' Raspberry Pi LPC1114 I/O Processor Expansion Board SPI Agent Firmware
' LED test program

' Copyright (C)2015-2018, Philip Munts, President, Munts AM Corp.
'
' Redistribution and use in source and binary forms, with or without
' modification, are permitted provided that the following conditions are met:
'
' * Redistributions of source code must retain the above copyright notice,
'   this list of conditions and the following disclaimer.
'
' THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
' IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
' ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
' LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
' CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
' SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
' INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
' CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
' ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
' POSSIBILITY OF SUCH DAMAGE.

' Layout the GUI

IsTablet = LDFile.Exists("C:\ProgramData\MuntsTechnologies\tablet.txt")

GraphicsWindow.Title = "Raspberry Pi LPC1114 LED Test"
GraphicsWindow.BrushColor = "black"

If IsTablet Then
  ' Layout the GUI for Windows tablet

  LDUtilities.GWState = 2
  W = GraphicsWindow.Width
  H = GraphicsWindow.Height

  GraphicsWindow.FontSize = 32
  GraphicsWindow.DrawText(W/2 - 300,  50, "Raspberry Pi LPC1114 I/O Processor")
  GraphicsWindow.DrawText(W/2 - 300, 100, "Expansion Board SPI Agent Firmware")
  GraphicsWindow.DrawText(W/2 - 300, 150, "LED Test")

  GraphicsWindow.FontSize = 30
  GraphicsWindow.DrawText(W/2 - 270, 250, "Server name:")
  TextBoxServerName = Controls.AddTextBox(W/2 - 60, 250)
  ButtonConnect = Controls.AddButton("Connect", W/2 + 120, 250)
  ButtonLED = Controls.AddButton("Waiting", W/2 - 120, 350)
Else
  ' Layout the GUI for Windows Desktop

  GraphicsWindow.Width = 400
  GraphicsWindow.Height = 180
  GraphicsWindow.FontSize = 18
  GraphicsWindow.DrawText(30, 10, "Raspberry Pi LPC1114 I/O Processor")
  GraphicsWindow.DrawText(30, 30, "Expansion Board SPI Agent Firmware")
  GraphicsWindow.DrawText(30, 50, "LED Test")
  GraphicsWindow.FontSize = 14
  GraphicsWindow.DrawText(30, 84, "Server name:")
  TextBoxServerName = Controls.AddTextBox(130, 80)
  ButtonConnect = Controls.AddButton("Connect", 300, 78)
  ButtonLED = Controls.AddButton("Waiting", 140, 120)
  GraphicsWindow.Show()
Endif

Controls.HideControl(ButtonLED)

' Preload server name from command line argument

If Program.ArgumentCount = 1 Then
  Controls.SetTextBoxText(TextBoxServerName, Program.GetArgument(1))
Endif

' Register the button click event handler

Controls.ButtonClicked = ButtonHandler

' Monitor the LPC1114 LED for changes from another program

While "true"
  Program.Delay(500)

  If Controls.GetButtonCaption(ButtonConnect) = "Disconnect" Then
    If SPIAgent.LED = 1 Then
      Controls.SetButtonCaption(ButtonLED, "Turn LED OFF")
    Else
      Controls.SetButtonCaption(ButtonLED, "Turn LED ON")
    EndIF
  EndIf
EndWhile

' This subroutine handles button presses

Sub ButtonHandler
  c = Controls.GetButtonCaption(Controls.LastClickedButton)

  ' Connect button pressed

  If c = "Connect" Then
    SPIAgent.Open(Controls.GetTextBoxText(TextBoxServerName))
    If SPIAgent.error <> 0 Then
      GraphicsWindow.ShowMessage("SPIAgent.Open() returned error " + SPIAgent.error, "ERROR:")
      Goto ButtonHandlerDone
    Endif

    If SPIAgent.LED = 1 Then
      Controls.SetButtonCaption(ButtonLED, "Turn LED OFF")
    Else
      Controls.SetButtonCaption(ButtonLED, "Turn LED ON")
    EndIF

    Controls.SetButtonCaption(ButtonConnect, "Disconnect")
    Controls.ShowControl(ButtonLED)

  ' Disconnect button pressed

  ElseIf c = "Disconnect" Then
    SPIAgent.Close()
    Controls.SetButtonCaption(ButtonConnect, "Connect")
    Controls.HideControl(ButtonLED)

  ' Turn LED ON button pressed

  ElseIf c = "Turn LED ON" Then
    SPIAgent.LED = "ON"
    If SPIAgent.error <> 0 Then
      GraphicsWindow.ShowMessage("SPIAgent.Command() returned error " + SPIAgent.error, "ERROR:")
      SPIAgent.Close()
      Controls.SetButtonCaption(ButtonConnect, "Connect")
      Controls.HideControl(ButtonLED)
      Goto ButtonHandlerDone
    Endif

    Controls.SetButtonCaption(ButtonLED, "Turn LED OFF")

  ' Turn LED OFF button pressed

  ElseIf c = "Turn LED OFF" Then
    SPIAgent.LED = "OFF"
    If SPIAgent.error <> 0 Then
      GraphicsWindow.ShowMessage("SPIAgent.Command() returned error " + SPIAgent.error, "ERROR:")
      SPIAgent.Close()
      Controls.SetButtonCaption(ButtonConnect, "Connect")
      Controls.HideControl(ButtonLED)
      Goto ButtonHandlerDone
    Endif

    Controls.SetButtonCaption(ButtonLED, "Turn LED ON")
  EndIf

  ButtonHandlerDone:
EndSub