SDMP_IOT / Mbed OS AdiSense1000_SmartBabySeat

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of Babyseat_NewFirmware_copy_sean by Ross O'Halloran

src/spi_nucleo.cpp@2:625a45555a85, 2017-08-25 (annotated)

Committer:
kevin1990
Date:
Fri Aug 25 11:17:37 2017 +0000
Revision:
2:625a45555a85
Child:
3:3796776e2c27
Sensor Channel 0 Type K example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevin1990 2:625a45555a85 1 /*!
kevin1990 2:625a45555a85 2 ******************************************************************************
kevin1990 2:625a45555a85 3 * @file: spi_nucleo.cpp
kevin1990 2:625a45555a85 4 * @brief: ADISense1000 OS Dependant wrapper layer for spi
kevin1990 2:625a45555a85 5 *-----------------------------------------------------------------------------
kevin1990 2:625a45555a85 6 *
kevin1990 2:625a45555a85 7 Copyright (c) 2017 Emutex Ltd. / Analog Devices, Inc.
kevin1990 2:625a45555a85 8
kevin1990 2:625a45555a85 9 All rights reserved.
kevin1990 2:625a45555a85 10
kevin1990 2:625a45555a85 11 Redistribution and use in source and binary forms, with or without modification,
kevin1990 2:625a45555a85 12 are permitted provided that the following conditions are met:
kevin1990 2:625a45555a85 13 - Redistributions of source code must retain the above copyright notice,
kevin1990 2:625a45555a85 14 this list of conditions and the following disclaimer.
kevin1990 2:625a45555a85 15 - Redistributions in binary form must reproduce the above copyright notice,
kevin1990 2:625a45555a85 16 this list of conditions and the following disclaimer in the documentation
kevin1990 2:625a45555a85 17 and/or other materials provided with the distribution.
kevin1990 2:625a45555a85 18 - Modified versions of the software must be conspicuously marked as such.
kevin1990 2:625a45555a85 19 - This software is licensed solely and exclusively for use with processors
kevin1990 2:625a45555a85 20 manufactured by or for Analog Devices, Inc.
kevin1990 2:625a45555a85 21 - This software may not be combined or merged with other code in any manner
kevin1990 2:625a45555a85 22 that would cause the software to become subject to terms and conditions
kevin1990 2:625a45555a85 23 which differ from those listed here.
kevin1990 2:625a45555a85 24 - Neither the name of Analog Devices, Inc. nor the names of its
kevin1990 2:625a45555a85 25 contributors may be used to endorse or promote products derived
kevin1990 2:625a45555a85 26 from this software without specific prior written permission.
kevin1990 2:625a45555a85 27 - The use of this software may or may not infringe the patent rights of one
kevin1990 2:625a45555a85 28 or more patent holders. This license does not release you from the
kevin1990 2:625a45555a85 29 requirement that you obtain separate licenses from these patent holders
kevin1990 2:625a45555a85 30 to use this software.
kevin1990 2:625a45555a85 31
kevin1990 2:625a45555a85 32 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. AND CONTRIBUTORS "AS IS" AND ANY
kevin1990 2:625a45555a85 33 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
kevin1990 2:625a45555a85 34 TITLE, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
kevin1990 2:625a45555a85 35 NO EVENT SHALL ANALOG DEVICES, INC. OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
kevin1990 2:625a45555a85 36 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES
kevin1990 2:625a45555a85 37 (INCLUDING, BUT NOT LIMITED TO, DAMAGES ARISING OUT OF CLAIMS OF INTELLECTUAL
kevin1990 2:625a45555a85 38 PROPERTY RIGHTS INFRINGEMENT; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
kevin1990 2:625a45555a85 39 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
kevin1990 2:625a45555a85 40 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
kevin1990 2:625a45555a85 41 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
kevin1990 2:625a45555a85 42 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
kevin1990 2:625a45555a85 43 *
kevin1990 2:625a45555a85 44 *****************************************************************************/
kevin1990 2:625a45555a85 45 /******************************************************************************/
kevin1990 2:625a45555a85 46 /* Include Files */
kevin1990 2:625a45555a85 47 /******************************************************************************/
kevin1990 2:625a45555a85 48 #include "inc/spi_nucleo.h"
kevin1990 2:625a45555a85 49
kevin1990 2:625a45555a85 50 #define BUFFER_SIZE 256
kevin1990 2:625a45555a85 51 #define CMD_BIT 7
kevin1990 2:625a45555a85 52
kevin1990 2:625a45555a85 53 #define SPI_MODE_0 0
kevin1990 2:625a45555a85 54 #define SPI_FRAME_SIZE_8 8
kevin1990 2:625a45555a85 55 #define SPI_CLOCK_FREQUENCY_700KHZ 700000
kevin1990 2:625a45555a85 56 #define DEVICE_SPI_ASYNCH 1
kevin1990 2:625a45555a85 57 #define TIMEOUT_3_SEC 3.0
kevin1990 2:625a45555a85 58
kevin1990 2:625a45555a85 59 // DummyByte config defines
kevin1990 2:625a45555a85 60 #define SPI_CHIP_TYPE_ADDR 0x03
kevin1990 2:625a45555a85 61 #define SPI_CHIP_TYPE_VALUE 0x07
kevin1990 2:625a45555a85 62 #define READ_CMD 0x00
kevin1990 2:625a45555a85 63 #define MAX_SYNC_ATTEMPTS 50
kevin1990 2:625a45555a85 64 #define DUMMY_BYTE_COUNT 1
kevin1990 2:625a45555a85 65
kevin1990 2:625a45555a85 66 #define CHECK_BIT(var, pos) ((var) & (1 << (pos)))
kevin1990 2:625a45555a85 67
kevin1990 2:625a45555a85 68 SPI spi(SPI_MOSI, SPI_MISO, SPI_SCK);
kevin1990 2:625a45555a85 69 DigitalOut chipSel(D10, 1);
kevin1990 2:625a45555a85 70
kevin1990 2:625a45555a85 71 event_callback_t callbck;
kevin1990 2:625a45555a85 72 Timer timeout;
kevin1990 2:625a45555a85 73
kevin1990 2:625a45555a85 74 volatile int intType;
kevin1990 2:625a45555a85 75 volatile bool cbkFired;
kevin1990 2:625a45555a85 76
kevin1990 2:625a45555a85 77 static uint8_t rxBuff[BUFFER_SIZE];
kevin1990 2:625a45555a85 78
kevin1990 2:625a45555a85 79 void callbackFired(int event)
kevin1990 2:625a45555a85 80 {
kevin1990 2:625a45555a85 81 cbkFired = true;
kevin1990 2:625a45555a85 82 intType = event;
kevin1990 2:625a45555a85 83 }
kevin1990 2:625a45555a85 84
kevin1990 2:625a45555a85 85 static int transferComplete()
kevin1990 2:625a45555a85 86 {
kevin1990 2:625a45555a85 87 int rc = 0;
kevin1990 2:625a45555a85 88
kevin1990 2:625a45555a85 89 timeout.start();
kevin1990 2:625a45555a85 90 while ((cbkFired != true) && (intType != SPI_EVENT_COMPLETE))
kevin1990 2:625a45555a85 91 {
kevin1990 2:625a45555a85 92 if (timeout.read() > TIMEOUT_3_SEC)
kevin1990 2:625a45555a85 93 {
kevin1990 2:625a45555a85 94 rc = -1;
kevin1990 2:625a45555a85 95 break;
kevin1990 2:625a45555a85 96 }
kevin1990 2:625a45555a85 97 }
kevin1990 2:625a45555a85 98 timeout.stop();
kevin1990 2:625a45555a85 99
kevin1990 2:625a45555a85 100 cbkFired = false;
kevin1990 2:625a45555a85 101 intType = 0;
kevin1990 2:625a45555a85 102
kevin1990 2:625a45555a85 103 return rc;
kevin1990 2:625a45555a85 104 }
kevin1990 2:625a45555a85 105
kevin1990 2:625a45555a85 106 static int spiWrite(uint8_t *data, uint8_t txSize, bool bCsHold)
kevin1990 2:625a45555a85 107 {
kevin1990 2:625a45555a85 108 int rc;
kevin1990 2:625a45555a85 109
kevin1990 2:625a45555a85 110 // Assert chip select
kevin1990 2:625a45555a85 111 if (!bCsHold)
kevin1990 2:625a45555a85 112 {
kevin1990 2:625a45555a85 113 chipSel = 0;
kevin1990 2:625a45555a85 114 }
kevin1990 2:625a45555a85 115
kevin1990 2:625a45555a85 116 rc = spi.transfer(data, txSize, (uint8_t *)NULL, 0,
kevin1990 2:625a45555a85 117 callbck, SPI_EVENT_COMPLETE);
kevin1990 2:625a45555a85 118
kevin1990 2:625a45555a85 119 rc = transferComplete();
kevin1990 2:625a45555a85 120
kevin1990 2:625a45555a85 121 // De assert chip select
kevin1990 2:625a45555a85 122 if (!bCsHold)
kevin1990 2:625a45555a85 123 {
kevin1990 2:625a45555a85 124 chipSel = 1;
kevin1990 2:625a45555a85 125 }
kevin1990 2:625a45555a85 126
kevin1990 2:625a45555a85 127 return rc;
kevin1990 2:625a45555a85 128 }
kevin1990 2:625a45555a85 129
kevin1990 2:625a45555a85 130 static int spiRead(uint8_t *data, uint16_t rxSize, bool bCsHold)
kevin1990 2:625a45555a85 131 {
kevin1990 2:625a45555a85 132 int rc;
kevin1990 2:625a45555a85 133
kevin1990 2:625a45555a85 134 // Assert chip select
kevin1990 2:625a45555a85 135 chipSel = 0;
kevin1990 2:625a45555a85 136
kevin1990 2:625a45555a85 137 // Send read command address
kevin1990 2:625a45555a85 138 rc = spi.transfer(data, REG_CMD_SIZE, (uint8_t *)NULL, 0,
kevin1990 2:625a45555a85 139 callbck, SPI_EVENT_COMPLETE);
kevin1990 2:625a45555a85 140
kevin1990 2:625a45555a85 141 rc = transferComplete();
kevin1990 2:625a45555a85 142
kevin1990 2:625a45555a85 143 if (rc < 0)
kevin1990 2:625a45555a85 144 {
kevin1990 2:625a45555a85 145 chipSel = 1;
kevin1990 2:625a45555a85 146 return rc;
kevin1990 2:625a45555a85 147 }
kevin1990 2:625a45555a85 148
kevin1990 2:625a45555a85 149 for (int i = 0; i < DUMMY_BYTE_COUNT; i++) {
kevin1990 2:625a45555a85 150 rc = spi.write(0);
kevin1990 2:625a45555a85 151 }
kevin1990 2:625a45555a85 152
kevin1990 2:625a45555a85 153 // Retrieve data from slave
kevin1990 2:625a45555a85 154 rc = spi.transfer((uint8_t *)NULL, rxSize, rxBuff, rxSize,
kevin1990 2:625a45555a85 155 callbck, SPI_EVENT_COMPLETE);
kevin1990 2:625a45555a85 156
kevin1990 2:625a45555a85 157 rc = transferComplete();
kevin1990 2:625a45555a85 158
kevin1990 2:625a45555a85 159 if (rc < 0)
kevin1990 2:625a45555a85 160 {
kevin1990 2:625a45555a85 161 chipSel = 1;
kevin1990 2:625a45555a85 162 return rc;
kevin1990 2:625a45555a85 163 }
kevin1990 2:625a45555a85 164
kevin1990 2:625a45555a85 165 // De assert chip select
kevin1990 2:625a45555a85 166 if (!bCsHold)
kevin1990 2:625a45555a85 167 {
kevin1990 2:625a45555a85 168 chipSel = 1;
kevin1990 2:625a45555a85 169 }
kevin1990 2:625a45555a85 170
kevin1990 2:625a45555a85 171 return rc;
kevin1990 2:625a45555a85 172 }
kevin1990 2:625a45555a85 173
kevin1990 2:625a45555a85 174 static int syncWithAdisense1000()
kevin1990 2:625a45555a85 175 {
kevin1990 2:625a45555a85 176 uint8_t txBuff[20];
kevin1990 2:625a45555a85 177 uint8_t nRxLen = 1;
kevin1990 2:625a45555a85 178 bool bCsHoldOff = false;
kevin1990 2:625a45555a85 179 uint16_t nAttempts = 0;
kevin1990 2:625a45555a85 180
kevin1990 2:625a45555a85 181 memset(txBuff, 0, sizeof(txBuff));
kevin1990 2:625a45555a85 182
kevin1990 2:625a45555a85 183 txBuff[0] = READ_CMD;
kevin1990 2:625a45555a85 184 txBuff[1] = SPI_CHIP_TYPE_ADDR;
kevin1990 2:625a45555a85 185
kevin1990 2:625a45555a85 186 while (rxBuff[0] != SPI_CHIP_TYPE_VALUE)
kevin1990 2:625a45555a85 187 {
kevin1990 2:625a45555a85 188 if(spiRead(txBuff, nRxLen, bCsHoldOff) < 0)
kevin1990 2:625a45555a85 189 {
kevin1990 2:625a45555a85 190 return -1;
kevin1990 2:625a45555a85 191 }
kevin1990 2:625a45555a85 192
kevin1990 2:625a45555a85 193 if (nAttempts >= MAX_SYNC_ATTEMPTS)
kevin1990 2:625a45555a85 194 {
kevin1990 2:625a45555a85 195 return -1;
kevin1990 2:625a45555a85 196 }
kevin1990 2:625a45555a85 197
kevin1990 2:625a45555a85 198 nAttempts++;
kevin1990 2:625a45555a85 199 wait_ms(100);
kevin1990 2:625a45555a85 200 }
kevin1990 2:625a45555a85 201 /* TODO: Reminder not to forget about the following routine which was previously
kevin1990 2:625a45555a85 202 used: Not valid currently as we are hardcoding the dummy byte count
kevin1990 2:625a45555a85 203 This is a temporary fix until we have a defined spi protocall.
kevin1990 2:625a45555a85 204 This function reads the spi chip type (fixed value) and determines how many
kevin1990 2:625a45555a85 205 dummy bytes need to be sent in a spi read transaction.
kevin1990 2:625a45555a85 206 The dummy bytes varies depending on clock speed, debug/release build on
kevin1990 2:625a45555a85 207 adisense, and will keep varying as the code grows. So this elimantes the need
kevin1990 2:625a45555a85 208 to manually modify the dummy bytes.
kevin1990 2:625a45555a85 209 */
kevin1990 2:625a45555a85 210
kevin1990 2:625a45555a85 211 return 0;
kevin1990 2:625a45555a85 212 }
kevin1990 2:625a45555a85 213
kevin1990 2:625a45555a85 214 /*!
kevin1990 2:625a45555a85 215 * @brief Register a new spi connection
kevin1990 2:625a45555a85 216 *
kevin1990 2:625a45555a85 217 * @param[in] spiConfig spi settings for connection
kevin1990 2:625a45555a85 218 *
kevin1990 2:625a45555a85 219 * @return Status
kevin1990 2:625a45555a85 220 * - #ADI_SENSE_SUCCESS Call completed successfully.
kevin1990 2:625a45555a85 221 * - todo
kevin1990 2:625a45555a85 222 *
kevin1990 2:625a45555a85 223 */
kevin1990 2:625a45555a85 224 ADI_SENSE_RESULT ADISense1000_HostSpiOpen(spiSettings spiConfig)
kevin1990 2:625a45555a85 225 {
kevin1990 2:625a45555a85 226 /*
kevin1990 2:625a45555a85 227 For v0.1 we are using the mbed api.
kevin1990 2:625a45555a85 228 The digital classes are declared globally.
kevin1990 2:625a45555a85 229 Parameters are placeholders for future revisions.
kevin1990 2:625a45555a85 230 */
kevin1990 2:625a45555a85 231
kevin1990 2:625a45555a85 232 cbkFired = false;
kevin1990 2:625a45555a85 233 intType = 0;
kevin1990 2:625a45555a85 234
kevin1990 2:625a45555a85 235 callbck.attach(callbackFired);
kevin1990 2:625a45555a85 236
kevin1990 2:625a45555a85 237 spi.format(SPI_FRAME_SIZE_8, SPI_MODE_0);
kevin1990 2:625a45555a85 238 spi.frequency(SPI_CLOCK_FREQUENCY_700KHZ);
kevin1990 2:625a45555a85 239
kevin1990 2:625a45555a85 240 if (syncWithAdisense1000() != ADI_SENSE_SUCCESS)
kevin1990 2:625a45555a85 241 return ADI_SENSE_FAILURE;
kevin1990 2:625a45555a85 242
kevin1990 2:625a45555a85 243 return ADI_SENSE_SUCCESS;
kevin1990 2:625a45555a85 244 }
kevin1990 2:625a45555a85 245
kevin1990 2:625a45555a85 246 /*!
kevin1990 2:625a45555a85 247 * @brief Transfer data to slave device
kevin1990 2:625a45555a85 248 *
kevin1990 2:625a45555a85 249 * @param[in] pData array with transfer data
kevin1990 2:625a45555a85 250 * @param[in] nTxLen number of bytes to transfer
kevin1990 2:625a45555a85 251 * @param[in] bCsHold keep cs high/low after transfer
kevin1990 2:625a45555a85 252 *
kevin1990 2:625a45555a85 253 * @return Status
kevin1990 2:625a45555a85 254 * - #ADI_SENSE_SUCCESS Call completed successfully.
kevin1990 2:625a45555a85 255 * - todo
kevin1990 2:625a45555a85 256 *
kevin1990 2:625a45555a85 257 */
kevin1990 2:625a45555a85 258 ADI_SENSE_RESULT
kevin1990 2:625a45555a85 259 ADISense1000_HostSpiTransfer(uint8_t *pData, uint16_t nTxLen, bool bCsHold)
kevin1990 2:625a45555a85 260 {
kevin1990 2:625a45555a85 261 int txWrite = CHECK_BIT(pData[0], CMD_BIT);
kevin1990 2:625a45555a85 262
kevin1990 2:625a45555a85 263 if (txWrite)
kevin1990 2:625a45555a85 264 {
kevin1990 2:625a45555a85 265 if (spiWrite(pData, nTxLen, bCsHold) < 0)
kevin1990 2:625a45555a85 266 return ADI_SENSE_FAILURE;
kevin1990 2:625a45555a85 267 else
kevin1990 2:625a45555a85 268 return ADI_SENSE_SUCCESS;
kevin1990 2:625a45555a85 269 }
kevin1990 2:625a45555a85 270
kevin1990 2:625a45555a85 271 if(spiRead(pData, nTxLen, bCsHold) < 0)
kevin1990 2:625a45555a85 272 return ADI_SENSE_FAILURE;
kevin1990 2:625a45555a85 273
kevin1990 2:625a45555a85 274 memcpy(pData, rxBuff, nTxLen);
kevin1990 2:625a45555a85 275
kevin1990 2:625a45555a85 276 return ADI_SENSE_SUCCESS;
kevin1990 2:625a45555a85 277 }
kevin1990 2:625a45555a85 278
kevin1990 2:625a45555a85 279
kevin1990 2:625a45555a85 280 /*!
kevin1990 2:625a45555a85 281 * @brief Close spi connection
kevin1990 2:625a45555a85 282 *
kevin1990 2:625a45555a85 283 * @param[in]
kevin1990 2:625a45555a85 284 *
kevin1990 2:625a45555a85 285 * @return Status
kevin1990 2:625a45555a85 286 * - #ADI_SENSE_SUCCESS Call completed successfully.
kevin1990 2:625a45555a85 287 * - todo
kevin1990 2:625a45555a85 288 *
kevin1990 2:625a45555a85 289 */
kevin1990 2:625a45555a85 290 ADI_SENSE_RESULT ADISense1000_HostSpiClose()
kevin1990 2:625a45555a85 291 {
kevin1990 2:625a45555a85 292 return ADI_SENSE_SUCCESS;
kevin1990 2:625a45555a85 293 }
kevin1990 2:625a45555a85 294 /**
kevin1990 2:625a45555a85 295 * @}
kevin1990 2:625a45555a85 296 */
kevin1990 2:625a45555a85 297