Martin Kojtal / cc3000_hostdriver_mbedsocket Featured

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Dependents:   cc3000_hello_world_demo cc3000_simple_socket_demo cc3000_ntp_demo cc3000_ping_demo ... more

cc3000_spi.cpp@18:7e22775eadb9, 2013-10-02 (annotated)

Committer:
SolderSplashLabs
Date:
Wed Oct 02 21:57:28 2013 +0000
Revision:
18:7e22775eadb9
Parent:
0:615c697c33b0
Child:
20:30b6ed7bf8fd
Websocket demo showed that if gethostbyname failed and returned 0.0.0.0 it still went ahead. Added checking to the gethostbyname call in Endpoint.cpp

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Kojto 0:615c697c33b0 1 /*****************************************************************************
Kojto 0:615c697c33b0 2 *
Kojto 0:615c697c33b0 3 * C++ interface/implementation created by Martin Kojtal (0xc0170). Thanks to
Kojto 0:615c697c33b0 4 * Jim Carver and Frank Vannieuwkerke for their inital cc3000 mbed port and
Kojto 0:615c697c33b0 5 * provided help.
Kojto 0:615c697c33b0 6 *
Kojto 0:615c697c33b0 7 * This version of "host driver" uses CC3000 Host Driver Implementation. Thus
Kojto 0:615c697c33b0 8 * read the following copyright:
Kojto 0:615c697c33b0 9 *
Kojto 0:615c697c33b0 10 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
Kojto 0:615c697c33b0 11 *
Kojto 0:615c697c33b0 12 * Redistribution and use in source and binary forms, with or without
Kojto 0:615c697c33b0 13 * modification, are permitted provided that the following conditions
Kojto 0:615c697c33b0 14 * are met:
Kojto 0:615c697c33b0 15 *
Kojto 0:615c697c33b0 16 * Redistributions of source code must retain the above copyright
Kojto 0:615c697c33b0 17 * notice, this list of conditions and the following disclaimer.
Kojto 0:615c697c33b0 18 *
Kojto 0:615c697c33b0 19 * Redistributions in binary form must reproduce the above copyright
Kojto 0:615c697c33b0 20 * notice, this list of conditions and the following disclaimer in the
Kojto 0:615c697c33b0 21 * documentation and/or other materials provided with the
Kojto 0:615c697c33b0 22 * distribution.
Kojto 0:615c697c33b0 23 *
Kojto 0:615c697c33b0 24 * Neither the name of Texas Instruments Incorporated nor the names of
Kojto 0:615c697c33b0 25 * its contributors may be used to endorse or promote products derived
Kojto 0:615c697c33b0 26 * from this software without specific prior written permission.
Kojto 0:615c697c33b0 27 *
Kojto 0:615c697c33b0 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Kojto 0:615c697c33b0 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Kojto 0:615c697c33b0 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Kojto 0:615c697c33b0 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
Kojto 0:615c697c33b0 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
Kojto 0:615c697c33b0 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
Kojto 0:615c697c33b0 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
Kojto 0:615c697c33b0 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Kojto 0:615c697c33b0 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Kojto 0:615c697c33b0 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Kojto 0:615c697c33b0 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Kojto 0:615c697c33b0 39 *
Kojto 0:615c697c33b0 40 *****************************************************************************/
Kojto 0:615c697c33b0 41 #include "cc3000.h"
Kojto 0:615c697c33b0 42 #include "cc3000_spi.h"
Kojto 0:615c697c33b0 43
Kojto 0:615c697c33b0 44 namespace mbed_cc3000 {
Kojto 0:615c697c33b0 45
Kojto 0:615c697c33b0 46 cc3000_spi::cc3000_spi(PinName cc3000_irq, PinName cc3000_en, PinName cc3000_cs, SPI cc3000_spi, IRQn_Type irq_port, cc3000_event &event, cc3000_simple_link &simple_link)
Kojto 0:615c697c33b0 47 : _wlan_irq(cc3000_irq), _wlan_en(cc3000_en), _wlan_cs(cc3000_cs), _wlan_spi(cc3000_spi), _irq_port(irq_port),
Kojto 0:615c697c33b0 48 _event(event), _simple_link(simple_link) {
Kojto 0:615c697c33b0 49 /* TODO = clear pending interrupts for PORTS. This is dependent on the used chip */
Kojto 0:615c697c33b0 50
Kojto 0:615c697c33b0 51 _wlan_spi.format(8,1);
Kojto 0:615c697c33b0 52 _wlan_spi.frequency(12000000);
Kojto 0:615c697c33b0 53 _function_pointer = _wlan_irq.fall(this, &cc3000_spi::WLAN_IRQHandler);
Kojto 0:615c697c33b0 54
Kojto 0:615c697c33b0 55 _wlan_en = 0;
Kojto 0:615c697c33b0 56 _wlan_cs = 1;
Kojto 0:615c697c33b0 57 }
Kojto 0:615c697c33b0 58
Kojto 0:615c697c33b0 59 cc3000_spi::~cc3000_spi() {
Kojto 0:615c697c33b0 60
Kojto 0:615c697c33b0 61 }
Kojto 0:615c697c33b0 62
Kojto 0:615c697c33b0 63 void cc3000_spi::wlan_irq_enable()
Kojto 0:615c697c33b0 64 {
Kojto 0:615c697c33b0 65 NVIC_EnableIRQ(_irq_port);
Kojto 0:615c697c33b0 66 }
Kojto 0:615c697c33b0 67
Kojto 0:615c697c33b0 68 void cc3000_spi::wlan_irq_disable() {
Kojto 0:615c697c33b0 69 NVIC_DisableIRQ(_irq_port);
Kojto 0:615c697c33b0 70 }
Kojto 0:615c697c33b0 71
Kojto 0:615c697c33b0 72 void cc3000_spi::wlan_irq_set(uint8_t value) {
Kojto 0:615c697c33b0 73 if (value)
Kojto 0:615c697c33b0 74 {
Kojto 0:615c697c33b0 75 _wlan_en = 1;
Kojto 0:615c697c33b0 76 }
Kojto 0:615c697c33b0 77 else
Kojto 0:615c697c33b0 78 {
Kojto 0:615c697c33b0 79 _wlan_en = 0;
Kojto 0:615c697c33b0 80 }
Kojto 0:615c697c33b0 81 }
Kojto 0:615c697c33b0 82
Kojto 0:615c697c33b0 83 uint32_t cc3000_spi::wlan_irq_read() {
Kojto 0:615c697c33b0 84 return _wlan_irq.read();
Kojto 0:615c697c33b0 85 }
Kojto 0:615c697c33b0 86
Kojto 0:615c697c33b0 87 void cc3000_spi::close() {
Kojto 0:615c697c33b0 88 if (_simple_link.get_received_buffer() != 0)
Kojto 0:615c697c33b0 89 {
Kojto 0:615c697c33b0 90 _simple_link.set_received_buffer(0);
Kojto 0:615c697c33b0 91 }
Kojto 0:615c697c33b0 92 wlan_irq_disable();
Kojto 0:615c697c33b0 93 }
Kojto 0:615c697c33b0 94
Kojto 0:615c697c33b0 95 // void cc3000_spi::SpiReceiveHandler() {
Kojto 0:615c697c33b0 96 // _simple_link.usEventOrDataReceived = 1;
Kojto 0:615c697c33b0 97 // //_simple_link.pucReceivedData = (unsigned char *)pvBuffer;
Kojto 0:615c697c33b0 98
Kojto 0:615c697c33b0 99 // hci_unsolicited_event_handler();
Kojto 0:615c697c33b0 100 // }
Kojto 0:615c697c33b0 101
Kojto 0:615c697c33b0 102
Kojto 0:615c697c33b0 103 /* TODO
Kojto 0:615c697c33b0 104 pRxPacket, pTxPacket do we need to hold this pointer ?
Kojto 0:615c697c33b0 105 SPIRxHandler - remove?
Kojto 0:615c697c33b0 106 */
Kojto 0:615c697c33b0 107 void cc3000_spi::open() {
Kojto 0:615c697c33b0 108 _spi_info.spi_state = eSPI_STATE_POWERUP;
Kojto 0:615c697c33b0 109 //_spi_info.SPIRxHandler = pfRxHandler;
Kojto 0:615c697c33b0 110 _spi_info.tx_packet_length = 0;
Kojto 0:615c697c33b0 111 _spi_info.rx_packet_length = 0;
Kojto 0:615c697c33b0 112 //_rx_buffer[CC3000_RX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER;
Kojto 0:615c697c33b0 113 //_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER;
Kojto 0:615c697c33b0 114 wlan_irq_enable();
Kojto 0:615c697c33b0 115 }
Kojto 0:615c697c33b0 116
Kojto 0:615c697c33b0 117 uint32_t cc3000_spi::first_write(uint8_t *buffer, uint16_t length) {
Kojto 0:615c697c33b0 118 _wlan_cs = 0;
Kojto 0:615c697c33b0 119 wait_us(50);
Kojto 0:615c697c33b0 120
Kojto 0:615c697c33b0 121 /* first 4 bytes of the data */
Kojto 0:615c697c33b0 122 write_synchronous(buffer, 4);
Kojto 0:615c697c33b0 123 wait_us(50);
Kojto 0:615c697c33b0 124 write_synchronous(buffer + 4, length - 4);
Kojto 0:615c697c33b0 125 _spi_info.spi_state = eSPI_STATE_IDLE;
Kojto 0:615c697c33b0 126 _wlan_cs = 1;
Kojto 0:615c697c33b0 127
Kojto 0:615c697c33b0 128 return 0;
Kojto 0:615c697c33b0 129 }
Kojto 0:615c697c33b0 130
Kojto 0:615c697c33b0 131
Kojto 0:615c697c33b0 132 uint32_t cc3000_spi::write(uint8_t *buffer, uint16_t length) {
Kojto 0:615c697c33b0 133 uint8_t pad = 0;
Kojto 0:615c697c33b0 134 // check the total length of the packet in order to figure out if padding is necessary
Kojto 0:615c697c33b0 135 if(!(length & 0x0001))
Kojto 0:615c697c33b0 136 {
Kojto 0:615c697c33b0 137 pad++;
Kojto 0:615c697c33b0 138 }
Kojto 0:615c697c33b0 139 buffer[0] = WRITE;
Kojto 0:615c697c33b0 140 buffer[1] = HI(length + pad);
Kojto 0:615c697c33b0 141 buffer[2] = LO(length + pad);
Kojto 0:615c697c33b0 142 buffer[3] = 0;
Kojto 0:615c697c33b0 143 buffer[4] = 0;
Kojto 0:615c697c33b0 144
Kojto 0:615c697c33b0 145 length += (SPI_HEADER_SIZE + pad);
Kojto 0:615c697c33b0 146
Kojto 0:615c697c33b0 147 // The magic number resides at the end of the TX/RX buffer (1 byte after the allocated size)
Kojto 0:615c697c33b0 148 // If the magic number is overwitten - buffer overrun occurred - we will be stuck here forever!
Kojto 0:615c697c33b0 149 uint8_t * transmit_buffer = _simple_link.get_transmit_buffer();
Kojto 0:615c697c33b0 150 if (transmit_buffer[CC3000_TX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER)
Kojto 0:615c697c33b0 151 {
Kojto 0:615c697c33b0 152 while (1);
Kojto 0:615c697c33b0 153 }
Kojto 0:615c697c33b0 154
Kojto 0:615c697c33b0 155 if (_spi_info.spi_state == eSPI_STATE_POWERUP)
Kojto 0:615c697c33b0 156 {
Kojto 0:615c697c33b0 157 while (_spi_info.spi_state != eSPI_STATE_INITIALIZED);
Kojto 0:615c697c33b0 158 }
Kojto 0:615c697c33b0 159
Kojto 0:615c697c33b0 160 if (_spi_info.spi_state == eSPI_STATE_INITIALIZED)
Kojto 0:615c697c33b0 161 {
Kojto 0:615c697c33b0 162 // TX/RX transaction over SPI after powerup: IRQ is low - send read buffer size command
Kojto 0:615c697c33b0 163 first_write(buffer, length);
Kojto 0:615c697c33b0 164 }
Kojto 0:615c697c33b0 165 else
Kojto 0:615c697c33b0 166 {
Kojto 0:615c697c33b0 167 // Prevent occurence of a race condition when 2 back to back packets are sent to the
Kojto 0:615c697c33b0 168 // device, so the state will move to IDLE and once again to not IDLE due to IRQ
Kojto 0:615c697c33b0 169 wlan_irq_disable();
Kojto 0:615c697c33b0 170
Kojto 0:615c697c33b0 171 while (_spi_info.spi_state != eSPI_STATE_IDLE);
Kojto 0:615c697c33b0 172
Kojto 0:615c697c33b0 173 _spi_info.spi_state = eSPI_STATE_WRITE_IRQ;
Kojto 0:615c697c33b0 174 //_spi_info.pTxPacket = buffer;
Kojto 0:615c697c33b0 175 _spi_info.tx_packet_length = length;
Kojto 0:615c697c33b0 176
Kojto 0:615c697c33b0 177 // Assert the CS line and wait until the IRQ line is active, then initialize the write operation
Kojto 0:615c697c33b0 178 _wlan_cs = 0;
Kojto 0:615c697c33b0 179
Kojto 0:615c697c33b0 180 wlan_irq_enable();
Kojto 0:615c697c33b0 181 }
Kojto 0:615c697c33b0 182
Kojto 0:615c697c33b0 183 // Wait until the transaction ends
Kojto 0:615c697c33b0 184 while (_spi_info.spi_state != eSPI_STATE_IDLE);
Kojto 0:615c697c33b0 185
Kojto 0:615c697c33b0 186 return 0;
Kojto 0:615c697c33b0 187 }
Kojto 0:615c697c33b0 188
Kojto 0:615c697c33b0 189 void cc3000_spi::write_synchronous(uint8_t *data, uint16_t size) {
Kojto 0:615c697c33b0 190 while(size)
Kojto 0:615c697c33b0 191 {
Kojto 0:615c697c33b0 192 _wlan_spi.write(*data++);
Kojto 0:615c697c33b0 193 size--;
Kojto 0:615c697c33b0 194 }
Kojto 0:615c697c33b0 195 }
Kojto 0:615c697c33b0 196
Kojto 0:615c697c33b0 197 void cc3000_spi::read_synchronous(uint8_t *data, uint16_t size) {
Kojto 0:615c697c33b0 198 for (uint32_t i = 0; i < size; i++)
Kojto 0:615c697c33b0 199 {
Kojto 0:615c697c33b0 200 data[i] = _wlan_spi.write(0x03);;
Kojto 0:615c697c33b0 201 }
Kojto 0:615c697c33b0 202 }
Kojto 0:615c697c33b0 203
Kojto 0:615c697c33b0 204 uint32_t cc3000_spi::read_data_cont() {
Kojto 0:615c697c33b0 205 long data_to_recv;
Kojto 0:615c697c33b0 206 unsigned char *evnt_buff, type;
Kojto 0:615c697c33b0 207
Kojto 0:615c697c33b0 208 //determine the packet type
Kojto 0:615c697c33b0 209 evnt_buff = _simple_link.get_received_buffer();
Kojto 0:615c697c33b0 210 data_to_recv = 0;
Kojto 0:615c697c33b0 211 STREAM_TO_UINT8((uint8_t *)(evnt_buff + SPI_HEADER_SIZE), HCI_PACKET_TYPE_OFFSET, type);
Kojto 0:615c697c33b0 212
Kojto 0:615c697c33b0 213 switch(type)
Kojto 0:615c697c33b0 214 {
Kojto 0:615c697c33b0 215 case HCI_TYPE_DATA:
Kojto 0:615c697c33b0 216 {
Kojto 0:615c697c33b0 217 // Read the remaining data..
Kojto 0:615c697c33b0 218 STREAM_TO_UINT16((uint8_t *)(evnt_buff + SPI_HEADER_SIZE), HCI_DATA_LENGTH_OFFSET, data_to_recv);
Kojto 0:615c697c33b0 219 if (!((HEADERS_SIZE_EVNT + data_to_recv) & 1))
Kojto 0:615c697c33b0 220 {
Kojto 0:615c697c33b0 221 data_to_recv++;
Kojto 0:615c697c33b0 222 }
Kojto 0:615c697c33b0 223
Kojto 0:615c697c33b0 224 if (data_to_recv)
Kojto 0:615c697c33b0 225 {
Kojto 0:615c697c33b0 226 read_synchronous(evnt_buff + 10, data_to_recv);
Kojto 0:615c697c33b0 227 }
Kojto 0:615c697c33b0 228 break;
Kojto 0:615c697c33b0 229 }
Kojto 0:615c697c33b0 230 case HCI_TYPE_EVNT:
Kojto 0:615c697c33b0 231 {
Kojto 0:615c697c33b0 232 // Calculate the rest length of the data
Kojto 0:615c697c33b0 233 STREAM_TO_UINT8((char *)(evnt_buff + SPI_HEADER_SIZE), HCI_EVENT_LENGTH_OFFSET, data_to_recv);
Kojto 0:615c697c33b0 234 data_to_recv -= 1;
Kojto 0:615c697c33b0 235 // Add padding byte if needed
Kojto 0:615c697c33b0 236 if ((HEADERS_SIZE_EVNT + data_to_recv) & 1)
Kojto 0:615c697c33b0 237 {
Kojto 0:615c697c33b0 238 data_to_recv++;
Kojto 0:615c697c33b0 239 }
Kojto 0:615c697c33b0 240
Kojto 0:615c697c33b0 241 if (data_to_recv)
Kojto 0:615c697c33b0 242 {
Kojto 0:615c697c33b0 243 read_synchronous(evnt_buff + 10, data_to_recv);
Kojto 0:615c697c33b0 244 }
Kojto 0:615c697c33b0 245
Kojto 0:615c697c33b0 246 _spi_info.spi_state = eSPI_STATE_READ_EOT;
Kojto 0:615c697c33b0 247 break;
Kojto 0:615c697c33b0 248 }
Kojto 0:615c697c33b0 249 }
Kojto 0:615c697c33b0 250 return (0);
Kojto 0:615c697c33b0 251 }
Kojto 0:615c697c33b0 252
Kojto 0:615c697c33b0 253 void cc3000_spi::write_wlan_en(uint8_t value) {
Kojto 0:615c697c33b0 254 if (value) {
Kojto 0:615c697c33b0 255 _wlan_en = 1;
Kojto 0:615c697c33b0 256 } else {
Kojto 0:615c697c33b0 257 _wlan_en = 0;
Kojto 0:615c697c33b0 258 }
Kojto 0:615c697c33b0 259 }
Kojto 0:615c697c33b0 260
Kojto 0:615c697c33b0 261 void cc3000_spi::WLAN_IRQHandler() {
Kojto 0:615c697c33b0 262 if (_spi_info.spi_state == eSPI_STATE_POWERUP)
Kojto 0:615c697c33b0 263 {
Kojto 0:615c697c33b0 264 // Inform HCI Layer that IRQ occured after powerup
Kojto 0:615c697c33b0 265 _spi_info.spi_state = eSPI_STATE_INITIALIZED;
Kojto 0:615c697c33b0 266 }
Kojto 0:615c697c33b0 267 else if (_spi_info.spi_state == eSPI_STATE_IDLE)
Kojto 0:615c697c33b0 268 {
Kojto 0:615c697c33b0 269 _spi_info.spi_state = eSPI_STATE_READ_IRQ;
Kojto 0:615c697c33b0 270 /* IRQ line goes low - acknowledge it */
Kojto 0:615c697c33b0 271 _wlan_cs = 0;
Kojto 0:615c697c33b0 272 read_synchronous(_simple_link.get_received_buffer(), 10);
Kojto 0:615c697c33b0 273 _spi_info.spi_state = eSPI_STATE_READ_EOT;
Kojto 0:615c697c33b0 274
Kojto 0:615c697c33b0 275
Kojto 0:615c697c33b0 276 // The header was read - continue with the payload read
Kojto 0:615c697c33b0 277 if (!read_data_cont())
Kojto 0:615c697c33b0 278 {
Kojto 0:615c697c33b0 279 // All the data was read - finalize handling by switching to the task
Kojto 0:615c697c33b0 280 // Trigger Rx processing
Kojto 0:615c697c33b0 281 wlan_irq_disable();
Kojto 0:615c697c33b0 282 _wlan_cs = 1;
Kojto 0:615c697c33b0 283 // The magic number resides at the end of the TX/RX buffer (1 byte after the allocated size)
Kojto 0:615c697c33b0 284 // If the magic number is overwitten - buffer overrun occurred - we will be stuck here forever!
Kojto 0:615c697c33b0 285 uint8_t *received_buffer = _simple_link.get_received_buffer();
Kojto 0:615c697c33b0 286 if (received_buffer[CC3000_RX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER)
Kojto 0:615c697c33b0 287 {
Kojto 0:615c697c33b0 288 while (1);
Kojto 0:615c697c33b0 289 }
Kojto 0:615c697c33b0 290 _spi_info.spi_state = eSPI_STATE_IDLE;
Kojto 0:615c697c33b0 291 _event.received_handler(received_buffer + SPI_HEADER_SIZE);
Kojto 0:615c697c33b0 292 }
Kojto 0:615c697c33b0 293 }
Kojto 0:615c697c33b0 294 else if (_spi_info.spi_state == eSPI_STATE_WRITE_IRQ)
Kojto 0:615c697c33b0 295 {
Kojto 0:615c697c33b0 296 write_synchronous(_simple_link.get_transmit_buffer(), _spi_info.tx_packet_length);
Kojto 0:615c697c33b0 297 _spi_info.spi_state = eSPI_STATE_IDLE;
Kojto 0:615c697c33b0 298 _wlan_cs = 1;
Kojto 0:615c697c33b0 299 }
Kojto 0:615c697c33b0 300 }
Kojto 0:615c697c33b0 301
Kojto 0:615c697c33b0 302 }