| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino
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1 /*!
2 LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4
5 DATASHEET_CUSTOM_THERMOCOUPLE.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_memory_table();
82 void configure_channels();
83 void configure_global_parameters();
84
85
86 // -------------- Configure the LTC2983 -------------------------------
87 void setup()
88 {
89 char demo_name[]="DC2209"; // Demo Board Name stored in QuikEval EEPROM
90 quikeval_I2C_init(); // Configure the EEPROM I2C port for 100kHz
91 quikeval_SPI_init(); // Configure the spi port for 4MHz SCK
92 quikeval_SPI_connect(); // Connect SPI to main data port
93 pinMode(CHIP_SELECT, OUTPUT); // Configure chip select pin on Linduino
94
95 Serial.begin(115200); // Initialize the serial port to the PC
96 print_title();
97 discover_demo_board(demo_name);
98
99 configure_channels();
100 configure_memory_table();
101 configure_global_parameters();
102 }
103
104
105 void configure_channels()
106 {
107 uint8_t channel_number;
108 uint32_t channel_assignment_data;
109
110 // ----- Channel 1: Assign Custom Thermocouple -----
111 channel_assignment_data =
112 SENSOR_TYPE__CUSTOM_THERMOCOUPLE |
113 TC_COLD_JUNCTION_CH__2 |
114 TC_SINGLE_ENDED |
115 TC_OPEN_CKT_DETECT__NO |
116 TC_OPEN_CKT_DETECT_CURRENT__10UA |
117 (uint32_t) 0x0 << TC_CUSTOM_ADDRESS_LSB | // tc - custom address: 0.
118 (uint32_t) 0x9 << TC_CUSTOM_LENGTH_1_LSB; // tc - custom length-1: 9.
119 assign_channel(CHIP_SELECT, 1, channel_assignment_data);
120 // ----- Channel 2: Assign Off-Chip Diode -----
121 channel_assignment_data =
122 SENSOR_TYPE__OFF_CHIP_DIODE |
123 DIODE_SINGLE_ENDED |
124 DIODE_NUM_READINGS__3 |
125 DIODE_AVERAGING_ON |
126 DIODE_CURRENT__20UA_80UA_160UA |
127 (uint32_t) 0x100C49 << DIODE_IDEALITY_FACTOR_LSB; // diode - ideality factor(eta): 1.00299930572509765625
128 assign_channel(CHIP_SELECT, 2, channel_assignment_data);
129
130 }
131
132
133 void configure_memory_table()
134 {
135 uint16_t start_address;
136 uint16_t table_length;
137 // int i;
138
139 // -- Channel 1 custom table --
140 table_coeffs ch_1_coefficients[] =
141 {
142 { 15954412, 0 }, // -- -50.22, 0.0
143 { 16282419, 101478 }, // -- -30.2, 99.1
144 { 16690381, 138650 }, // -- -5.3, 135.4
145 { 0, 279706 }, // -- 0.0, 273.15
146 { 658637, 369869 }, // -- 40.2, 361.2
147 { 906035, 534630 }, // -- 55.3, 522.1
148 { 1446707, 737587 }, // -- 88.3, 720.3
149 { 2165965, 830669 }, // -- 132.2, 811.2
150 { 3091661, 944640 }, // -- 188.7, 922.5
151 { 7543194, 1024000 } // -- 460.4, 1000.0
152 };
153 start_address = (uint16_t) 592; // Real address = 6*0 + 0x250 = 592
154 table_length = (uint8_t) 10; // Real table length = 9 + 1 = 10
155 write_custom_table(CHIP_SELECT, ch_1_coefficients, start_address, table_length);
156
157
158 }
159
160
161
162 void configure_global_parameters()
163 {
164 // -- Set global parameters
165 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xF0, TEMP_UNIT__C |
166 REJECTION__50_60_HZ);
167 // -- Set any extra delay between conversions (in this case, 0*100us)
168 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xFF, 0);
169 }
170
171 // -------------- Run the LTC2983 -------------------------------------
172
173 void loop()
174 {
175 measure_channel(CHIP_SELECT, 1, TEMPERATURE); // Ch 1: Custom Thermocouple
176 measure_channel(CHIP_SELECT, 2, TEMPERATURE); // Ch 2: Off-Chip Diode
177 }
WRITE_TO_RAM
#define WRITE_TO_RAM
Definition: configuration_constants_LTC2983.h:326
TEMPERATURE
#define TEMPERATURE
setup
static void setup()
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:87
assign_channel
void assign_channel(uint8_t chip_select, uint8_t channel_number, uint32_t channel_assignment_data)
Definition: support_functions_LTC2983.cpp:90
configure_global_parameters
static void configure_global_parameters()
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:162
TC_CUSTOM_ADDRESS_LSB
#define TC_CUSTOM_ADDRESS_LSB
Definition: configuration_constants_LTC2983.h:268
Linduino.h
Header File for Linduino Libraries and Demo Code.
DIODE_NUM_READINGS__3
#define DIODE_NUM_READINGS__3
Definition: configuration_constants_LTC2983.h:283
TC_CUSTOM_LENGTH_1_LSB
#define TC_CUSTOM_LENGTH_1_LSB
Definition: configuration_constants_LTC2983.h:270
TC_SINGLE_ENDED
#define TC_SINGLE_ENDED
Definition: configuration_constants_LTC2983.h:256
table_coeffs
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
Definition: table_coeffs_LTC2983.h:51
loop
static void loop()
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:173
SENSOR_TYPE__OFF_CHIP_DIODE
#define SENSOR_TYPE__OFF_CHIP_DIODE
Definition: configuration_constants_LTC2983.h:98
configure_channels
static void configure_channels()
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:105
configuration_constants_LTC2983.h
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
table_coeffs_LTC2983.h
QuikEval_EEPROM.h
QuikEval EEPROM Library.
TC_COLD_JUNCTION_CH__2
#define TC_COLD_JUNCTION_CH__2
Definition: configuration_constants_LTC2983.h:234
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
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
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
write_custom_table
void write_custom_table(uint8_t chip_select, struct table_coeffs coefficients[64], uint16_t start_address, uint8_t table_length)
Definition: support_functions_LTC2983.cpp:97
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
DIODE_AVERAGING_ON
#define DIODE_AVERAGING_ON
Definition: configuration_constants_LTC2983.h:287
LT_I2C.h
LT_I2C: Routines to communicate with ATmega328P&#39;s hardware I2C port.
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
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_memory_table
static void configure_memory_table()
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:133
quikeval_I2C_init
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
Definition: LT_I2C.cpp:394
CHIP_SELECT
#define CHIP_SELECT
Definition: 2983/DATASHEET_CUSTOM_THERMOCOUPLE/DATASHEET_CUSTOM_THERMOCOUPLE.ino:78
SENSOR_TYPE__CUSTOM_THERMOCOUPLE
#define SENSOR_TYPE__CUSTOM_THERMOCOUPLE
Definition: configuration_constants_LTC2983.h:96
TEMP_UNIT__C
#define TEMP_UNIT__C
Definition: configuration_constants_LTC2983.h:302
TC_OPEN_CKT_DETECT__NO
#define TC_OPEN_CKT_DETECT__NO
Definition: configuration_constants_LTC2983.h:259
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