Antonio Vilei / X_NUCLEO_IDB0XA1

BLE_API wrapper library for STMicroelectronics' BlueNRG Bluetooth Low Energy expansion board shield

Fork of X_NUCLEO_IDB0XA1 by ST Expansion SW Team

source/BlueNRGDevice.cpp@173:821942ac7d5a, 2015-11-10 (annotated)

Committer:
Wolfgang Betz
Date:
Tue Nov 10 06:25:29 2015 +0100
Revision:
173:821942ac7d5a
Parent:
169:485bbcddf0c3
Child:
179:3bc6d59b9c81
Move BlueNRG irq/glitch workaround to 'x-nucleo-idb0xa1'

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Wolfgang Betz 130:770ce14d3d15 1 /* mbed Microcontroller Library
Wolfgang Betz 130:770ce14d3d15 2 * Copyright (c) 2006-2013 ARM Limited
Wolfgang Betz 130:770ce14d3d15 3 *
Wolfgang Betz 130:770ce14d3d15 4 * Licensed under the Apache License, Version 2.0 (the "License");
Wolfgang Betz 130:770ce14d3d15 5 * you may not use this file except in compliance with the License.
Wolfgang Betz 130:770ce14d3d15 6 * You may obtain a copy of the License at
Wolfgang Betz 130:770ce14d3d15 7 *
Wolfgang Betz 130:770ce14d3d15 8 * http://www.apache.org/licenses/LICENSE-2.0
Wolfgang Betz 130:770ce14d3d15 9 *
Wolfgang Betz 130:770ce14d3d15 10 * Unless required by applicable law or agreed to in writing, software
Wolfgang Betz 130:770ce14d3d15 11 * distributed under the License is distributed on an "AS IS" BASIS,
Wolfgang Betz 130:770ce14d3d15 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Wolfgang Betz 130:770ce14d3d15 13 * See the License for the specific language governing permissions and
Wolfgang Betz 130:770ce14d3d15 14 * limitations under the License.
Wolfgang Betz 130:770ce14d3d15 15 */
Wolfgang Betz 130:770ce14d3d15 16
Wolfgang Betz 130:770ce14d3d15 17 /**
Wolfgang Betz 130:770ce14d3d15 18 ******************************************************************************
Wolfgang Betz 130:770ce14d3d15 19 * @file BlueNRGDevice.cpp
Wolfgang Betz 130:770ce14d3d15 20 * @author STMicroelectronics
Wolfgang Betz 130:770ce14d3d15 21 * @brief Implementation of BLEDeviceInstanceBase
Wolfgang Betz 130:770ce14d3d15 22 ******************************************************************************
Wolfgang Betz 130:770ce14d3d15 23 * @copy
Wolfgang Betz 130:770ce14d3d15 24 *
Wolfgang Betz 130:770ce14d3d15 25 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
Wolfgang Betz 130:770ce14d3d15 26 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
Wolfgang Betz 130:770ce14d3d15 27 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
Wolfgang Betz 130:770ce14d3d15 28 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
Wolfgang Betz 130:770ce14d3d15 29 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
Wolfgang Betz 130:770ce14d3d15 30 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
Wolfgang Betz 130:770ce14d3d15 31 *
Wolfgang Betz 130:770ce14d3d15 32 * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
Wolfgang Betz 130:770ce14d3d15 33 */
Wolfgang Betz 130:770ce14d3d15 34
Wolfgang Betz 130:770ce14d3d15 35 /** @defgroup BlueNRGDevice
Wolfgang Betz 130:770ce14d3d15 36 * @brief BlueNRG BLE_API Device Adaptation
Wolfgang Betz 130:770ce14d3d15 37 * @{
Wolfgang Betz 130:770ce14d3d15 38 */
Wolfgang Betz 130:770ce14d3d15 39
Wolfgang Betz 144:bdf5e8432131 40 #include "mbed-drivers/mbed.h"
Wolfgang Betz 130:770ce14d3d15 41 #include "BlueNRGDevice.h"
Wolfgang Betz 130:770ce14d3d15 42 #include "BlueNRGGap.h"
Wolfgang Betz 130:770ce14d3d15 43 #include "BlueNRGGattServer.h"
Wolfgang Betz 130:770ce14d3d15 44
Wolfgang Betz 130:770ce14d3d15 45 #include "btle.h"
Wolfgang Betz 130:770ce14d3d15 46 #include "Utils.h"
Wolfgang Betz 130:770ce14d3d15 47 #include "osal.h"
Wolfgang Betz 130:770ce14d3d15 48
Wolfgang Betz 130:770ce14d3d15 49 #include "debug.h"
Wolfgang Betz 130:770ce14d3d15 50 #include "stm32_bluenrg_ble.h"
Wolfgang Betz 130:770ce14d3d15 51
Wolfgang Betz 130:770ce14d3d15 52 extern "C" {
Wolfgang Betz 130:770ce14d3d15 53 #include "hci.h"
Wolfgang Betz 130:770ce14d3d15 54 }
Wolfgang Betz 130:770ce14d3d15 55
Wolfgang Betz 130:770ce14d3d15 56 #define HEADER_SIZE 5
Wolfgang Betz 130:770ce14d3d15 57 #define MAX_BUFFER_SIZE 255
Wolfgang Betz 130:770ce14d3d15 58
Wolfgang Betz 130:770ce14d3d15 59 /**
Wolfgang Betz 130:770ce14d3d15 60 * The singleton which represents the BlueNRG transport for the BLEDevice.
Wolfgang Betz 130:770ce14d3d15 61 *
Wolfgang Betz 130:770ce14d3d15 62 * See file 'x_nucleo_idb0xa1_targets.h' for details regarding the peripheral pins used!
Wolfgang Betz 130:770ce14d3d15 63 */
Wolfgang Betz 130:770ce14d3d15 64 #include "x_nucleo_idb0xa1_targets.h"
Wolfgang Betz 130:770ce14d3d15 65
Wolfgang Betz 130:770ce14d3d15 66 BlueNRGDevice bluenrgDeviceInstance(IDB0XA1_PIN_SPI_MOSI,
Wolfgang Betz 130:770ce14d3d15 67 IDB0XA1_PIN_SPI_MISO,
Wolfgang Betz 130:770ce14d3d15 68 IDB0XA1_PIN_SPI_SCK,
Wolfgang Betz 130:770ce14d3d15 69 IDB0XA1_PIN_SPI_nCS,
Wolfgang Betz 130:770ce14d3d15 70 IDB0XA1_PIN_SPI_RESET,
Wolfgang Betz 130:770ce14d3d15 71 IDB0XA1_PIN_SPI_IRQ);
Wolfgang Betz 130:770ce14d3d15 72
Wolfgang Betz 130:770ce14d3d15 73 /**
Wolfgang Betz 130:770ce14d3d15 74 * BLE-API requires an implementation of the following function in order to
Wolfgang Betz 130:770ce14d3d15 75 * obtain its transport handle.
Wolfgang Betz 130:770ce14d3d15 76 */
Wolfgang Betz 130:770ce14d3d15 77 BLEInstanceBase *
Wolfgang Betz 130:770ce14d3d15 78 createBLEInstance(void)
Wolfgang Betz 130:770ce14d3d15 79 {
Wolfgang Betz 130:770ce14d3d15 80 return (&bluenrgDeviceInstance);
Wolfgang Betz 130:770ce14d3d15 81 }
Wolfgang Betz 130:770ce14d3d15 82
Wolfgang Betz 130:770ce14d3d15 83 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 84 /**
Wolfgang Betz 130:770ce14d3d15 85 @brief Constructor
Wolfgang Betz 130:770ce14d3d15 86 * @param mosi mbed pin to use for MOSI line of SPI interface
Wolfgang Betz 130:770ce14d3d15 87 * @param miso mbed pin to use for MISO line of SPI interface
Wolfgang Betz 130:770ce14d3d15 88 * @param sck mbed pin to use for SCK line of SPI interface
Wolfgang Betz 130:770ce14d3d15 89 * @param cs mbed pin to use for not chip select line of SPI interface
Wolfgang Betz 130:770ce14d3d15 90 * @param rst mbed pin to use for BlueNRG reset
Wolfgang Betz 130:770ce14d3d15 91 * @param irq mbed pin for BlueNRG IRQ
Wolfgang Betz 130:770ce14d3d15 92 */
Wolfgang Betz 130:770ce14d3d15 93 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 94 BlueNRGDevice::BlueNRGDevice(PinName mosi,
Wolfgang Betz 130:770ce14d3d15 95 PinName miso,
Wolfgang Betz 130:770ce14d3d15 96 PinName sck,
Wolfgang Betz 130:770ce14d3d15 97 PinName cs,
Wolfgang Betz 130:770ce14d3d15 98 PinName rst,
Wolfgang Betz 168:ad1dff5dca1f 99 PinName irq) :
Wolfgang Betz 168:ad1dff5dca1f 100 isInitialized(false), spi_(mosi, miso, sck), nCS_(cs), rst_(rst), irq_(irq)
Wolfgang Betz 130:770ce14d3d15 101 {
Wolfgang Betz 130:770ce14d3d15 102 // Setup the spi for 8 bit data, low clock polarity,
Wolfgang Betz 130:770ce14d3d15 103 // 1-edge phase, with an 8MHz clock rate
Wolfgang Betz 130:770ce14d3d15 104 spi_.format(8, 0);
Wolfgang Betz 130:770ce14d3d15 105 spi_.frequency(8000000);
Wolfgang Betz 130:770ce14d3d15 106
Wolfgang Betz 130:770ce14d3d15 107 // Deselect the BlueNRG chip by keeping its nCS signal high
Wolfgang Betz 130:770ce14d3d15 108 nCS_ = 1;
Wolfgang Betz 130:770ce14d3d15 109
Wolfgang Betz 130:770ce14d3d15 110 wait_us(500);
Wolfgang Betz 130:770ce14d3d15 111 }
Wolfgang Betz 130:770ce14d3d15 112
Wolfgang Betz 130:770ce14d3d15 113 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 114 /**
Wolfgang Betz 130:770ce14d3d15 115 @brief Destructor
Wolfgang Betz 130:770ce14d3d15 116 */
Wolfgang Betz 130:770ce14d3d15 117 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 118 BlueNRGDevice::~BlueNRGDevice(void)
Wolfgang Betz 130:770ce14d3d15 119 {
Wolfgang Betz 130:770ce14d3d15 120 }
Wolfgang Betz 130:770ce14d3d15 121
Wolfgang Betz 130:770ce14d3d15 122
Wolfgang Betz 130:770ce14d3d15 123 /**
Wolfgang Betz 130:770ce14d3d15 124 @brief Initialises anything required to start using BLE
Wolfgang Betz 130:770ce14d3d15 125 @param[in] void
Wolfgang Betz 130:770ce14d3d15 126 @returns ble_error_t
Wolfgang Betz 130:770ce14d3d15 127 */
Andrea Palmieri 167:abc42e7158a6 128 ble_error_t BlueNRGDevice::init(BLE::InstanceID_t instanceID, FunctionPointerWithContext<BLE::InitializationCompleteCallbackContext *> callback)
Wolfgang Betz 130:770ce14d3d15 129 {
Andrea Palmieri 167:abc42e7158a6 130 if (isInitialized) {
Andrea Palmieri 167:abc42e7158a6 131 BLE::InitializationCompleteCallbackContext context = {
Andrea Palmieri 167:abc42e7158a6 132 BLE::Instance(instanceID),
Andrea Palmieri 167:abc42e7158a6 133 BLE_ERROR_ALREADY_INITIALIZED
Andrea Palmieri 167:abc42e7158a6 134 };
Andrea Palmieri 167:abc42e7158a6 135 callback.call(&context);
Andrea Palmieri 167:abc42e7158a6 136 return BLE_ERROR_ALREADY_INITIALIZED;
Andrea Palmieri 167:abc42e7158a6 137 }
Andrea Palmieri 167:abc42e7158a6 138
Wolfgang Betz 130:770ce14d3d15 139 // Set the interrupt handler for the device
Wolfgang Betz 169:485bbcddf0c3 140 irq_.mode(PullDown); // betzw: set irq mode
Wolfgang Betz 130:770ce14d3d15 141 irq_.rise(&HCI_Isr);
Wolfgang Betz 130:770ce14d3d15 142
Wolfgang Betz 173:821942ac7d5a 143 // betzw - WORKAROUND: exploit current mbed 'InterruptIn' implementation
Wolfgang Betz 173:821942ac7d5a 144 // to handle spurious BlueNRG interrupts
Wolfgang Betz 173:821942ac7d5a 145 irq_.fall(&HCI_Isr); // attach IRQ handler & enable IRQ
Wolfgang Betz 173:821942ac7d5a 146 irq_.fall(NULL); // this doesn't clear the attachment but just disables the IRQ!
Wolfgang Betz 173:821942ac7d5a 147 // In this way spurious BlueNRG interrupts (e.g. IRQs happening
Wolfgang Betz 173:821942ac7d5a 148 // even without being enabled) end up in a real IRQ handler
Wolfgang Betz 173:821942ac7d5a 149 // function rather than in a NULL pointer (i.e. in a hard fault).
Wolfgang Betz 173:821942ac7d5a 150
Wolfgang Betz 130:770ce14d3d15 151 /* ToDo: Clear memory contents, reset the SD, etc. */
Wolfgang Betz 132:51056160fa4a 152 // By default, we set the device GAP role to PERIPHERAL
Wolfgang Betz 132:51056160fa4a 153 btle_init(BlueNRGGap::getInstance().getIsSetAddress(), GAP_PERIPHERAL_ROLE_IDB04A1);
Wolfgang Betz 130:770ce14d3d15 154
Wolfgang Betz 130:770ce14d3d15 155 isInitialized = true;
Andrea Palmieri 167:abc42e7158a6 156 BLE::InitializationCompleteCallbackContext context = {
Andrea Palmieri 167:abc42e7158a6 157 BLE::Instance(instanceID),
Andrea Palmieri 167:abc42e7158a6 158 BLE_ERROR_NONE
Andrea Palmieri 167:abc42e7158a6 159 };
Andrea Palmieri 167:abc42e7158a6 160 callback.call(&context);
Wolfgang Betz 130:770ce14d3d15 161
Wolfgang Betz 130:770ce14d3d15 162 return BLE_ERROR_NONE;
Wolfgang Betz 130:770ce14d3d15 163 }
Wolfgang Betz 130:770ce14d3d15 164
Wolfgang Betz 130:770ce14d3d15 165
Wolfgang Betz 130:770ce14d3d15 166 /**
Wolfgang Betz 130:770ce14d3d15 167 @brief Resets the BLE HW, removing any existing services and
Wolfgang Betz 130:770ce14d3d15 168 characteristics
Wolfgang Betz 130:770ce14d3d15 169 @param[in] void
Wolfgang Betz 130:770ce14d3d15 170 @returns ble_error_t
Wolfgang Betz 130:770ce14d3d15 171 */
Wolfgang Betz 130:770ce14d3d15 172 ble_error_t BlueNRGDevice::reset(void)
Wolfgang Betz 130:770ce14d3d15 173 {
Wolfgang Betz 130:770ce14d3d15 174 wait_us(500);
Wolfgang Betz 130:770ce14d3d15 175
Wolfgang Betz 130:770ce14d3d15 176 /* Reset BlueNRG SPI interface */
Wolfgang Betz 130:770ce14d3d15 177 rst_ = 0;
Wolfgang Betz 130:770ce14d3d15 178 wait_us(5);
Wolfgang Betz 130:770ce14d3d15 179 rst_ = 1;
Wolfgang Betz 130:770ce14d3d15 180 wait_us(5);
Wolfgang Betz 130:770ce14d3d15 181
Wolfgang Betz 130:770ce14d3d15 182 /* Wait for the radio to come back up */
Wolfgang Betz 130:770ce14d3d15 183 wait_us(500);
Wolfgang Betz 130:770ce14d3d15 184
Wolfgang Betz 130:770ce14d3d15 185 isInitialized = false;
Wolfgang Betz 130:770ce14d3d15 186
Wolfgang Betz 130:770ce14d3d15 187 return BLE_ERROR_NONE;
Wolfgang Betz 130:770ce14d3d15 188 }
Wolfgang Betz 130:770ce14d3d15 189
Wolfgang Betz 130:770ce14d3d15 190 /*!
Wolfgang Betz 130:770ce14d3d15 191 @brief Wait for any BLE Event like BLE Connection, Read Request etc.
Wolfgang Betz 130:770ce14d3d15 192 @param[in] void
Wolfgang Betz 130:770ce14d3d15 193 @returns char *
Wolfgang Betz 130:770ce14d3d15 194 */
Wolfgang Betz 130:770ce14d3d15 195 void BlueNRGDevice::waitForEvent(void)
Wolfgang Betz 130:770ce14d3d15 196 {
Wolfgang Betz 130:770ce14d3d15 197 bool must_return = false;
Wolfgang Betz 130:770ce14d3d15 198
Wolfgang Betz 130:770ce14d3d15 199 do {
Wolfgang Betz 130:770ce14d3d15 200 BlueNRGGap::getInstance().Process();
Wolfgang Betz 130:770ce14d3d15 201
Wolfgang Betz 130:770ce14d3d15 202 HCI_Process();
Wolfgang Betz 130:770ce14d3d15 203
Wolfgang Betz 130:770ce14d3d15 204 if(must_return) return;
Wolfgang Betz 130:770ce14d3d15 205
Wolfgang Betz 130:770ce14d3d15 206 __WFE(); /* it is recommended that SEVONPEND in the
Wolfgang Betz 130:770ce14d3d15 207 System Control Register is NOT set */
Wolfgang Betz 130:770ce14d3d15 208 must_return = true; /* after returning from WFE we must guarantee
Wolfgang Betz 130:770ce14d3d15 209 that conrol is given back to main loop before next WFE */
Wolfgang Betz 130:770ce14d3d15 210 } while(true);
Wolfgang Betz 130:770ce14d3d15 211
Wolfgang Betz 139:3a75965fd389 212 }
Wolfgang Betz 130:770ce14d3d15 213
Wolfgang Betz 130:770ce14d3d15 214 /*!
Wolfgang Betz 130:770ce14d3d15 215 @brief get GAP version
Wolfgang Betz 130:770ce14d3d15 216 @param[in] void
Wolfgang Betz 130:770ce14d3d15 217 @returns char *
Wolfgang Betz 130:770ce14d3d15 218 */
Wolfgang Betz 130:770ce14d3d15 219 const char *BlueNRGDevice::getVersion(void)
Wolfgang Betz 130:770ce14d3d15 220 {
Wolfgang Betz 130:770ce14d3d15 221 char *version = new char[6];
Wolfgang Betz 130:770ce14d3d15 222 memcpy((void *)version, "1.0.0", 5);
Wolfgang Betz 130:770ce14d3d15 223 return version;
Wolfgang Betz 130:770ce14d3d15 224 }
Wolfgang Betz 130:770ce14d3d15 225
Wolfgang Betz 130:770ce14d3d15 226 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 227 /*!
Wolfgang Betz 130:770ce14d3d15 228 @brief get reference to GAP object
Wolfgang Betz 130:770ce14d3d15 229 @param[in] void
Wolfgang Betz 130:770ce14d3d15 230 @returns Gap&
Wolfgang Betz 130:770ce14d3d15 231 */
Wolfgang Betz 130:770ce14d3d15 232 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 233 Gap &BlueNRGDevice::getGap()
Wolfgang Betz 130:770ce14d3d15 234 {
Wolfgang Betz 130:770ce14d3d15 235 return BlueNRGGap::getInstance();
Wolfgang Betz 130:770ce14d3d15 236 }
Wolfgang Betz 130:770ce14d3d15 237
Wolfgang Betz 130:770ce14d3d15 238 const Gap &BlueNRGDevice::getGap() const
Wolfgang Betz 130:770ce14d3d15 239 {
Wolfgang Betz 130:770ce14d3d15 240 return BlueNRGGap::getInstance();
Wolfgang Betz 130:770ce14d3d15 241 }
Wolfgang Betz 130:770ce14d3d15 242
Wolfgang Betz 130:770ce14d3d15 243 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 244 /*!
Wolfgang Betz 130:770ce14d3d15 245 @brief get reference to GATT server object
Wolfgang Betz 130:770ce14d3d15 246 @param[in] void
Wolfgang Betz 130:770ce14d3d15 247 @returns GattServer&
Wolfgang Betz 130:770ce14d3d15 248 */
Wolfgang Betz 130:770ce14d3d15 249 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 250 GattServer &BlueNRGDevice::getGattServer()
Wolfgang Betz 130:770ce14d3d15 251 {
Wolfgang Betz 130:770ce14d3d15 252 return BlueNRGGattServer::getInstance();
Wolfgang Betz 130:770ce14d3d15 253 }
Wolfgang Betz 130:770ce14d3d15 254
Wolfgang Betz 130:770ce14d3d15 255 const GattServer &BlueNRGDevice::getGattServer() const
Wolfgang Betz 130:770ce14d3d15 256 {
Wolfgang Betz 130:770ce14d3d15 257 return BlueNRGGattServer::getInstance();
Wolfgang Betz 130:770ce14d3d15 258 }
Wolfgang Betz 130:770ce14d3d15 259
Wolfgang Betz 130:770ce14d3d15 260 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 261 /*!
Wolfgang Betz 130:770ce14d3d15 262 @brief shut down the the BLE device
Wolfgang Betz 130:770ce14d3d15 263 @param[out] error if any
Wolfgang Betz 130:770ce14d3d15 264 */
Wolfgang Betz 130:770ce14d3d15 265 /**************************************************************************/
Wolfgang Betz 130:770ce14d3d15 266 ble_error_t BlueNRGDevice::shutdown(void) {
Wolfgang Betz 130:770ce14d3d15 267 return reset();
Wolfgang Betz 130:770ce14d3d15 268 }
Wolfgang Betz 130:770ce14d3d15 269
Wolfgang Betz 130:770ce14d3d15 270 /**
Wolfgang Betz 130:770ce14d3d15 271 * @brief Reads from BlueNRG SPI buffer and store data into local buffer.
Wolfgang Betz 130:770ce14d3d15 272 * @param buffer : Buffer where data from SPI are stored
Wolfgang Betz 130:770ce14d3d15 273 * @param buff_size: Buffer size
Wolfgang Betz 130:770ce14d3d15 274 * @retval int32_t : Number of read bytes
Wolfgang Betz 130:770ce14d3d15 275 */
Wolfgang Betz 130:770ce14d3d15 276 int32_t BlueNRGDevice::spiRead(uint8_t *buffer, uint8_t buff_size)
Wolfgang Betz 130:770ce14d3d15 277 {
Wolfgang Betz 130:770ce14d3d15 278 uint16_t byte_count;
Wolfgang Betz 130:770ce14d3d15 279 uint8_t len = 0;
Wolfgang Betz 130:770ce14d3d15 280 uint8_t char_ff = 0xff;
Wolfgang Betz 130:770ce14d3d15 281 volatile uint8_t read_char;
Wolfgang Betz 130:770ce14d3d15 282
Wolfgang Betz 130:770ce14d3d15 283 uint8_t i = 0;
Wolfgang Betz 130:770ce14d3d15 284 volatile uint8_t tmpreg;
Wolfgang Betz 130:770ce14d3d15 285
Wolfgang Betz 130:770ce14d3d15 286 uint8_t header_master[HEADER_SIZE] = {0x0b, 0x00, 0x00, 0x00, 0x00};
Wolfgang Betz 130:770ce14d3d15 287 uint8_t header_slave[HEADER_SIZE];
Wolfgang Betz 130:770ce14d3d15 288
Wolfgang Betz 130:770ce14d3d15 289 /* Select the chip */
Wolfgang Betz 130:770ce14d3d15 290 nCS_ = 0;
Wolfgang Betz 130:770ce14d3d15 291
Wolfgang Betz 130:770ce14d3d15 292 /* Read the header */
Wolfgang Betz 130:770ce14d3d15 293 for (i = 0; i < 5; i++)
Wolfgang Betz 130:770ce14d3d15 294 {
Wolfgang Betz 130:770ce14d3d15 295 tmpreg = spi_.write(header_master[i]);
Wolfgang Betz 130:770ce14d3d15 296 header_slave[i] = (uint8_t)(tmpreg);
Wolfgang Betz 130:770ce14d3d15 297 }
Wolfgang Betz 130:770ce14d3d15 298
Wolfgang Betz 130:770ce14d3d15 299 if (header_slave[0] == 0x02) {
Wolfgang Betz 130:770ce14d3d15 300 /* device is ready */
Wolfgang Betz 130:770ce14d3d15 301 byte_count = (header_slave[4]<<8)|header_slave[3];
Wolfgang Betz 130:770ce14d3d15 302
Wolfgang Betz 130:770ce14d3d15 303 if (byte_count > 0) {
Wolfgang Betz 130:770ce14d3d15 304
Wolfgang Betz 130:770ce14d3d15 305 /* avoid to read more data that size of the buffer */
Wolfgang Betz 130:770ce14d3d15 306 if (byte_count > buff_size){
Wolfgang Betz 130:770ce14d3d15 307 byte_count = buff_size;
Wolfgang Betz 130:770ce14d3d15 308 }
Wolfgang Betz 130:770ce14d3d15 309
Wolfgang Betz 130:770ce14d3d15 310 for (len = 0; len < byte_count; len++){
Wolfgang Betz 130:770ce14d3d15 311 read_char = spi_.write(char_ff);
Wolfgang Betz 130:770ce14d3d15 312 buffer[len] = read_char;
Wolfgang Betz 130:770ce14d3d15 313 }
Wolfgang Betz 130:770ce14d3d15 314 }
Wolfgang Betz 130:770ce14d3d15 315 }
Wolfgang Betz 130:770ce14d3d15 316 /* Release CS line to deselect the chip */
Wolfgang Betz 130:770ce14d3d15 317 nCS_ = 1;
Wolfgang Betz 130:770ce14d3d15 318
Wolfgang Betz 130:770ce14d3d15 319 // Add a small delay to give time to the BlueNRG to set the IRQ pin low
Wolfgang Betz 130:770ce14d3d15 320 // to avoid a useless SPI read at the end of the transaction
Wolfgang Betz 130:770ce14d3d15 321 for(volatile int i = 0; i < 2; i++)__NOP();
Wolfgang Betz 130:770ce14d3d15 322
Wolfgang Betz 130:770ce14d3d15 323 #ifdef PRINT_CSV_FORMAT
Wolfgang Betz 130:770ce14d3d15 324 if (len > 0) {
Wolfgang Betz 130:770ce14d3d15 325 print_csv_time();
Wolfgang Betz 130:770ce14d3d15 326 for (int i=0; i<len; i++) {
Wolfgang Betz 130:770ce14d3d15 327 PRINT_CSV(" %02x", buffer[i]);
Wolfgang Betz 130:770ce14d3d15 328 }
Wolfgang Betz 130:770ce14d3d15 329 PRINT_CSV("\n");
Wolfgang Betz 130:770ce14d3d15 330 }
Wolfgang Betz 130:770ce14d3d15 331 #endif
Wolfgang Betz 130:770ce14d3d15 332
Wolfgang Betz 130:770ce14d3d15 333 return len;
Wolfgang Betz 130:770ce14d3d15 334 }
Wolfgang Betz 130:770ce14d3d15 335
Wolfgang Betz 130:770ce14d3d15 336 /**
Wolfgang Betz 130:770ce14d3d15 337 * @brief Writes data from local buffer to SPI.
Wolfgang Betz 130:770ce14d3d15 338 * @param data1 : First data buffer to be written
Wolfgang Betz 130:770ce14d3d15 339 * @param data2 : Second data buffer to be written
Wolfgang Betz 130:770ce14d3d15 340 * @param Nb_bytes1: Size of first data buffer to be written
Wolfgang Betz 130:770ce14d3d15 341 * @param Nb_bytes2: Size of second data buffer to be written
Wolfgang Betz 130:770ce14d3d15 342 * @retval Number of read bytes
Wolfgang Betz 130:770ce14d3d15 343 */
Wolfgang Betz 130:770ce14d3d15 344 int32_t BlueNRGDevice::spiWrite(uint8_t* data1,
Wolfgang Betz 130:770ce14d3d15 345 uint8_t* data2, uint8_t Nb_bytes1, uint8_t Nb_bytes2)
Wolfgang Betz 130:770ce14d3d15 346 {
Wolfgang Betz 130:770ce14d3d15 347 int32_t result = 0;
Wolfgang Betz 130:770ce14d3d15 348 uint32_t i;
Wolfgang Betz 130:770ce14d3d15 349 volatile uint8_t tmpreg;
Wolfgang Betz 130:770ce14d3d15 350
Wolfgang Betz 130:770ce14d3d15 351 unsigned char header_master[HEADER_SIZE] = {0x0a, 0x00, 0x00, 0x00, 0x00};
Wolfgang Betz 130:770ce14d3d15 352 unsigned char header_slave[HEADER_SIZE] = {0xaa, 0x00, 0x00, 0x00, 0x00};
Wolfgang Betz 130:770ce14d3d15 353
Wolfgang Betz 130:770ce14d3d15 354 disable_irq();
Wolfgang Betz 130:770ce14d3d15 355
Wolfgang Betz 130:770ce14d3d15 356 /* CS reset */
Wolfgang Betz 130:770ce14d3d15 357 nCS_ = 0;
Wolfgang Betz 130:770ce14d3d15 358
Wolfgang Betz 130:770ce14d3d15 359 /* Exchange header */
Wolfgang Betz 130:770ce14d3d15 360 for (i = 0; i < 5; i++)
Wolfgang Betz 130:770ce14d3d15 361 {
Wolfgang Betz 130:770ce14d3d15 362 tmpreg = spi_.write(header_master[i]);
Wolfgang Betz 130:770ce14d3d15 363 header_slave[i] = tmpreg;
Wolfgang Betz 130:770ce14d3d15 364 }
Wolfgang Betz 130:770ce14d3d15 365
Wolfgang Betz 130:770ce14d3d15 366 if (header_slave[0] == 0x02) {
Wolfgang Betz 130:770ce14d3d15 367 /* SPI is ready */
Wolfgang Betz 130:770ce14d3d15 368 if (header_slave[1] >= (Nb_bytes1+Nb_bytes2)) {
Wolfgang Betz 130:770ce14d3d15 369
Wolfgang Betz 130:770ce14d3d15 370 /* Buffer is big enough */
Wolfgang Betz 130:770ce14d3d15 371 for (i = 0; i < Nb_bytes1; i++) {
Wolfgang Betz 130:770ce14d3d15 372 spi_.write(*(data1 + i));
Wolfgang Betz 130:770ce14d3d15 373 }
Wolfgang Betz 130:770ce14d3d15 374 for (i = 0; i < Nb_bytes2; i++) {
Wolfgang Betz 130:770ce14d3d15 375 spi_.write(*(data2 + i));
Wolfgang Betz 130:770ce14d3d15 376 }
Wolfgang Betz 130:770ce14d3d15 377 } else {
Wolfgang Betz 130:770ce14d3d15 378 /* Buffer is too small */
Wolfgang Betz 130:770ce14d3d15 379 result = -2;
Wolfgang Betz 130:770ce14d3d15 380 }
Wolfgang Betz 130:770ce14d3d15 381 } else {
Wolfgang Betz 130:770ce14d3d15 382 /* SPI is not ready */
Wolfgang Betz 130:770ce14d3d15 383 result = -1;
Wolfgang Betz 130:770ce14d3d15 384 }
Wolfgang Betz 130:770ce14d3d15 385
Wolfgang Betz 130:770ce14d3d15 386 /* Release CS line */
Wolfgang Betz 130:770ce14d3d15 387 //HAL_GPIO_WritePin(BNRG_SPI_CS_PORT, BNRG_SPI_CS_PIN, GPIO_PIN_SET);
Wolfgang Betz 130:770ce14d3d15 388 nCS_ = 1;
Wolfgang Betz 130:770ce14d3d15 389
Wolfgang Betz 130:770ce14d3d15 390 enable_irq();
Wolfgang Betz 130:770ce14d3d15 391
Wolfgang Betz 130:770ce14d3d15 392 return result;
Wolfgang Betz 130:770ce14d3d15 393 }
Wolfgang Betz 130:770ce14d3d15 394
Wolfgang Betz 130:770ce14d3d15 395 bool BlueNRGDevice::dataPresent()
Wolfgang Betz 130:770ce14d3d15 396 {
Wolfgang Betz 130:770ce14d3d15 397 return (irq_ == 1);
Wolfgang Betz 130:770ce14d3d15 398 }
Wolfgang Betz 130:770ce14d3d15 399
Wolfgang Betz 130:770ce14d3d15 400 void BlueNRGDevice::disable_irq()
Wolfgang Betz 130:770ce14d3d15 401 {
Wolfgang Betz 130:770ce14d3d15 402 irq_.disable_irq();
Wolfgang Betz 130:770ce14d3d15 403 }
Wolfgang Betz 130:770ce14d3d15 404
Wolfgang Betz 130:770ce14d3d15 405 void BlueNRGDevice::enable_irq()
Wolfgang Betz 130:770ce14d3d15 406 {
Wolfgang Betz 130:770ce14d3d15 407 irq_.enable_irq();
Wolfgang Betz 130:770ce14d3d15 408 }