mirror of https://github.com/arendst/Tasmota.git
95 lines
2.9 KiB
Plaintext
95 lines
2.9 KiB
Plaintext
# lv_touch_3_buttons
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#
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# Handles a simple case with 3 physical buttons below the screen, like in M5Stack
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#
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# LVGL must be already started to get the screen coordinates.
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# Touches are simulated as actual touch screen:
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# x: is spread at coordinates: 1/6, 1/2, 5/6
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# y: 10 pixels from botton
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#
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# New version: use fast_loop for a more responsive interface
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class lv_touch_3_buttons
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var gpios # (array) physical GPIO numbers for each button, -1 in not assigned
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var x_coords # (array) x coordinates for each button
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var y_coords # (array) y coordinates for each button
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var active_low # (bool) true if button is active low
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# prevous values
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var touched, x, y # previous values (bool, int, int) to be repeated when not touched
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static ACTIVE_HIGH = false
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static ACTIVE_LOW = true
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# Arguments:
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# Physical GPIOs, generally through `gpio.pin(gpio.GPIO_INPUT, 0), gpio.pin(gpio.GPIO_INPUT, 1), gpio.pin(gpio.GPIO_INPUT, 2)`
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#
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# Pre-condition:
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# LVGL must be already started
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def init(btn1, btn2, btn3, active_low)
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import global
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if !global.contains("lv") return end # abort if LVGL is not there
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lv.start() # make sure LVGL is started, or things can go really wrong
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# set current values
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self.x = 0
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self.y = 0
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self.touched = false
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#
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self.active_low = active_low
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self.gpios = [-1, -1, -1]
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# store only valid gpios
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btn1 = int(btn1)
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if btn1 >= 0 self.gpios[0] = btn1 end
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btn2 = int(btn2)
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if btn2 >= 0 self.gpios[1] = btn2 end
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btn3 = int(btn3)
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if btn3 >= 0 self.gpios[2] = btn3 end
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# compute coordinates
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var hres = lv.get_hor_res()
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var vres = lv.get_ver_res() # should be 240
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self.x_coords = [ hres / 6, hres / 2, hres * 5 / 6]
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self.y_coords = [ vres - 10, vres - 10, vres - 10]
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# add self to fast_loop
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tasmota.add_fast_loop(/-> self.fast_loop())
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end
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# scan every 50ms
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def fast_loop()
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import display
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var i = 0
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var x, y
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var touched = false # is there any button pressed
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while i < size(self.gpios)
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var gp = self.gpios[i]
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if gp >= 0 # skip invalid gpio
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var in = bool(gpio.digital_read(gp))
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in = self.active_low ? !in : in # invert if active low
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if in && !touched # first button touched
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x = self.x_coords[i]
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y = self.y_coords[i]
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end
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touched = touched || in
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end
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i += 1
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end
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# if touched, change x/y
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if touched
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self.x = x
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self.y = y
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end
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self.touched = touched
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# return values
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display.touch_update(self.touched ? 1 : 0, self.x, self.y, 0)
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end
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end
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return lv_touch_3_buttons(gpio.pin(gpio.GPIO_INPUT, 0), gpio.pin(gpio.GPIO_INPUT, 1), gpio.pin(gpio.GPIO_INPUT, 2), true)
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#-
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lv_btn3 = lv_touch_3_buttons(gpio.pin(gpio.GPIO_INPUT, 0), gpio.pin(gpio.GPIO_INPUT, 1), gpio.pin(gpio.GPIO_INPUT, 2), lv_touch_3_buttons.ACTIVE_LOW)
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-#
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