static void reset(void)
{
cc110x_wakeup_from_rx();
#ifdef MODULE_CC110x_SPI
cc110x_spi_select();
#endif
cc110x_strobe(CC1100_SRES);
hwtimer_wait(RTIMER_TICKS(100));
}
static bool send_burst(cc1100_packet_layer0_t *packet, uint8_t retries, uint8_t rtc)
{
int i;
radio_state = RADIO_SEND_BURST;
rflags.LL_ACK = false;
for (i = 1; i <= cc1100_burst_count; i++) {
/*
* Number of bytes to send is:
* length of phy payload (packet->length)
* + size of length field (1 byte)
*/
extern unsigned long hwtimer_now(void);
timer_tick_t t = hwtimer_now() + RTIMER_TICKS(T_PACKET_INTERVAL);
cc1100_send_raw((uint8_t *)packet, packet->length + 1); /* RX -> TX (9.6 us) */
cc1100_statistic.raw_packets_out++;
/* Delay until predefined "send" interval has passed */
timer_tick_t now = hwtimer_now();
if (t > now) {
hwtimer_wait(t - now);
}
/**
* After sending the packet the CC1100 goes automatically
* into RX mode (21.5 us) (listening for an ACK).
* Do not interrupt burst if send to broadcast address (a node may
* have the broadcast address at startup and would stop the burst
* by sending an ACK).
*/
if (rflags.LL_ACK && packet->address != CC1100_BROADCAST_ADDRESS) {
cc1100_statistic.raw_packets_out_acked += i;
break;
}
}
/* No link level ACK -> do retry if retry counter greater zero
* Note: Event broadcast packets can be sent repeatedly if in
* constant RX mode. In WOR mode it is not necessary, so
* set retry count to zero.*/
if (!rflags.LL_ACK && retries > 0) {
return send_burst(packet, retries - 1, rtc + 1);
}
/* Store number of transmission retries */
rflags.RETC = rtc;
rflags.RPS = rtc * cc1100_burst_count + i;
if (i > cc1100_burst_count) {
rflags.RPS--;
}
rflags.TX = false;
/* Go to mode after TX (CONST_RX -> RX, WOR -> WOR) */
cc1100_go_after_tx();
/* Burst from any other node is definitely over */
last_seq_num = 0;
if (packet->address != CC1100_BROADCAST_ADDRESS && !rflags.LL_ACK) {
return false;
}
return true;
}
