local outputs = { "GtSt" }

local function init()
  setSerialBaudrate(115200)
end

local function run()
  local d
  local v

  lcd.clear()

  lcd.drawFilledRectangle(0, 0, LCD_W, 18, SOLID)
  lcd.drawText(5, 3, "CHANNEL MONITOR", INVERS)

  local logo = "49KS"
  local logoWidth = lcd.sizeText(logo, DBLSIZE)
  local logoX = (LCD_W - logoWidth) / 2
  local logoY = 30

  lcd.drawText(logoX + 2, logoY + 2, logo, DBLSIZE)
  lcd.drawText(logoX, logoY, logo, DBLSIZE + INVERS)

  local dividerY = logoY + 45
  lcd.drawLine(0, dividerY, LCD_W, dividerY, SOLID, FORCE)

  local startY = dividerY + 15
  local lineSpacing = 12

  d = "$RM,"
  for i = 1, 24 do
    v = getValue("ch" .. i)
    v = math.floor(v / 2) + 1500
    d = d .. v
    if i < 24 then
      d = d .. ","
    end

    local col, row
    if i <= 12 then
      col = 15
      row = startY + (i * lineSpacing)
    else
      col = (LCD_W / 2) + 10
      row = startY + ((i - 12) * lineSpacing)
    end

    lcd.drawText(col, row, string.format("CH%02d: %4d", i, v), SMLSIZE)
  end

  local frameTop = dividerY + 10
  lcd.drawRectangle(5, frameTop, LCD_W - 10, LCD_H - frameTop - 5, SOLID)

  serialWrite(d .. "\r\n")

  return 0
end

return { output = outputs, run = run, init = init }