| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

DC2460A.ino
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1 /*!
2 Copyright 2018(c) Analog Devices, Inc.
3
4 Linear Technology DC2460A Demonstration Board
5 LTC5566: Dual Programmable Gain Downconverting Mixer
6
7 @verbatim
8
9 The LTC5566 dual programmable gain downconverting mixer
10 is ideal for diversity and MIMO receivers that require precise
11 gain setting. Each channel incorporates an active mixer and a
12 digital IF VGA with 15.5dB gain control range. The IF gain of
13 each channel is programmed in 0.5dB steps through the SPI.
14
15 USER INPUT DATA FORMAT:
16 decimal : 1024
17 hex : 0x400
18 octal : 02000 (leading 0 "zero")
19 binary : B10000000000
20 float : 1024.0
21
22 @endverbatim
23
24 http://www.linear.com/product/LTC5566
25
26 All rights reserved.
27
28 Redistribution and use in source and binary forms, with or without
29 modification, are permitted provided that the following conditions are met:
30 - Redistributions of source code must retain the above copyright
31 notice, this list of conditions and the following disclaimer.
32 - Redistributions in binary form must reproduce the above copyright
33 notice, this list of conditions and the following disclaimer in
34 the documentation and/or other materials provided with the
35 distribution.
36 - Neither the name of Analog Devices, Inc. nor the names of its
37 contributors may be used to endorse or promote products derived
38 from this software without specific prior written permission.
39 - The use of this software may or may not infringe the patent rights
40 of one or more patent holders. This license does not release you
41 from the requirement that you obtain separate licenses from these
42 patent holders to use this software.
43 - Use of the software either in source or binary form, must be run
44 on or directly connected to an Analog Devices Inc. component.
45
46 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
47 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
48 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
50 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
52 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
53 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
54 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
55 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57
58 /*! @file
59 @ingroup LTC5566
60 */
61
62 #include "LTC5566.h"
63 #include "LT_SPI.h"
64 #include "UserInterface.h"
65 #include "Linduino.h"
66 #include <SPI.h>
67
68 // Function Declarations
69
70 // Print the title block
71 void LTC5566_print_title();
72
73 // Print the prompt block
74 void LTC5566_print_prompt();
75
76 //! Initialize Linduino
77 void setup() {
78 // Configure the spi port for 4MHz SCK
79 quikeval_SPI_init();
80
81 // Initialize the serial port to the PC
82 Serial.begin(115200);
83
84 // Displays the title
85 LTC5566_print_title();
86
87 // Displays the initial prompt
88 LTC5566_print_prompt();
89 }
90
91 //! Repeats Linduino loop
92 void loop() {
93 // The user input command
94 uint8_t user_command;
95
96 // The register value read back from the LTC5566
97 uint16_t output_register;
98
99 // Dummy variable for decoding Mixer 1's register value
100 uint8_t byte_1;
101
102 // Dummy variable for decoding Mixer 2's register value
103 uint8_t byte_2;
104
105 // Check for user input
106 if (Serial.available()) {
107 // Read the user command
108 user_command = read_int();
109
110 // Print the command to the screen
111 Serial.println(user_command);
112 switch (user_command) {
113 case 1:
114 // Run the duplicate settings function
115 output_register = LTC5566_dupl_settings();
116 Serial.println(F("\n\n\nLTC5566 settings:\n"));
117
118 // Decode the resulting value
119 LTC5566_decode_output(output_register);
120 break;
121 case 2:
122 // Run the different settings function
123 output_register = LTC5566_diff_settings();
124
125 // Pick off least significant 8 bits for decoding
126 byte_1 = output_register & 0xFF;
127
128 // Pick off most significant 8 bits for decoding
129 byte_2 = output_register >> 8;
130 Serial.println(F("\n\n\nMixer 1 settings:\n"));
131
132 // Decode the resulting value
133 LTC5566_decode_output(byte_1);
134 Serial.println(F("\n\n\nMixer 2 settings:\n"));
135
136 // Decode the resulting value
137 LTC5566_decode_output(byte_2);
138 break;
139 default:
140 Serial.println(F("\n\nIncorrect Option\n"));
141 }
142 Serial.println(F("\n*****************************************************************\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"));
143 LTC5566_print_prompt();
144 }
145 }
146
147 //! Print the title block
148 void LTC5566_print_title() {
149 Serial.println(F("*****************************************************************"));
150 Serial.println(F("* DC2460A Demonstration Program *"));
151 Serial.println(F("* *"));
152 Serial.println(F("* This program demonstrates how to send data to the LTC5566. *"));
153 Serial.println(F("*****************************************************************"));
154 }
155
156 //! Prints the main menu
157 void LTC5566_print_prompt() {
158 Serial.println(F("\n1. Same settings for Channels A and B"));
159 Serial.println(F("2. Different settings for Channels A and B\n"));
160 Serial.print(F("Enter a command: "));
161 }
user_command
unsigned char user_command
Definition: Serial_EEPROM_Test.ino:75
LTC5566_dupl_settings
uint8_t LTC5566_dupl_settings()
Function to duplicate settings for both LTC5566 channels.
Definition: LTC5566.cpp:95
Linduino.h
Header File for Linduino Libraries and Demo Code.
LTC5566_print_prompt
static void LTC5566_print_prompt()
Prints the main menu.
Definition: DC2460A.ino:157
LTC5566.h
Copyright 2018(c) Analog Devices, Inc.
quikeval_SPI_init
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
Definition: LT_SPI.cpp:151
LT_SPI.h
LT_SPI: Routines to communicate with ATmega328P&#39;s hardware SPI port.
setup
static void setup()
Initialize Linduino.
Definition: DC2460A.ino:77
UserInterface.h
read_int
int32_t read_int()
Definition: UserInterface.cpp:93
LTC5566_diff_settings
uint16_t LTC5566_diff_settings()
Function to apply unique settings for each LTC5566 channel.
Definition: LTC5566.cpp:143
LTC5566_print_title
static void LTC5566_print_title()
Print the title block.
Definition: DC2460A.ino:148
LTC5566_decode_output
void LTC5566_decode_output(uint8_t output_register)
Decode the register value read from the LTC5555.
Definition: LTC5566.cpp:372
loop
static void loop()
Repeats Linduino loop.
Definition: DC2460A.ino:92