set an initial default channel --- otherwise the maca isr hogs the

CPU.

lib/maca.c

@@ -173,6 +173,7 @@ void maca_init(void) {
 	radio_init();
 	flyback_init();
 	init_phy();
+	set_channel(0); /* things get weird if you never set a channel */
 	free_head = 0; tx_head = 0; rx_head = 0; rx_end = 0; tx_end = 0; dma_tx = 0; dma_rx = 0;
 	free_all_packets();