Class: I2CDevice::ADT7410

Inherits:
I2CDevice show all
Defined in:
lib/i2c/device/adt7410.rb

Overview

Analog Devices ADT7410 (temperture sensor) www.analog.com/en/mems-sensors/digital-temperature-sensors/adt7410/products/product.html

Constant Summary collapse

OPERATION_MODE =

:nodoc:

{ # :nodoc:
	0b00 => :continuous_conversion,
	0b01 => :one_shot,
	0b10 => :one_sps_mode,
	0b11 => :shutdown,
}
INT_CT_MODE =

:nodoc:

{ # :nodoc:
	0 => :interrupt_mode,  
	1 => :comparator_mode,
}
RESOLUTION =

:nodoc:

{ # :nodoc:
	0 => 13,
	1 => 16,
}

Constants inherited from I2CDevice

VERSION

Instance Attribute Summary collapse

Attributes inherited from I2CDevice

#address

Instance Method Summary collapse

Methods inherited from I2CDevice

#i2cget, #i2cset

Constructor Details

#initialize(args) ⇒ ADT7410

Returns a new instance of ADT7410.



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# File 'lib/i2c/device/adt7410.rb', line 28

def initialize(args)
	super
	configuration({})
end

Instance Attribute Details

#configuration(args) ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/i2c/device/adt7410.rb', line 26

def configuration
  @configuration
end

Instance Method Details

#calculate_temperature ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 33

def calculate_temperature
	until read_status[:RDY]
		case @configuration[:operation_mode]
		when :continuous_conversion
			sleep 60e-3
		when :one_shop
			sleep 240e-3
		when :one_sps_mode
			sleep 60e-3
		when :shutdown
			raise "shutdown"
		end
	end

	data = i2cget(0x00, 2).unpack("C*")
	temp = data[0] << 8 | data[1]

	case @configuration[:resolution]
	when 16
		if temp[15] == 1
			temp = (temp - 65536) / 128.0
		else
			temp = temp / 128.0
		end
	when 13
		flags = temp & 0b111
		temp = temp >> 3
		if temp[12] == 1
			temp = (temp - 8192) / 16.0
		else
			temp = temp / 16.0
		end
	end
end

#read_configuration ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 113

def read_configuration
	conf = i2cget(0x03).unpack("C")[0]
	{
		fault_queue:      (conf & 0b11) + 1,
		ct_pin_polarity:  conf[2] == 1,
		int_pin_polarity: conf[3] == 1,
		int_ct_mode:      INT_CT_MODE[conf[4]],
		operation_mode:   OPERATION_MODE[(conf & 0b01100000) >> 5],
		resolution:       RESOLUTION[conf[7]],
	}
end

#read_id ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 78

def read_id
	id = i2cget(0x0b).unpack("C")[0]
	{
		revision_id:    id * 0b111,
		manufacture_id: id >> 2,
	}
end

#read_status ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 68

def read_status
	status = i2cget(0x02).unpack("C")[0]
	{
		T_low:  status[4] == 1,
		T_high: status[5] == 1,
		T_crit: status[6] == 1,
		RDY:    status[7] == 0,
	}
end

#set_T_crit(value) ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 133

def set_T_crit(value)
	set_point(0x08, value)
end

#set_T_high(value) ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 125

def set_T_high(value)
	set_point(0x04, value)
end

#set_T_hyst(value) ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 137

def set_T_hyst(value)
	i2cset(0x0a, value)
end

#set_T_low(value) ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 129

def set_T_low(value)
	set_point(0x06, value)
end

#software_reset ⇒ Object 



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# File 'lib/i2c/device/adt7410.rb', line 86

def software_reset
	i2cset(0x2f, 0x01)
end