RF_DEVIATN_OFF, ((RDF_DEVIATION_E << RF_DEVIATN_DEVIATION_E_SHIFT) |
(RDF_DEVIATION_M << RF_DEVIATN_DEVIATION_M_SHIFT)),
- /* packet length */
- RF_PKTLEN_OFF, RDF_PACKET_LEN,
+ /* packet length is set in-line */
RF_PKTCTRL1_OFF, ((1 << PKTCTRL1_PQT_SHIFT)|
PKTCTRL1_ADR_CHK_NONE),
RF_PKTCTRL0_OFF, (RF_PKTCTRL0_PKT_FORMAT_NORMAL|
__xdata ao_radio_rdf_value = 0x55;
void
-ao_radio_rdf(void)
+ao_radio_rdf(int ms)
{
uint8_t i;
+ uint8_t pkt_len;
ao_mutex_get(&ao_radio_mutex);
ao_radio_idle();
ao_radio_rdf_running = 1;
for (i = 0; i < sizeof (rdf_setup); i += 2)
RF[rdf_setup[i]] = rdf_setup[i+1];
+ /*
+ * Compute the packet length as follows:
+ *
+ * 2000 bps (for a 1kHz tone)
+ * so, for 'ms' milliseconds, we need
+ * 2 * ms bits, or ms / 4 bytes
+ */
+ if (ms > (255 * 4))
+ ms = 255 * 4;
+ pkt_len = ms >> 2;
+ RF[RF_PKTLEN_OFF] = pkt_len;
+
ao_dma_set_transfer(ao_radio_dma,
&ao_radio_rdf_value,
&RFDXADDR,
- RDF_PACKET_LEN,
+ pkt_len,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
DMA_CFG0_TRIGGER_RADIO,
ao_sleep(&ao_radio_dma_done);
ao_radio_rdf_running = 0;
ao_radio_idle();
- for (i = 0; i < sizeof (rdf_setup); i += 2)
+ for (i = 0; i < sizeof (telemetry_setup); i += 2)
RF[telemetry_setup[i]] = telemetry_setup[i+1];
ao_mutex_put(&ao_radio_mutex);
}