pflib::Bias Class Reference

The HGC ROC has 4 MAX5825 chips doing the DAC for the bias voltages. More...

#include <Bias.h>

Collaboration diagram for pflib::Bias:

Public Member Functions
	Bias (std::shared_ptr< I2C > bias_i2c, std::shared_ptr< I2C > board_i2c)
	Wrap an I2C class for communicating with all the DAC chips.
void	initialize ()
	Initialize to standard settings Reference voltage - 4.096V.
double	readTemp ()
int	readSiPM (uint8_t i_sipm)
int	readLED (uint8_t i_led)
void	setSiPM (uint8_t i_sipm, uint16_t code)
void	setLED (uint8_t i_led, uint16_t code)

Static Public Attributes
static const uint8_t	ADDR_LED_0 = 0x18
	DAC chip addresses.
static const uint8_t	ADDR_LED_1 = 0x1A
static const uint8_t	ADDR_SIPM_0 = 0x10
static const uint8_t	ADDR_SIPM_1 = 0x12

Private Attributes
std::shared_ptr< I2C >	i2c_bias_
std::shared_ptr< I2C >	i2c_board_
std::vector< MAX5825 >	led_
	LED bias chips.
std::vector< MAX5825 >	sipm_
	SiPM bias chips.

Detailed Description

The HGC ROC has 4 MAX5825 chips doing the DAC for the bias voltages.

Two of the chips handle the 16 LED bias voltages and the other two handle the 16 SiPM bias voltages.

Both the LED and SiPM bias voltages are indexed from 0 to 15. To convert from that index to a chip and DAC index on that chip, just use integer division and modulus.

chip_index = int(index > 7) dac_index = index - 8*chip_index;

Constructor & Destructor Documentation

Bias()

pflib::Bias::Bias	(	std::shared_ptr< I2C >	bias_i2c,
		std::shared_ptr< I2C >	board_i2c )

Wrap an I2C class for communicating with all the DAC chips.

The bus is 4 + <board-number>, so we set the default to 4 for the case where we only have one board with bus number 0.

Member Data Documentation

ADDR_LED_0

const uint8_t pflib::Bias::ADDR_LED_0 = 0x18

static

DAC chip addresses.

DAC chip addresses taken from HGCROC specs.

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The documentation for this class was generated from the following files:

• include/pflib/Bias.h
• src/pflib/Bias.cxx