| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

DC2693A.ino
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1 /*!
2 Linear Technology DC2693A Demonstration Board
3 LTC5556: Dual Programmable Downconverting Mixer with IF DVGAs
4
5 @verbatim
6
7 The LTC5556 dual programmable gain downconverting mixer
8 is ideal for diversity and MIMO receivers that require
9 precise gain setting. Each channel incorporates an active
10 mixer and a digital IF VGA with 15.5dB gain control range.
11 The IF gain of each channel is programmed in 0.5dB steps
12 through the SPI. A reduced power mode is also available
13 for each channel.
14
15 @endverbatim
16
17 http://www.analog.com/en/products/rf-microwave/mixers/single-double-triple-balanced-mixers/ltc5556.html
18
19 Copyright 2018(c) Analog Devices, Inc.
20
21 All rights reserved.
22
23 Redistribution and use in source and binary forms, with or without
24 modification, are permitted provided that the following conditions are met:
25 - Redistributions of source code must retain the above copyright
26 notice, this list of conditions and the following disclaimer.
27 - Redistributions in binary form must reproduce the above copyright
28 notice, this list of conditions and the following disclaimer in
29 the documentation and/or other materials provided with the
30 distribution.
31 - Neither the name of Analog Devices, Inc. nor the names of its
32 contributors may be used to endorse or promote products derived
33 from this software without specific prior written permission.
34 - The use of this software may or may not infringe the patent rights
35 of one or more patent holders. This license does not release you
36 from the requirement that you obtain separate licenses from these
37 patent holders to use this software.
38 - Use of the software either in source or binary form, must be run
39 on or directly connected to an Analog Devices Inc. component.
40
41 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
42 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
43 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
44 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
45 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
46 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
47 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
48 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
49 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
50 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 */
52
53 /*! @file
54 @ingroup LTC5556
55 */
56
57 #include "LTC5556.h"
58 #include <SPI.h>
59 #include "LT_SPI.h"
60 #include "UserInterface.h"
61 #include "Linduino.h"
62
63 // Function Declarations
64
65 // Print the title block
66 void LTC5556_print_title();
67
68 // Print the initial prompt
69 void LTC5556_print_prompt();
70
71 //! Initialize Linduino
72 //! @return void
73 void setup() {
74 // Configure the SPI port for 4MHz SCK
75 quikeval_SPI_init();
76
77 // Initialize the serial port to the PC
78 Serial.begin(115200);
79
80 // Displays the title
81 LTC5556_print_title();
82
83 // Displays the initial prompt
84 LTC5556_print_prompt();
85 }
86
87 //! Repeats Linduino loop
88 //! @return void
89 void loop() {
90 // The user input command
91 uint8_t user_command;
92
93 // The register value read back from the LTC5556
94 uint16_t output_register;
95
96 // Variable for decoding mixer 1's register value
97 uint8_t byte_1;
98
99 // Variable for decoding mixer 2's register value
100 uint8_t byte_2;
101
102 if (Serial.available()) {
103 // Read the user command
104 user_command = read_int();
105
106 // Print the command to the screen
107 Serial.println(user_command);
108 switch (user_command){
109 case 1:
110 // Run the duplicate settings function
111 output_register = LTC5556_dupl_settings();
112 Serial.println(F("\n\n\nLTC5556 settings:\n"));
113
114 // Decode the resulting value
115 LTC5556_decode_output(output_register);
116 break;
117 case 2:
118 // Run the different settings function
119 output_register = LTC5556_diff_settings();
120
121 // Pick off the least significant 8 bits for decoding
122 byte_1 = output_register & 0xFF;
123
124 // Pick off the most significant 8 bits for decoding
125 byte_2 = output_register >> 8;
126
127 Serial.println(F("\n\n\nLTC5556 Mixer 1 settings:\n"));
128
129 // Decode the resulting value
130 LTC5556_decode_output(byte_1);
131 Serial.println(F("\n\n\nLTC5556 Mixer 2 settings:\n"));
132
133 // Decode the resulting value
134 LTC5556_decode_output(byte_2);
135 break;
136 default:
137 Serial.println(F("\n\nIncorrect Option\n"));
138 }
139 Serial.println(F("\n*****************************************************************\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"));
140 LTC5556_print_prompt();
141 }
142 }
143
144 //! Prints the title block
145 //! @return void
146 void LTC5556_print_title() {
147 Serial.println(F("*****************************************************************"));
148 Serial.println(F("* DC2693A Demonstration Program *"));
149 Serial.println(F("* *"));
150 Serial.println(F("* This program demonstrates how to send data to the LTC5556. *"));
151 Serial.println(F("*****************************************************************"));
152 }
153
154 //! Prints the initial prompt
155 //! @return void
156 void LTC5556_print_prompt() {
157 Serial.println(F("\n1. Same settings for Channels 1 and 2"));
158 Serial.println(F("2. Different settings for Channels 1 and 2\n"));
159 Serial.print(F("Enter a command: "));
160 }
161
user_command
unsigned char user_command
Definition: Serial_EEPROM_Test.ino:75
LTC5556_diff_settings
uint16_t LTC5556_diff_settings()
Function to apply unique settings for each LTC5556 channel.
Definition: LTC5556.cpp:136
loop
static void loop()
Repeats Linduino loop.
Definition: DC2693A.ino:89
LTC5556.h
Copyright 2018(c) Analog Devices, Inc.
LTC5556_dupl_settings
uint8_t LTC5556_dupl_settings()
Function to duplicate settings for both LTC5556 channels.
Definition: LTC5556.cpp:97
Linduino.h
Header File for Linduino Libraries and Demo Code.
LTC5556_print_title
static void LTC5556_print_title()
Prints the title block.
Definition: DC2693A.ino:146
LTC5556_decode_output
void LTC5556_decode_output(uint8_t output_register)
Decode the register value read from the LTC5556.
Definition: LTC5556.cpp:293
setup
static void setup()
Initialize Linduino.
Definition: DC2693A.ino:73
LTC5556_print_prompt
static void LTC5556_print_prompt()
Prints the initial prompt.
Definition: DC2693A.ino:156
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.
UserInterface.h
read_int
int32_t read_int()
Definition: UserInterface.cpp:93