| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino
Go to the documentation of this file.
1 /*!
2 LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4
5 DC2213_DEDICATED_RTD_BOARD.ino:
6 Generated Linduino code from the LTC2983 Demo Software.
7 This code is designed to be used by a Linduino,
8 but can also be used to understand how to program the LTC2983.
9
10
11 @endverbatim
12
13 http://www.linear.com/product/LTC2983
14
15 http://www.linear.com/product/LTC2983#demoboards
16
17 Copyright 2018(c) Analog Devices, Inc.
18
19 All rights reserved.
20
21 Redistribution and use in source and binary forms, with or without
22 modification, are permitted provided that the following conditions are met:
23 - Redistributions of source code must retain the above copyright
24 notice, this list of conditions and the following disclaimer.
25 - Redistributions in binary form must reproduce the above copyright
26 notice, this list of conditions and the following disclaimer in
27 the documentation and/or other materials provided with the
28 distribution.
29 - Neither the name of Analog Devices, Inc. nor the names of its
30 contributors may be used to endorse or promote products derived
31 from this software without specific prior written permission.
32 - The use of this software may or may not infringe the patent rights
33 of one or more patent holders. This license does not release you
34 from the requirement that you obtain separate licenses from these
35 patent holders to use this software.
36 - Use of the software either in source or binary form, must be run
37 on or directly connected to an Analog Devices Inc. component.
38
39 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
40 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
41 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
42 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
43 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
45 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
46 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
48 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 */
50
51
52
53 /*! @file
54 @ingroup LTC2983
55
56 */
57
58
59
60
61 #include <Arduino.h>
62 #include <stdint.h>
63 #include <stdbool.h>
64 #include "SPI.h"
65 #include "Wire.h"
66 #include "Linduino.h"
67 #include "LT_SPI.h"
68 #include "UserInterface.h"
69 #include "LT_I2C.h"
70 #include "QuikEval_EEPROM.h"
71 #include "stdio.h"
72 #include "math.h"
73
74 #include "configuration_constants_LTC2983.h"
75 #include "support_functions_LTC2983.h"
76 #include "table_coeffs_LTC2983.h"
77
78 #define CHIP_SELECT QUIKEVAL_CS // Chip select pin
79
80 // Function prototypes
81 void configure_channels();
82 void configure_global_parameters();
83
84
85 // -------------- Configure the LTC2983 -------------------------------
86 void setup()
87 {
88 char demo_name[]="DC2209"; // Demo Board Name stored in QuikEval EEPROM
89 quikeval_I2C_init(); // Configure the EEPROM I2C port for 100kHz
90 quikeval_SPI_init(); // Configure the spi port for 4MHz SCK
91 quikeval_SPI_connect(); // Connect SPI to main data port
92 pinMode(CHIP_SELECT, OUTPUT); // Configure chip select pin on Linduino
93
94 Serial.begin(115200); // Initialize the serial port to the PC
95 print_title();
96 discover_demo_board(demo_name);
97
98 configure_channels();
99 configure_global_parameters();
100 }
101
102
103 void configure_channels()
104 {
105 uint8_t channel_number;
106 uint32_t channel_assignment_data;
107
108 // ----- Channel 3: Assign Sense Resistor -----
109 channel_assignment_data =
110 SENSOR_TYPE__SENSE_RESISTOR |
111 (uint32_t) 0x1F4000 << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 2000.
112 assign_channel(CHIP_SELECT, 3, channel_assignment_data);
113 // ----- Channel 5: Assign RTD PT-100 -----
114 channel_assignment_data =
115 SENSOR_TYPE__RTD_PT_100 |
116 RTD_RSENSE_CHANNEL__3 |
117 RTD_NUM_WIRES__4_WIRE_KELVIN_RSENSE |
118 RTD_EXCITATION_MODE__ROTATION_SHARING |
119 RTD_EXCITATION_CURRENT__250UA |
120 RTD_STANDARD__AMERICAN;
121 assign_channel(CHIP_SELECT, 5, channel_assignment_data);
122 // ----- Channel 8: Assign RTD PT-100 -----
123 channel_assignment_data =
124 SENSOR_TYPE__RTD_PT_100 |
125 RTD_RSENSE_CHANNEL__3 |
126 RTD_NUM_WIRES__4_WIRE_KELVIN_RSENSE |
127 RTD_EXCITATION_MODE__ROTATION_SHARING |
128 RTD_EXCITATION_CURRENT__100UA |
129 RTD_STANDARD__AMERICAN;
130 assign_channel(CHIP_SELECT, 8, channel_assignment_data);
131 // ----- Channel 11: Assign RTD PT-100 -----
132 channel_assignment_data =
133 SENSOR_TYPE__RTD_PT_100 |
134 RTD_RSENSE_CHANNEL__3 |
135 RTD_NUM_WIRES__3_WIRE |
136 RTD_EXCITATION_MODE__NO_ROTATION_SHARING |
137 RTD_EXCITATION_CURRENT__100UA |
138 RTD_STANDARD__AMERICAN;
139 assign_channel(CHIP_SELECT, 11, channel_assignment_data);
140
141 }
142
143
144
145
146 void configure_global_parameters()
147 {
148 // -- Set global parameters
149 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xF0, TEMP_UNIT__C |
150 REJECTION__50_60_HZ);
151 // -- Set any extra delay between conversions (in this case, 0*100us)
152 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xFF, 0);
153 }
154
155 // -------------- Run the LTC2983 -------------------------------------
156
157 void loop()
158 {
159 measure_channel(CHIP_SELECT, 5, TEMPERATURE); // Ch 5: RTD PT-100
160 measure_channel(CHIP_SELECT, 8, TEMPERATURE); // Ch 8: RTD PT-100
161 measure_channel(CHIP_SELECT, 11, TEMPERATURE); // Ch 11: RTD PT-100
162 }
WRITE_TO_RAM
#define WRITE_TO_RAM
Definition: configuration_constants_LTC2983.h:326
TEMPERATURE
#define TEMPERATURE
assign_channel
void assign_channel(uint8_t chip_select, uint8_t channel_number, uint32_t channel_assignment_data)
Definition: support_functions_LTC2983.cpp:90
CHIP_SELECT
#define CHIP_SELECT
Definition: 2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino:78
Linduino.h
Header File for Linduino Libraries and Demo Code.
configure_global_parameters
static void configure_global_parameters()
Definition: 2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino:146
RTD_STANDARD__AMERICAN
#define RTD_STANDARD__AMERICAN
Definition: configuration_constants_LTC2983.h:150
setup
static void setup()
Definition: 2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino:86
configuration_constants_LTC2983.h
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
table_coeffs_LTC2983.h
QuikEval_EEPROM.h
QuikEval EEPROM Library.
SENSOR_TYPE__RTD_PT_100
#define SENSOR_TYPE__RTD_PT_100
Definition: configuration_constants_LTC2983.h:64
quikeval_SPI_init
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
Definition: LT_SPI.cpp:151
RTD_NUM_WIRES__4_WIRE_KELVIN_RSENSE
#define RTD_NUM_WIRES__4_WIRE_KELVIN_RSENSE
Definition: configuration_constants_LTC2983.h:130
support_functions_LTC2983.h
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
discover_demo_board
int8_t discover_demo_board(char *demo_name)
Read the ID string from the EEPROM and determine if the correct board is connected.
Definition: QuikEval_EEPROM.cpp:141
RTD_RSENSE_CHANNEL__3
#define RTD_RSENSE_CHANNEL__3
Definition: configuration_constants_LTC2983.h:107
REJECTION__50_60_HZ
#define REJECTION__50_60_HZ
Definition: configuration_constants_LTC2983.h:299
print_title
static void print_title()
Prints the title block when program first starts.
Definition: _24xx_iso_spi_delay.ino:171
LT_SPI.h
LT_SPI: Routines to communicate with ATmega328P&#39;s hardware SPI port.
measure_channel
void measure_channel(uint8_t chip_select, uint8_t channel_number, uint8_t channel_output)
Definition: support_functions_LTC2983.cpp:152
RTD_EXCITATION_CURRENT__100UA
#define RTD_EXCITATION_CURRENT__100UA
Definition: configuration_constants_LTC2983.h:143
LT_I2C.h
LT_I2C: Routines to communicate with ATmega328P&#39;s hardware I2C port.
RTD_EXCITATION_MODE__NO_ROTATION_SHARING
#define RTD_EXCITATION_MODE__NO_ROTATION_SHARING
Definition: configuration_constants_LTC2983.h:134
demo_name
char demo_name[]
Demo Board Name stored in QuikEval EEPROM.
Definition: DC1880A.ino:97
quikeval_SPI_connect
void quikeval_SPI_connect()
Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C...
Definition: LT_SPI.cpp:138
UserInterface.h
RTD_EXCITATION_MODE__ROTATION_SHARING
#define RTD_EXCITATION_MODE__ROTATION_SHARING
Definition: configuration_constants_LTC2983.h:135
quikeval_I2C_init
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
Definition: LT_I2C.cpp:394
RTD_NUM_WIRES__3_WIRE
#define RTD_NUM_WIRES__3_WIRE
Definition: configuration_constants_LTC2983.h:128
SENSE_RESISTOR_VALUE_LSB
#define SENSE_RESISTOR_VALUE_LSB
Definition: configuration_constants_LTC2983.h:163
SENSOR_TYPE__SENSE_RESISTOR
#define SENSOR_TYPE__SENSE_RESISTOR
Definition: configuration_constants_LTC2983.h:72
TEMP_UNIT__C
#define TEMP_UNIT__C
Definition: configuration_constants_LTC2983.h:302
configure_channels
static void configure_channels()
Definition: 2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino:103
transfer_byte
uint8_t transfer_byte(uint8_t chip_select, uint8_t ram_read_or_write, uint16_t start_address, uint8_t input_data)
Definition: support_functions_LTC2983.cpp:308
RTD_EXCITATION_CURRENT__250UA
#define RTD_EXCITATION_CURRENT__250UA
Definition: configuration_constants_LTC2983.h:144
loop
static void loop()
Definition: 2983/DC2213_DEDICATED_RTD_BOARD/DC2213_DEDICATED_RTD_BOARD.ino:157