From 292cb8380b478542555b5f370e8252eafa2f74ac Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 5 Jul 2014 00:04:06 -0700 Subject: altos: Rework packet receive for cc1120 Instead of blocking on PQT, just set up the receiver to start going and when the first bit interrupt comes in, grab the SPI bus if possible and configure it for reception. This improves sensitivity in the radio by a significant amount while making the code conceptually a bit nicer. Signed-off-by: Keith Packard --- src/kernel/ao_mutex.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'src/kernel/ao_mutex.c') diff --git a/src/kernel/ao_mutex.c b/src/kernel/ao_mutex.c index 952ff462..a36fe939 100644 --- a/src/kernel/ao_mutex.c +++ b/src/kernel/ao_mutex.c @@ -17,6 +17,29 @@ #include "ao.h" +#ifndef HAS_MUTEX_TRY +#define HAS_MUTEX_TRY 1 +#endif + +#if HAS_MUTEX_TRY + +uint8_t +ao_mutex_try(__xdata uint8_t *mutex, uint8_t task_id) __reentrant +{ + uint8_t ret; + if (*mutex == task_id) + ao_panic(AO_PANIC_MUTEX); + ao_arch_critical( + if (*mutex) + ret = 0; + else { + *mutex = task_id; + ret = 1; + }); + return ret; +} +#endif + void ao_mutex_get(__xdata uint8_t *mutex) __reentrant { -- cgit v1.2.3