Fix the STM32 PWM driver pulse count logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4298 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 4 insertions, 1 deletions

diff --git a/nuttx/drivers/pwm.c b/nuttx/drivers/pwm.c
index 6a613f3b5..adfe0e2e8 100644
--- a/nuttx/drivers/pwm.c
+++ b/nuttx/drivers/pwm.c
@@ -322,7 +322,7 @@ static int pwm_start(FAR struct pwm_upperhalf_s *upper, unsigned int oflags)
        * We do these things before starting the PWM to avoid race conditions.
        */
 
-      upper->waiting = (upper->info.count > 0) && ((oflags & O_NONBLOCK) != 0);
+      upper->waiting = (upper->info.count > 0) && ((oflags & O_NONBLOCK) == 0);
       upper->started = true;
 
       /* Invoke the bottom half method to start the pulse train */
@@ -354,6 +354,7 @@ static int pwm_start(FAR struct pwm_upperhalf_s *upper, unsigned int oflags)
         {
           /* Looks like we won't be waiting after all */
 
+          pwmvdbg("start failed: %d\n", ret);
           upper->started = false;
           upper->waiting = false;
         }
@@ -649,6 +650,8 @@ void pwm_expired(FAR void *handle)
 {
   FAR struct pwm_upperhalf_s *upper = (FAR struct pwm_upperhalf_s *)handle;
 
+  pwmllvdbg("started: %d waiting: %d\n", upper->started, upper->waiting);
+
   /* Make sure that the PWM is started */
 
   if (upper->started)