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CC2420: Eliminated duplicated code in cc2420_read

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This commit is contained in:
kkrentz 2013-06-05 07:50:21 -07:00
parent e3eb924f13
commit e977da8fe2
1 changed files with 33 additions and 47 deletions
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80
dev/cc2420/cc2420.c
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@ -775,61 +775,47 @@ cc2420_read(void *buf, unsigned short bufsize)
if(len > CC2420_MAX_PACKET_LEN) {
/* Oops, we must be out of sync. */
flushrx();
RIMESTATS_ADD(badsynch);
RELEASE_LOCK();
return 0;
}
if(len <= FOOTER_LEN) {
flushrx();
} else if(len <= FOOTER_LEN) {
RIMESTATS_ADD(tooshort);
RELEASE_LOCK();
return 0;
}
if(len - FOOTER_LEN > bufsize) {
flushrx();
} else if(len - FOOTER_LEN > bufsize) {
RIMESTATS_ADD(toolong);
RELEASE_LOCK();
return 0;
}
getrxdata(buf, len - FOOTER_LEN);
getrxdata(footer, FOOTER_LEN);
if(footer[1] & FOOTER1_CRC_OK) {
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 = FOOTER_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();
getrxdata(buf, len - FOOTER_LEN);
getrxdata(footer, FOOTER_LEN);
if(footer[1] & FOOTER1_CRC_OK) {
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 {
/* Another packet has been received and needs attention. */
process_poll(&cc2420_process);
RIMESTATS_ADD(badcrc);
len = FOOTER_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();
return len - FOOTER_LEN;
}
flushrx();
RELEASE_LOCK();
if(len < FOOTER_LEN) {
return 0;
}
return len - FOOTER_LEN;
return 0;
}
/*---------------------------------------------------------------------------*/
void