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Moved the cc2420 driver into a separate dev/cc2420 module

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This commit is contained in:
Adam Dunkels 2013-11-28 14:04:34 +01:00
parent b78ab6753c
commit 0b805e4763
28 changed files with 30 additions and 30 deletions
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118
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/*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* AES encryption functions.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "cc2420.h"
#include "cc2420-aes.h"
#include "dev/spi.h"
#define KEYLEN 16
#define MAX_DATALEN 16
#define CC2420_WRITE_RAM_REV(buffer,adr,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE_FAST(0x80 | (adr & 0x7f)); \
SPI_WRITE_FAST((adr >> 1) & 0xc0); \
for(i = (count); i > 0; i--) { \
SPI_WRITE_FAST(((uint8_t*)(buffer))[i - 1]); \
} \
SPI_WAITFORTx_ENDED(); \
CC2420_SPI_DISABLE(); \
} while(0)
#define MIN(a,b) ((a) < (b)? (a): (b))
/*---------------------------------------------------------------------------*/
void
cc2420_aes_set_key(const uint8_t *key, int index)
{
switch(index) {
case 0:
CC2420_WRITE_RAM_REV(key, CC2420RAM_KEY0, KEYLEN);
break;
case 1:
CC2420_WRITE_RAM_REV(key, CC2420RAM_KEY1, KEYLEN);
break;
}
}
/*---------------------------------------------------------------------------*/
/* Encrypt at most 16 bytes of data. */
static void
cipher16(uint8_t *data, int len)
{
uint8_t status;
len = MIN(len, MAX_DATALEN);
CC2420_WRITE_RAM(data, CC2420RAM_SABUF, len);
CC2420_STROBE(CC2420_SAES);
/* Wait for the encryption to finish */
do {
CC2420_GET_STATUS(status);
} while(status & BV(CC2420_ENC_BUSY));
CC2420_READ_RAM(data, CC2420RAM_SABUF, len);
}
/*---------------------------------------------------------------------------*/
void
cc2420_aes_cipher(uint8_t *data, int len, int key_index)
{
int i;
uint16_t secctrl0;
CC2420_READ_REG(CC2420_SECCTRL0, secctrl0);
secctrl0 &= ~(CC2420_SECCTRL0_SAKEYSEL0 | CC2420_SECCTRL0_SAKEYSEL1);
switch(key_index) {
case 0:
secctrl0 |= CC2420_SECCTRL0_SAKEYSEL0;
break;
case 1:
secctrl0 |= CC2420_SECCTRL0_SAKEYSEL1;
break;
}
CC2420_WRITE_REG(CC2420_SECCTRL0, secctrl0);
for(i = 0; i < len; i = i + MAX_DATALEN) {
cipher16(data + i, MIN(len - i, MAX_DATALEN));
}
}
/*---------------------------------------------------------------------------*/

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/*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Interface to the CC2420 AES encryption/decryption functions
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef CC2420_AES_H_
#define CC2420_AES_H_
/**
* \brief Setup an AES key
* \param key A pointer to a 16-byte AES key
* \param index The key index: either 0 or 1.
*
* This function sets up an AES key with the CC2420
* chip. The AES key can later be used with the
* cc2420_aes_cipher() function to encrypt or decrypt
* data.
*
* The CC2420 can store two separate keys in its
* memory. The keys are indexed as 0 or 1 and the key
* index is given by the 'index' parameter.
*
*/
void cc2420_aes_set_key(const uint8_t *key, int index);
/**
* \brief Encrypt/decrypt data with AES
* \param data A pointer to the data to be encrypted/decrypted
* \param len The length of the data to be encrypted/decrypted
* \param key_index The key to use. The key must have previously been set up with cc2420_aes_set_key().
*
* This function encrypts/decrypts data with AES. A
* pointer to the data is passed as a parameter, and the
* function overwrites the data with the encrypted data.
*
*/
void cc2420_aes_cipher(uint8_t *data, int len, int key_index);
#endif /* CC2420_AES_H_ */

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/*
* Copyright (c) 2007, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/*
* This code is almost device independent and should be easy to port.
*/
#include <string.h>
#include "contiki.h"
#if defined(__AVR__)
#include <avr/io.h>
#endif
#include "dev/leds.h"
#include "dev/spi.h"
#include "cc2420.h"
#include "cc2420_const.h"
#include "net/packetbuf.h"
#include "net/rime/rimestats.h"
#include "net/netstack.h"
#define WITH_SEND_CCA 1
#define FOOTER_LEN 2
#ifndef CC2420_CONF_CHECKSUM
#define CC2420_CONF_CHECKSUM 0
#endif /* CC2420_CONF_CHECKSUM */
#ifndef CC2420_CONF_CHANNEL
#define CC2420_CONF_CHANNEL 26
#endif /* CC2420_CONF_CHANNEL */
#ifndef CC2420_CONF_CCA_THRESH
#define CC2420_CONF_CCA_THRESH -45
#endif /* CC2420_CONF_CCA_THRESH */
#ifndef CC2420_CONF_AUTOACK
#define CC2420_CONF_AUTOACK 0
#endif /* CC2420_CONF_AUTOACK */
#if CC2420_CONF_CHECKSUM
#include "lib/crc16.h"
#define CHECKSUM_LEN 2
#else
#define CHECKSUM_LEN 0
#endif /* CC2420_CONF_CHECKSUM */
#define AUX_LEN (CHECKSUM_LEN + FOOTER_LEN)
#define FOOTER1_CRC_OK 0x80
#define FOOTER1_CORRELATION 0x7f
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...) do {} while (0)
#endif
#define DEBUG_LEDS DEBUG
#undef LEDS_ON
#undef LEDS_OFF
#if DEBUG_LEDS
#define LEDS_ON(x) leds_on(x)
#define LEDS_OFF(x) leds_off(x)
#else
#define LEDS_ON(x)
#define LEDS_OFF(x)
#endif
void cc2420_arch_init(void);
/* XXX hack: these will be made as Chameleon packet attributes */
rtimer_clock_t cc2420_time_of_arrival, cc2420_time_of_departure;
int cc2420_authority_level_of_sender;
int cc2420_packets_seen, cc2420_packets_read;
static uint8_t volatile pending;
#define BUSYWAIT_UNTIL(cond, max_time) \
do { \
rtimer_clock_t t0; \
t0 = RTIMER_NOW(); \
while(!(cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + (max_time))); \
} while(0)
volatile uint8_t cc2420_sfd_counter;
volatile uint16_t cc2420_sfd_start_time;
volatile uint16_t cc2420_sfd_end_time;
static volatile uint16_t last_packet_timestamp;
/*---------------------------------------------------------------------------*/
PROCESS(cc2420_process, "CC2420 driver");
/*---------------------------------------------------------------------------*/
int cc2420_on(void);
int cc2420_off(void);
static int cc2420_read(void *buf, unsigned short bufsize);
static int cc2420_prepare(const void *data, unsigned short len);
static int cc2420_transmit(unsigned short len);
static int cc2420_send(const void *data, unsigned short len);
static int cc2420_receiving_packet(void);
static int pending_packet(void);
static int cc2420_cca(void);
/*static int detected_energy(void);*/
signed char cc2420_last_rssi;
uint8_t cc2420_last_correlation;
const struct radio_driver cc2420_driver =
{
cc2420_init,
cc2420_prepare,
cc2420_transmit,
cc2420_send,
cc2420_read,
/* cc2420_set_channel, */
/* detected_energy, */
cc2420_cca,
cc2420_receiving_packet,
pending_packet,
cc2420_on,
cc2420_off,
};
static uint8_t receive_on;
static int channel;
/*---------------------------------------------------------------------------*/
static void
getrxdata(void *buf, int len)
{
CC2420_READ_FIFO_BUF(buf, len);
}
static void
getrxbyte(uint8_t *byte)
{
CC2420_READ_FIFO_BYTE(*byte);
}
static void
flushrx(void)
{
uint8_t dummy;
CC2420_READ_FIFO_BYTE(dummy);
CC2420_STROBE(CC2420_SFLUSHRX);
CC2420_STROBE(CC2420_SFLUSHRX);
}
/*---------------------------------------------------------------------------*/
static void
strobe(enum cc2420_register regname)
{
CC2420_STROBE(regname);
}
/*---------------------------------------------------------------------------*/
static unsigned int
status(void)
{
uint8_t status;
CC2420_GET_STATUS(status);
return status;
}
/*---------------------------------------------------------------------------*/
static uint8_t locked, lock_on, lock_off;
static void
on(void)
{
CC2420_ENABLE_FIFOP_INT();
strobe(CC2420_SRXON);
BUSYWAIT_UNTIL(status() & (BV(CC2420_XOSC16M_STABLE)), RTIMER_SECOND / 100);
ENERGEST_ON(ENERGEST_TYPE_LISTEN);
receive_on = 1;
}
static void
off(void)
{
/* PRINTF("off\n");*/
receive_on = 0;
/* Wait for transmission to end before turning radio off. */
BUSYWAIT_UNTIL(!(status() & BV(CC2420_TX_ACTIVE)), RTIMER_SECOND / 10);
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
strobe(CC2420_SRFOFF);
CC2420_DISABLE_FIFOP_INT();
if(!CC2420_FIFOP_IS_1) {
flushrx();
}
}
/*---------------------------------------------------------------------------*/
#define GET_LOCK() locked++
static void RELEASE_LOCK(void) {
if(locked == 1) {
if(lock_on) {
on();
lock_on = 0;
}
if(lock_off) {
off();
lock_off = 0;
}
}
locked--;
}
/*---------------------------------------------------------------------------*/
static unsigned
getreg(enum cc2420_register regname)
{
unsigned reg;
CC2420_READ_REG(regname, reg);
return reg;
}
/*---------------------------------------------------------------------------*/
static void
setreg(enum cc2420_register regname, unsigned value)
{
CC2420_WRITE_REG(regname, value);
}
/*---------------------------------------------------------------------------*/
static void
set_txpower(uint8_t power)
{
uint16_t reg;
reg = getreg(CC2420_TXCTRL);
reg = (reg & 0xffe0) | (power & 0x1f);
setreg(CC2420_TXCTRL, reg);
}
/*---------------------------------------------------------------------------*/
#define AUTOACK (1 << 4)
#define ADR_DECODE (1 << 11)
#define RXFIFO_PROTECTION (1 << 9)
#define CORR_THR(n) (((n) & 0x1f) << 6)
#define FIFOP_THR(n) ((n) & 0x7f)
#define RXBPF_LOCUR (1 << 13);
/*---------------------------------------------------------------------------*/
int
cc2420_init(void)
{
uint16_t reg;
{
int s = splhigh();
cc2420_arch_init(); /* Initalize ports and SPI. */
CC2420_DISABLE_FIFOP_INT();
CC2420_FIFOP_INT_INIT();
splx(s);
}
/* Turn on voltage regulator and reset. */
SET_VREG_ACTIVE();
clock_delay(250);
SET_RESET_ACTIVE();
clock_delay(127);
SET_RESET_INACTIVE();
clock_delay(125);
/* Turn on the crystal oscillator. */
strobe(CC2420_SXOSCON);
/* Turn on/off automatic packet acknowledgment and address decoding. */
reg = getreg(CC2420_MDMCTRL0);
#if CC2420_CONF_AUTOACK
reg |= AUTOACK | ADR_DECODE;
#else
reg &= ~(AUTOACK | ADR_DECODE);
#endif /* CC2420_CONF_AUTOACK */
setreg(CC2420_MDMCTRL0, reg);
/* Set transmission turnaround time to the lower setting (8 symbols
= 0.128 ms) instead of the default (12 symbols = 0.192 ms). */
/* reg = getreg(CC2420_TXCTRL);
reg &= ~(1 << 13);
setreg(CC2420_TXCTRL, reg);*/
/* Change default values as recomended in the data sheet, */
/* correlation threshold = 20, RX bandpass filter = 1.3uA. */
setreg(CC2420_MDMCTRL1, CORR_THR(20));
reg = getreg(CC2420_RXCTRL1);
reg |= RXBPF_LOCUR;
setreg(CC2420_RXCTRL1, reg);
/* Set the FIFOP threshold to maximum. */
setreg(CC2420_IOCFG0, FIFOP_THR(127));
/* Turn off "Security enable" (page 32). */
reg = getreg(CC2420_SECCTRL0);
reg &= ~RXFIFO_PROTECTION;
setreg(CC2420_SECCTRL0, reg);
cc2420_set_pan_addr(0xffff, 0x0000, NULL);
cc2420_set_channel(CC2420_CONF_CHANNEL);
cc2420_set_cca_threshold(CC2420_CONF_CCA_THRESH);
flushrx();
process_start(&cc2420_process, NULL);
return 1;
}
/*---------------------------------------------------------------------------*/
static int
cc2420_transmit(unsigned short payload_len)
{
int i, txpower;
uint8_t total_len;
#if CC2420_CONF_CHECKSUM
uint16_t checksum;
#endif /* CC2420_CONF_CHECKSUM */
GET_LOCK();
txpower = 0;
if(packetbuf_attr(PACKETBUF_ATTR_RADIO_TXPOWER) > 0) {
/* Remember the current transmission power */
txpower = cc2420_get_txpower();
/* Set the specified transmission power */
set_txpower(packetbuf_attr(PACKETBUF_ATTR_RADIO_TXPOWER) - 1);
}
total_len = payload_len + AUX_LEN;
/* 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.
*
* Note that we may have to wait up to 320 us (20 symbols) before
* transmission starts.
*/
#ifndef CC2420_CONF_SYMBOL_LOOP_COUNT
#error CC2420_CONF_SYMBOL_LOOP_COUNT needs to be set!!!
#else
#define LOOP_20_SYMBOLS CC2420_CONF_SYMBOL_LOOP_COUNT
#endif
#if WITH_SEND_CCA
strobe(CC2420_SRXON);
BUSYWAIT_UNTIL(status() & BV(CC2420_RSSI_VALID), RTIMER_SECOND / 10);
strobe(CC2420_STXONCCA);
#else /* WITH_SEND_CCA */
strobe(CC2420_STXON);
#endif /* WITH_SEND_CCA */
for(i = LOOP_20_SYMBOLS; i > 0; i--) {
if(CC2420_SFD_IS_1) {
{
rtimer_clock_t sfd_timestamp;
sfd_timestamp = cc2420_sfd_start_time;
if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
PACKETBUF_ATTR_PACKET_TYPE_TIMESTAMP) {
/* Write timestamp to last two bytes of packet in TXFIFO. */
CC2420_WRITE_RAM(&sfd_timestamp, CC2420RAM_TXFIFO + payload_len - 1, 2);
}
}
if(!(status() & BV(CC2420_TX_ACTIVE))) {
/* SFD went high but we are not transmitting. This means that
we just started receiving a packet, so we drop the
transmission. */
RELEASE_LOCK();
return RADIO_TX_COLLISION;
}
if(receive_on) {
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
}
ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
/* We wait until transmission has ended so that we get an
accurate measurement of the transmission time.*/
BUSYWAIT_UNTIL(!(status() & BV(CC2420_TX_ACTIVE)), RTIMER_SECOND / 10);
#ifdef ENERGEST_CONF_LEVELDEVICE_LEVELS
ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,cc2420_get_txpower());
#endif
ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
if(receive_on) {
ENERGEST_ON(ENERGEST_TYPE_LISTEN);
} else {
/* We need to explicitly turn off the radio,
* since STXON[CCA] -> TX_ACTIVE -> RX_ACTIVE */
off();
}
if(packetbuf_attr(PACKETBUF_ATTR_RADIO_TXPOWER) > 0) {
/* Restore the transmission power */
set_txpower(txpower & 0xff);
}
RELEASE_LOCK();
return RADIO_TX_OK;
}
}
/* 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("cc2420: do_send() transmission never started\n");
if(packetbuf_attr(PACKETBUF_ATTR_RADIO_TXPOWER) > 0) {
/* Restore the transmission power */
set_txpower(txpower & 0xff);
}
RELEASE_LOCK();
return RADIO_TX_COLLISION;
}
/*---------------------------------------------------------------------------*/
static int
cc2420_prepare(const void *payload, unsigned short payload_len)
{
uint8_t total_len;
#if CC2420_CONF_CHECKSUM
uint16_t checksum;
#endif /* CC2420_CONF_CHECKSUM */
GET_LOCK();
PRINTF("cc2420: sending %d bytes\n", payload_len);
RIMESTATS_ADD(lltx);
/* Wait for any previous transmission to finish. */
/* while(status() & BV(CC2420_TX_ACTIVE));*/
/* Write packet to TX FIFO. */
strobe(CC2420_SFLUSHTX);
#if CC2420_CONF_CHECKSUM
checksum = crc16_data(payload, payload_len, 0);
#endif /* CC2420_CONF_CHECKSUM */
total_len = payload_len + AUX_LEN;
CC2420_WRITE_FIFO_BUF(&total_len, 1);
CC2420_WRITE_FIFO_BUF(payload, payload_len);
#if CC2420_CONF_CHECKSUM
CC2420_WRITE_FIFO_BUF(&checksum, CHECKSUM_LEN);
#endif /* CC2420_CONF_CHECKSUM */
RELEASE_LOCK();
return 0;
}
/*---------------------------------------------------------------------------*/
static int
cc2420_send(const void *payload, unsigned short payload_len)
{
cc2420_prepare(payload, payload_len);
return cc2420_transmit(payload_len);
}
/*---------------------------------------------------------------------------*/
int
cc2420_off(void)
{
/* Don't do anything if we are already turned off. */
if(receive_on == 0) {
return 1;
}
/* If we are called when the driver is locked, we indicate that the
radio should be turned off when the lock is unlocked. */
if(locked) {
/* printf("Off when locked (%d)\n", locked);*/
lock_off = 1;
return 1;
}
GET_LOCK();
/* If we are currently receiving a packet (indicated by SFD == 1),
we don't actually switch the radio off now, but signal that the
driver should switch off the radio once the packet has been
received and processed, by setting the 'lock_off' variable. */
if(status() & BV(CC2420_TX_ACTIVE)) {
lock_off = 1;
} else {
off();
}
RELEASE_LOCK();
return 1;
}
/*---------------------------------------------------------------------------*/
int
cc2420_on(void)
{
if(receive_on) {
return 1;
}
if(locked) {
lock_on = 1;
return 1;
}
GET_LOCK();
on();
RELEASE_LOCK();
return 1;
}
/*---------------------------------------------------------------------------*/
int
cc2420_get_channel(void)
{
return channel;
}
/*---------------------------------------------------------------------------*/
int
cc2420_set_channel(int c)
{
uint16_t f;
GET_LOCK();
/*
* Subtract the base channel (11), multiply by 5, which is the
* channel spacing. 357 is 2405-2048 and 0x4000 is LOCK_THR = 1.
*/
channel = c;
f = 5 * (c - 11) + 357 + 0x4000;
/*
* Writing RAM requires crystal oscillator to be stable.
*/
BUSYWAIT_UNTIL((status() & (BV(CC2420_XOSC16M_STABLE))), RTIMER_SECOND / 10);
/* Wait for any transmission to end. */
BUSYWAIT_UNTIL(!(status() & BV(CC2420_TX_ACTIVE)), RTIMER_SECOND / 10);
setreg(CC2420_FSCTRL, f);
/* If we are in receive mode, we issue an SRXON command to ensure
that the VCO is calibrated. */
if(receive_on) {
strobe(CC2420_SRXON);
}
RELEASE_LOCK();
return 1;
}
/*---------------------------------------------------------------------------*/
void
cc2420_set_pan_addr(unsigned pan,
unsigned addr,
const uint8_t *ieee_addr)
{
uint16_t f = 0;
uint8_t tmp[2];
GET_LOCK();
/*
* Writing RAM requires crystal oscillator to be stable.
*/
BUSYWAIT_UNTIL(status() & (BV(CC2420_XOSC16M_STABLE)), RTIMER_SECOND / 10);
tmp[0] = pan & 0xff;
tmp[1] = pan >> 8;
CC2420_WRITE_RAM(&tmp, CC2420RAM_PANID, 2);
tmp[0] = addr & 0xff;
tmp[1] = addr >> 8;
CC2420_WRITE_RAM(&tmp, CC2420RAM_SHORTADDR, 2);
if(ieee_addr != NULL) {
uint8_t tmp_addr[8];
/* LSB first, MSB last for 802.15.4 addresses in CC2420 */
for (f = 0; f < 8; f++) {
tmp_addr[7 - f] = ieee_addr[f];
}
CC2420_WRITE_RAM(tmp_addr, CC2420RAM_IEEEADDR, 8);
}
RELEASE_LOCK();
}
/*---------------------------------------------------------------------------*/
/*
* Interrupt leaves frame intact in FIFO.
*/
int
cc2420_interrupt(void)
{
CC2420_CLEAR_FIFOP_INT();
process_poll(&cc2420_process);
last_packet_timestamp = cc2420_sfd_start_time;
pending++;
cc2420_packets_seen++;
return 1;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(cc2420_process, ev, data)
{
int len;
PROCESS_BEGIN();
PRINTF("cc2420_process: started\n");
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
PRINTF("cc2420_process: calling receiver callback\n");
packetbuf_clear();
packetbuf_set_attr(PACKETBUF_ATTR_TIMESTAMP, last_packet_timestamp);
len = cc2420_read(packetbuf_dataptr(), PACKETBUF_SIZE);
packetbuf_set_datalen(len);
NETSTACK_RDC.input();
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static int
cc2420_read(void *buf, unsigned short bufsize)
{
uint8_t footer[2];
uint8_t len;
#if CC2420_CONF_CHECKSUM
uint16_t checksum;
#endif /* CC2420_CONF_CHECKSUM */
if(!CC2420_FIFOP_IS_1) {
return 0;
}
/* if(!pending) {
return 0;
}*/
pending = 0;
GET_LOCK();
cc2420_packets_read++;
getrxbyte(&len);
if(len > CC2420_MAX_PACKET_LEN) {
/* Oops, we must be out of sync. */
flushrx();
RIMESTATS_ADD(badsynch);
RELEASE_LOCK();
return 0;
}
if(len <= AUX_LEN) {
flushrx();
RIMESTATS_ADD(tooshort);
RELEASE_LOCK();
return 0;
}
if(len - AUX_LEN > bufsize) {
flushrx();
RIMESTATS_ADD(toolong);
RELEASE_LOCK();
return 0;
}
getrxdata(buf, len - AUX_LEN);
#if CC2420_CONF_CHECKSUM
getrxdata(&checksum, CHECKSUM_LEN);
#endif /* CC2420_CONF_CHECKSUM */
getrxdata(footer, FOOTER_LEN);
#if CC2420_CONF_CHECKSUM
if(checksum != crc16_data(buf, len - AUX_LEN, 0)) {
PRINTF("checksum failed 0x%04x != 0x%04x\n",
checksum, crc16_data(buf, len - AUX_LEN, 0));
}
if(footer[1] & FOOTER1_CRC_OK &&
checksum == crc16_data(buf, len - AUX_LEN, 0)) {
#else
if(footer[1] & FOOTER1_CRC_OK) {
#endif /* CC2420_CONF_CHECKSUM */
cc2420_last_rssi = footer[0];
cc2420_last_correlation = footer[1] & FOOTER1_CORRELATION;
packetbuf_set_attr(PACKETBUF_ATTR_RSSI, cc2420_last_rssi);
packetbuf_set_attr(PACKETBUF_ATTR_LINK_QUALITY, cc2420_last_correlation);
RIMESTATS_ADD(llrx);
} else {
RIMESTATS_ADD(badcrc);
len = AUX_LEN;
}
if(CC2420_FIFOP_IS_1) {
if(!CC2420_FIFO_IS_1) {
/* Clean up in case of FIFO overflow! This happens for every
* full length frame and is signaled by FIFOP = 1 and FIFO =
* 0. */
flushrx();
} else {
/* Another packet has been received and needs attention. */
process_poll(&cc2420_process);
}
}
RELEASE_LOCK();
if(len < AUX_LEN) {
return 0;
}
return len - AUX_LEN;
}
/*---------------------------------------------------------------------------*/
void
cc2420_set_txpower(uint8_t power)
{
GET_LOCK();
set_txpower(power);
RELEASE_LOCK();
}
/*---------------------------------------------------------------------------*/
int
cc2420_get_txpower(void)
{
int power;
GET_LOCK();
power = (int)(getreg(CC2420_TXCTRL) & 0x001f);
RELEASE_LOCK();
return power;
}
/*---------------------------------------------------------------------------*/
int
cc2420_rssi(void)
{
int rssi;
int radio_was_off = 0;
if(locked) {
return 0;
}
GET_LOCK();
if(!receive_on) {
radio_was_off = 1;
cc2420_on();
}
BUSYWAIT_UNTIL(status() & BV(CC2420_RSSI_VALID), RTIMER_SECOND / 100);
rssi = (int)((signed char)getreg(CC2420_RSSI));
if(radio_was_off) {
cc2420_off();
}
RELEASE_LOCK();
return rssi;
}
/*---------------------------------------------------------------------------*/
/*
static int
detected_energy(void)
{
return cc2420_rssi();
}
*/
/*---------------------------------------------------------------------------*/
int
cc2420_cca_valid(void)
{
int valid;
if(locked) {
return 1;
}
GET_LOCK();
valid = !!(status() & BV(CC2420_RSSI_VALID));
RELEASE_LOCK();
return valid;
}
/*---------------------------------------------------------------------------*/
static int
cc2420_cca(void)
{
int cca;
int radio_was_off = 0;
/* If the radio is locked by an underlying thread (because we are
being invoked through an interrupt), we preted that the coast is
clear (i.e., no packet is currently being transmitted by a
neighbor). */
if(locked) {
return 1;
}
GET_LOCK();
if(!receive_on) {
radio_was_off = 1;
cc2420_on();
}
/* Make sure that the radio really got turned on. */
if(!receive_on) {
RELEASE_LOCK();
if(radio_was_off) {
cc2420_off();
}
return 1;
}
BUSYWAIT_UNTIL(status() & BV(CC2420_RSSI_VALID), RTIMER_SECOND / 100);
cca = CC2420_CCA_IS_1;
if(radio_was_off) {
cc2420_off();
}
RELEASE_LOCK();
return cca;
}
/*---------------------------------------------------------------------------*/
int
cc2420_receiving_packet(void)
{
return CC2420_SFD_IS_1;
}
/*---------------------------------------------------------------------------*/
static int
pending_packet(void)
{
return CC2420_FIFOP_IS_1;
}
/*---------------------------------------------------------------------------*/
void
cc2420_set_cca_threshold(int value)
{
uint16_t shifted = value << 8;
GET_LOCK();
setreg(CC2420_RSSI, shifted);
RELEASE_LOCK();
}
/*---------------------------------------------------------------------------*/

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/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* CC2420 driver header file
* \author
* Adam Dunkels <adam@sics.se>
* Joakim Eriksson <joakime@sics.se>
*/
#ifndef CC2420_H_
#define CC2420_H_
#include "contiki.h"
#include "dev/spi.h"
#include "dev/radio.h"
#include "cc2420_const.h"
int cc2420_init(void);
#define CC2420_MAX_PACKET_LEN 127
int cc2420_set_channel(int channel);
int cc2420_get_channel(void);
void cc2420_set_pan_addr(unsigned pan,
unsigned addr,
const uint8_t *ieee_addr);
extern signed char cc2420_last_rssi;
extern uint8_t cc2420_last_correlation;
int cc2420_rssi(void);
extern const struct radio_driver cc2420_driver;
/**
* \param power Between 1 and 31.
*/
void cc2420_set_txpower(uint8_t power);
int cc2420_get_txpower(void);
#define CC2420_TXPOWER_MAX 31
#define CC2420_TXPOWER_MIN 0
/**
* Interrupt function, called from the simple-cc2420-arch driver.
*
*/
int cc2420_interrupt(void);
/* XXX hack: these will be made as Chameleon packet attributes */
extern rtimer_clock_t cc2420_time_of_arrival,
cc2420_time_of_departure;
extern int cc2420_authority_level_of_sender;
int cc2420_on(void);
int cc2420_off(void);
void cc2420_set_cca_threshold(int value);
/************************************************************************/
/* Additional SPI Macros for the CC2420 */
/************************************************************************/
/* Send a strobe to the CC2420 */
#define CC2420_STROBE(s) \
do { \
CC2420_SPI_ENABLE(); \
SPI_WRITE(s); \
CC2420_SPI_DISABLE(); \
} while (0)
/* Write to a register in the CC2420 */
/* Note: the SPI_WRITE(0) seems to be needed for getting the */
/* write reg working on the Z1 / MSP430X platform */
#define CC2420_WRITE_REG(adr,data) \
do { \
CC2420_SPI_ENABLE(); \
SPI_WRITE_FAST(adr); \
SPI_WRITE_FAST((uint8_t)((data) >> 8)); \
SPI_WRITE_FAST((uint8_t)(data & 0xff)); \
SPI_WAITFORTx_ENDED(); \
SPI_WRITE(0); \
CC2420_SPI_DISABLE(); \
} while(0)
/* Read a register in the CC2420 */
#define CC2420_READ_REG(adr,data) \
do { \
CC2420_SPI_ENABLE(); \
SPI_WRITE(adr | 0x40); \
data = (uint8_t)SPI_RXBUF; \
SPI_TXBUF = 0; \
SPI_WAITFOREORx(); \
data = SPI_RXBUF << 8; \
SPI_TXBUF = 0; \
SPI_WAITFOREORx(); \
data |= SPI_RXBUF; \
CC2420_SPI_DISABLE(); \
} while(0)
#define CC2420_READ_FIFO_BYTE(data) \
do { \
CC2420_SPI_ENABLE(); \
SPI_WRITE(CC2420_RXFIFO | 0x40); \
(void)SPI_RXBUF; \
SPI_READ(data); \
clock_delay(1); \
CC2420_SPI_DISABLE(); \
} while(0)
#define CC2420_READ_FIFO_BUF(buffer,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE(CC2420_RXFIFO | 0x40); \
(void)SPI_RXBUF; \
for(i = 0; i < (count); i++) { \
SPI_READ(((uint8_t *)(buffer))[i]); \
} \
clock_delay(1); \
CC2420_SPI_DISABLE(); \
} while(0)
#define CC2420_WRITE_FIFO_BUF(buffer,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE_FAST(CC2420_TXFIFO); \
for(i = 0; i < (count); i++) { \
SPI_WRITE_FAST(((uint8_t *)(buffer))[i]); \
} \
SPI_WAITFORTx_ENDED(); \
CC2420_SPI_DISABLE(); \
} while(0)
/* Write to RAM in the CC2420 */
#define CC2420_WRITE_RAM(buffer,adr,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE_FAST(0x80 | ((adr) & 0x7f)); \
SPI_WRITE_FAST(((adr) >> 1) & 0xc0); \
for(i = 0; i < (count); i++) { \
SPI_WRITE_FAST(((uint8_t*)(buffer))[i]); \
} \
SPI_WAITFORTx_ENDED(); \
CC2420_SPI_DISABLE(); \
} while(0)
/* Read from RAM in the CC2420 */
#define CC2420_READ_RAM(buffer,adr,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE(0x80 | ((adr) & 0x7f)); \
SPI_WRITE((((adr) >> 1) & 0xc0) | 0x20); \
SPI_RXBUF; \
for(i = 0; i < (count); i++) { \
SPI_READ(((uint8_t*)(buffer))[i]); \
} \
CC2420_SPI_DISABLE(); \
} while(0)
/* Read status of the CC2420 */
#define CC2420_GET_STATUS(s) \
do { \
CC2420_SPI_ENABLE(); \
SPI_WRITE(CC2420_SNOP); \
s = SPI_RXBUF; \
CC2420_SPI_DISABLE(); \
} while (0)
#endif /* CC2420_H_ */

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef CC2420_CONST_H
#define CC2420_CONST_H
/*
* All constants are from the Chipcon CC2420 Data Sheet that at one
* point in time could be found at
* http://www.chipcon.com/files/CC2420_Data_Sheet_1_4.pdf
*
* The page numbers below refer to pages in this document.
*/
/* Page 27. */
enum cc2420_status_byte {
CC2420_XOSC16M_STABLE = 6,
CC2420_TX_UNDERFLOW = 5,
CC2420_ENC_BUSY = 4,
CC2420_TX_ACTIVE = 3,
CC2420_LOCK = 2,
CC2420_RSSI_VALID = 1,
};
/* Page 27. */
enum cc2420_memory_size {
CC2420_RAM_SIZE = 368,
CC2420_FIFO_SIZE = 128,
};
/* Page 29. */
enum cc2420_address {
CC2420RAM_TXFIFO = 0x000,
CC2420RAM_RXFIFO = 0x080,
CC2420RAM_KEY0 = 0x100,
CC2420RAM_RXNONCE = 0x110,
CC2420RAM_SABUF = 0x120,
CC2420RAM_KEY1 = 0x130,
CC2420RAM_TXNONCE = 0x140,
CC2420RAM_CBCSTATE = 0x150,
CC2420RAM_IEEEADDR = 0x160,
CC2420RAM_PANID = 0x168,
CC2420RAM_SHORTADDR = 0x16A,
};
/* Page 60. */
enum cc2420_register {
CC2420_SNOP = 0x00,
CC2420_SXOSCON = 0x01,
CC2420_STXCAL = 0x02,
CC2420_SRXON = 0x03,
CC2420_STXON = 0x04,
CC2420_STXONCCA = 0x05,
CC2420_SRFOFF = 0x06,
CC2420_SXOSCOFF = 0x07,
CC2420_SFLUSHRX = 0x08,
CC2420_SFLUSHTX = 0x09,
CC2420_SACK = 0x0A,
CC2420_SACKPEND = 0x0B,
CC2420_SRXDEC = 0x0C,
CC2420_STXENC = 0x0D,
CC2420_SAES = 0x0E,
CC2420_foo = 0x0F,
CC2420_MAIN = 0x10,
CC2420_MDMCTRL0 = 0x11,
CC2420_MDMCTRL1 = 0x12,
CC2420_RSSI = 0x13,
CC2420_SYNCWORD = 0x14,
CC2420_TXCTRL = 0x15,
CC2420_RXCTRL0 = 0x16,
CC2420_RXCTRL1 = 0x17,
CC2420_FSCTRL = 0x18,
CC2420_SECCTRL0 = 0x19,
CC2420_SECCTRL1 = 0x1A,
CC2420_BATTMON = 0x1B,
CC2420_IOCFG0 = 0x1C,
CC2420_IOCFG1 = 0x1D,
CC2420_MANFIDL = 0x1E,
CC2420_MANFIDH = 0x1F,
CC2420_FSMTC = 0x20,
CC2420_MANAND = 0x21,
CC2420_MANOR = 0x22,
CC2420_AGCCTRL = 0x23,
CC2420_AGCTST0 = 0x24,
CC2420_AGCTST1 = 0x25,
CC2420_AGCTST2 = 0x26,
CC2420_FSTST0 = 0x27,
CC2420_FSTST1 = 0x28,
CC2420_FSTST2 = 0x29,
CC2420_FSTST3 = 0x2A,
CC2420_RXBPFTST = 0x2B,
CC2420_FSMSTATE = 0x2C,
CC2420_ADCTST = 0x2D,
CC2420_DACTST = 0x2E,
CC2420_TOPTST = 0x2F,
CC2420_RESERVED = 0x30,
/* 0x31 - 0x3D not used */
CC2420_TXFIFO = 0x3E,
CC2420_RXFIFO = 0x3F,
};
/* Page 69. */
enum cc2420_secctrl0 {
CC2420_SECCTRL0_NO_SECURITY = 0x0000,
CC2420_SECCTRL0_CBC_MAC = 0x0001,
CC2420_SECCTRL0_CTR = 0x0002,
CC2420_SECCTRL0_CCM = 0x0003,
CC2420_SECCTRL0_SEC_M_IDX = 2,
CC2420_SECCTRL0_RXKEYSEL0 = 0x0000,
CC2420_SECCTRL0_RXKEYSEL1 = 0x0020,
CC2420_SECCTRL0_TXKEYSEL0 = 0x0000,
CC2420_SECCTRL0_TXKEYSEL1 = 0x0040,
CC2420_SECCTRL0_SAKEYSEL0 = 0x0000,
CC2420_SECCTRL0_SAKEYSEL1 = 0x0080,
CC2420_SECCTRL0_SEC_CBC_HEAD = 0x0100,
CC2420_SECCTRL0_RXFIFO_PROTECTION = 0x0200,
};
#endif /* CC2420_CONST_H */