovan 26:12d0204be712 179 bool bCsHold)
danodonovan 26:12d0204be712 180 {
danodonovan 26:12d0204be712 181 SpiContext *pCtx = reinterpret_cast<SpiContext *>(hDevice);
danodonovan 26:12d0204be712 182
danodonovan 26:12d0204be712 183 if (pCtx->transfer(pTxData, pRxData, nLength, bCsHold) < 0)
danodonovan 26:12d0204be712 184 {
danodonovan 26:12d0204be712 185 ADI_SENSE_LOG_ERROR("Failed to complete SPI transfer");
danodonovan 26:12d0204be712 186 return ADI_SENSE_FAILURE;
danodonovan 26:12d0204be712 187 }
danodonovan 26:12d0204be712 188
danodonovan 26:12d0204be712 189 return ADI_SENSE_SUCCESS;
danodonovan 26:12d0204be712 190 }
danodonovan 26:12d0204be712 191
danodonovan 26:12d0204be712 192 /*
danodonovan 26:12d0204be712 193 * Close the SPI interface and free resources
danodonovan 26:12d0204be712 194 */
danodonovan 26:12d0204be712 195 void adi_sense_SpiClose(
danodonovan 26:12d0204be712 196 ADI_SENSE_SPI_HANDLE hDevice)
danodonovan 26:12d0204be712 197 {
danodonovan 26:12d0204be712 198 SpiContext *pCtx = reinterpret_cast<SpiContext *>(hDevice);
danodonovan 26:12d0204be712 199
danodonovan 26:12d0204be712 200 delete pCtx;
danodonovan 26:12d0204be712 201 }
danodonovan 26:12d0204be712 202
danodonovan 26:12d0204be712 203 #ifdef __cplusplus
danodonovan 26:12d0204be712 204 }
danodonovan 26:12d0204be712 205 #endif
danodonovan 26:12d0204be712 206
danodonovan 26:12d0204be712 207 /*!
danodonovan 26:12d0204be712 208 * @}
danodonovan 26:12d0204be712 209 */