From f32ba1a9079a8cf6b5d742a1df1e7beb1ea5dfcd Mon Sep 17 00:00:00 2001
From: rusefi <rusefillc@gmail.com>
Date: Fri, 15 Nov 2024 22:28:23 -0500
Subject: [PATCH] lua script to turn a rusEFI into an IO-BOX for another rusEFI
 #7075 only:prototype

---
 .../controllers/lua/examples/msio-device.lua  | 62 +++++++++++++++++++
 .../drivers/gpio/can_gpio_msiobox.cpp         |  4 +-
 2 files changed, 64 insertions(+), 2 deletions(-)
 create mode 100644 firmware/controllers/lua/examples/msio-device.lua

diff --git a/firmware/controllers/lua/examples/msio-device.lua b/firmware/controllers/lua/examples/msio-device.lua
new file mode 100644
index 0000000000..dc9fbd303e
--- /dev/null
+++ b/firmware/controllers/lua/examples/msio-device.lua
@@ -0,0 +1,62 @@
+-- this script turns a rusEFI into an MSIO box
+
+setTickRate(300)
+every50msTimer = Timer.new()
+
+baseId = 0x240
+isExtId = 0
+
+-- MOTOROLA order, MSB (Most Significant Byte/Big Endian) comes first
+function setTwoBytesMsb(data, offset, value)
+	value = math.floor(value)
+	data[offset + 1] = value >> 8
+	data[offset + 2] = value & 0xff
+end
+
+local config_packet = { 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
+local tach_packet = { 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
+
+setTwoBytesMsb(config_packet, 4, 5000)
+setTwoBytesMsb(config_packet, 6, 5000)
+
+function onPing(bus, id, dlc, data)
+	print('Got ping')
+  txCan(1, baseId + 8, isExtId, config_packet)
+end
+
+currentState1 = 0
+currentState2 = 0
+
+local frequency = 100
+startPwm(0, frequency, 0)
+startPwm(1, frequency, 0)
+
+function onIoState(bus, id, dlc, data)
+  local state = data[5]
+
+  local newState1 = ((state & 1) ~= 0) and 1 or 0
+  if currentState1 ~= newState1 then
+    currentState1 = newState1
+    print("newState1 " .. newState1)
+    setPwmDuty(0, currentState1)
+  end
+
+  local newState2 = ((state & 2) ~= 0) and 1 or 0
+  if currentState2 ~= newState2 then
+    currentState2 = newState2
+    print("newState2 " .. newState2)
+    setPwmDuty(1, currentState1)
+  end
+end
+
+canRxAdd(1, baseId, onPing)
+canRxAdd(1, baseId + 5, onIoState)
+
+function onTick()
+
+    if every50msTimer:getElapsedSeconds() > 0.05 then
+        every50msTimer:reset()
+        -- random tach packet just to show that we are alive
+        txCan(1, baseId + 0xB, isExtId, tach_packet)
+    end
+end
diff --git a/firmware/hw_layer/drivers/gpio/can_gpio_msiobox.cpp b/firmware/hw_layer/drivers/gpio/can_gpio_msiobox.cpp
index 50e904ad37..63356e7305 100644
--- a/firmware/hw_layer/drivers/gpio/can_gpio_msiobox.cpp
+++ b/firmware/hw_layer/drivers/gpio/can_gpio_msiobox.cpp
@@ -155,9 +155,9 @@ static_assert(sizeof(iobox_tach) == 8);
 typedef enum {
 	MSIOBOX_DISABLED = 0,
 	MSIOBOX_WAIT_INIT,
-	MSIOBOX_WAIT_WHOAMI,
+	MSIOBOX_WAIT_WHOAMI, // 2
 	MSIOBOX_READY,
-	MSIOBOX_FAILED
+	MSIOBOX_FAILED // 4
 } msiobox_state;
 
 class MsIoBox final : public GpioChip, public CanListener {