script/libs/joystick.lua

   1 --[[
   2 @module joystick
   3 @summary joystick 驱动
   4 @version 1.0
   5 @date    2023.04.10
   6 @author  Dozingfiretruck
   7 @usage
   8 -- 用法实例
   9
  10 local joystick = require "joystick"
  11 i2cid = 0
  12 i2c_speed = i2c.FAST
  13 sys.taskInit(function()
  14     i2c.setup(i2cid,i2c_speed)
  15     joystick.init(i2cid)--初始化,传入i2c_id
  16     -- while 1 do
  17         local button_a = joystick.get_button_status(joystick.BUTOON_A)
  18         local button_b = joystick.get_button_status(joystick.BUTOON_B)
  19         local button_select = joystick.get_button_status(joystick.BUTOON_D)
  20         local button_start = joystick.get_button_status(joystick.BUTOON_C)
  21         local joystick_x = joystick.get_joystick_status(joystick.JOYSTICK_X)
  22         local joystick_y = joystick.get_joystick_status(joystick.JOYSTICK_Y)
  23         log.info("joystick", button_a,button_b,button_select,button_start,joystick_x,joystick_y)
  24         sys.wait(1000)
  25     -- end
  26 end)
  27 ]]
  28 local joystick = {}
  29 local sys = require "sys"
  30 local i2cid
  31
  32 local JOYSTICK_ADDRESS_ADDR     =   0x5A
  33
  34 ---器件所用地址
  35 local JOYSTICK_BASE_REG         =   0x10
  36 local JOYSTICK_LEFT_X_REG       =   0x10
  37 local JOYSTICK_LEFT_Y_REG       =   0x11
  38 local JOYSTICK_RIGHT_X_REG      =   0x12
  39 local JOYSTICK_RIGHT_Y_REG      =   0x13
  40
  41 local BUTOON_BASE               =   0x20
  42 local BUTOON_LEFT_REG           =   0x24
  43 local BUTOON_RIGHT_REG          =   0x23
  44 local BUTOON_UP_REG             =   0x22
  45 local BUTOON_DOWN_REG           =   0x21
  46 local JOYSTICK_BUTTON_REG       =   0x20
  47
  48 joystick.PRESS_DOWN             =   0
  49 joystick.PRESS_UP               =   1
  50 joystick.PRESS_REPEAT           =   2
  51 joystick.SINGLE_CLICK           =   3
  52 joystick.DOUBLE_CLICK           =   4
  53 joystick.LONG_PRESS_START       =   5
  54 joystick.LONG_PRESS_HOLD        =   6
  55 joystick.number_of_event        =   7
  56 joystick.NONE_PRESS             =   8
  57
  58 joystick.BUTOON_D               =   0
  59 joystick.BUTOON_B               =   1
  60 joystick.BUTOON_A               =   2
  61 joystick.BUTOON_C               =   3
  62 joystick.BUTTON_J               =   4
  63 joystick.JOYSTICK_X             =   5
  64 joystick.JOYSTICK_Y             =   6
  65
  66 local function joystick_recv(...)
  67     i2c.send(i2cid, JOYSTICK_ADDRESS_ADDR, {...})
  68     local _, read_data = pack.unpack(i2c.recv(0, JOYSTICK_ADDRESS_ADDR, 1), "b")
  69     return read_data
  70 end
  71
  72 function joystick.init(joystick_i2c)
  73     -- i2c.setup(joystick_i2c, i2c.FAST)
  74     i2cid = joystick_i2c
  75 end
  76
  77 function joystick.get_button_status(button)
  78     local status = 0
  79     if button == joystick.BUTOON_D then
  80         status = joystick_recv(BUTOON_LEFT_REG)
  81     elseif button == joystick.BUTOON_B then
  82         status = joystick_recv(BUTOON_RIGHT_REG)
  83     elseif button == joystick.BUTOON_A then
  84         status = joystick_recv(BUTOON_UP_REG)
  85     elseif button == joystick.BUTOON_C then
  86         status = joystick_recv(BUTOON_DOWN_REG)
  87     elseif button == joystick.BUTTON_J then
  88         status = joystick_recv(JOYSTICK_BUTTON_REG)
  89     end
  90     return status
  91 end
  92
  93 function joystick.get_joystick_status(joystick_xy)
  94     local status = 0
  95     if joystick_xy == joystick.JOYSTICK_X then
  96         status = joystick_recv(JOYSTICK_LEFT_X_REG)
  97     elseif joystick_xy == joystick.JOYSTICK_Y then
  98         status = joystick_recv(JOYSTICK_LEFT_Y_REG)
  99     end
 100     return status
 101 end
 102
 103 return joystick