From 0ba63b54e0faecc7f0c0ccc0dbbaddfd92f90408 Mon Sep 17 00:00:00 2001
From: "Eugeniy E. Mikhailov" <evgmik@gmail.com>
Date: Thu, 23 Jan 2020 17:36:26 -0500
Subject: draft of rf lib

---
 lmx2487lib.lua | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 lmx2487lib.lua

diff --git a/lmx2487lib.lua b/lmx2487lib.lua
new file mode 100644
index 0000000..8cdb36f
--- /dev/null
+++ b/lmx2487lib.lua
@@ -0,0 +1,49 @@
+-- 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} 
+
+function set_lmx2487register(value, register)
+	-- register labeled 0, 1, 2, ..., 7
+	if (lmx2487_registers[register+1] ~= value) then
+		-- 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)
+	end
+	-- otherwise we do nothing
+end
+
+function send_register_lmx2487( register) 
+	if ( lmx2487_need_update[register] ) then
+		print("sending register " .. register .. " with value " .. lmx2487_registers[register])
+		-- do hardware talking
+		lmx2487_need_update[register]=false
+	end
+end
+
+function update_lmx2487state() 
+	for register=7,0,-1 do
+		-- going over registers
+		-- manual suggest to send R0 as last one
+		send_register_lmx2487( register )
+	end
+end
+
+
+function set_lmx2487_board_to_default_state()
+	-- this defaults are historic and borrowed from lmx2487lib.tcl
+	-- defaults (set RF freq to 6.83468635e9 GHz and lock it to 10MHz oscillator)
+	set_lmx2487register(11197502  , 0)
+	set_lmx2487register(4352515   , 1)
+	set_lmx2487register(8560613   , 2)
+	set_lmx2487register(15925287  , 3)
+	set_lmx2487register(10618633  , 4)
+	set_lmx2487register(393579    , 5)
+	set_lmx2487register(8126541   , 6)
+	set_lmx2487register(10639     , 7)
+
+	update_lmx2487state()
+end
+
-- 
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