| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino
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1 /*!
2 LTC2984: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4
5 DATASHEET_CUSTOM_STEINHART_HART.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_memory_table();
82 void configure_channels();
83 void configure_global_parameters();
84
85
86 // -------------- Configure the LTC2984 -------------------------------
87 void setup()
88 {
89 char demo_name[]="DC2399"; // 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) 0x9DD000 << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 10100.
114 assign_channel(CHIP_SELECT, 4, channel_assignment_data);
115 // ----- Channel 5: Assign Thermistor Custom Steinhart-Hart -----
116 channel_assignment_data =
117 SENSOR_TYPE__THERMISTOR_CUSTOM_STEINHART_HART |
118 THERMISTOR_RSENSE_CHANNEL__4 |
119 THERMISTOR_SINGLE_ENDED |
120 THERMISTOR_EXCITATION_MODE__NO_SHARING_NO_ROTATION |
121 THERMISTOR_EXCITATION_CURRENT__1UA |
122 (uint32_t) 0x1E << THERMISTOR_CUSTOM_ADDRESS_LSB; // thermistor - custom address: 30.
123 assign_channel(CHIP_SELECT, 5, channel_assignment_data);
124
125 }
126
127
128 void configure_memory_table()
129 {
130 uint16_t start_address;
131 uint16_t table_length;
132 // int i;
133
134
135 // -- Channel 5 Steinhart-Hart --
136 uint32_t ch_5_steinhart_hart_coefficients[] =
137 {
138 985533933, // -- For coefficient 0.00144999998156
139 965509722, // -- For coefficient 0.000268000003416
140 0, // -- For coefficient 0.0
141 875567098, // -- For coefficient 1.63999999359e-07
142 0, // -- For coefficient 0.0
143 0 // -- For coefficient 0.0
144 };
145 start_address = 772; // Real address = 6*30 + 0x250 = 772
146 write_custom_steinhart_hart(CHIP_SELECT, ch_5_steinhart_hart_coefficients, start_address);
147
148
149 }
150
151
152
153 void configure_global_parameters()
154 {
155 // -- Set global parameters
156 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xF0, TEMP_UNIT__C |
157 REJECTION__50_60_HZ);
158 // -- Set any extra delay between conversions (in this case, 0*100us)
159 transfer_byte(CHIP_SELECT, WRITE_TO_RAM, 0xFF, 0);
160 }
161
162 // -------------- Run the LTC2984 -------------------------------------
163
164 void loop()
165 {
166 measure_channel(CHIP_SELECT, 5, TEMPERATURE); // Ch 5: Thermistor Custom Steinhart-Hart
167 }
CHIP_SELECT
#define CHIP_SELECT
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:78
WRITE_TO_RAM
#define WRITE_TO_RAM
Definition: configuration_constants_LTC2983.h:326
configure_channels
static void configure_channels()
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:105
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
SENSOR_TYPE__THERMISTOR_CUSTOM_STEINHART_HART
#define SENSOR_TYPE__THERMISTOR_CUSTOM_STEINHART_HART
Definition: configuration_constants_LTC2983.h:85
loop
static void loop()
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:164
Linduino.h
Header File for Linduino Libraries and Demo Code.
THERMISTOR_SINGLE_ENDED
#define THERMISTOR_SINGLE_ENDED
Definition: configuration_constants_LTC2983.h:200
support_functions_LTC2984.h
LTC2984: Multi-Sensor High Accuracy Digital Temperature Measurement System.
write_custom_steinhart_hart
void write_custom_steinhart_hart(uint8_t chip_select, uint32_t steinhart_hart_coeffs[6], uint16_t start_address)
Definition: support_functions_LTC2983.cpp:124
THERMISTOR_CUSTOM_ADDRESS_LSB
#define THERMISTOR_CUSTOM_ADDRESS_LSB
Definition: configuration_constants_LTC2983.h:222
table_coeffs_LTC2984.h
configure_memory_table
static void configure_memory_table()
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:128
THERMISTOR_EXCITATION_MODE__NO_SHARING_NO_ROTATION
#define THERMISTOR_EXCITATION_MODE__NO_SHARING_NO_ROTATION
Definition: configuration_constants_LTC2983.h:203
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
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
THERMISTOR_RSENSE_CHANNEL__4
#define THERMISTOR_RSENSE_CHANNEL__4
Definition: configuration_constants_LTC2983.h:180
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
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
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
UserInterface.h
THERMISTOR_EXCITATION_CURRENT__1UA
#define THERMISTOR_EXCITATION_CURRENT__1UA
Definition: configuration_constants_LTC2983.h:211
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
configure_global_parameters
static void configure_global_parameters()
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:153
SENSOR_TYPE__SENSE_RESISTOR
#define SENSOR_TYPE__SENSE_RESISTOR
Definition: configuration_constants_LTC2983.h:72
setup
static void setup()
Definition: 2984/DATASHEET_CUSTOM_STEINHART_HART/DATASHEET_CUSTOM_STEINHART_HART.ino:87
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