Changed default transmission behaviour to be to send without checking for channel activity first (in anticipation of radio API change that adds a CCA function to the radio API). General code cleanup. Added optional timetable profiling. Added simple_cc2420_get_channel() function, changed simple_cc2420_set_chan_pan to simple_cc2420_set_pan since we now have a dedicated simple_cc2420_set_channel
This commit is contained in:
adamdunkels
parent
10ce1ed03e
commit
2c5964ef55
@ -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: simple-cc2420.c,v 1.24 2008/01/17 15:38:45 fros4943 Exp $
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* @(#)$Id: simple-cc2420.c,v 1.25 2008/01/23 14:57:19 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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@ -51,6 +51,9 @@
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#include "net/rime/rimestats.h"
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#include "sys/timetable.h"
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#define WITH_SEND_CCA 0
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#define FOOTER_LEN 2
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#define CRC_LEN 2
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@ -106,7 +109,7 @@ void simple_cc2420_set_receiver(void (* recv)(const struct radio_driver *d));
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signed char simple_cc2420_last_rssi;
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u8_t simple_cc2420_last_correlation;
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uint8_t simple_cc2420_last_correlation;
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const struct radio_driver simple_cc2420_driver =
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{
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@ -117,9 +120,12 @@ const struct radio_driver simple_cc2420_driver =
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simple_cc2420_off,
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};
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static u8_t receive_on;
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static uint8_t receive_on;
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/* Radio stuff in network byte order. */
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static u16_t pan_id;
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static uint16_t pan_id;
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static int channel;
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/*---------------------------------------------------------------------------*/
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static void
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strobe(enum cc2420_register regname)
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@ -130,7 +136,7 @@ strobe(enum cc2420_register regname)
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static unsigned int
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status(void)
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{
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u8_t status;
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uint8_t status;
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FASTSPI_UPD_STATUS(status);
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return status;
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}
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@ -138,18 +144,21 @@ status(void)
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static void
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on(void)
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{
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uint8_t dummy;
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ENERGEST_ON(ENERGEST_TYPE_LISTEN);
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PRINTF("on\n");
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receive_on = 1;
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strobe(CC2420_SRXON);
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FASTSPI_READ_FIFO_BYTE(dummy);
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strobe(CC2420_SFLUSHRX);
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strobe(CC2420_SFLUSHRX);
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ENABLE_FIFOP_INT();
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}
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static void
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off(void)
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{
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u8_t spiStatusByte;
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uint8_t spiStatusByte;
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PRINTF("off\n");
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receive_on = 0;
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@ -163,7 +172,7 @@ off(void)
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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}
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/*---------------------------------------------------------------------------*/
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static u8_t locked, lock_on, lock_off;
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static uint8_t locked, lock_on, lock_off;
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#define GET_LOCK() locked = 1
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static void RELEASE_LOCK(void) {
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if(lock_on) {
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@ -207,7 +216,7 @@ simple_cc2420_set_receiver(void (* recv)(const struct radio_driver *))
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void
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simple_cc2420_init(void)
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{
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u16_t reg;
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uint16_t reg;
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{
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int s = splhigh();
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simple_cc2420_arch_init(); /* Initalize ports and SPI. */
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@ -253,7 +262,8 @@ simple_cc2420_init(void)
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reg &= ~RXFIFO_PROTECTION;
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setreg(CC2420_SECCTRL0, reg);
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simple_cc2420_set_chan_pan_addr(11, 0xffff, 0x0000, NULL);
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simple_cc2420_set_pan_addr(0xffff, 0x0000, NULL);
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simple_cc2420_set_channel(26);
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process_start(&simple_cc2420_process, NULL);
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}
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@ -261,30 +271,17 @@ simple_cc2420_init(void)
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int
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simple_cc2420_send(const void *payload, unsigned short payload_len)
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{
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uint8_t spiStatusByte;
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int i;
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uint8_t total_len;
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struct timestamp timestamp;
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/* This code uses the CC2420 CCA (Clear Channel Assessment) to
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* implement Carrier Sense Multiple Access with Collision Avoidance
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* (CSMA-CA) and requires the receiver to be enabled and ready.
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*/
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if(!receive_on) {
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return -2;
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}
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/* PRINTF("simple_cc2420_send: %d bytes\n", payload_len);*/
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GET_LOCK();
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RIMESTATS_ADD(lltx);
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/* Wait for previous transmission to finish and RSSI. */
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do {
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spiStatusByte = status();
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} while(spiStatusByte & BV(CC2420_TX_ACTIVE) ||
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!(spiStatusByte & BV(CC2420_RSSI_VALID)));
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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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/* Write packet to TX FIFO. */
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strobe(CC2420_SFLUSHTX);
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@ -300,14 +297,7 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
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FASTSPI_WRITE_FIFO(×tamp, TIMESTAMP_LEN);
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#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
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if(FIFOP_IS_1 && !FIFO_IS_1) {
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/* RXFIFO overflow, send on retransmit. */
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PRINTF("rxfifo overflow!\n");
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RELEASE_LOCK();
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return -4;
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}
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/* The TX FIFO can only hold one packet! Make sure to not overrun
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/* The TX FIFO can only hold one packet. Make sure to not overrun
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* FIFO by waiting for transmission to start here and synchronizing
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* with the CC2420_TX_ACTIVE check in cc2420_send.
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*
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@ -319,17 +309,26 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
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#elif __AVR__
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#define LOOP_20_SYMBOLS 500 /* XXX */
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#endif
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#if WITH_SEND_CCA
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strobe(CC2420_SRXON);
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while(!(status() & BV(CC2420_RSSI_VALID)));
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strobe(CC2420_STXONCCA);
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#else /* WITH_SEND_CCA */
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strobe(CC2420_STXON);
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#endif /* WITH_SEND_CCA */
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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 SIMPLE_CC2420_CONF_TIMESTAMPS
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rtimer_clock_t txtime = timesynch_time();
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/* PRINTF("simple_cc2420: do_send() transmission has started\n");*/
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#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
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do {
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spiStatusByte = status();
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} while(spiStatusByte & BV(CC2420_TX_ACTIVE));
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while(status() & BV(CC2420_TX_ACTIVE));
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#if SIMPLE_CC2420_CONF_TIMESTAMPS
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setup_time_for_transmission = txtime - timestamp.time;
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@ -340,8 +339,9 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
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}
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#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
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#ifdef ENERGEST_CONF_LEVELDEVICE_LEVELS
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ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,simple_cc2420_get_txpower());
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ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,simple_cc2420_get_txpower());
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#endif
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ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
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ENERGEST_ON(ENERGEST_TYPE_LISTEN);
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@ -350,13 +350,16 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
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return 0; /* Transmission has started. */
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}
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}
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/* If we are using WITH_SEND_CCA, we get here if the packet wasn't
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transmitted because of other channel activity. */
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RIMESTATS_ADD(contentiondrop);
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PRINTF("simple_cc2420: do_send() transmission never started\n");
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RELEASE_LOCK();
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return -3; /* Transmission never started! */
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}
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/*---------------------------------------------------------------------------*/
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static volatile u8_t packet_seen;
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static volatile uint8_t packet_seen;
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/*---------------------------------------------------------------------------*/
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int
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simple_cc2420_off(void)
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@ -394,12 +397,24 @@ simple_cc2420_on(void)
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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void
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simple_cc2420_set_channel(int channel)
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int
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simple_cc2420_get_channel(void)
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{
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u16_t f = channel;
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return channel;
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}
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/*---------------------------------------------------------------------------*/
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void
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simple_cc2420_set_channel(int c)
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{
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uint16_t f;
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/*
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* Subtract the base channel (11), multiply by 5, which is the
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* channel spacing. 357 is 2405-2048 and 0x4000 is LOCK_THR = 1.
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*/
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f = 5 * (f - 11) + 357 + 0x4000;
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channel = c;
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f = 5 * (c - 11) + 357 + 0x4000;
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/*
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* Writing RAM requires crystal oscillator to be stable.
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*/
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@ -409,28 +424,17 @@ simple_cc2420_set_channel(int channel)
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}
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/*---------------------------------------------------------------------------*/
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void
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simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
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unsigned pan,
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unsigned addr,
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const u8_t *ieee_addr)
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simple_cc2420_set_pan_addr(unsigned pan,
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unsigned addr,
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const uint8_t *ieee_addr)
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{
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/*
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* Subtract the base channel (11), multiply by 5, which is the
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* channel spacing. 357 is 2405-2048 and 0x4000 is LOCK_THR = 1.
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*/
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u8_t spiStatusByte;
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u16_t f = channel;
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f = 5 * (f - 11) + 357 + 0x4000;
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uint16_t f = 0;
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/*
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* Writing RAM requires crystal oscillator to be stable.
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*/
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do {
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spiStatusByte = status();
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} while(!(spiStatusByte & (BV(CC2420_XOSC16M_STABLE))));
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while(!(status() & (BV(CC2420_XOSC16M_STABLE))));
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pan_id = pan;
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setreg(CC2420_FSCTRL, f);
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FASTSPI_WRITE_RAM_LE(&pan, CC2420RAM_PANID, 2, f);
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FASTSPI_WRITE_RAM_LE(&addr, CC2420RAM_SHORTADDR, 2, f);
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if(ieee_addr != NULL) {
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@ -439,14 +443,15 @@ simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
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}
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/*---------------------------------------------------------------------------*/
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/*
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* Interrupt either leaves frame intact in FIFO or reads *only* the
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* MAC header and sets rx_fifo_remaining_bytes.
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*
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* In order to quickly empty the FIFO ack processing is done at
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* interrupt priority rather than poll priority.
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* Interrupt either leaves frame intact in FIFO.
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*/
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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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#if SIMPLE_CC2420_TIMETABLE_PROFILING
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#define simple_cc2420_timetable_size 16
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TIMETABLE(simple_cc2420_timetable);
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TIMETABLE_AGGREGATE(aggregate_time, 10);
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#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
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int
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simple_cc2420_interrupt(void)
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{
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@ -455,7 +460,11 @@ simple_cc2420_interrupt(void)
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CLEAR_FIFOP_INT();
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process_poll(&simple_cc2420_process);
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packet_seen = 1;
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packet_seen++;
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#if SIMPLE_CC2420_TIMETABLE_PROFILING
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timetable_clear(&simple_cc2420_timetable);
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TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "interrupt");
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#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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@ -465,13 +474,22 @@ PROCESS_THREAD(simple_cc2420_process, ev, data)
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while(1) {
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PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
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/* printf("Diff %d\n", rtimer_arch_now() - interrupt_time);*/
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#if SIMPLE_CC2420_TIMETABLE_PROFILING
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TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "poll");
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#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
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if(receiver_callback != NULL) {
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receiver_callback(&simple_cc2420_driver);
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#if SIMPLE_CC2420_TIMETABLE_PROFILING
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TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "end");
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timetable_aggregate_compute_detailed(&aggregate_time,
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&simple_cc2420_timetable);
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timetable_clear(&simple_cc2420_timetable);
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#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
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} else {
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uint8_t dummy;
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PRINTF("simple_cc2420_process not receiving function\n");
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FASTSPI_READ_FIFO_BYTE(dummy);
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FASTSPI_STROBE(CC2420_SFLUSHRX);
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FASTSPI_STROBE(CC2420_SFLUSHRX);
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}
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@ -483,13 +501,14 @@ PROCESS_THREAD(simple_cc2420_process, ev, data)
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int
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simple_cc2420_read(void *buf, unsigned short bufsize)
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{
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u8_t footer[2];
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uint8_t footer[2];
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int len;
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struct timestamp t;
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if(!packet_seen) {
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if(packet_seen == 0) {
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return 0;
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}
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packet_seen = 0;
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if(interrupt_time_set) {
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#if SIMPLE_CC2420_CONF_TIMESTAMPS
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@ -505,10 +524,11 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
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FASTSPI_READ_FIFO_BYTE(len);
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if(len > SIMPLE_CC2420_MAX_PACKET_LEN) {
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uint8_t dummy;
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/* Oops, we must be out of sync. */
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FASTSPI_READ_FIFO_BYTE(dummy);
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FASTSPI_STROBE(CC2420_SFLUSHRX);
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FASTSPI_STROBE(CC2420_SFLUSHRX);
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packet_seen = 0;
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RIMESTATS_ADD(badsynch);
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RELEASE_LOCK();
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return 0;
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@ -532,7 +552,6 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
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len = TIMESTAMP_LEN + FOOTER_LEN;
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RIMESTATS_ADD(toolong);
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} else {
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FASTSPI_READ_FIFO_NO_WAIT(buf, len - FOOTER_LEN - TIMESTAMP_LEN);
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/* PRINTF("simple_cc2420_read: data\n");*/
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FASTSPI_READ_FIFO_NO_WAIT(&t, TIMESTAMP_LEN); /* Time stamp */
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@ -562,20 +581,15 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
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* length frame and is signaled by FIFOP = 1 and FIFO = 0.
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*/
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if(FIFOP_IS_1 && !FIFO_IS_1) {
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PRINTF("simple_cc2420_read: FIFOP_IS_1 1\n");
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uint8_t dummy;
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/* printf("simple_cc2420_read: FIFOP_IS_1 1\n");*/
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FASTSPI_READ_FIFO_BYTE(dummy);
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strobe(CC2420_SFLUSHRX);
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strobe(CC2420_SFLUSHRX);
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}
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if(FIFOP_IS_1) {
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PRINTF("simple_cc2420_read: FIFOP_IS_1 2\n");
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/* strobe(CC2420_SFLUSHRX);
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strobe(CC2420_SFLUSHRX);*/
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} else if(FIFOP_IS_1) {
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/* Another packet has been received and needs attention. */
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process_poll(&simple_cc2420_process);
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packet_seen = 1;
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} else {
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packet_seen = 0;
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}
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RELEASE_LOCK();
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@ -588,9 +602,9 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
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}
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/*---------------------------------------------------------------------------*/
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void
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simple_cc2420_set_txpower(u8_t power)
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simple_cc2420_set_txpower(uint8_t power)
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{
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u16_t reg;
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uint16_t reg;
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GET_LOCK();
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reg = getreg(CC2420_TXCTRL);
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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: simple-cc2420.h,v 1.8 2008/01/15 08:53:52 nvt-se Exp $
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* $Id: simple-cc2420.h,v 1.9 2008/01/23 14:57:19 adamdunkels Exp $
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*/
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/**
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@ -49,14 +49,14 @@ void simple_cc2420_init(void);
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#define SIMPLE_CC2420_MAX_PACKET_LEN 127
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void simple_cc2420_set_channel(int channel);
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int simple_cc2420_get_channel(void);
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void simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
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unsigned pan,
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unsigned addr,
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const u8_t *ieee_addr);
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void simple_cc2420_set_pan_addr(unsigned pan,
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unsigned addr,
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const uint8_t *ieee_addr);
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extern signed char simple_cc2420_last_rssi;
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extern u8_t simple_cc2420_last_correlation;
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extern uint8_t simple_cc2420_last_correlation;
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int simple_cc2420_rssi(void);
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@ -65,7 +65,7 @@ extern const struct radio_driver simple_cc2420_driver;
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/**
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* \param power Between 1 and 31.
|
||||
*/
|
||||
void simple_cc2420_set_txpower(u8_t power);
|
||||
void simple_cc2420_set_txpower(uint8_t power);
|
||||
int simple_cc2420_get_txpower(void);
|
||||
#define SIMPLE_CC2420_TXPOWER_MAX 31
|
||||
#define SIMPLE_CC2420_TXPOWER_MIN 0
|
||||
|
||||
Loading…
Reference in New Issue
Block a user