better comments

1 files changed, 7 insertions, 4 deletions

diff --git a/microwire.lua b/microwire.lua
index 993a8b5..e2b5654 100644
--- a/microwire.lua
+++ b/microwire.lua
@@ -34,21 +34,24 @@ function microwire_setup_interface ()
 end
 
 function microwire_send_data( data )
-	-- essentially send data via spi interface and raise Load Enable
+	-- essentially send data via spi interface
+	-- and raise Load Enable pin for a bit (at least for25 nS) at the end of transmission
+	
 	-- first low LE pin
 	gpio.write(microwire_sle, gpio.LOW)
+
 	-- second send the data
 	local nBytes = spi.send(spiID, data)
+
 	-- finally raise LE pin for at least 25 ns,
-	
 	gpio.write(microwire_sle, gpio.HIGH)
 	-- but since optocoupler is limiting us we will do it for longer
-	local microwireLEonTime = 100; -- in uS
+	local microwireLEonTime = 100; -- time is in uS
 
 	-- the easiest to use tmr.delay( timeIn_uS ) but this halts everything
 	-- tmr.delay( microwireLEonTime )
 	-- so we use timer but unfortunately the smallest time is 1ms
-	microwireLEonTime = 1; -- now time is in mS
+	microwireLEonTime = 1; -- time is in mS for timers
 	microwire_tmr = tmr.create()
 	microwire_tmr:register(microwireLEonTime, tmr.ALARM_SINGLE, function() gpio.write(microwire_sle, gpio.LOW) end)
 	microwire_tmr:start()