| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino
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1 /*!
2 LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4
5 DATASHEET_CUSTOM_RTD.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 4: Assign Sense Resistor -----
111 channel_assignment_data =
112 SENSOR_TYPE__SENSE_RESISTOR |
113 (uint32_t) 0x4E20CC << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 5000.19921875
114 assign_channel(CHIP_SELECT, 4, channel_assignment_data);
115 // ----- Channel 6: Assign RTD Custom -----
116 channel_assignment_data =
117 SENSOR_TYPE__RTD_CUSTOM |
118 RTD_RSENSE_CHANNEL__4 |
119 RTD_NUM_WIRES__4_WIRE |
120 RTD_EXCITATION_MODE__ROTATION_SHARING |
121 RTD_EXCITATION_CURRENT__5UA |
122 (uint32_t) 0xA << RTD_CUSTOM_ADDRESS_LSB | // rtd - custom address: 10.
123 (uint32_t) 0x9 << RTD_CUSTOM_LENGTH_1_LSB; // rtd - custom length-1: 9.
124 assign_channel(CHIP_SELECT, 6, channel_assignment_data);
125 // ----- Channel 11: Assign Sense Resistor -----
126 channel_assignment_data =
127 SENSOR_TYPE__SENSE_RESISTOR |
128 (uint32_t) 0x4E20CC << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 5000.19921875
129 assign_channel(CHIP_SELECT, 11, channel_assignment_data);
130
131 }
132
133
134 void configure_memory_table()
135 {
136 uint16_t start_address;
137 uint16_t table_length;
138 // int i;
139
140 // -- Channel 6 custom table --
141 table_coeffs ch_6_coefficients[] =
142 {
143 { 0, 114995 }, // -- 0.0, 112.3
144 { 163840, 205373 }, // -- 80.0, 200.56
145 { 307200, 279716 }, // -- 150.0, 273.16
146 { 527073, 386304 }, // -- 257.36, 377.25
147 { 694723, 501412 }, // -- 339.22, 489.66
148 { 795156, 609505 }, // -- 388.26, 595.22
149 { 1050604, 714619 }, // -- 512.99, 697.87
150 { 1356390, 783503 }, // -- 662.3, 765.14
151 { 1522688, 820449 }, // -- 743.5, 801.22
152 { 4099871, 922112 } // -- 2001.89, 900.5
153 };
154 start_address = (uint16_t) 652; // Real address = 6*10 + 0x250 = 652
155 table_length = (uint8_t) 10; // Real table length = 9 + 1 = 10
156 write_custom_table(CHIP_SELECT, ch_6_coefficients, start_address, table_length);
157
158
159 }
160
161
162
163 void configure_global_parameters()
164 {
165 // -- Set global parameters
166 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xF0, TEMP_UNIT__C |
167 REJECTION__50_60_HZ);
168 // -- Set any extra delay between conversions (in this case, 0*100us)
169 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xFF, 0);
170 }
171
172 // -------------- Run the LTC2983 -------------------------------------
173
174 void loop()
175 {
176 measure_channel(CHIP_SELECT, 6, TEMPERATURE); // Ch 6: RTD Custom
177 }
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
RTD_EXCITATION_CURRENT__5UA
#define RTD_EXCITATION_CURRENT__5UA
Definition: configuration_constants_LTC2983.h:139
CHIP_SELECT
#define CHIP_SELECT
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:78
Linduino.h
Header File for Linduino Libraries and Demo Code.
table_coeffs
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
Definition: table_coeffs_LTC2983.h:51
RTD_CUSTOM_ADDRESS_LSB
#define RTD_CUSTOM_ADDRESS_LSB
Definition: configuration_constants_LTC2983.h:154
loop
static void loop()
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:174
RTD_CUSTOM_LENGTH_1_LSB
#define RTD_CUSTOM_LENGTH_1_LSB
Definition: configuration_constants_LTC2983.h:156
configure_global_parameters
static void configure_global_parameters()
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:163
RTD_NUM_WIRES__4_WIRE
#define RTD_NUM_WIRES__4_WIRE
Definition: configuration_constants_LTC2983.h:129
configuration_constants_LTC2983.h
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
setup
static void setup()
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:87
table_coeffs_LTC2983.h
QuikEval_EEPROM.h
QuikEval EEPROM Library.
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.
configure_memory_table
static void configure_memory_table()
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:134
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
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
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
SENSE_RESISTOR_VALUE_LSB
#define SENSE_RESISTOR_VALUE_LSB
Definition: configuration_constants_LTC2983.h:163
RTD_RSENSE_CHANNEL__4
#define RTD_RSENSE_CHANNEL__4
Definition: configuration_constants_LTC2983.h:108
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
SENSOR_TYPE__RTD_CUSTOM
#define SENSOR_TYPE__RTD_CUSTOM
Definition: configuration_constants_LTC2983.h:70
configure_channels
static void configure_channels()
Definition: 2983/DATASHEET_CUSTOM_RTD/DATASHEET_CUSTOM_RTD.ino:105