From: Keith Packard <keithp@keithp.com>
Date: Mon, 29 Apr 2013 06:05:18 +0000 (-0700)
Subject: altos: Clear any broken cc1120 TX fifo bits before transmitting
X-Git-Tag: 1.2.1~84
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=f09b2fc7fcfb1b3dcb1a46a8b9856092dd59866b

altos: Clear any broken cc1120 TX fifo bits before transmitting

This just goes and clears the transmitter before using it, just in
case it got wedged somehow. It also clears the bits while waiting for
the radio to go idle, otherwise it'd never make it.

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

diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c
index bad0c856..07ebf835 100644
--- a/src/drivers/ao_cc1120.c
+++ b/src/drivers/ao_cc1120.c
@@ -272,6 +272,8 @@ ao_radio_idle(void)
 		uint8_t	state = ao_radio_strobe(CC1120_SIDLE);
 		if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_IDLE)
 			break;
+		if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_TX_FIFO_ERROR)
+			ao_radio_strobe(CC1120_SFTX);
 	}
 	/* Flush any pending TX bytes */
 	ao_radio_strobe(CC1120_SFTX);
@@ -715,11 +717,17 @@ ao_radio_send(const void *d, uint8_t size)
 	uint8_t		this_len;
 	uint8_t		started = 0;
 	uint8_t		fifo_space;
+	uint8_t		q;
 
 	encode_len = ao_fec_encode(d, size, tx_data);
 
 	ao_radio_get(encode_len);
 
+	ao_radio_abort = 0;
+
+	/* Flush any pending TX bytes */
+	ao_radio_strobe(CC1120_SFTX);
+
 	started = 0;
 	fifo_space = CC1120_FIFO_SIZE;
 	while (encode_len) {