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add send_on_cca if query

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This commit is contained in:
thomas-ha 2016-04-07 15:17:44 +02:00
parent a7b43de535
commit 9ac859a2af
1 changed files with 5 additions and 3 deletions
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2
cpu/cc2538/dev/cc2538-rf.c
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@ -607,10 +607,12 @@ transmit(unsigned short transmit_len)
while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + ONOFF_TIME));
}
if(send_on_cca) {
if(channel_clear() == CC2538_RF_CCA_BUSY) {
RIMESTATS_ADD(contentiondrop);
return RADIO_TX_COLLISION;
}
}
/*
* prepare() double checked that TX_ACTIVE is low. If SFD is high we are