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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

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This commit is contained in:
adamdunkels 2008-01-23 14:57:19 +00:00
parent 10ce1ed03e
commit 2c5964ef55
2 changed files with 112 additions and 98 deletions
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174
core/dev/simple-cc2420.c
View File

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: simple-cc2420.c,v 1.24 2008/01/17 15:38:45 fros4943 Exp $
* @(#)$Id: simple-cc2420.c,v 1.25 2008/01/23 14:57:19 adamdunkels Exp $
*/
/*
* This code is almost device independent and should be easy to port.
@ -51,6 +51,9 @@
#include "net/rime/rimestats.h"
#include "sys/timetable.h"
#define WITH_SEND_CCA 0
#define FOOTER_LEN 2
#define CRC_LEN 2
@ -106,7 +109,7 @@ void simple_cc2420_set_receiver(void (* recv)(const struct radio_driver *d));
signed char simple_cc2420_last_rssi;
u8_t simple_cc2420_last_correlation;
uint8_t simple_cc2420_last_correlation;
const struct radio_driver simple_cc2420_driver =
{
@ -117,9 +120,12 @@ const struct radio_driver simple_cc2420_driver =
simple_cc2420_off,
};
static u8_t receive_on;
static uint8_t receive_on;
/* Radio stuff in network byte order. */
static u16_t pan_id;
static uint16_t pan_id;
static int channel;
/*---------------------------------------------------------------------------*/
static void
strobe(enum cc2420_register regname)
@ -130,7 +136,7 @@ strobe(enum cc2420_register regname)
static unsigned int
status(void)
{
u8_t status;
uint8_t status;
FASTSPI_UPD_STATUS(status);
return status;
}
@ -138,18 +144,21 @@ status(void)
static void
on(void)
{
uint8_t dummy;
ENERGEST_ON(ENERGEST_TYPE_LISTEN);
PRINTF("on\n");
receive_on = 1;
strobe(CC2420_SRXON);
FASTSPI_READ_FIFO_BYTE(dummy);
strobe(CC2420_SFLUSHRX);
strobe(CC2420_SFLUSHRX);
ENABLE_FIFOP_INT();
}
static void
off(void)
{
u8_t spiStatusByte;
uint8_t spiStatusByte;
PRINTF("off\n");
receive_on = 0;
@ -163,7 +172,7 @@ off(void)
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
}
/*---------------------------------------------------------------------------*/
static u8_t locked, lock_on, lock_off;
static uint8_t locked, lock_on, lock_off;
#define GET_LOCK() locked = 1
static void RELEASE_LOCK(void) {
if(lock_on) {
@ -207,7 +216,7 @@ simple_cc2420_set_receiver(void (* recv)(const struct radio_driver *))
void
simple_cc2420_init(void)
{
u16_t reg;
uint16_t reg;
{
int s = splhigh();
simple_cc2420_arch_init(); /* Initalize ports and SPI. */
@ -253,7 +262,8 @@ simple_cc2420_init(void)
reg &= ~RXFIFO_PROTECTION;
setreg(CC2420_SECCTRL0, reg);
simple_cc2420_set_chan_pan_addr(11, 0xffff, 0x0000, NULL);
simple_cc2420_set_pan_addr(0xffff, 0x0000, NULL);
simple_cc2420_set_channel(26);
process_start(&simple_cc2420_process, NULL);
}
@ -261,30 +271,17 @@ simple_cc2420_init(void)
int
simple_cc2420_send(const void *payload, unsigned short payload_len)
{
uint8_t spiStatusByte;
int i;
uint8_t total_len;
struct timestamp timestamp;
/* This code uses the CC2420 CCA (Clear Channel Assessment) to
* implement Carrier Sense Multiple Access with Collision Avoidance
* (CSMA-CA) and requires the receiver to be enabled and ready.
*/
if(!receive_on) {
return -2;
}
/* PRINTF("simple_cc2420_send: %d bytes\n", payload_len);*/
GET_LOCK();
RIMESTATS_ADD(lltx);
/* Wait for previous transmission to finish and RSSI. */
do {
spiStatusByte = status();
} while(spiStatusByte & BV(CC2420_TX_ACTIVE) ||
!(spiStatusByte & BV(CC2420_RSSI_VALID)));
/* Wait for any previous transmission to finish. */
while(status() & BV(CC2420_TX_ACTIVE));
/* Write packet to TX FIFO. */
strobe(CC2420_SFLUSHTX);
@ -300,14 +297,7 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
FASTSPI_WRITE_FIFO(&timestamp, TIMESTAMP_LEN);
#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
if(FIFOP_IS_1 && !FIFO_IS_1) {
/* RXFIFO overflow, send on retransmit. */
PRINTF("rxfifo overflow!\n");
RELEASE_LOCK();
return -4;
}
/* The TX FIFO can only hold one packet! Make sure to not overrun
/* The TX FIFO can only hold one packet. Make sure to not overrun
* FIFO by waiting for transmission to start here and synchronizing
* with the CC2420_TX_ACTIVE check in cc2420_send.
*
@ -319,17 +309,26 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
#elif __AVR__
#define LOOP_20_SYMBOLS 500 /* XXX */
#endif
#if WITH_SEND_CCA
strobe(CC2420_SRXON);
while(!(status() & BV(CC2420_RSSI_VALID)));
strobe(CC2420_STXONCCA);
#else /* WITH_SEND_CCA */
strobe(CC2420_STXON);
#endif /* WITH_SEND_CCA */
for(i = LOOP_20_SYMBOLS; i > 0; i--) {
if(SFD_IS_1) {
#if SIMPLE_CC2420_CONF_TIMESTAMPS
rtimer_clock_t txtime = timesynch_time();
/* PRINTF("simple_cc2420: do_send() transmission has started\n");*/
#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
do {
spiStatusByte = status();
} while(spiStatusByte & BV(CC2420_TX_ACTIVE));
while(status() & BV(CC2420_TX_ACTIVE));
#if SIMPLE_CC2420_CONF_TIMESTAMPS
setup_time_for_transmission = txtime - timestamp.time;
@ -340,6 +339,7 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
}
#endif /* SIMPLE_CC2420_CONF_TIMESTAMPS */
#ifdef ENERGEST_CONF_LEVELDEVICE_LEVELS
ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,simple_cc2420_get_txpower());
#endif
@ -350,13 +350,16 @@ simple_cc2420_send(const void *payload, unsigned short payload_len)
return 0; /* Transmission has started. */
}
}
/* If we are using WITH_SEND_CCA, we get here if the packet wasn't
transmitted because of other channel activity. */
RIMESTATS_ADD(contentiondrop);
PRINTF("simple_cc2420: do_send() transmission never started\n");
RELEASE_LOCK();
return -3; /* Transmission never started! */
}
/*---------------------------------------------------------------------------*/
static volatile u8_t packet_seen;
static volatile uint8_t packet_seen;
/*---------------------------------------------------------------------------*/
int
simple_cc2420_off(void)
@ -394,12 +397,24 @@ simple_cc2420_on(void)
return 1;
}
/*---------------------------------------------------------------------------*/
void
simple_cc2420_set_channel(int channel)
int
simple_cc2420_get_channel(void)
{
u16_t f = channel;
return channel;
}
/*---------------------------------------------------------------------------*/
void
simple_cc2420_set_channel(int c)
{
uint16_t f;
/*
* Subtract the base channel (11), multiply by 5, which is the
* channel spacing. 357 is 2405-2048 and 0x4000 is LOCK_THR = 1.
*/
f = 5 * (f - 11) + 357 + 0x4000;
channel = c;
f = 5 * (c - 11) + 357 + 0x4000;
/*
* Writing RAM requires crystal oscillator to be stable.
*/
@ -409,28 +424,17 @@ simple_cc2420_set_channel(int channel)
}
/*---------------------------------------------------------------------------*/
void
simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
unsigned pan,
simple_cc2420_set_pan_addr(unsigned pan,
unsigned addr,
const u8_t *ieee_addr)
const uint8_t *ieee_addr)
{
/*
* Subtract the base channel (11), multiply by 5, which is the
* channel spacing. 357 is 2405-2048 and 0x4000 is LOCK_THR = 1.
*/
u8_t spiStatusByte;
u16_t f = channel;
f = 5 * (f - 11) + 357 + 0x4000;
uint16_t f = 0;
/*
* Writing RAM requires crystal oscillator to be stable.
*/
do {
spiStatusByte = status();
} while(!(spiStatusByte & (BV(CC2420_XOSC16M_STABLE))));
while(!(status() & (BV(CC2420_XOSC16M_STABLE))));
pan_id = pan;
setreg(CC2420_FSCTRL, f);
FASTSPI_WRITE_RAM_LE(&pan, CC2420RAM_PANID, 2, f);
FASTSPI_WRITE_RAM_LE(&addr, CC2420RAM_SHORTADDR, 2, f);
if(ieee_addr != NULL) {
@ -439,14 +443,15 @@ simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
}
/*---------------------------------------------------------------------------*/
/*
* Interrupt either leaves frame intact in FIFO or reads *only* the
* MAC header and sets rx_fifo_remaining_bytes.
*
* In order to quickly empty the FIFO ack processing is done at
* interrupt priority rather than poll priority.
* Interrupt either leaves frame intact in FIFO.
*/
static volatile rtimer_clock_t interrupt_time;
static volatile int interrupt_time_set;
#if SIMPLE_CC2420_TIMETABLE_PROFILING
#define simple_cc2420_timetable_size 16
TIMETABLE(simple_cc2420_timetable);
TIMETABLE_AGGREGATE(aggregate_time, 10);
#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
int
simple_cc2420_interrupt(void)
{
@ -455,7 +460,11 @@ simple_cc2420_interrupt(void)
CLEAR_FIFOP_INT();
process_poll(&simple_cc2420_process);
packet_seen = 1;
packet_seen++;
#if SIMPLE_CC2420_TIMETABLE_PROFILING
timetable_clear(&simple_cc2420_timetable);
TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "interrupt");
#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
return 1;
}
/*---------------------------------------------------------------------------*/
@ -465,13 +474,22 @@ PROCESS_THREAD(simple_cc2420_process, ev, data)
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
/* printf("Diff %d\n", rtimer_arch_now() - interrupt_time);*/
#if SIMPLE_CC2420_TIMETABLE_PROFILING
TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "poll");
#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
if(receiver_callback != NULL) {
receiver_callback(&simple_cc2420_driver);
#if SIMPLE_CC2420_TIMETABLE_PROFILING
TIMETABLE_TIMESTAMP(simple_cc2420_timetable, "end");
timetable_aggregate_compute_detailed(&aggregate_time,
&simple_cc2420_timetable);
timetable_clear(&simple_cc2420_timetable);
#endif /* SIMPLE_CC2420_TIMETABLE_PROFILING */
} else {
uint8_t dummy;
PRINTF("simple_cc2420_process not receiving function\n");
FASTSPI_READ_FIFO_BYTE(dummy);
FASTSPI_STROBE(CC2420_SFLUSHRX);
FASTSPI_STROBE(CC2420_SFLUSHRX);
}
@ -483,13 +501,14 @@ PROCESS_THREAD(simple_cc2420_process, ev, data)
int
simple_cc2420_read(void *buf, unsigned short bufsize)
{
u8_t footer[2];
uint8_t footer[2];
int len;
struct timestamp t;
if(!packet_seen) {
if(packet_seen == 0) {
return 0;
}
packet_seen = 0;
if(interrupt_time_set) {
#if SIMPLE_CC2420_CONF_TIMESTAMPS
@ -505,10 +524,11 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
FASTSPI_READ_FIFO_BYTE(len);
if(len > SIMPLE_CC2420_MAX_PACKET_LEN) {
uint8_t dummy;
/* Oops, we must be out of sync. */
FASTSPI_READ_FIFO_BYTE(dummy);
FASTSPI_STROBE(CC2420_SFLUSHRX);
FASTSPI_STROBE(CC2420_SFLUSHRX);
packet_seen = 0;
RIMESTATS_ADD(badsynch);
RELEASE_LOCK();
return 0;
@ -532,7 +552,6 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
len = TIMESTAMP_LEN + FOOTER_LEN;
RIMESTATS_ADD(toolong);
} else {
FASTSPI_READ_FIFO_NO_WAIT(buf, len - FOOTER_LEN - TIMESTAMP_LEN);
/* PRINTF("simple_cc2420_read: data\n");*/
FASTSPI_READ_FIFO_NO_WAIT(&t, TIMESTAMP_LEN); /* Time stamp */
@ -562,20 +581,15 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
* length frame and is signaled by FIFOP = 1 and FIFO = 0.
*/
if(FIFOP_IS_1 && !FIFO_IS_1) {
PRINTF("simple_cc2420_read: FIFOP_IS_1 1\n");
uint8_t dummy;
/* printf("simple_cc2420_read: FIFOP_IS_1 1\n");*/
FASTSPI_READ_FIFO_BYTE(dummy);
strobe(CC2420_SFLUSHRX);
strobe(CC2420_SFLUSHRX);
}
if(FIFOP_IS_1) {
PRINTF("simple_cc2420_read: FIFOP_IS_1 2\n");
/* strobe(CC2420_SFLUSHRX);
strobe(CC2420_SFLUSHRX);*/
} else if(FIFOP_IS_1) {
/* Another packet has been received and needs attention. */
process_poll(&simple_cc2420_process);
packet_seen = 1;
} else {
packet_seen = 0;
}
RELEASE_LOCK();
@ -588,9 +602,9 @@ simple_cc2420_read(void *buf, unsigned short bufsize)
}
/*---------------------------------------------------------------------------*/
void
simple_cc2420_set_txpower(u8_t power)
simple_cc2420_set_txpower(uint8_t power)
{
u16_t reg;
uint16_t reg;
GET_LOCK();
reg = getreg(CC2420_TXCTRL);

12
core/dev/simple-cc2420.h
View File

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: simple-cc2420.h,v 1.8 2008/01/15 08:53:52 nvt-se Exp $
* $Id: simple-cc2420.h,v 1.9 2008/01/23 14:57:19 adamdunkels Exp $
*/
/**
@ -49,14 +49,14 @@ void simple_cc2420_init(void);
#define SIMPLE_CC2420_MAX_PACKET_LEN 127
void simple_cc2420_set_channel(int channel);
int simple_cc2420_get_channel(void);
void simple_cc2420_set_chan_pan_addr(unsigned channel, /* 11 - 26 */
unsigned pan,
void simple_cc2420_set_pan_addr(unsigned pan,
unsigned addr,
const u8_t *ieee_addr);
const uint8_t *ieee_addr);
extern signed char simple_cc2420_last_rssi;
extern u8_t simple_cc2420_last_correlation;
extern uint8_t simple_cc2420_last_correlation;
int simple_cc2420_rssi(void);
@ -65,7 +65,7 @@ extern const struct radio_driver simple_cc2420_driver;
/**
* \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