ST / stm-spirit1-rf-driver

Prototype RF driver for STM Sub-1 GHz RF expansion board based on the SPSGRF-868 module for STM32 Nucleo.

Prototype RF Driver for STM Sub-1 GHz RF Expansion Boards based on the SPSGRF-868 and SPSGRF-915 Modules for STM32 Nucleo

Currently supported boards:

Note, in order to use expansion board X-NUCLEO-IDS01A4 in mbed you need to perform the following HW modifications on the board:

  • Unmount resistor R4
  • Mount resistor R7

Furthermore, on some Nucleo development boards (e.g. the NUCLEO_F429ZI), in order to be able to use Ethernet together with these Sub-1 GHz RF expansion boards, you need to compile this driver with macro SPIRIT1_SPI_MOSI=PB_5 defined, while the development board typically requires some HW modification as e.g. described here!

This driver can be used together with the 6LoWPAN stack (a.k.a. Nanostack).

source/SimpleSpirit1.cpp@40:343254875d89, 2016-11-29 (annotated)

Committer:
Wolfgang Betz
Date:
Tue Nov 29 17:25:20 2016 +0100
Revision:
40:343254875d89
Parent:
39:75481c4c6655
Child:
42:92a60a905ee7
Handle RX errors immediately & use channel 1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Wolfgang Betz 34:edda6a7238ec 1 /*** Mbed Includes ***/
Wolfgang Betz 34:edda6a7238ec 2 #include "SimpleSpirit1.h"
Wolfgang Betz 34:edda6a7238ec 3 #include "radio_spi.h"
Wolfgang Betz 34:edda6a7238ec 4
Wolfgang Betz 34:edda6a7238ec 5 #define SPIRIT_GPIO_IRQ (SPIRIT_GPIO_3)
Wolfgang Betz 34:edda6a7238ec 6
Wolfgang Betz 34:edda6a7238ec 7 static uint16_t last_state;
Wolfgang Betz 34:edda6a7238ec 8 #define SPIRIT1_STATUS() ((last_state = (uint16_t)refresh_state()) & SPIRIT1_STATE_STATEBITS)
Wolfgang Betz 34:edda6a7238ec 9
Wolfgang Betz 34:edda6a7238ec 10 #define XO_ON (0x1)
Wolfgang Betz 34:edda6a7238ec 11
Wolfgang Betz 34:edda6a7238ec 12 #define BUSYWAIT_UNTIL(cond, millisecs) \
Wolfgang Betz 34:edda6a7238ec 13 do { \
Wolfgang Betz 34:edda6a7238ec 14 uint32_t start = us_ticker_read(); \
Wolfgang Betz 34:edda6a7238ec 15 while (!(cond) && ((us_ticker_read() - start) < ((uint32_t)millisecs)*1000U)); \
Wolfgang Betz 34:edda6a7238ec 16 } while(0)
Wolfgang Betz 34:edda6a7238ec 17
Wolfgang Betz 34:edda6a7238ec 18 #define st_lib_spirit_irqs SpiritIrqs
Wolfgang Betz 34:edda6a7238ec 19
Wolfgang Betz 37:bc043030b55a 20 #define STATE_TIMEOUT (100)
Wolfgang Betz 34:edda6a7238ec 21
Wolfgang Betz 34:edda6a7238ec 22 // betzw: switching force & back from standby is on some devices quite unstable
Wolfgang Betz 34:edda6a7238ec 23 #define USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 24
Wolfgang Betz 34:edda6a7238ec 25 /*** Class Implementation ***/
Wolfgang Betz 34:edda6a7238ec 26 /** Static Class Variables **/
Wolfgang Betz 34:edda6a7238ec 27 SimpleSpirit1 *SimpleSpirit1::_singleton = NULL;
Wolfgang Betz 34:edda6a7238ec 28
Wolfgang Betz 34:edda6a7238ec 29 /** Constructor **/
Wolfgang Betz 34:edda6a7238ec 30 SimpleSpirit1::SimpleSpirit1(PinName mosi, PinName miso, PinName sclk,
Wolfgang Betz 34:edda6a7238ec 31 PinName irq, PinName cs, PinName sdn,
Wolfgang Betz 34:edda6a7238ec 32 PinName led) :
Wolfgang Betz 34:edda6a7238ec 33 _spi(mosi, miso, sclk),
Wolfgang Betz 34:edda6a7238ec 34 _irq(irq),
Wolfgang Betz 34:edda6a7238ec 35 _chip_select(cs),
Wolfgang Betz 34:edda6a7238ec 36 _shut_down(sdn),
Wolfgang Betz 34:edda6a7238ec 37 _led(led),
Wolfgang Betz 34:edda6a7238ec 38 _current_irq_callback(),
Wolfgang Betz 34:edda6a7238ec 39 _rx_receiving_timeout()
Wolfgang Betz 34:edda6a7238ec 40 {
Wolfgang Betz 34:edda6a7238ec 41 }
Wolfgang Betz 34:edda6a7238ec 42
Wolfgang Betz 34:edda6a7238ec 43 /** Init Function **/
Wolfgang Betz 34:edda6a7238ec 44 void SimpleSpirit1::init() {
Wolfgang Betz 34:edda6a7238ec 45 /* reset irq disable counter and irq callback & disable irq */
Wolfgang Betz 34:edda6a7238ec 46 _nr_of_irq_disables = 0;
Wolfgang Betz 34:edda6a7238ec 47 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 48
Wolfgang Betz 34:edda6a7238ec 49 /* unselect chip */
Wolfgang Betz 34:edda6a7238ec 50 chip_unselect();
Wolfgang Betz 34:edda6a7238ec 51
Wolfgang Betz 34:edda6a7238ec 52 /* configure spi */
Wolfgang Betz 34:edda6a7238ec 53 _spi.format(8, 0); /* 8-bit, mode = 0, [order = SPI_MSB] only available in mbed3 */
Wolfgang Betz 34:edda6a7238ec 54 _spi.frequency(1000000); // 1MHz // betzw - NOTE: higher frequencies lead to instability of Spirit1
Wolfgang Betz 34:edda6a7238ec 55
Wolfgang Betz 34:edda6a7238ec 56 /* install irq handler */
Wolfgang Betz 34:edda6a7238ec 57 _irq.mode(PullUp);
Wolfgang Betz 34:edda6a7238ec 58 _irq.fall(Callback<void()>(this, &SimpleSpirit1::IrqHandler));
Wolfgang Betz 34:edda6a7238ec 59
Wolfgang Betz 34:edda6a7238ec 60 /* init cube vars */
Wolfgang Betz 34:edda6a7238ec 61 spirit_on = OFF;
Wolfgang Betz 34:edda6a7238ec 62 last_rssi = 0 ; //MGR
Wolfgang Betz 34:edda6a7238ec 63 last_sqi = 0 ; //MGR
Wolfgang Betz 34:edda6a7238ec 64
Wolfgang Betz 34:edda6a7238ec 65 /* set frequencies */
Wolfgang Betz 34:edda6a7238ec 66 radio_set_xtal_freq(XTAL_FREQUENCY);
Wolfgang Betz 34:edda6a7238ec 67 mgmt_set_freq_base((uint32_t)BASE_FREQUENCY);
Wolfgang Betz 34:edda6a7238ec 68
Wolfgang Betz 34:edda6a7238ec 69 /* restart board */
Wolfgang Betz 34:edda6a7238ec 70 enter_shutdown();
Wolfgang Betz 34:edda6a7238ec 71 exit_shutdown();
Wolfgang Betz 34:edda6a7238ec 72
Wolfgang Betz 34:edda6a7238ec 73 /* soft core reset */
Wolfgang Betz 34:edda6a7238ec 74 cmd_strobe(SPIRIT1_STROBE_SRES);
Wolfgang Betz 34:edda6a7238ec 75
Wolfgang Betz 34:edda6a7238ec 76 /* Configures the SPIRIT1 radio part */
Wolfgang Betz 34:edda6a7238ec 77 SRadioInit x_radio_init = {
Wolfgang Betz 34:edda6a7238ec 78 XTAL_OFFSET_PPM,
Wolfgang Betz 34:edda6a7238ec 79 (uint32_t)BASE_FREQUENCY,
Wolfgang Betz 34:edda6a7238ec 80 (uint32_t)CHANNEL_SPACE,
Wolfgang Betz 34:edda6a7238ec 81 CHANNEL_NUMBER,
Wolfgang Betz 34:edda6a7238ec 82 MODULATION_SELECT,
Wolfgang Betz 34:edda6a7238ec 83 DATARATE,
Wolfgang Betz 34:edda6a7238ec 84 (uint32_t)FREQ_DEVIATION,
Wolfgang Betz 34:edda6a7238ec 85 (uint32_t)BANDWIDTH
Wolfgang Betz 34:edda6a7238ec 86 };
Wolfgang Betz 34:edda6a7238ec 87 radio_init(&x_radio_init);
Wolfgang Betz 34:edda6a7238ec 88 radio_set_pa_level_dbm(0,POWER_DBM);
Wolfgang Betz 34:edda6a7238ec 89 radio_set_pa_level_max_index(0);
Wolfgang Betz 34:edda6a7238ec 90
Wolfgang Betz 34:edda6a7238ec 91 /* Configures the SPIRIT1 packet handler part*/
Wolfgang Betz 34:edda6a7238ec 92 PktBasicInit x_basic_init = {
Wolfgang Betz 34:edda6a7238ec 93 PREAMBLE_LENGTH,
Wolfgang Betz 34:edda6a7238ec 94 SYNC_LENGTH,
Wolfgang Betz 34:edda6a7238ec 95 SYNC_WORD,
Wolfgang Betz 34:edda6a7238ec 96 LENGTH_TYPE,
Wolfgang Betz 34:edda6a7238ec 97 LENGTH_WIDTH,
Wolfgang Betz 34:edda6a7238ec 98 CRC_MODE,
Wolfgang Betz 34:edda6a7238ec 99 CONTROL_LENGTH,
Wolfgang Betz 34:edda6a7238ec 100 EN_ADDRESS,
Wolfgang Betz 34:edda6a7238ec 101 EN_FEC,
Wolfgang Betz 34:edda6a7238ec 102 EN_WHITENING
Wolfgang Betz 34:edda6a7238ec 103 };
Wolfgang Betz 34:edda6a7238ec 104 pkt_basic_init(&x_basic_init);
Wolfgang Betz 34:edda6a7238ec 105
Wolfgang Betz 34:edda6a7238ec 106 /* Enable the following interrupt sources, routed to GPIO */
Wolfgang Betz 34:edda6a7238ec 107 irq_de_init(NULL);
Wolfgang Betz 34:edda6a7238ec 108 irq_clear_status();
Wolfgang Betz 34:edda6a7238ec 109 irq_set_status(TX_DATA_SENT, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 110 irq_set_status(RX_DATA_READY,S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 111 irq_set_status(RX_DATA_DISC, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 112 irq_set_status(TX_FIFO_ERROR, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 113 irq_set_status(RX_FIFO_ERROR, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 114 irq_set_status(RX_FIFO_ALMOST_FULL, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 115 irq_set_status(VALID_SYNC, S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 116
Wolfgang Betz 34:edda6a7238ec 117 /* Configure Spirit1 */
Wolfgang Betz 34:edda6a7238ec 118 radio_persistent_rx(S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 119 qi_set_sqi_threshold(SQI_TH_0);
Wolfgang Betz 34:edda6a7238ec 120 qi_sqi_check(S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 121 qi_set_rssi_threshold_dbm(CCA_THRESHOLD);
Wolfgang Betz 34:edda6a7238ec 122 timer_set_rx_timeout_stop_condition(SQI_ABOVE_THRESHOLD);
Wolfgang Betz 34:edda6a7238ec 123 timer_set_infinite_rx_timeout();
Wolfgang Betz 34:edda6a7238ec 124 radio_afc_freeze_on_sync(S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 125 calibration_rco(S_ENABLE);
Wolfgang Betz 34:edda6a7238ec 126
Wolfgang Betz 34:edda6a7238ec 127 spirit_on = OFF;
Wolfgang Betz 34:edda6a7238ec 128 CLEAR_TXBUF();
Wolfgang Betz 34:edda6a7238ec 129 CLEAR_RXBUF();
Wolfgang Betz 34:edda6a7238ec 130 _spirit_tx_started = false;
Wolfgang Betz 34:edda6a7238ec 131 _is_receiving = false;
Wolfgang Betz 34:edda6a7238ec 132
Wolfgang Betz 34:edda6a7238ec 133 /* Configure the radio to route the IRQ signal to its GPIO 3 */
Wolfgang Betz 34:edda6a7238ec 134 SGpioInit x_gpio_init = {
Wolfgang Betz 34:edda6a7238ec 135 SPIRIT_GPIO_IRQ,
Wolfgang Betz 34:edda6a7238ec 136 SPIRIT_GPIO_MODE_DIGITAL_OUTPUT_LP,
Wolfgang Betz 34:edda6a7238ec 137 SPIRIT_GPIO_DIG_OUT_IRQ
Wolfgang Betz 34:edda6a7238ec 138 };
Wolfgang Betz 34:edda6a7238ec 139 spirit_gpio_init(&x_gpio_init);
Wolfgang Betz 34:edda6a7238ec 140
Wolfgang Betz 34:edda6a7238ec 141 /* Setup CSMA/CA */
Wolfgang Betz 34:edda6a7238ec 142 CsmaInit x_csma_init = {
Wolfgang Betz 34:edda6a7238ec 143 S_ENABLE, // enable persistent mode
Wolfgang Betz 34:edda6a7238ec 144 TBIT_TIME_64, // Tcca time
Wolfgang Betz 34:edda6a7238ec 145 TCCA_TIME_3, // Lcca length
Wolfgang Betz 34:edda6a7238ec 146 3, // max nr of backoffs (<8)
Wolfgang Betz 34:edda6a7238ec 147 1, // BU counter seed
Wolfgang Betz 34:edda6a7238ec 148 8 // BU prescaler
Wolfgang Betz 34:edda6a7238ec 149 };
Wolfgang Betz 34:edda6a7238ec 150 csma_ca_init(&x_csma_init);
Wolfgang Betz 34:edda6a7238ec 151
Wolfgang Betz 34:edda6a7238ec 152 #ifdef RX_FIFO_THR_AO_CSMA_WA
Wolfgang Betz 34:edda6a7238ec 153 linear_fifo_set_almost_full_thr_rx(SPIRIT_MAX_FIFO_LEN-(MAX_PACKET_LEN+1));
Wolfgang Betz 34:edda6a7238ec 154 #endif
Wolfgang Betz 34:edda6a7238ec 155
Wolfgang Betz 34:edda6a7238ec 156 #ifdef USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 157 /* Puts the SPIRIT1 in STANDBY mode (125us -> rx/tx) */
Wolfgang Betz 34:edda6a7238ec 158 cmd_strobe(SPIRIT1_STROBE_STANDBY);
Wolfgang Betz 34:edda6a7238ec 159 #endif // USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 160 }
Wolfgang Betz 34:edda6a7238ec 161
Wolfgang Betz 34:edda6a7238ec 162 int SimpleSpirit1::send(const void *payload, unsigned int payload_len) {
Wolfgang Betz 34:edda6a7238ec 163 /* Checks if the payload length is supported */
Wolfgang Betz 34:edda6a7238ec 164 if(payload_len > MAX_PACKET_LEN) {
Wolfgang Betz 34:edda6a7238ec 165 return RADIO_TX_ERR;
Wolfgang Betz 34:edda6a7238ec 166 }
Wolfgang Betz 34:edda6a7238ec 167
Wolfgang Betz 34:edda6a7238ec 168 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 169
Wolfgang Betz 34:edda6a7238ec 170 BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_RX, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 171 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 172 if((last_state & SPIRIT1_STATE_STATEBITS) != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 173 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, last_state>>1);
Wolfgang Betz 34:edda6a7238ec 174 }
Wolfgang Betz 34:edda6a7238ec 175 #endif
Wolfgang Betz 34:edda6a7238ec 176
Wolfgang Betz 34:edda6a7238ec 177 /* Reset State to Ready */
Wolfgang Betz 34:edda6a7238ec 178 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 179
Wolfgang Betz 34:edda6a7238ec 180 cmd_strobe(SPIRIT1_STROBE_FTX); // flush TX FIFO buffer
Wolfgang Betz 34:edda6a7238ec 181
Wolfgang Betz 34:edda6a7238ec 182 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 183 debug_if(!(linear_fifo_read_num_elements_tx_fifo() == 0), "\n\rAssert failed in: %s (%d)\n\r", __func__, __LINE__);
Wolfgang Betz 34:edda6a7238ec 184 #endif
Wolfgang Betz 34:edda6a7238ec 185
Wolfgang Betz 34:edda6a7238ec 186 pkt_basic_set_payload_length(payload_len); // set desired payload len
Wolfgang Betz 34:edda6a7238ec 187
Wolfgang Betz 34:edda6a7238ec 188 #ifdef RX_FIFO_THR_AO_CSMA_WA
Wolfgang Betz 34:edda6a7238ec 189 // betzw - TODO: enabling CSMA/CA seems to be incompatible with TX FIFO usage (to be investigated)
Wolfgang Betz 34:edda6a7238ec 190 csma_ca_state(S_ENABLE); // enable CSMA/CA
Wolfgang Betz 34:edda6a7238ec 191 #endif
Wolfgang Betz 34:edda6a7238ec 192
Wolfgang Betz 34:edda6a7238ec 193 int i = 0;
Wolfgang Betz 34:edda6a7238ec 194 int remaining = payload_len;
Wolfgang Betz 34:edda6a7238ec 195 const uint8_t *buffer = (const uint8_t*)payload;
Wolfgang Betz 34:edda6a7238ec 196 bool tx_triggered = false;
Wolfgang Betz 34:edda6a7238ec 197 do {
Wolfgang Betz 34:edda6a7238ec 198 uint8_t fifo_available = SPIRIT_MAX_FIFO_LEN - linear_fifo_read_num_elements_tx_fifo();
Wolfgang Betz 34:edda6a7238ec 199 uint8_t to_send = (remaining > fifo_available) ? fifo_available : remaining;
Wolfgang Betz 34:edda6a7238ec 200
Wolfgang Betz 34:edda6a7238ec 201 /* Fill FIFO Buffer */
Wolfgang Betz 34:edda6a7238ec 202 if(to_send > 0) {
Wolfgang Betz 34:edda6a7238ec 203 spi_write_linear_fifo(to_send, (uint8_t*)&buffer[i]);
Wolfgang Betz 34:edda6a7238ec 204 }
Wolfgang Betz 34:edda6a7238ec 205
Wolfgang Betz 34:edda6a7238ec 206 if(!tx_triggered) {
Wolfgang Betz 34:edda6a7238ec 207 cmd_strobe(SPIRIT1_STROBE_TX);
Wolfgang Betz 34:edda6a7238ec 208 tx_triggered = true;
Wolfgang Betz 34:edda6a7238ec 209 }
Wolfgang Betz 34:edda6a7238ec 210
Wolfgang Betz 34:edda6a7238ec 211 i += to_send;
Wolfgang Betz 34:edda6a7238ec 212 remaining -= to_send;
Wolfgang Betz 34:edda6a7238ec 213 } while(remaining != 0);
Wolfgang Betz 34:edda6a7238ec 214
Wolfgang Betz 34:edda6a7238ec 215 _spirit_tx_started = true;
Wolfgang Betz 34:edda6a7238ec 216
Wolfgang Betz 34:edda6a7238ec 217 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 218
Wolfgang Betz 34:edda6a7238ec 219 BUSYWAIT_UNTIL(!_spirit_tx_started, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 220 #ifdef HEAVY_DEBUG
Wolfgang Betz 34:edda6a7238ec 221 debug("\n\r%s (%d): state=%x, _spirit_tx_started=%d\n\r", __func__, __LINE__, SPIRIT1_STATUS()>>1, _spirit_tx_started);
Wolfgang Betz 34:edda6a7238ec 222 #endif
Wolfgang Betz 34:edda6a7238ec 223
Wolfgang Betz 34:edda6a7238ec 224 _spirit_tx_started = false; // in case of state timeout
Wolfgang Betz 34:edda6a7238ec 225
Wolfgang Betz 34:edda6a7238ec 226 csma_ca_state(S_DISABLE); // disable CSMA/CA
Wolfgang Betz 34:edda6a7238ec 227 cmd_strobe(SPIRIT1_STROBE_RX); // Return to RX state
Wolfgang Betz 34:edda6a7238ec 228
Wolfgang Betz 34:edda6a7238ec 229 return RADIO_TX_OK;
Wolfgang Betz 34:edda6a7238ec 230 }
Wolfgang Betz 34:edda6a7238ec 231
Wolfgang Betz 34:edda6a7238ec 232 /** Set Ready State **/
Wolfgang Betz 34:edda6a7238ec 233 void SimpleSpirit1::set_ready_state(void) {
Wolfgang Betz 34:edda6a7238ec 234 uint16_t state;
Wolfgang Betz 34:edda6a7238ec 235
Wolfgang Betz 34:edda6a7238ec 236 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 237
Wolfgang Betz 34:edda6a7238ec 238 _spirit_tx_started = false;
Wolfgang Betz 34:edda6a7238ec 239 _is_receiving = false;
Wolfgang Betz 34:edda6a7238ec 240 stop_rx_timeout();
Wolfgang Betz 34:edda6a7238ec 241
Wolfgang Betz 34:edda6a7238ec 242 cmd_strobe(SPIRIT1_STROBE_FRX);
Wolfgang Betz 34:edda6a7238ec 243 CLEAR_RXBUF();
Wolfgang Betz 34:edda6a7238ec 244 CLEAR_TXBUF();
Wolfgang Betz 34:edda6a7238ec 245
Wolfgang Betz 34:edda6a7238ec 246 state = SPIRIT1_STATUS();
Wolfgang Betz 34:edda6a7238ec 247 if(state == SPIRIT1_STATE_STANDBY) {
Wolfgang Betz 34:edda6a7238ec 248 cmd_strobe(SPIRIT1_STROBE_READY);
Wolfgang Betz 34:edda6a7238ec 249 } else if(state == SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 250 cmd_strobe(SPIRIT1_STROBE_SABORT);
Wolfgang Betz 34:edda6a7238ec 251 } else if(state != SPIRIT1_STATE_READY) {
Wolfgang Betz 34:edda6a7238ec 252 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 253 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, state>>1);
Wolfgang Betz 34:edda6a7238ec 254 #endif
Wolfgang Betz 34:edda6a7238ec 255 }
Wolfgang Betz 34:edda6a7238ec 256
Wolfgang Betz 34:edda6a7238ec 257 BUSYWAIT_UNTIL((SPIRIT1_STATUS() == SPIRIT1_STATE_READY) && ((last_state & XO_ON) == XO_ON), STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 258 if(last_state != (SPIRIT1_STATE_READY | XO_ON)) {
Wolfgang Betz 34:edda6a7238ec 259 error("\n\rSpirit1: failed to become ready (%x) => pls. reset!\n\r", last_state);
Wolfgang Betz 34:edda6a7238ec 260 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 261 return;
Wolfgang Betz 34:edda6a7238ec 262 }
Wolfgang Betz 34:edda6a7238ec 263
Wolfgang Betz 34:edda6a7238ec 264 irq_clear_status();
Wolfgang Betz 34:edda6a7238ec 265
Wolfgang Betz 34:edda6a7238ec 266 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 267 }
Wolfgang Betz 34:edda6a7238ec 268
Wolfgang Betz 34:edda6a7238ec 269 int SimpleSpirit1::off(void) {
Wolfgang Betz 34:edda6a7238ec 270 if(spirit_on == ON) {
Wolfgang Betz 34:edda6a7238ec 271 /* Disables the mcu to get IRQ from the SPIRIT1 */
Wolfgang Betz 34:edda6a7238ec 272 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 273
Wolfgang Betz 34:edda6a7238ec 274 /* first stop rx/tx */
Wolfgang Betz 34:edda6a7238ec 275 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 276
Wolfgang Betz 34:edda6a7238ec 277 #ifdef USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 278 /* Puts the SPIRIT1 in STANDBY */
Wolfgang Betz 34:edda6a7238ec 279 cmd_strobe(SPIRIT1_STROBE_STANDBY);
Wolfgang Betz 34:edda6a7238ec 280 BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_STANDBY, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 281 if((last_state & SPIRIT1_STATE_STATEBITS) != SPIRIT1_STATE_STANDBY) {
Wolfgang Betz 34:edda6a7238ec 282 error("\n\rSpirit1: failed to enter standby (%x)\n\r", last_state>>1);
Wolfgang Betz 34:edda6a7238ec 283 return 1;
Wolfgang Betz 34:edda6a7238ec 284 }
Wolfgang Betz 34:edda6a7238ec 285 #endif // USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 286
Wolfgang Betz 34:edda6a7238ec 287 spirit_on = OFF;
Wolfgang Betz 34:edda6a7238ec 288 _nr_of_irq_disables = 1;
Wolfgang Betz 34:edda6a7238ec 289 }
Wolfgang Betz 34:edda6a7238ec 290 return 0;
Wolfgang Betz 34:edda6a7238ec 291 }
Wolfgang Betz 34:edda6a7238ec 292
Wolfgang Betz 34:edda6a7238ec 293 int SimpleSpirit1::on(void) {
Wolfgang Betz 34:edda6a7238ec 294 if(spirit_on == OFF) {
Wolfgang Betz 34:edda6a7238ec 295 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 296
Wolfgang Betz 34:edda6a7238ec 297 /* now we go to Rx */
Wolfgang Betz 34:edda6a7238ec 298 cmd_strobe(SPIRIT1_STROBE_RX);
Wolfgang Betz 34:edda6a7238ec 299
Wolfgang Betz 34:edda6a7238ec 300 BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_RX, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 301 if((last_state & SPIRIT1_STATE_STATEBITS) != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 302 error("\n\rSpirit1: failed to enter rx (%x) => retry\n\r", last_state>>1);
Wolfgang Betz 34:edda6a7238ec 303 }
Wolfgang Betz 34:edda6a7238ec 304
Wolfgang Betz 34:edda6a7238ec 305 /* Enables the mcu to get IRQ from the SPIRIT1 */
Wolfgang Betz 34:edda6a7238ec 306 spirit_on = ON;
Wolfgang Betz 34:edda6a7238ec 307 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 308 debug_if(!(_nr_of_irq_disables == 1), "\n\rAssert failed in: %s (%d)\n\r", __func__, __LINE__);
Wolfgang Betz 34:edda6a7238ec 309 #endif
Wolfgang Betz 34:edda6a7238ec 310 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 311 }
Wolfgang Betz 34:edda6a7238ec 312
Wolfgang Betz 34:edda6a7238ec 313 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 314 if(SPIRIT1_STATUS() != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 315 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, last_state>>1);
Wolfgang Betz 34:edda6a7238ec 316 }
Wolfgang Betz 34:edda6a7238ec 317 #endif
Wolfgang Betz 34:edda6a7238ec 318
Wolfgang Betz 34:edda6a7238ec 319 return 0;
Wolfgang Betz 34:edda6a7238ec 320 }
Wolfgang Betz 34:edda6a7238ec 321
Wolfgang Betz 34:edda6a7238ec 322 uint8_t SimpleSpirit1::refresh_state(void) {
Wolfgang Betz 34:edda6a7238ec 323 uint8_t mcstate;
Wolfgang Betz 34:edda6a7238ec 324
Wolfgang Betz 34:edda6a7238ec 325 SpiritSpiReadRegisters(MC_STATE0_BASE, 1, &mcstate);
Wolfgang Betz 34:edda6a7238ec 326
Wolfgang Betz 34:edda6a7238ec 327 return mcstate;
Wolfgang Betz 34:edda6a7238ec 328 }
Wolfgang Betz 34:edda6a7238ec 329
Wolfgang Betz 34:edda6a7238ec 330 int SimpleSpirit1::read(void *buf, unsigned int bufsize)
Wolfgang Betz 34:edda6a7238ec 331 {
Wolfgang Betz 34:edda6a7238ec 332 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 333
Wolfgang Betz 34:edda6a7238ec 334 /* Checks if the RX buffer is empty */
Wolfgang Betz 34:edda6a7238ec 335 if(IS_RXBUF_EMPTY()) {
Wolfgang Betz 34:edda6a7238ec 336 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 337
Wolfgang Betz 34:edda6a7238ec 338 cmd_strobe(SPIRIT1_STROBE_RX);
Wolfgang Betz 34:edda6a7238ec 339 BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_RX, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 340 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 341 return 0;
Wolfgang Betz 34:edda6a7238ec 342 }
Wolfgang Betz 34:edda6a7238ec 343
Wolfgang Betz 34:edda6a7238ec 344 if(bufsize < spirit_rx_len) {
Wolfgang Betz 34:edda6a7238ec 345 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 346
Wolfgang Betz 34:edda6a7238ec 347 /* If buf has the correct size */
Wolfgang Betz 34:edda6a7238ec 348 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 349 debug("\n\rTOO SMALL BUF\n\r");
Wolfgang Betz 34:edda6a7238ec 350 #endif
Wolfgang Betz 34:edda6a7238ec 351 return 0;
Wolfgang Betz 34:edda6a7238ec 352 } else {
Wolfgang Betz 34:edda6a7238ec 353 /* Copies the packet received */
Wolfgang Betz 34:edda6a7238ec 354 memcpy(buf, spirit_rx_buf, spirit_rx_len);
Wolfgang Betz 34:edda6a7238ec 355
Wolfgang Betz 34:edda6a7238ec 356 bufsize = spirit_rx_len;
Wolfgang Betz 34:edda6a7238ec 357 CLEAR_RXBUF();
Wolfgang Betz 34:edda6a7238ec 358
Wolfgang Betz 34:edda6a7238ec 359 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 360
Wolfgang Betz 34:edda6a7238ec 361 return bufsize;
Wolfgang Betz 34:edda6a7238ec 362 }
Wolfgang Betz 34:edda6a7238ec 363
Wolfgang Betz 34:edda6a7238ec 364 }
Wolfgang Betz 34:edda6a7238ec 365
Wolfgang Betz 34:edda6a7238ec 366 int SimpleSpirit1::channel_clear(void)
Wolfgang Betz 34:edda6a7238ec 367 {
Wolfgang Betz 34:edda6a7238ec 368 float rssi_value;
Wolfgang Betz 34:edda6a7238ec 369 /* Local variable used to memorize the SPIRIT1 state */
Wolfgang Betz 34:edda6a7238ec 370 uint8_t spirit_state = ON;
Wolfgang Betz 34:edda6a7238ec 371
Wolfgang Betz 34:edda6a7238ec 372 if(spirit_on == OFF) {
Wolfgang Betz 34:edda6a7238ec 373 /* Wakes up the SPIRIT1 */
Wolfgang Betz 34:edda6a7238ec 374 on();
Wolfgang Betz 34:edda6a7238ec 375 spirit_state = OFF;
Wolfgang Betz 34:edda6a7238ec 376 }
Wolfgang Betz 34:edda6a7238ec 377
Wolfgang Betz 34:edda6a7238ec 378 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 379 if(SPIRIT1_STATUS() != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 380 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, last_state>>1);
Wolfgang Betz 34:edda6a7238ec 381 }
Wolfgang Betz 34:edda6a7238ec 382 #endif
Wolfgang Betz 34:edda6a7238ec 383
Wolfgang Betz 34:edda6a7238ec 384 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 385
Wolfgang Betz 34:edda6a7238ec 386 /* Reset State to Ready */
Wolfgang Betz 34:edda6a7238ec 387 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 388
Wolfgang Betz 34:edda6a7238ec 389 /* Stores the RSSI value */
Wolfgang Betz 34:edda6a7238ec 390 rssi_value = qi_get_rssi_dbm();
Wolfgang Betz 34:edda6a7238ec 391
Wolfgang Betz 34:edda6a7238ec 392 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 393
Wolfgang Betz 34:edda6a7238ec 394 /* Puts the SPIRIT1 in its previous state */
Wolfgang Betz 34:edda6a7238ec 395 if(spirit_state==OFF) {
Wolfgang Betz 34:edda6a7238ec 396 off();
Wolfgang Betz 34:edda6a7238ec 397 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 398 #ifdef USE_STANDBY_STATE
Wolfgang Betz 34:edda6a7238ec 399 if(SPIRIT1_STATUS() != SPIRIT1_STATE_STANDBY) {
Wolfgang Betz 34:edda6a7238ec 400 #else
Wolfgang Betz 34:edda6a7238ec 401 if(SPIRIT1_STATUS() != SPIRIT1_STATE_READY) {
Wolfgang Betz 34:edda6a7238ec 402 #endif
Wolfgang Betz 34:edda6a7238ec 403 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, last_state>>1);
Wolfgang Betz 34:edda6a7238ec 404 }
Wolfgang Betz 34:edda6a7238ec 405 #endif
Wolfgang Betz 34:edda6a7238ec 406 } else {
Wolfgang Betz 34:edda6a7238ec 407 disable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 408
Wolfgang Betz 34:edda6a7238ec 409 set_ready_state();
Wolfgang Betz 34:edda6a7238ec 410
Wolfgang Betz 34:edda6a7238ec 411 cmd_strobe(SPIRIT1_STROBE_RX);
Wolfgang Betz 34:edda6a7238ec 412 BUSYWAIT_UNTIL(SPIRIT1_STATUS() == SPIRIT1_STATE_RX, STATE_TIMEOUT);
Wolfgang Betz 34:edda6a7238ec 413 if((last_state & SPIRIT1_STATE_STATEBITS) != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 414 error("\n\rSpirit1: (#2) failed to enter rx (%x) => retry\n\r", last_state>>1);
Wolfgang Betz 34:edda6a7238ec 415 }
Wolfgang Betz 34:edda6a7238ec 416
Wolfgang Betz 34:edda6a7238ec 417 enable_spirit_irq();
Wolfgang Betz 34:edda6a7238ec 418
Wolfgang Betz 34:edda6a7238ec 419 #ifndef NDEBUG
Wolfgang Betz 34:edda6a7238ec 420 if(SPIRIT1_STATUS() != SPIRIT1_STATE_RX) {
Wolfgang Betz 34:edda6a7238ec 421 debug("\n\rAssert failed in: %s (%d): state=%x\n\r", __func__, __LINE__, last_state>>1);
Wolfgang Betz 34:edda6a7238ec 422 }
Wolfgang Betz 34:edda6a7238ec 423 #endif
Wolfgang Betz 34:edda6a7238ec 424 }
Wolfgang Betz 34:edda6a7238ec 425
Wolfgang Betz 34:edda6a7238ec 426 /* Checks the RSSI value with the threshold */
Wolfgang Betz 34:edda6a7238ec 427 if(rssi_value<CCA_THRESHOLD) {
Wolfgang Betz 34:edda6a7238ec 428 return 0;
Wolfgang Betz 34:edda6a7238ec 429 } else {
Wolfgang Betz 34:edda6a7238ec 430 return 1;
Wolfgang Betz 34:edda6a7238ec 431 }
Wolfgang Betz 34:edda6a7238ec 432 }
Wolfgang Betz 34:edda6a7238ec 433
Wolfgang Betz 34:edda6a7238ec 434 int SimpleSpirit1::get_pending_packet(void)
Wolfgang Betz 34:edda6a7238ec 435 {
Wolfgang Betz 34:edda6a7238ec 436 return !IS_RXBUF_EMPTY();
Wolfgang Betz 34:edda6a7238ec 437 }
Wolfgang Betz 34:edda6a7238ec 438
Wolfgang Betz 34:edda6a7238ec 439 /** Spirit Irq Callback **/
Wolfgang Betz 34:edda6a7238ec 440 void SimpleSpirit1::IrqHandler() {
Wolfgang Betz 34:edda6a7238ec 441 st_lib_spirit_irqs x_irq_status;
Wolfgang Betz 34:edda6a7238ec 442
Wolfgang Betz 34:edda6a7238ec 443 /* get interrupt source from radio */
Wolfgang Betz 34:edda6a7238ec 444 irq_get_status(&x_irq_status);
Wolfgang Betz 34:edda6a7238ec 445
Wolfgang Betz 34:edda6a7238ec 446 /* Reception errors */
Wolfgang Betz 34:edda6a7238ec 447 if((x_irq_status.IRQ_RX_FIFO_ERROR) || (x_irq_status.IRQ_RX_DATA_DISC)) {
Wolfgang Betz 34:edda6a7238ec 448 #ifdef DEBUG_IRQ
Wolfgang Betz 34:edda6a7238ec 449 uint32_t *tmp = (uint32_t*)&x_irq_status;
Wolfgang Betz 34:edda6a7238ec 450 debug("\n\r%s (%d): irq=%x", __func__, __LINE__, *tmp);
Wolfgang Betz 34:edda6a7238ec 451 #endif
Wolfgang Betz 40:343254875d89 452 rx_timeout_handler();
Wolfgang Betz 34:edda6a7238ec 453 if(_spirit_tx_started) {
Wolfgang Betz 34:edda6a7238ec 454 _spirit_tx_started = false;
Wolfgang Betz 34:edda6a7238ec 455 /* call user callback */
Wolfgang Betz 34:edda6a7238ec 456 if(_current_irq_callback) {
Wolfgang Betz 34:edda6a7238ec 457 _current_irq_callback(TX_ERR);
Wolfgang Betz 34:edda6a7238ec 458 }
Wolfgang Betz 34:edda6a7238ec 459 }
Wolfgang Betz 40:343254875d89 460
Wolfgang Betz 40:343254875d89 461 /* Disable handling of other RX flags */
Wolfgang Betz 40:343254875d89 462 x_irq_status.IRQ_RX_DATA_READY = x_irq_status.IRQ_RX_FIFO_ALMOST_FULL = S_RESET;
Wolfgang Betz 34:edda6a7238ec 463 }
Wolfgang Betz 34:edda6a7238ec 464
Wolfgang Betz 34:edda6a7238ec 465 /* Transmission error */
Wolfgang Betz 34:edda6a7238ec 466 if(x_irq_status.IRQ_TX_FIFO_ERROR) {
Wolfgang Betz 34:edda6a7238ec 467 #ifdef DEBUG_IRQ
Wolfgang Betz 34:edda6a7238ec 468 uint32_t *tmp = (uint32_t*)&x_irq_status;
Wolfgang Betz 34:edda6a7238ec 469 debug("\n\r%s (%d): irq=%x", __func__, __LINE__, *tmp);
Wolfgang Betz 34:edda6a7238ec 470 #endif
Wolfgang Betz 34:edda6a7238ec 471 csma_ca_state(S_DISABLE); // disable CSMA/CA
Wolfgang Betz 34:edda6a7238ec 472 if(_spirit_tx_started) {
Wolfgang Betz 34:edda6a7238ec 473 _spirit_tx_started = false;
Wolfgang Betz 34:edda6a7238ec 474 /* call user callback */
Wolfgang Betz 34:edda6a7238ec 475 if(_current_irq_callback) {
Wolfgang Betz 34:edda6a7238ec 476 _current_irq_callback(TX_ERR);
Wolfgang Betz 34:edda6a7238ec 477 }
Wolfgang Betz 34:edda6a7238ec 478 }
Wolfgang Betz 40:343254875d89 479
Wolfgang Betz 40:343254875d89 480 /* Disable handling of other TX flags */
Wolfgang Betz 40:343254875d89 481 x_irq_status.IRQ_TX_DATA_SENT = S_RESET;
Wolfgang Betz 34:edda6a7238ec 482 }
Wolfgang Betz 34:edda6a7238ec 483
Wolfgang Betz 34:edda6a7238ec 484 /* The IRQ_TX_DATA_SENT notifies the packet received. Puts the SPIRIT1 in RX */
Wolfgang Betz 34:edda6a7238ec 485 if(x_irq_status.IRQ_TX_DATA_SENT) {
Wolfgang Betz 34:edda6a7238ec 486 #ifdef DEBUG_IRQ
Wolfgang Betz 34:edda6a7238ec 487 debug_if(!_spirit_tx_started, "\n\rAssert failed in: %s (%d)\n\r", __func__, __LINE__);
Wolfgang Betz 34:edda6a7238ec 488 #endif
Wolfgang Betz 34:edda6a7238ec 489
Wolfgang Betz 34:edda6a7238ec 490 _spirit_tx_started = false;
Wolfgang Betz 34:edda6a7238ec 491
Wolfgang Betz 34:edda6a7238ec 492 /* call user callback */
Wolfgang Betz 34:edda6a7238ec 493 if(_current_irq_callback) {
Wolfgang Betz 34:edda6a7238ec 494 _current_irq_callback(TX_DONE);
Wolfgang Betz 34:edda6a7238ec 495 }
Wolfgang Betz 34:edda6a7238ec 496 }
Wolfgang Betz 34:edda6a7238ec 497
Wolfgang Betz 34:edda6a7238ec 498 /* RX FIFO almost full */
Wolfgang Betz 34:edda6a7238ec 499 if(x_irq_status.IRQ_RX_FIFO_ALMOST_FULL) {
Wolfgang Betz 40:343254875d89 500 uint8_t fifo_available = linear_fifo_read_num_elements_rx_fifo();
Wolfgang Betz 40:343254875d89 501 unsigned int remaining = MAX_PACKET_LEN - _spirit_rx_pos;
Wolfgang Betz 40:343254875d89 502 if(fifo_available > remaining) {
Wolfgang Betz 40:343254875d89 503 #ifdef DEBUG_IRQ
Wolfgang Betz 40:343254875d89 504 uint32_t *tmp = (uint32_t*)&x_irq_status;
Wolfgang Betz 40:343254875d89 505 debug("\n\r%s (%d): irq=%x", __func__, __LINE__, *tmp);
Wolfgang Betz 40:343254875d89 506 #endif
Wolfgang Betz 40:343254875d89 507 rx_timeout_handler();
Wolfgang Betz 34:edda6a7238ec 508 } else {
Wolfgang Betz 40:343254875d89 509 spi_read_linear_fifo(fifo_available, &spirit_rx_buf[_spirit_rx_pos]);
Wolfgang Betz 40:343254875d89 510 _spirit_rx_pos += fifo_available;
Wolfgang Betz 40:343254875d89 511 if(!_is_receiving) {
Wolfgang Betz 40:343254875d89 512 _is_receiving = true;
Wolfgang Betz 40:343254875d89 513 start_rx_timeout();
Wolfgang Betz 34:edda6a7238ec 514 }
Wolfgang Betz 34:edda6a7238ec 515 }
Wolfgang Betz 34:edda6a7238ec 516 }
Wolfgang Betz 34:edda6a7238ec 517
Wolfgang Betz 34:edda6a7238ec 518 /* The IRQ_RX_DATA_READY notifies a new packet arrived */
Wolfgang Betz 34:edda6a7238ec 519 if(x_irq_status.IRQ_RX_DATA_READY) {
Wolfgang Betz 34:edda6a7238ec 520 _is_receiving = false; // Finished receiving
Wolfgang Betz 34:edda6a7238ec 521 stop_rx_timeout();
Wolfgang Betz 34:edda6a7238ec 522
Wolfgang Betz 40:343254875d89 523 spirit_rx_len = pkt_basic_get_received_pkt_length();
Wolfgang Betz 34:edda6a7238ec 524
Wolfgang Betz 34:edda6a7238ec 525 #ifdef DEBUG_IRQ
Wolfgang Betz 40:343254875d89 526 debug_if(!(spirit_rx_len <= MAX_PACKET_LEN), "\n\rAssert failed in: %s (%d)\n\r", __func__, __LINE__);
Wolfgang Betz 34:edda6a7238ec 527 #endif
Wolfgang Betz 34:edda6a7238ec 528
Wolfgang Betz 40:343254875d89 529 for(; _spirit_rx_pos < spirit_rx_len;) {
Wolfgang Betz 40:343254875d89 530 uint8_t to_receive = spirit_rx_len - _spirit_rx_pos;
Wolfgang Betz 40:343254875d89 531 if(to_receive > 0) {
Wolfgang Betz 40:343254875d89 532 spi_read_linear_fifo(to_receive, &spirit_rx_buf[_spirit_rx_pos]);
Wolfgang Betz 40:343254875d89 533 _spirit_rx_pos += to_receive;
Wolfgang Betz 34:edda6a7238ec 534 }
Wolfgang Betz 40:343254875d89 535 }
Wolfgang Betz 34:edda6a7238ec 536
Wolfgang Betz 40:343254875d89 537 cmd_strobe(SPIRIT1_STROBE_FRX);
Wolfgang Betz 34:edda6a7238ec 538
Wolfgang Betz 40:343254875d89 539 last_rssi = qi_get_rssi(); //MGR
Wolfgang Betz 40:343254875d89 540 last_sqi = qi_get_sqi(); //MGR
Wolfgang Betz 40:343254875d89 541
Wolfgang Betz 40:343254875d89 542 /* call user callback */
Wolfgang Betz 40:343254875d89 543 if(_current_irq_callback) {
Wolfgang Betz 40:343254875d89 544 _current_irq_callback(RX_DONE);
Wolfgang Betz 34:edda6a7238ec 545 }
Wolfgang Betz 34:edda6a7238ec 546 }
Wolfgang Betz 34:edda6a7238ec 547
Wolfgang Betz 34:edda6a7238ec 548 /* The IRQ_VALID_SYNC is used to notify a new packet is coming */
Wolfgang Betz 34:edda6a7238ec 549 if(x_irq_status.IRQ_VALID_SYNC) {
Wolfgang Betz 39:75481c4c6655 550 /* betzw - NOTE: there is a race condition between Spirit1 receiving packets and
Wolfgang Betz 39:75481c4c6655 551 * the MCU trying to send a packet, which gets resolved in favor of
Wolfgang Betz 39:75481c4c6655 552 * sending.
Wolfgang Betz 39:75481c4c6655 553 */
Wolfgang Betz 39:75481c4c6655 554 if(_spirit_tx_started) {
Wolfgang Betz 34:edda6a7238ec 555 #ifdef DEBUG_IRQ
Wolfgang Betz 39:75481c4c6655 556 uint32_t *tmp = (uint32_t*)&x_irq_status;
Wolfgang Betz 39:75481c4c6655 557 debug("\n\r%s (%d): irq=%x", __func__, __LINE__, *tmp);
Wolfgang Betz 34:edda6a7238ec 558 #endif
Wolfgang Betz 39:75481c4c6655 559 } else {
Wolfgang Betz 39:75481c4c6655 560 _is_receiving = true;
Wolfgang Betz 39:75481c4c6655 561 start_rx_timeout();
Wolfgang Betz 39:75481c4c6655 562 }
Wolfgang Betz 34:edda6a7238ec 563 }
Wolfgang Betz 34:edda6a7238ec 564 }