From 981413b1aee00dd143fdab08b4fa983f801d652e Mon Sep 17 00:00:00 2001
From: "Eugeniy E. Mikhailov" <evgmik@gmail.com>
Date: Wed, 2 Jun 2021 10:01:33 -0400
Subject: more files written with Charris

---
 lmx2487lib.lua | 19 +++++++++++++------
 main.lua       | 15 +++++++++++----
 microwire.lua  | 18 +++++++++++++-----
 3 files changed, 37 insertions(+), 15 deletions(-)
 mode change 100755 => 100644 lmx2487lib.lua

diff --git a/lmx2487lib.lua b/lmx2487lib.lua
old mode 100755
new mode 100644
index 1034e0f..9250f72
--- a/lmx2487lib.lua
+++ b/lmx2487lib.lua
@@ -1,8 +1,13 @@
+ --[[
+Eugeniy Mikhailov
+1 June 2021
+ (copied over from past work)]]
+
 -- there are 8 registers to track for lmx2487
 -- labeled R0, R1, ..., R7 in the manual
 lmx2487_registers   = {0, 0, 0, 0, 0, 0, 0, 0}
 -- if need update set to true updater script will resend this register
-lmx2487_need_update = {false, false, false, false, false, false, false, false} 
+lmx2487_need_update = {false, false, false, false, false, false, false, false}
 
 function set_lmx2487register(value, register)
 	-- register labeled 0, 1, 2, ..., 7
@@ -10,28 +15,30 @@ function set_lmx2487register(value, register)
 		-- this is new value and thus needs to be updated in hardware
 		lmx2487_registers[register+1] = value
 		lmx2487_need_update[register+1] = true
-		print("updating register " .. register .. " with value " .. value)
+		--print("updating register " .. register .. " with value " .. value)
 	end
 	-- otherwise we do nothing
 end
 
 function get_lmx2487register(register)
 	-- register labeled 0, 1, 2, ..., 7
-	local value = (lmx2487_registers[register+1])
-	print("register " .. register .. " is set to " .. value)
+  local value = (lmx2487_registers[register+1])
+	--print("register " .. register .. " is set to " .. value)
 	return value
 end
 
-function send_register_lmx2487(register)
+function send_register_lmx2487( register)
 	if ( lmx2487_need_update[register +1] ) then
+		--print(tmr.now())
 		print("sending register " .. register .. " with value " .. get_lmx2487register( register ) )
+		--print(tmr.now())
 		-- do hardware talking
 		microwire_send_data( get_lmx2487register( register ) )
 		lmx2487_need_update[register+1]=false
 	end
 end
 
-function update_lmx2487state() 
+function update_lmx2487state()
 	for register=7,0,-1 do
 		-- going over registers
 		-- manual suggest to send R0 as last one
diff --git a/main.lua b/main.lua
index 3636958..0d22c58 100644
--- a/main.lua
+++ b/main.lua
@@ -1,5 +1,12 @@
+ --[[
+Eugeniy Mikhailov
+1 June 2021
+ ]]
+ 
+dofile("binaryLib.lua")
+dofile("microwire.lua")
+dofile("lmx2487lib.lua")
+dofile("freq2lmx2487settings.lua")
 
-dofile("microwire.lc")
-dofile("lmx2487lib.lc")
-collectgarbage()
-
+settings=initSettings()
+setFreq(6.834e9)
diff --git a/microwire.lua b/microwire.lua
index d6c1ff4..ef64a2f 100644
--- a/microwire.lua
+++ b/microwire.lua
@@ -1,3 +1,8 @@
+ --[[
+Eugeniy Mikhailov
+1 June 2021
+(copied over from past work) ]]
+
 -- functions to write registers over microwire interface
 -- it resembles SPI but need extra pin which sends Load Enable (LE) pulse
 -- otherwise SPI sequence is sent into 24 bit FIFO latch register on chip
@@ -8,7 +13,11 @@ microwire_spiID = 1; -- ID=1 --> HSPI in nodemcu language
 microwire_databits=24; -- LMX2487 loads 24 bits sequence per write into a register
 -- lmx2487 can handle up to 20 MHz speed (50 nS per clock) but optocoupler is good for 240kHz
 -- so let's aim for 100 kHz
-microwire_interface_speed = 100000; -- in Hz
+-- value of 1000 Hz is too slow and does not engage the spi clock
+-- values of 10 kHz is not sensed by lmx2487 chip
+-- 100 kHz is shown to work reliably
+-- 1 MHz works too
+microwire_interface_speed = 1000000; -- in Hz
 
 -- we will use SPI ChipSelect pin for LoadEnable pin
 microwire_LE_pin = 8; -- microwire Load Enable pin. 8 --> GPIO15
@@ -28,7 +37,7 @@ function microwire_setup_interface ()
 	-- HSPI /CS  | 8        | GPIO15
 	-- HSPI MOSI | 7        | GPIO13
 	-- HSPI MISO | 6        | GPIO12
-	
+
 	-- Load Enable pin settings
 	-- note that it overwrite unused ChipSelect if pin=8, i.e. GPIO15
 	gpio.mode(microwire_LE_pin, gpio.OUTPUT)
@@ -39,14 +48,14 @@ end
 function microwire_send_data( data )
 	-- essentially send data via spi interface
 	-- and raise Load Enable pin for a bit (at least for 25 nS) at the end of transmission
-	
+
 	-- first low LE pin, it should be low but just to be sure
 	gpio.write(microwire_LE_pin, gpio.LOW)
 
 	-- second send the data
 	local nBytes = spi.send(microwire_spiID, data)
 
-	
+
 	-- finally raise LE pin for at least 25 ns,
 	-- note that it takes about 300 uS on ESP8266 before LE will be HIGH after spi.send
 	-- Note manual toggle like below is quite slow, the shortest duration is 160 uS
@@ -55,4 +64,3 @@ function microwire_send_data( data )
 end
 
 microwire_setup_interface()
-
-- 
cgit v1.2.3