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added clear channel assessment timeout. long to begin with.

This commit is contained in:
nvt-se 2007-12-20 14:44:31 +00:00
parent d8f6f03edc
commit f0891be218
2 changed files with 14 additions and 3 deletions
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5
platform/msb430/contiki-conf.h
View File

@ -24,14 +24,15 @@
#define CC_CONF_REGISTER_ARGS 1
#define CC_CONF_FUNCTION_POINTER_ARGS 1
#define CC_CONF_INLINE inline
#define CC_CONF_VA_ARGS 1
#define CCIF
#define CLIF
/* Clear channel assessment timeout for sending with the CC1020 radio. (ms) */
#define CC1020_CONF_CCA_TIMEOUT 50
// Clock
typedef unsigned short clock_time_t;
#define CLOCK_CONF_SECOND 100

12
platform/msb430/dev/cc1020.c
View File

@ -214,6 +214,8 @@ cc1020_set_power(uint8_t pa_power)
int
cc1020_send(const void *buf, unsigned short len)
{
int try;
if (cc1020_state == CC1020_OFF)
return -2;
@ -237,7 +239,15 @@ cc1020_send(const void *buf, unsigned short len)
// Wait for the medium to become idle.
if (cc1020_carrier_sense()) {
while (cc1020_carrier_sense());
for (try = 0; try < CC1020_CONF_CCA_TIMEOUT; try++) {
MS_DELAY(1);
if (!cc1020_carrier_sense()) {
break;
}
}
if (try == CC1020_CONF_CCA_TIMEOUT) {
return -3;
}
// Then wait for a short pseudo-random time before sending.
clock_delay(100 * ((random_rand() + 1) & 0xf));