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added configuration of checksum and timesynch

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This commit is contained in:
nifi 2009-02-25 21:21:06 +00:00
parent 703df7bb48
commit dee785ae88
1 changed files with 39 additions and 5 deletions
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44
core/dev/cc2420.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: cc2420.c,v 1.25 2008/08/26 21:44:03 adamdunkels Exp $
* @(#)$Id: cc2420.c,v 1.26 2009/02/25 21:21:06 nifi Exp $
*/
/*
* This code is almost device independent and should be easy to port.
@ -50,8 +50,6 @@
#include "dev/cc2420.h"
#include "dev/cc2420_const.h"
#include "lib/crc16.h"
#include "net/rime/rimestats.h"
#include "sys/timetable.h"
@ -66,7 +64,17 @@
#define TIMESTAMP_LEN 0
#endif /* CC2420_CONF_TIMESTAMPS */
#define FOOTER_LEN 2
#ifndef CC2420_CONF_CHECKSUM
#define CC2420_CONF_CHECKSUM 0
#endif /* CC2420_CONF_CHECKSUM */
#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 + TIMESTAMP_LEN + FOOTER_LEN)
@ -93,9 +101,11 @@ rtimer_clock_t cc2420_time_of_arrival, cc2420_time_of_departure;
int cc2420_authority_level_of_sender;
#if CC2420_CONF_TIMESTAMPS
static rtimer_clock_t setup_time_for_transmission;
static unsigned long total_time_for_transmission, total_transmission_len;
static int num_transmissions;
#endif /* CC2420_CONF_TIMESTAMPS */
/*---------------------------------------------------------------------------*/
PROCESS(cc2420_process, "CC2420 driver");
@ -298,8 +308,12 @@ cc2420_send(const void *payload, unsigned short payload_len)
{
int i;
uint8_t total_len;
#if CC2420_CONF_TIMESTAMPS
struct timestamp timestamp;
#endif /* CC2420_CONF_TIMESTAMPS */
#if CC2420_CONF_CHECKSUM
uint16_t checksum;
#endif /* CC2420_CONF_CHECKSUM */
GET_LOCK();
@ -313,11 +327,15 @@ cc2420_send(const void *payload, unsigned short payload_len)
/* 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;
FASTSPI_WRITE_FIFO(&total_len, 1);
FASTSPI_WRITE_FIFO(payload, payload_len);
#if CC2420_CONF_CHECKSUM
FASTSPI_WRITE_FIFO(&checksum, CHECKSUM_LEN);
#endif /* CC2420_CONF_CHECKSUM */
#if CC2420_CONF_TIMESTAMPS
timestamp.authority_level = timesynch_authority_level();
@ -494,8 +512,10 @@ cc2420_set_pan_addr(unsigned pan,
/*
* Interrupt leaves frame intact in FIFO.
*/
#if CC2420_CONF_TIMESTAMPS
static volatile rtimer_clock_t interrupt_time;
static volatile int interrupt_time_set;
#endif /* CC2420_CONF_TIMESTAMPS */
#if CC2420_TIMETABLE_PROFILING
#define cc2420_timetable_size 16
TIMETABLE(cc2420_timetable);
@ -504,8 +524,10 @@ TIMETABLE_AGGREGATE(aggregate_time, 10);
int
cc2420_interrupt(void)
{
#if CC2420_CONF_TIMESTAMPS
interrupt_time = timesynch_time();
interrupt_time_set = 1;
#endif /* CC2420_CONF_TIMESTAMPS */
CLEAR_FIFOP_INT();
process_poll(&cc2420_process);
@ -551,23 +573,27 @@ 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_CONF_TIMESTAMPS
struct timestamp t;
#endif /* CC2420_CONF_TIMESTAMPS */
if(!FIFOP_IS_1) {
/* If FIFOP is 0, there is no packet in the RXFIFO. */
return 0;
}
if(interrupt_time_set) {
#if CC2420_CONF_TIMESTAMPS
if(interrupt_time_set) {
cc2420_time_of_arrival = interrupt_time;
#endif /* CC2420_CONF_TIMESTAMPS */
interrupt_time_set = 0;
} else {
cc2420_time_of_arrival = 0;
}
cc2420_time_of_departure = 0;
#endif /* CC2420_CONF_TIMESTAMPS */
GET_LOCK();
getrxbyte(&len);
@ -595,12 +621,20 @@ cc2420_read(void *buf, unsigned short bufsize)
}
getrxdata(buf, len - AUX_LEN);
#if CC2420_CONF_CHECKSUM
getrxdata(&checksum, CHECKSUM_LEN);
#endif /* CC2420_CONF_CHECKSUM */
#if CC2420_CONF_TIMESTAMPS
getrxdata(&t, TIMESTAMP_LEN);
#endif /* CC2420_CONF_TIMESTAMPS */
getrxdata(footer, FOOTER_LEN);
#if CC2420_CONF_CHECKSUM
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;
RIMESTATS_ADD(llrx);