Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

Linear Technology DC1012A-B Demonstration Board. More...

Detailed Description

Linear Technology DC1012A-B Demonstration Board.

LTC2497: 16-Bit, 16-Channel Delta Sigma ADCs with Easy Drive Input Current Cancellation

NOTES
  Setup:
   Set the terminal baud rate to 115200 and select the newline terminator. Equipment
   required is a precision voltage source and a precision voltmeter. Additionally,
   an external power supply is required to provide a negative voltage for Amp V-.
   Set it to anywhere from -1V to -5V. Set Amp V+ to Vcc. Ensure the COM and REF-
   pins are connected to ground. The REF+ pin should be connected to +5V.

  How to test Single-Ended mode:
   The voltage source should be connected to the ADC such that the negative lead is
   connected to the COM(common) pin. The positive lead may be connected to any
   channel input. Ensure voltage is within analog input voltage range -0.3 to 2.5V.

  How to test Differential Mode:
   The voltage source should be connected with positive and negative leads to paired
   channels. The voltage source negative output must also be connected to the COM
   pin in order to provide a ground-referenced voltage. Ensure voltage is within
   analog input voltage range -0.3V to +2.5V. Swapping input voltages results in a
   reversed polarity reading.


USER INPUT DATA FORMAT:
 decimal : 1024
 hex     : 0x400
 octal   : 02000  (leading 0 "zero")
 binary  : B10000000000
 float   : 1024.0

http://www.linear.com/product/LTC2497

http://www.linear.com/product/LTC2497#demoboards

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

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Definition in file DC1012A_B.ino.

Go to the source code of this file.

Functions

static void print_title ()
 Prints the title block when program first starts. More...
 
static void print_prompt ()
 Prints main menu. More...
 
static void print_user_command (uint8_t menu)
 Display selected differential channels. More...
 
static int8_t menu_1_read_single_ended ()
 Read channels in single-ended mode. More...
 
static int8_t menu_2_read_differential ()
 Read channels in differential mode. More...
 
static void menu_3_set_address ()
 Set the I2C 7 bit address. More...
 
static void setup ()
 Initialize Linduino. More...
 
static void loop ()
 Repeats Linduino loop. More...
 

Variables

static uint8_t demo_board_connected
 Set to 1 if the board is connected. More...
 
static float LTC2497_vref = 5.0
 The ideal reference voltage. More...
 
static uint8_t i2c_address = LTC2497_I2C_ADDRESS
 I2C address in 7 bit format for part. More...
 
static uint16_t timeout = 300
 300 ms timeout More...
 
const uint8_t BUILD_COMMAND_SINGLE_ENDED [16]
 Lookup table to build the command for single-ended mode. More...
 
const uint8_t BUILD_COMMAND_DIFF [16]
 Lookup table to build the command for differential mode. More...
 

Function Documentation

◆ loop()

static void loop ( void  )
static

Repeats Linduino loop.

Definition at line 153 of file DC1012A_B.ino.

◆ menu_1_read_single_ended()

static int8_t menu_1_read_single_ended ( )
static

Read channels in single-ended mode.

Returns
0 if successful, 1 is failure

Definition at line 273 of file DC1012A_B.ino.

◆ menu_2_read_differential()

static int8_t menu_2_read_differential ( )
static

Read channels in differential mode.

Returns
0 if successful, 1 is failure

Definition at line 374 of file DC1012A_B.ino.

◆ menu_3_set_address()

static void menu_3_set_address ( )
static

Set the I2C 7 bit address.

Definition at line 477 of file DC1012A_B.ino.

◆ print_prompt()

static void print_prompt ( )
static

Prints main menu.

Definition at line 205 of file DC1012A_B.ino.

◆ print_title()

static void print_title ( void  )
static

Prints the title block when program first starts.

Definition at line 190 of file DC1012A_B.ino.

◆ print_user_command()

static void print_user_command ( uint8_t  menu)
static

Display selected differential channels.

Displaying single-ended channels is straightforward; not so with differential because the inputs can take either polarity.

Definition at line 215 of file DC1012A_B.ino.

◆ setup()

static void setup ( void  )
static

Initialize Linduino.

Definition at line 131 of file DC1012A_B.ino.

Variable Documentation

◆ BUILD_COMMAND_DIFF

const uint8_t BUILD_COMMAND_DIFF[16]
Initial value:
}
#define LTC24XX_MULTI_CH_P13_N12
#define LTC24XX_MULTI_CH_P1_N0
#define LTC24XX_MULTI_CH_P4_N5
#define LTC24XX_MULTI_CH_P9_N8
#define LTC24XX_MULTI_CH_P14_N15
#define LTC24XX_MULTI_CH_P3_N2
#define LTC24XX_MULTI_CH_P2_N3
#define LTC24XX_MULTI_CH_P10_N11
#define LTC24XX_MULTI_CH_P12_N13
#define LTC24XX_MULTI_CH_P5_N4
#define LTC24XX_MULTI_CH_P8_N9
#define LTC24XX_MULTI_CH_P7_N6
#define LTC24XX_MULTI_CH_P15_N14
#define LTC24XX_MULTI_CH_P11_N10
#define LTC24XX_MULTI_CH_P0_N1
#define LTC24XX_MULTI_CH_P6_N7

Lookup table to build the command for differential mode.

Build the command for differential mode

Definition at line 124 of file DC1012A_B.ino.

◆ BUILD_COMMAND_SINGLE_ENDED

const uint8_t BUILD_COMMAND_SINGLE_ENDED[16]
Initial value:
}
#define LTC24XX_MULTI_CH_CH3
#define LTC24XX_MULTI_CH_CH14
#define LTC24XX_MULTI_CH_CH8
#define LTC24XX_MULTI_CH_CH15
#define LTC24XX_MULTI_CH_CH13
#define LTC24XX_MULTI_CH_CH1
#define LTC24XX_MULTI_CH_CH6
#define LTC24XX_MULTI_CH_CH5
#define LTC24XX_MULTI_CH_CH0
#define LTC24XX_MULTI_CH_CH11
#define LTC24XX_MULTI_CH_CH2
#define LTC24XX_MULTI_CH_CH12
#define LTC24XX_MULTI_CH_CH7
#define LTC24XX_MULTI_CH_CH10
#define LTC24XX_MULTI_CH_CH9
#define LTC24XX_MULTI_CH_CH4

Lookup table to build the command for single-ended mode.

Builds the command for single-ended mode

Definition at line 117 of file DC1012A_B.ino.

◆ demo_board_connected

uint8_t demo_board_connected
static

Set to 1 if the board is connected.

Definition at line 109 of file DC1012A_B.ino.

◆ i2c_address

uint8_t i2c_address = LTC2497_I2C_ADDRESS
static

I2C address in 7 bit format for part.

Definition at line 111 of file DC1012A_B.ino.

◆ LTC2497_vref

float LTC2497_vref = 5.0
static

The ideal reference voltage.

Definition at line 110 of file DC1012A_B.ino.

◆ timeout

uint16_t timeout = 300
static

300 ms timeout

Definition at line 112 of file DC1012A_B.ino.