mirror of https://github.com/arendst/Tasmota.git
81 lines
2.4 KiB
Plaintext
81 lines
2.4 KiB
Plaintext
# Sample Relay driver for 595 shift registers
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# -------------------------------------------------------------------------
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# You can cascade multiple '595 for a total of 28 relays (including other native relays)
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# Include the following lines in 'preinit.be'
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# import Shift595
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# tasmota.add_driver(Shift595(srclk,ser,rclk,count,inverted))
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# where
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# srclk : GPIO number connected to the 595's SRCLK pin (serial shift clock)
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# ser : GPIO number connected to the 595's SER pin (serial data in)
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# rclk : GPIO number connected to the 595's RCLK pin (transfer to output)
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# count : number of used output pins / relays (must be consecutive)
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# inverted : if true, relay is driven by a 0/LOW inverted (instead of 1/HIGH)
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#
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# To use multiple '595, connects
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# all SRCLK together to GPIO srclk
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# all RCLK together to GPIO rclk
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# GPIO ser to SER input of first '595
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# QH' output of first '595 to SER input of 2nd '595 and so on
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# -------------------------------------------------------------------------
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import string
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import gpio
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class Shift595
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var srclk, ser, rclk, count, inverted
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var first, state
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def log_relay(relay)
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var s = ""
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for r:relay if r s+='1' else s+='0' end end
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log("595: "+s,2)
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end
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def shift_out(relay)
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self.log_relay(relay)
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for i:0..size(relay)-1
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var bit
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bit = (relay[size(relay)-1 - i]) ? int(!self.inverted) : int(self.inverted)
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gpio.digital_write(self.srclk, 0)
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gpio.digital_write(self.ser, bit)
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gpio.digital_write(self.srclk, 1)
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end
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gpio.digital_write(self.rclk, 1)
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gpio.digital_write(self.rclk, 0)
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gpio.digital_write(self.srclk, 0)
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end
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def init(srclk, ser, rclk, count, inverted)
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self.srclk= srclk
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self.ser = ser
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self.rclk = rclk
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self.count = count
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self.inverted = inverted
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self.first = tasmota.global.devices_present
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tasmota.global.devices_present += count
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gpio.pin_mode(self.srclk, gpio.OUTPUT)
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gpio.pin_mode(self.ser, gpio.OUTPUT)
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gpio.pin_mode(self.rclk, gpio.OUTPUT)
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gpio.digital_write(self.srclk, 0)
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gpio.digital_write(self.ser, 0)
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gpio.digital_write(self.rclk, 0)
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self.state = 0
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end
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def set_power_handler(cmd, idx)
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var new_state = tasmota.get_power()[self.first..self.first+self.count]
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if self.state != new_state
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self.state = new_state
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self.shift_out(self.state)
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end
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end
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end
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return Shift595 # allow using 'import' instead of 'load()'
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