This module provides a high level interface for the HobbyTronics I2C Analog To Digital Converter.
It uses HiPi::Device::I2C as a backend.
The HobbyTronics ADC uses clock stretching which doesn't work correctly with the Raspberry Pi. You can try running the entire I2C bus at a lower speed by setting i2c_baudrate in /boot/config.txt ( a value of 32000 seems to work ) or you might find using the bit banging gpio driver activated by the i2c-gpio overlay works for this ic.
Create a new instance of the class. Optional key value pairs and their defaults are:
my $adc = HiPi::Interface::HobbyTronicsADC->new( address => 0x28, devicename => '/dev/i2c-1', res => 1, fil1 => 0, fil0 => 0 );
I2C address of the ADC.
res, fil0, fil1
when : res == 1 - device has 8 bit resolution res == 0 - device has 10 bit resolution fil0 == 1 - use complimentary feature fil1 currently unused according to datasheet
A convenience method that allows retrieving the value for a single channel
my $val = $adc->read_channel( $channel );
A convenience method that allows retrieving the values for a number of specified channels. The return @vals will contain a number of values equal to the number of @channels requested in the order requested.
my @vals = $adc->read_channels(0,5,7); print $vals . ' is value for channel 0' .qq(\n); print $vals . ' is value for channel 5' .qq(\n); print $vals . ' is value for channel 7' .qq(\n);
Reset all the option flags used in the constructor to the values passed
$adc->set_option_flags( $res, $fil0, $fil1 );