X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=arducontrol%2Fs88.c;h=bd53deb72f55e252e2c88db1ed609e42fa896bae;hb=f0f49dd7ecb27635906557267a733dd8bdb8a9f7;hp=cfe536734be49a78fa7642193148822120304bcb;hpb=4150740d3a5c2384289865923cef08c5852cb520;p=model-railway-devices.git

diff --git a/arducontrol/s88.c b/arducontrol/s88.c
index cfe5367..bd53deb 100644
--- a/arducontrol/s88.c
+++ b/arducontrol/s88.c
@@ -28,15 +28,17 @@ void s88_init(void)
 
 void s88_check(void)
 {
+	/* Check remaining read count before ringbuffer fill.  If it is zero, no
+	more bytes are arriving in the buffer and the contents can be sent out. */
+	uint8_t rc = s88_read_count;
 	uint8_t count = ringbuffer_fill(s88_buffer);
-	if(count>=4 || (count>0 && !s88_read_count))
+	if(count>=4 || (count>0 && !rc))
 	{
 		uint8_t reply[10];
-		uint8_t i;
 
 		reply[0] = S88_DATA;
 		reply[1] = s88_out_index;
-		for(i=0; i<count; ++i)
+		for(uint8_t i=0; i<count; ++i)
 			reply[2+i] = ringbuffer_pop(s88_buffer);
 		interface_send(reply, 2+count);
 		s88_out_index += count;