Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board
DC2507A_MULTI_SENSOR_BOARD_THERMOCOUPLE_PT100_CJ.ino
Go to the documentation of this file.
1 /*!
2 LTC2986: Multi-Sensor High Accuracy Digital Temperature Measurement System
3 @verbatim
4 
5 DC2507A_MULTI_SENSOR_BOARD_THERMOCOUPLE_PT100_CJ.ino:
6 Generated Linduino code from the LTC2986 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 LTC2986.
9 
10 
11 @endverbatim
12 
13 http://www.linear.com/product/LTC2986
14 
15 http://www.linear.com/product/LTC2986#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 LTC2986
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 
76 #include "table_coeffs_LTC2986.h"
77 
78 #define CHIP_SELECT QUIKEVAL_CS // Chip select pin
79 
80 // Function prototypes
82 void configure_channels();
84 
85 
86 // -------------- Configure the LTC2986 -------------------------------
87 void setup()
88 {
89  char demo_name[]="DC2508"; // 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 
102 }
103 
104 
106 {
107  uint8_t channel_number;
108  uint32_t channel_assignment_data;
109 
110  // ----- Channel 2: Assign Sense Resistor -----
111  channel_assignment_data =
113  (uint32_t) 0x1F4000 << SENSE_RESISTOR_VALUE_LSB; // sense resistor - value: 2000.
114  assign_channel(CHIP_SELECT, 2, channel_assignment_data);
115  // ----- Channel 4: Assign RTD PT-100 -----
116  channel_assignment_data =
123  assign_channel(CHIP_SELECT, 4, channel_assignment_data);
124  // ----- Channel 6: Assign Type K Thermocouple -----
125  channel_assignment_data =
131  assign_channel(CHIP_SELECT, 6, channel_assignment_data);
132  // ----- Channel 9: Assign Off-Chip Diode -----
133  channel_assignment_data =
139  (uint32_t) 0x100C49 << DIODE_IDEALITY_FACTOR_LSB; // diode - ideality factor(eta): 1.00299930572509765625
140  assign_channel(CHIP_SELECT, 9, channel_assignment_data);
141  // ----- Channel 10: Assign Active Analog -----
142  channel_assignment_data =
145  (uint32_t) 0x0 << ACTIVE_ANALOG_CUSTOM_ADDRESS_LSB | // active analog - custom address: 0.
146  (uint32_t) 0x2 << ACTIVE_ANALOG_CUSTOM_LENGTH_1_LSB; // active analog - custom length-1: 2.
147  assign_channel(CHIP_SELECT, 10, channel_assignment_data);
148 
149 }
150 
151 
153 {
154  uint16_t start_address;
155  uint16_t table_length;
156  // int i;
157 
158  // -- Channel 10 custom table --
159  table_coeffs ch_10_coefficients[] =
160  {
161  { 0, 0 }, // -- 0.0, 0.0
162  { 3819930, 238746 }, // -- 932.6, 233.15
163  { 6523290, 407706 } // -- 1592.6, 398.15
164  };
165  start_address = (uint16_t) 592; // Real address = 6*0 + 0x250 = 592
166  table_length = (uint8_t) 3; // Real table length = 2 + 1 = 3
167  write_custom_table(CHIP_SELECT, ch_10_coefficients, start_address, table_length);
168 
169 
170 }
171 
172 
173 
175 {
176  // -- Set global parameters
182  // -- Set any extra delay between conversions (in this case, 0*100us)
184 }
185 
186 // -------------- Run the LTC2986 -------------------------------------
187 
188 void loop()
189 {
190  measure_channel(CHIP_SELECT, 4, TEMPERATURE); // Ch 4: RTD PT-100
191  measure_channel(CHIP_SELECT, 6, TEMPERATURE); // Ch 6: Type K Thermocouple
192  measure_channel(CHIP_SELECT, 9, TEMPERATURE); // Ch 9: Off-Chip Diode
193  measure_channel(CHIP_SELECT, 10, TEMPERATURE); // Ch 10: Active Analog
194 }
#define SENSOR_TYPE__TYPE_K_THERMOCOUPLE
#define TEMPERATURE
#define ENABLE_KELVIN_DIFFERENTIAL_THERMISTOR_MODE
#define ACTIVE_ANALOG_CUSTOM_LENGTH_1_LSB
#define SENSOR_TYPE__ACTIVE_ANALOG
void assign_channel(uint8_t chip_select, uint8_t channel_number, uint32_t channel_assignment_data)
#define TC_OPEN_CKT_DETECT__YES
Header File for Linduino Libraries and Demo Code.
#define DIODE_NUM_READINGS__3
#define TC_COLD_JUNCTION_CH__9
#define RTD_STANDARD__AMERICAN
#define TC_SINGLE_ENDED
LTC2983: Multi-Sensor High Accuracy Digital Temperature Measurement System.
#define SENSOR_TYPE__OFF_CHIP_DIODE
QuikEval EEPROM Library.
#define SENSOR_TYPE__RTD_PT_100
LTC2986: Multi-Sensor High Accuracy Digital Temperature Measurement System.
#define DIODE_CURRENT__20UA_80UA_160UA
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
Definition: LT_SPI.cpp:151
int8_t discover_demo_board(char *demo_name)
Read the ID string from the EEPROM and determine if the correct board is connected.
#define REJECTION__50_60_HZ
static void print_title()
Prints the title block when program first starts.
void write_custom_table(uint8_t chip_select, struct table_coeffs coefficients[64], uint16_t start_address, uint8_t table_length)
LT_SPI: Routines to communicate with ATmega328P&#39;s hardware SPI port.
void measure_channel(uint8_t chip_select, uint8_t channel_number, uint8_t channel_output)
#define ENABLE_KELVIN_2_WIRE_RTD_MODE
#define DIODE_SINGLE_ENDED
#define ACTIVE_ANALOG_SINGLE_ENDED
LT_I2C: Routines to communicate with ATmega328P&#39;s hardware I2C port.
#define DIODE_AVERAGING_OFF
#define RTD_EXCITATION_MODE__NO_ROTATION_SHARING
char demo_name[]
Demo Board Name stored in QuikEval EEPROM.
Definition: DC1880A.ino:97
void quikeval_SPI_connect()
Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C...
Definition: LT_SPI.cpp:138
#define TC_OPEN_CKT_DETECT_CURRENT__10UA
LTC2986: Multi-Sensor High Accuracy Digital Temperature Measurement System.
#define DIODE_IDEALITY_FACTOR_LSB
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
Definition: LT_I2C.cpp:394
#define RTD_RSENSE_CHANNEL__2
#define SENSE_RESISTOR_VALUE_LSB
#define ACTIVE_ANALOG_CUSTOM_ADDRESS_LSB
#define SENSOR_TYPE__SENSE_RESISTOR
#define RTD_EXCITATION_CURRENT__50UA
#define ENABLE_KELVIN_3_WIRE_RTD_MODE
uint8_t transfer_byte(uint8_t chip_select, uint8_t ram_read_or_write, uint16_t start_address, uint8_t input_data)
#define RTD_NUM_WIRES__2_WIRE