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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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Linear Technology DC1009A-A Demonstration Board. More...
Linear Technology DC1009A-A Demonstration Board.
LTC2492: 24-Bit, 4-Channel Delta Sigma ADC with SPI interface
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. 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/LTC2492
http://www.linear.com/product/LTC2492#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:
THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Definition in file DC1009AA.ino.
Go to the source code of this file.
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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 uint8_t | menu_1_read_single_ended () |
Read channels in single-ended mode. More... | |
static uint8_t | menu_2_read_differential () |
Read channels in differential mode. More... | |
static void | menu_3_set_1X2X () |
Set 1X or 2X mode. More... | |
static void | setup () |
Initialize Linduino. More... | |
static void | loop () |
Repeats Linduino loop. More... | |
static void | menu_4_select_rejection_freq () |
Set 1X or 2X mode. More... | |
Variables | |
static uint8_t | demo_board_connected |
Set to 1 if the board is connected. More... | |
static uint8_t | two_x_mode = LTC2492_SPEED_1X |
The LTC2492 2X Mode settings. More... | |
static uint8_t | rejection_mode = LTC2492_R50_R60 |
The LTC2492 rejection mode settings. More... | |
static float | LTC2492_vref = 5.0 |
The LTC2492 ideal reference voltage. More... | |
static uint16_t | eoc_timeout = 350 |
timeout in ms More... | |
const uint8_t | BUILD_COMMAND_SINGLE_ENDED [4] |
Lookup table to build the command for single-ended mode. More... | |
const uint8_t | BUILD_COMMAND_DIFF [4] |
Lookup table to build the command for differential mode. More... | |
const uint8_t | BUILD_1X_2X_COMMAND [2] = {LTC2492_SPEED_1X, LTC2492_SPEED_2X} |
Lookup table to build 1X / 2X bits. More... | |
const uint8_t | BUILD_FREQ_REJ_COMMAND [3] = {LTC2492_R50, LTC2492_R60, LTC2492_R50_R60} |
Lookup table to build 1X / 2X bits. More... | |
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Repeats Linduino loop.
Definition at line 145 of file DC1009AA.ino.
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Read channels in single-ended mode.
Definition at line 233 of file DC1009AA.ino.
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Read channels in differential mode.
Definition at line 322 of file DC1009AA.ino.
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Set 1X or 2X mode.
Definition at line 376 of file DC1009AA.ino.
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Set 1X or 2X mode.
Definition at line 402 of file DC1009AA.ino.
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Prints main menu.
Definition at line 200 of file DC1009AA.ino.
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Prints the title block when program first starts.
Definition at line 185 of file DC1009AA.ino.
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Display selected differential channels.
Displaying single-ended channels is straightforward; not so with differential because the inputs can take either polarity.
Definition at line 211 of file DC1009AA.ino.
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Initialize Linduino.
Definition at line 121 of file DC1009AA.ino.
const uint8_t BUILD_1X_2X_COMMAND[2] = {LTC2492_SPEED_1X, LTC2492_SPEED_2X} |
Lookup table to build 1X / 2X bits.
Build the command for 1x or 2x mode
Definition at line 115 of file DC1009AA.ino.
const uint8_t BUILD_COMMAND_DIFF[4] |
Lookup table to build the command for differential mode.
Build the command for differential mode
Definition at line 111 of file DC1009AA.ino.
const uint8_t BUILD_COMMAND_SINGLE_ENDED[4] |
Lookup table to build the command for single-ended mode.
Builds the command for single-ended mode
Definition at line 107 of file DC1009AA.ino.
const uint8_t BUILD_FREQ_REJ_COMMAND[3] = {LTC2492_R50, LTC2492_R60, LTC2492_R50_R60} |
Lookup table to build 1X / 2X bits.
Build the command for 1x or 2x mode
Definition at line 118 of file DC1009AA.ino.
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Set to 1 if the board is connected.
Definition at line 99 of file DC1009AA.ino.
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timeout in ms
Definition at line 103 of file DC1009AA.ino.
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The LTC2492 ideal reference voltage.
Definition at line 102 of file DC1009AA.ino.
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The LTC2492 rejection mode settings.
Definition at line 101 of file DC1009AA.ino.
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The LTC2492 2X Mode settings.
Definition at line 100 of file DC1009AA.ino.