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Detect if the medium is busy right before sending.

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nvt-se 2007-11-12 21:17:47 +00:00
parent f192211444
commit c90a758ac5
1 changed files with 4 additions and 1 deletions
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5
platform/msb430/dev/cc1020.c
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@ -420,7 +420,10 @@ PROCESS_THREAD(cc1020_sender_process, ev, data)
// Wait until the receiver is idle. // Wait until the receiver is idle.
PROCESS_WAIT_UNTIL(cc1020_rxstate == CC1020_RX_SEARCHING); PROCESS_WAIT_UNTIL(cc1020_rxstate == CC1020_RX_SEARCHING);
// Wait for a short pseudo-random time before sending. // Wait for the medium to become idle.
while (cc1020_carrier_sense());
// Then wait for a short pseudo-random time before sending.
clock_delay(1 + 10 * (random_rand() & 0xff)); clock_delay(1 + 10 * (random_rand() & 0xff));
} }