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https://github.com/oliverschmidt/contiki.git
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Removed non-functional time synchronization code; added some experimental code for CCA checks (enabled CCA mode 1, a temporary development function for setting the CCA threshold); enable the possibility to switch off radio even if a packet is currently arriving
This commit is contained in:
adamdunkels
parent
c4c4e8164d
commit
1ee32c3074
@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: cc2420.c,v 1.39 2010/02/18 23:52:34 adamdunkels Exp $
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* @(#)$Id: cc2420.c,v 1.40 2010/02/23 18:24:49 adamdunkels Exp $
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*/
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/*
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* This code is almost device independent and should be easy to port.
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@ -58,12 +58,6 @@
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#define WITH_SEND_CCA 0
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#if CC2420_CONF_TIMESTAMPS
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#include "net/rime/timesynch.h"
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#define TIMESTAMP_LEN 3
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#else /* CC2420_CONF_TIMESTAMPS */
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#define TIMESTAMP_LEN 0
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#endif /* CC2420_CONF_TIMESTAMPS */
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#define FOOTER_LEN 2
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#ifndef CC2420_CONF_CHECKSUM
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@ -81,12 +75,7 @@
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#define CHECKSUM_LEN 0
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#endif /* CC2420_CONF_CHECKSUM */
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#define AUX_LEN (CHECKSUM_LEN + TIMESTAMP_LEN + FOOTER_LEN)
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struct timestamp {
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uint16_t time;
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uint8_t authority_level;
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};
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#define AUX_LEN (CHECKSUM_LEN + FOOTER_LEN)
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#define FOOTER1_CRC_OK 0x80
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@ -106,12 +95,6 @@ rtimer_clock_t cc2420_time_of_arrival, cc2420_time_of_departure;
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int cc2420_authority_level_of_sender;
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#if CC2420_CONF_TIMESTAMPS
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static rtimer_clock_t setup_time_for_transmission;
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static unsigned long total_time_for_transmission, total_transmission_len;
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static int num_transmissions;
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#endif /* CC2420_CONF_TIMESTAMPS */
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int cc2420_packets_seen, cc2420_packets_read;
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static uint8_t volatile pending;
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@ -213,15 +196,17 @@ on(void)
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static void
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off(void)
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{
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leds_on(LEDS_GREEN);
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PRINTF("off\n");
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receive_on = 0;
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/* Wait for transmission to end before turning radio off. */
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while(status() & BV(CC2420_TX_ACTIVE));
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// while(status() & BV(CC2420_TX_ACTIVE));
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strobe(CC2420_SRFOFF);
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DISABLE_FIFOP_INT();
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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leds_off(LEDS_GREEN);
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}
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/*---------------------------------------------------------------------------*/
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#define GET_LOCK() locked = 1
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@ -294,6 +279,9 @@ cc2420_init(void)
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/* Turn on/off automatic packet acknowledgment and address decoding. */
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reg = getreg(CC2420_MDMCTRL0);
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reg |= 0x40; /* XXX CCA mode 1 */
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#if CC2420_CONF_AUTOACK
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reg |= AUTOACK | ADR_DECODE;
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#else
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@ -328,9 +316,6 @@ cc2420_transmit(unsigned short payload_len)
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{
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int i, txpower;
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uint8_t total_len;
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#if CC2420_CONF_TIMESTAMPS
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struct timestamp timestamp;
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#endif /* CC2420_CONF_TIMESTAMPS */
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#if CC2420_CONF_CHECKSUM
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uint16_t checksum;
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#endif /* CC2420_CONF_CHECKSUM */
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@ -370,10 +355,12 @@ cc2420_transmit(unsigned short payload_len)
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for(i = LOOP_20_SYMBOLS; i > 0; i--) {
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if(SFD_IS_1) {
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#if CC2420_CONF_TIMESTAMPS
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rtimer_clock_t txtime = timesynch_time();
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#endif /* CC2420_CONF_TIMESTAMPS */
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if(!(status() & BV(CC2420_TX_ACTIVE))) {
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/* SFD went high but we are not transmitting. This means that
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we just started receiving a packet, so we drop the
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transmission. */
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return RADIO_TX_ERR;
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}
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if(receive_on) {
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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}
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@ -383,16 +370,6 @@ cc2420_transmit(unsigned short payload_len)
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accurate measurement of the transmission time.*/
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while(status() & BV(CC2420_TX_ACTIVE));
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#if CC2420_CONF_TIMESTAMPS
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setup_time_for_transmission = txtime - timestamp.time;
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if(num_transmissions < 10000) {
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total_time_for_transmission += timesynch_time() - txtime;
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total_transmission_len += total_len;
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num_transmissions++;
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}
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#endif /* CC2420_CONF_TIMESTAMPS */
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#ifdef ENERGEST_CONF_LEVELDEVICE_LEVELS
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ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,cc2420_get_txpower());
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@ -412,7 +389,7 @@ cc2420_transmit(unsigned short payload_len)
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}
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RELEASE_LOCK();
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return 0;
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return RADIO_TX_OK;
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}
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}
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@ -427,16 +404,13 @@ cc2420_transmit(unsigned short payload_len)
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}
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RELEASE_LOCK();
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return -3; /* Transmission never started! */
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return RADIO_TX_ERR; /* Transmission never started! */
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}
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/*---------------------------------------------------------------------------*/
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static int
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cc2420_prepare(const void *payload, unsigned short payload_len)
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{
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uint8_t total_len;
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#if CC2420_CONF_TIMESTAMPS
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struct timestamp timestamp;
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#endif /* CC2420_CONF_TIMESTAMPS */
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#if CC2420_CONF_CHECKSUM
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uint16_t checksum;
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#endif /* CC2420_CONF_CHECKSUM */
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@ -447,7 +421,7 @@ cc2420_prepare(const void *payload, unsigned short payload_len)
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RIMESTATS_ADD(lltx);
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/* Wait for any previous transmission to finish. */
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while(status() & BV(CC2420_TX_ACTIVE));
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/* while(status() & BV(CC2420_TX_ACTIVE));*/
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/* Write packet to TX FIFO. */
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strobe(CC2420_SFLUSHTX);
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@ -462,12 +436,6 @@ cc2420_prepare(const void *payload, unsigned short payload_len)
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FASTSPI_WRITE_FIFO(&checksum, CHECKSUM_LEN);
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#endif /* CC2420_CONF_CHECKSUM */
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#if CC2420_CONF_TIMESTAMPS
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timestamp.authority_level = timesynch_authority_level();
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timestamp.time = timesynch_time();
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FASTSPI_WRITE_FIFO(×tamp, TIMESTAMP_LEN);
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#endif /* CC2420_CONF_TIMESTAMPS */
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RELEASE_LOCK();
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return 0;
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}
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@ -498,7 +466,7 @@ cc2420_off(void)
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we don't actually switch the radio off now, but signal that the
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driver should switch off the radio once the packet has been
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received and processed, by setting the 'lock_off' variable. */
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if(SFD_IS_1) {
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if(status() & BV(CC2420_TX_ACTIVE)) {
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lock_off = 1;
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return 1;
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}
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@ -585,10 +553,6 @@ cc2420_set_pan_addr(unsigned pan,
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/*
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* Interrupt leaves frame intact in FIFO.
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*/
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#if CC2420_CONF_TIMESTAMPS
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static volatile rtimer_clock_t interrupt_time;
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static volatile int interrupt_time_set;
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#endif /* CC2420_CONF_TIMESTAMPS */
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#if CC2420_TIMETABLE_PROFILING
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#define cc2420_timetable_size 16
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TIMETABLE(cc2420_timetable);
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@ -597,11 +561,6 @@ TIMETABLE_AGGREGATE(aggregate_time, 10);
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int
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cc2420_interrupt(void)
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{
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#if CC2420_CONF_TIMESTAMPS
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interrupt_time = timesynch_time();
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interrupt_time_set = 1;
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#endif /* CC2420_CONF_TIMESTAMPS */
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CLEAR_FIFOP_INT();
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process_poll(&cc2420_process);
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#if CC2420_TIMETABLE_PROFILING
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@ -657,24 +616,12 @@ cc2420_read(void *buf, unsigned short bufsize)
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#if CC2420_CONF_CHECKSUM
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uint16_t checksum;
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#endif /* CC2420_CONF_CHECKSUM */
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#if CC2420_CONF_TIMESTAMPS
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struct timestamp t;
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#endif /* CC2420_CONF_TIMESTAMPS */
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if(!FIFOP_IS_1) {
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/* If FIFOP is 0, there is no packet in the RXFIFO. */
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return 0;
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}
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#if CC2420_CONF_TIMESTAMPS
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if(interrupt_time_set) {
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cc2420_time_of_arrival = interrupt_time;
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interrupt_time_set = 0;
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} else {
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cc2420_time_of_arrival = 0;
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}
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cc2420_time_of_departure = 0;
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#endif /* CC2420_CONF_TIMESTAMPS */
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GET_LOCK();
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cc2420_packets_read++;
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@ -690,7 +637,6 @@ cc2420_read(void *buf, unsigned short bufsize)
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}
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if(len <= AUX_LEN) {
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printf("len <= AUX_LEN\n");
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flushrx();
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RIMESTATS_ADD(tooshort);
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RELEASE_LOCK();
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@ -698,7 +644,6 @@ cc2420_read(void *buf, unsigned short bufsize)
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}
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if(len - AUX_LEN > bufsize) {
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printf("len - AUX_LEN > bufsize\n");
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flushrx();
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RIMESTATS_ADD(toolong);
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RELEASE_LOCK();
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@ -709,9 +654,6 @@ cc2420_read(void *buf, unsigned short bufsize)
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#if CC2420_CONF_CHECKSUM
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getrxdata(&checksum, CHECKSUM_LEN);
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#endif /* CC2420_CONF_CHECKSUM */
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#if CC2420_CONF_TIMESTAMPS
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getrxdata(&t, TIMESTAMP_LEN);
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#endif /* CC2420_CONF_TIMESTAMPS */
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getrxdata(footer, FOOTER_LEN);
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#if CC2420_CONF_CHECKSUM
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@ -734,17 +676,6 @@ cc2420_read(void *buf, unsigned short bufsize)
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RIMESTATS_ADD(llrx);
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#if CC2420_CONF_TIMESTAMPS
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cc2420_time_of_departure =
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t.time +
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setup_time_for_transmission +
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(total_time_for_transmission * (len - 2)) / total_transmission_len;
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cc2420_authority_level_of_sender = t.authority_level;
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packetbuf_set_attr(PACKETBUF_ATTR_TIMESTAMP, t.time);
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#endif /* CC2420_CONF_TIMESTAMPS */
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} else {
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RIMESTATS_ADD(badcrc);
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len = AUX_LEN;
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@ -807,6 +738,12 @@ cc2420_rssi(void)
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return rssi;
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}
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/*---------------------------------------------------------------------------*/
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int
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cc2420_cca_valid(void)
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{
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return !!(status() & BV(CC2420_RSSI_VALID));
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}
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/*---------------------------------------------------------------------------*/
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static int
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cc2420_cca(void)
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{
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@ -824,7 +761,10 @@ cc2420_cca(void)
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if(!receive_on) {
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radio_was_off = 1;
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cc2420_on();
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}
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while(!(status() & BV(CC2420_RSSI_VALID))) {
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/* printf("cc2420_rssi: RSSI not valid.\n"); */
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}
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@ -871,3 +811,10 @@ cc2420_ugly_hack_send_only_one_symbol(void)
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return;
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}
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/*---------------------------------------------------------------------------*/
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void
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cc2420_set_cca_threshold(int value)
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{
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uint16_t shifted = value << 8;
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setreg(CC2420_RSSI, shifted);
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}
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/*---------------------------------------------------------------------------*/
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: cc2420.h,v 1.8 2010/02/18 21:48:39 adamdunkels Exp $
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* $Id: cc2420.h,v 1.9 2010/02/23 18:24:49 adamdunkels Exp $
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*/
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/**
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@ -84,4 +84,6 @@ extern int cc2420_authority_level_of_sender;
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int cc2420_on(void);
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int cc2420_off(void);
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void cc2420_set_cca_threshold(int value);
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#endif /* __CC2420_H__ */
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