Class: Denko::AnalogIO::ADS1115

Inherits:
Object
  • Object
show all
Includes:
ADS111X, Behaviors::Lifecycle, I2C::Peripheral
Defined in:
lib/denko/analog_io/ads1115.rb

Constant Summary collapse

I2C_ADDRESS = 
0x48
I2C_FREQUENCY = 
400_000
CONFIG_STARTUP =

Config register values on startup. MSB-first. Matches datasheet, except MSB bit 7 unset to avoid conversion start. Same as: [0x05, 0x83] or [5, 131]

[0b00000101, 0b10000011]
BASE_MSB =

Base config bytes to mask settings into. Not same as startup config. MSB bits 0 and 7 set to enable single-shot mode. LSB bits 0 and 1 set to disable comparator.

0b10000001
BASE_LSB = 
0b00000011
CONFIG_ADDRESS =

Register addresses.

0b01
CONVERSION_ADDRESS = 
0b00

Constants included from ADS111X

Denko::AnalogIO::ADS111X::MUX_SETTINGS, Denko::AnalogIO::ADS111X::PGA_RANGE, Denko::AnalogIO::ADS111X::PGA_SETTINGS, Denko::AnalogIO::ADS111X::SAMPLE_RATE_RANGE, Denko::AnalogIO::ADS111X::SAMPLE_TIMES, Denko::AnalogIO::ADS111X::WAIT_TIMES

Constants included from Behaviors::Reader

Behaviors::Reader::READ_WAIT_TIME

Constants included from Behaviors::Lifecycle

Behaviors::Lifecycle::CALLBACK_METHODS

Constants included from I2C::Peripheral

I2C::Peripheral::I2C_REPEATED_START

Instance Attribute Summary

Attributes included from ADS111X

#active_gain, #active_pin, #config_register

Attributes included from Behaviors::State

#state

Attributes included from I2C::Peripheral

#i2c_frequency, #i2c_repeated_start

Attributes included from Behaviors::Component

#board, #params

Instance Method Summary collapse

Methods included from ADS111X

#analog_listen, #analog_read, #enable_proxy, #mutex, #pins_to_mux_bits, #pre_callback_filter, #stop_listener

Methods included from Behaviors::BoardProxy

#analog_read_high, #analog_write_high, #convert_pin, #high, #low, #set_pin_mode, #start_read

Methods included from Behaviors::Subcomponents

#add_component, #add_hw_i2c, #add_hw_spi, #add_single_pin, #components, #hw_i2c_comps, #hw_spi_comps, #remove_component, #remove_hw_i2c, #remove_hw_spi, #remove_single_pin, #single_pin_components

Methods included from Behaviors::Reader

#read, #read_busy?, #read_nb, #read_raw, #read_using, #update

Methods included from Behaviors::Callbacks

#add_callback, #callbacks, #pre_callback_filter, #remove_callback, #update

Methods included from Behaviors::State

#update_state

Methods included from Behaviors::Lifecycle

included

Methods included from I2C::Peripheral

#address, #i2c_default, #i2c_read, #i2c_read_raw, #i2c_write

Methods included from Behaviors::BusPeripheralAddressed

#address

Methods included from Behaviors::BusPeripheral

#atomically

Methods included from Behaviors::Component

#initialize, #micro_delay

Instance Method Details

#_read(config) ⇒ Object 



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# File 'lib/denko/analog_io/ads1115.rb', line 32

def _read(config)
  # Write config register to start reading.
  i2c_write [CONFIG_ADDRESS] + config

  # Sleep the right amount of time for conversion, based on sample rate bits.
  sleep WAIT_TIMES[config[1] >> 5]

  # Read the result, triggering callbacks.
  i2c_read(2, register: CONVERSION_ADDRESS)
end