| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino
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1 /*!
2 LTC2984: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4
5 DC2212_THERMOCOUPLE_BOARD.ino:
6 Generated Linduino code from the LTC2984 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 LTC2984.
9
10
11 @endverbatim
12
13 http://www.linear.com/product/LTC2984
14
15 http://www.linear.com/product/LTC2984#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 LTC2984
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_LTC2984.h"
75 #include "support_functions_LTC2984.h"
76 #include "table_coeffs_LTC2984.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 LTC2984 -------------------------------
86 void setup()
87 {
88 char demo_name[]="DC2399"; // 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 1: Assign Type J Thermocouple -----
109 channel_assignment_data =
110 SENSOR_TYPE__TYPE_J_THERMOCOUPLE |
111 TC_COLD_JUNCTION_CH__2 |
112 TC_SINGLE_ENDED |
113 TC_OPEN_CKT_DETECT__YES |
114 TC_OPEN_CKT_DETECT_CURRENT__10UA;
115 assign_channel(CHIP_SELECT, 1, channel_assignment_data);
116 // ----- Channel 2: Assign Off-Chip Diode -----
117 channel_assignment_data =
118 SENSOR_TYPE__OFF_CHIP_DIODE |
119 DIODE_SINGLE_ENDED |
120 DIODE_NUM_READINGS__2 |
121 DIODE_AVERAGING_OFF |
122 DIODE_CURRENT__20UA_80UA_160UA |
123 (uint32_t) 0x100C49 << DIODE_IDEALITY_FACTOR_LSB; // diode - ideality factor(eta): 1.00299930572509765625
124 assign_channel(CHIP_SELECT, 2, channel_assignment_data);
125 // ----- Channel 3: Assign Type K Thermocouple -----
126 channel_assignment_data =
127 SENSOR_TYPE__TYPE_K_THERMOCOUPLE |
128 TC_COLD_JUNCTION_CH__9 |
129 TC_SINGLE_ENDED |
130 TC_OPEN_CKT_DETECT__YES |
131 TC_OPEN_CKT_DETECT_CURRENT__10UA;
132 assign_channel(CHIP_SELECT, 3, channel_assignment_data);
133 // ----- Channel 4: Assign Off-Chip Diode -----
134 channel_assignment_data =
135 SENSOR_TYPE__OFF_CHIP_DIODE |
136 DIODE_SINGLE_ENDED |
137 DIODE_NUM_READINGS__2 |
138 DIODE_AVERAGING_OFF |
139 DIODE_CURRENT__20UA_80UA_160UA |
140 (uint32_t) 0x100C49 << DIODE_IDEALITY_FACTOR_LSB; // diode - ideality factor(eta): 1.00299930572509765625
141 assign_channel(CHIP_SELECT, 4, channel_assignment_data);
142 // ----- Channel 5: Assign Type J Thermocouple -----
143 channel_assignment_data =
144 SENSOR_TYPE__TYPE_J_THERMOCOUPLE |
145 TC_COLD_JUNCTION_CH__NONE |
146 TC_SINGLE_ENDED |
147 TC_OPEN_CKT_DETECT__YES |
148 TC_OPEN_CKT_DETECT_CURRENT__10UA;
149 assign_channel(CHIP_SELECT, 5, channel_assignment_data);
150 // ----- Channel 7: Assign Sense Resistor -----
151 channel_assignment_data =
152 SENSOR_TYPE__SENSE_RESISTOR |
153 (uint32_t) 0x1F4000 << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 2000.
154 assign_channel(CHIP_SELECT, 7, channel_assignment_data);
155 // ----- Channel 9: Assign RTD PT-100 -----
156 channel_assignment_data =
157 SENSOR_TYPE__RTD_PT_100 |
158 RTD_RSENSE_CHANNEL__7 |
159 RTD_NUM_WIRES__4_WIRE |
160 RTD_EXCITATION_MODE__NO_ROTATION_NO_SHARING |
161 RTD_EXCITATION_CURRENT__100UA |
162 RTD_STANDARD__EUROPEAN;
163 assign_channel(CHIP_SELECT, 9, channel_assignment_data);
164 // ----- Channel 10: Assign Type J Thermocouple -----
165 channel_assignment_data =
166 SENSOR_TYPE__TYPE_J_THERMOCOUPLE |
167 TC_COLD_JUNCTION_CH__NONE |
168 TC_SINGLE_ENDED |
169 TC_OPEN_CKT_DETECT__YES |
170 TC_OPEN_CKT_DETECT_CURRENT__10UA;
171 assign_channel(CHIP_SELECT, 10, channel_assignment_data);
172
173 }
174
175
176
177
178 void configure_global_parameters()
179 {
180 // -- Set global parameters
181 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xF0, TEMP_UNIT__C |
182 REJECTION__50_60_HZ);
183 // -- Set any extra delay between conversions (in this case, 0*100us)
184 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xFF, 0);
185 }
186
187 // -------------- Run the LTC2984 -------------------------------------
188
189 void loop()
190 {
191 measure_channel(CHIP_SELECT, 1, TEMPERATURE); // Ch 1: Type J Thermocouple
192 measure_channel(CHIP_SELECT, 2, TEMPERATURE); // Ch 2: Off-Chip Diode
193 measure_channel(CHIP_SELECT, 3, TEMPERATURE); // Ch 3: Type K Thermocouple
194 measure_channel(CHIP_SELECT, 4, TEMPERATURE); // Ch 4: Off-Chip Diode
195 measure_channel(CHIP_SELECT, 5, TEMPERATURE); // Ch 5: Type J Thermocouple
196 measure_channel(CHIP_SELECT, 9, TEMPERATURE); // Ch 9: RTD PT-100
197 measure_channel(CHIP_SELECT, 10, TEMPERATURE); // Ch 10: Type J Thermocouple
198 }
WRITE_TO_RAM
#define WRITE_TO_RAM
Definition: configuration_constants_LTC2983.h:326
SENSOR_TYPE__TYPE_K_THERMOCOUPLE
#define SENSOR_TYPE__TYPE_K_THERMOCOUPLE
Definition: configuration_constants_LTC2983.h:89
TEMPERATURE
#define TEMPERATURE
loop
static void loop()
Definition: 2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino:189
assign_channel
void assign_channel(uint8_t chip_select, uint8_t channel_number, uint32_t channel_assignment_data)
Definition: support_functions_LTC2983.cpp:90
TC_OPEN_CKT_DETECT__YES
#define TC_OPEN_CKT_DETECT__YES
Definition: configuration_constants_LTC2983.h:260
Linduino.h
Header File for Linduino Libraries and Demo Code.
RTD_STANDARD__EUROPEAN
#define RTD_STANDARD__EUROPEAN
Definition: configuration_constants_LTC2983.h:149
TC_COLD_JUNCTION_CH__9
#define TC_COLD_JUNCTION_CH__9
Definition: configuration_constants_LTC2983.h:241
support_functions_LTC2984.h
LTC2984: Multi-Sensor High Accuracy Digital Temperature Measurement System.
DIODE_NUM_READINGS__2
#define DIODE_NUM_READINGS__2
Definition: configuration_constants_LTC2983.h:282
TC_SINGLE_ENDED
#define TC_SINGLE_ENDED
Definition: configuration_constants_LTC2983.h:256
CHIP_SELECT
#define CHIP_SELECT
Definition: 2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino:78
SENSOR_TYPE__OFF_CHIP_DIODE
#define SENSOR_TYPE__OFF_CHIP_DIODE
Definition: configuration_constants_LTC2983.h:98
table_coeffs_LTC2984.h
RTD_NUM_WIRES__4_WIRE
#define RTD_NUM_WIRES__4_WIRE
Definition: configuration_constants_LTC2983.h:129
QuikEval_EEPROM.h
QuikEval EEPROM Library.
TC_COLD_JUNCTION_CH__2
#define TC_COLD_JUNCTION_CH__2
Definition: configuration_constants_LTC2983.h:234
SENSOR_TYPE__RTD_PT_100
#define SENSOR_TYPE__RTD_PT_100
Definition: configuration_constants_LTC2983.h:64
DIODE_CURRENT__20UA_80UA_160UA
#define DIODE_CURRENT__20UA_80UA_160UA
Definition: configuration_constants_LTC2983.h:291
quikeval_SPI_init
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
Definition: LT_SPI.cpp:151
RTD_EXCITATION_MODE__NO_ROTATION_NO_SHARING
#define RTD_EXCITATION_MODE__NO_ROTATION_NO_SHARING
Definition: configuration_constants_LTC2983.h:133
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
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
DIODE_SINGLE_ENDED
#define DIODE_SINGLE_ENDED
Definition: configuration_constants_LTC2983.h:279
setup
static void setup()
Definition: 2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino:86
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.
TC_COLD_JUNCTION_CH__NONE
#define TC_COLD_JUNCTION_CH__NONE
Definition: configuration_constants_LTC2983.h:232
SENSOR_TYPE__TYPE_J_THERMOCOUPLE
#define SENSOR_TYPE__TYPE_J_THERMOCOUPLE
Definition: configuration_constants_LTC2983.h:88
configure_global_parameters
static void configure_global_parameters()
Definition: 2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino:178
DIODE_AVERAGING_OFF
#define DIODE_AVERAGING_OFF
Definition: configuration_constants_LTC2983.h:286
demo_name
char demo_name[]
Demo Board Name stored in QuikEval EEPROM.
Definition: DC1880A.ino:97
configuration_constants_LTC2984.h
LTC2984: Multi-Sensor High Accuracy Digital Temperature Measurement System.
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
RTD_RSENSE_CHANNEL__7
#define RTD_RSENSE_CHANNEL__7
Definition: configuration_constants_LTC2983.h:111
UserInterface.h
TC_OPEN_CKT_DETECT_CURRENT__10UA
#define TC_OPEN_CKT_DETECT_CURRENT__10UA
Definition: configuration_constants_LTC2983.h:263
DIODE_IDEALITY_FACTOR_LSB
#define DIODE_IDEALITY_FACTOR_LSB
Definition: configuration_constants_LTC2983.h:295
configure_channels
static void configure_channels()
Definition: 2984/DC2212_THERMOCOUPLE_BOARD/DC2212_THERMOCOUPLE_BOARD.ino:103
quikeval_I2C_init
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
Definition: LT_I2C.cpp:394
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
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