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Atmel 230bb: always increase the rx frame ringbuffer cursor in rf230_read().

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Avoids packet reordering in cases when RF230_CONF_RX_BUFFERS > 1.
This commit is contained in:
Atis Elsts 2014-12-17 12:42:27 +01:00
parent ddf970d3db
commit 854494109d
1 changed files with 15 additions and 13 deletions
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28
cpu/avr/radio/rf230bb/rf230bb.c
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@ -552,7 +552,19 @@ rf230_is_ready_to_send() {
static void
flushrx(void)
{
/* Clear the length field to allow buffering of the next packet */
rxframe[rxframe_head].length=0;
rxframe_head++;
if (rxframe_head >= RF230_CONF_RX_BUFFERS) {
rxframe_head=0;
}
/* If another packet has been buffered, schedule another receive poll */
if (rxframe[rxframe_head].length) {
rf230_interrupt();
}
else {
rf230_pending = 0;
}
}
/*---------------------------------------------------------------------------*/
static void
@ -1434,6 +1446,7 @@ rf230_read(void *buf, unsigned short bufsize)
#if RADIOALWAYSON && DEBUGFLOWSIZE
if (RF230_receive_on==0) {if (debugflow[debugflowsize-1]!='z') DEBUGFLOW('z');} //cxmac calls with radio off?
#endif
flushrx();
return 0;
}
@ -1476,19 +1489,8 @@ rf230_read(void *buf, unsigned short bufsize)
memcpy(buf,framep,len-AUX_LEN+CHECKSUM_LEN);
rf230_last_correlation = rxframe[rxframe_head].lqi;
/* Clear the length field to allow buffering of the next packet */
rxframe[rxframe_head].length=0;
rxframe_head++;
if (rxframe_head >= RF230_CONF_RX_BUFFERS) {
rxframe_head=0;
}
/* If another packet has been buffered, schedule another receive poll */
if (rxframe[rxframe_head].length) {
rf230_interrupt();
}
else {
rf230_pending = 0;
}
/* Prepare to receive another packet */
flushrx();
/* Point to the checksum */
framep+=len-AUX_LEN;