mirror of https://github.com/arendst/Tasmota.git
79 lines
2.2 KiB
Plaintext
79 lines
2.2 KiB
Plaintext
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#-
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- I2C driver for the Touch Screen driver CHSC6540 of the M5Stack Tough
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-
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- This is based on
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- https://github.com/m5stack/M5Tough/blob/master/src/M5Touch.cpp
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- https://github.com/m5stack/M5Tough/blob/master/src/M5Touch.h
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-#
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class CHSC6540 : I2C_Driver
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var tp_int # gpio used as INT - going low when the screen is touched
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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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def init()
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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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self.tp_int = gpio.pin(gpio.INTERRUPT, 0)
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super(self).init("CHSC6540", 0x2E)
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tasmota.add_driver(self)
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# check that display is present
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import introspect
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if !introspect.module("display")
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tasmota.log("I2C: can't start CHSC6540 without display enabled", 3)
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self.wire = nil
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end
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if self.tp_int < 0
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tasmota.log("I2C: can't start CHSC6540 without INTERRUPT-1 gpio configured", 3)
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self.wire = nil
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else
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gpio.pin_mode(self.tp_int, gpio.INPUT_PULLUP)
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end
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# all good, configure device
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if self.wire
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self.write8(0x5A, 0x5A) # INT mode change
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tasmota.add_driver(self)
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end
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end
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# is the screen pressed - i.e. TP_INT is low
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def is_pressed()
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if self.wire == nil return end
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return gpio.digital_read(self.tp_int) == 0
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end
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def every_50ms()
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if self.wire == nil return end
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self.touched = self.is_pressed()
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# tasmota.log("DEBUG> int="+str(self.tp_int)+" touched="+str(self.touched), 2)
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if self.touched
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import string
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var raw_read = self.wire.read_bytes(self.addr, 0x02, 11) # read a series of 11 bytes at from register 0x02
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var pts = raw_read[0]
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if pts <= 0 || pts > 2 return end # wrong
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# supports multi-touch
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#var p0f = (raw_read[4] & 0x10) != 0 # unused for now
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self.x = raw_read.get(1,-2) & 0x0FFF
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self.y = raw_read.get(3,-2) & 0x0FFF
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# tasmota.log(string.format("I2C: screen pressed x=%i y=%i", self.x, self.y), 2)
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# var p1x = raw_read.get(7,2) & 0x0FFF
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# var p1y = raw_read.get(9,2) & 0x0FFF
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end
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# return values
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import display
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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 CHSC6540()
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