altos: Pre-compute RDF packet len at compile time

Instead of computing the RDF packet len at run time, which takes a
pile of code space.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 1 insertions, 13 deletions

diff --git a/src/cc1111/ao_radio.c b/src/cc1111/ao_radio.c
index 00816b33..75f241d4 100644
--- a/src/cc1111/ao_radio.c
+++ b/src/cc1111/ao_radio.c
@@ -367,21 +367,9 @@ ao_radio_recv_abort(void)
 __xdata ao_radio_rdf_value = 0x55;
 
 void
-ao_radio_rdf(int ms)
+ao_radio_rdf(uint8_t pkt_len)
 {
 	uint8_t i;
-	uint8_t pkt_len;
-
-	/*
-	 * 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;
 
 	ao_radio_abort = 0;
 	ao_radio_get(pkt_len);