Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board
DC1466.ino
Go to the documentation of this file.
1 /*!
2 Linear Technology DC1466 Demonstration Board.
3 LTC2636: Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference.
4 
5 Linear Technology DC1488 Demonstration Board.
6 LTC2634: Quad 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference.
7 
8 @verbatim
9 NOTES
10  Setup:
11  Set the terminal baud rate to 115200 and select the newline terminator.
12  The program displays calculated voltages which are based on the voltage
13  of the reference used, be it internal or external. A precision voltmeter
14  is needed to verify the actual measured voltages against the calculated
15  voltage displayed. If an external reference is used, a precision voltage
16  source is required to apply the external reference voltage. A
17  precision voltmeter is also required to measure the external reference
18  voltage. No external power supply is required. Any assembly option
19  may be used: DC1466A-A, DC1466A-B, DC1466A-C, DC1466A-D.
20 
21 
22  Explanation of Commands:
23  1- Select DAC: Select one of four DACs to test : A, B, C, D.
24 
25  2- Write to DAC input register: Value is stored in the DAC for updating
26  later, allowing multiple channels to be updated at once, either
27  through a software "Update All" command or by asserting the LDAC# pin.
28  User will be prompted to enter either a code in hex or decimal, or a
29  voltage. If a voltage is entered, a code will be calculated based on
30  the active scaling and reference parameters - ideal values if no
31  calibration was ever stored.
32 
33  3- Write and Update: Similar to item 1, but DAC is updated immediately.
34 
35  4- Update DAC: Copies the value from the input register into the DAC
36  Register. Note that a "write and update" command writes the code to
37  BOTH the input register and DAC register, so subsequent "update"
38  commands will simply re-copy the same data (no change in output.)
39 
40  5- Power Down DAC: Disable DAC output. Power supply current is reduced.
41  DAC code present in DAC registers at time of shutdown are preserved.
42 
43  6- Set reference mode, either internal or external: Selecting external
44  mode prompts for the external reference voltage, which is used directly
45  if no individual DAC calibration is stored. The selection and entered
46  voltage are stored to EEPROM so it is persistent across reset / power cycles.
47 
48 USER INPUT DATA FORMAT:
49  decimal : 1024
50  hex : 0x400
51  octal : 02000 (leading 0 "zero")
52  binary : B10000000000
53  float : 1024.0
54 
55 @endverbatim
56 
57 http://www.linear.com/product/LTC2636
58 http://www.linear.com/product/LTC2634
59 
60 http://www.linear.com/product/LTC2636#demoboards
61 http://www.linear.com/product/LTC2634#demoboards
62 
63 
64 Copyright 2018(c) Analog Devices, Inc.
65 
66 All rights reserved.
67 
68 Redistribution and use in source and binary forms, with or without
69 modification, are permitted provided that the following conditions are met:
70  - Redistributions of source code must retain the above copyright
71  notice, this list of conditions and the following disclaimer.
72  - Redistributions in binary form must reproduce the above copyright
73  notice, this list of conditions and the following disclaimer in
74  the documentation and/or other materials provided with the
75  distribution.
76  - Neither the name of Analog Devices, Inc. nor the names of its
77  contributors may be used to endorse or promote products derived
78  from this software without specific prior written permission.
79  - The use of this software may or may not infringe the patent rights
80  of one or more patent holders. This license does not release you
81  from the requirement that you obtain separate licenses from these
82  patent holders to use this software.
83  - Use of the software either in source or binary form, must be run
84  on or directly connected to an Analog Devices Inc. component.
85 
86 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
87 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
88 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
89 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
90 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
91 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
92 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
93 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
94 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
95 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
96  */
97 
98 /*! @file
99  @ingroup LTC2636
100 */
101 
102 #include <Arduino.h>
103 #include <stdint.h>
104 #include "Linduino.h"
105 #include "LT_SPI.h"
106 #include "UserInterface.h"
107 #include "LT_I2C.h"
108 #include "QuikEval_EEPROM.h"
109 #include "LTC2636.h"
110 #include <SPI.h>
111 #include <Wire.h>
112 
113 // DAC Reference State
114 // Could have been zero or 1, this allows you to use the
115 // variable "reference_mode" as the command argument to a write
116 #define REF_INTERNAL LTC2636_CMD_INTERNAL_REFERENCE //!< Stored reference state is Internal
117 #define REF_EXTERNAL LTC2636_CMD_EXTERNAL_REFERENCE //!< Stored reference state is External
118 
119 // Function Declaration
120 void restore_calibration(); // Read the DAC calibration from EEPROM, Return 1 if successful, 0 if not
121 void print_title(); // Print the title block
122 void print_prompt(int16_t selected_dac); // Prompt the user for an input command
123 int16_t prompt_voltage_or_code();
124 uint16_t get_voltage(float LTC2636_lsb, int16_t LTC2636_offset);
125 uint16_t get_code();
126 
127 void menu_1_select_dac(int16_t *selected_dac);
128 void menu_2_write_to_input_register(int16_t selected_dac);
129 void menu_3_write_and_update_dac(int16_t selected_dac);
130 void menu_4_update_power_up_dac(int16_t selected_dac);
131 void menu_5_power_down_dac(int16_t selected_dac);
132 void menu_6_set_reference_mode(); // Int, ext, if ext, prompt for voltage
133 int8_t menu_7_calibrate_dacs();
134 
135 // Global variables
136 static uint8_t demo_board_connected; //!< Set to 1 if the board is connected
137 static uint8_t shift_count; //!< The data align shift count. For 12-bits=4, 10-bits=6, 8-bits=8
138 static uint8_t reference_mode; //!< Tells whether to set internal or external reference
139 static float reference_voltage; //!< Reference voltage, either internal or external
140 static int16_t LTC2636_offset[9]; //!< DAC offset - index 8 for "all DACs"
141 static float LTC2636_lsb[9]; //!< The LTC2636 lsb - index 8 for "all DACs"
142 static uint8_t num_of_channels = 8; // Change to 4 for LTC2634.
143 
144 // Constants
145 //! Lookup table for DAC address. Allows the "All DACs" address to be indexed right after DAC D in loops.
146 //! This technique is very useful for devices with non-monotonic channel addresses.
148 
149 //! Used to keep track to print voltage or print code
150 enum
151 {
152  PROMPT_VOLTAGE = 0, /**< 0 */
153  PROMPT_CODE = 1 /**< 1 */
154 };
155 
156 //! Initialize Linduino
157 void setup()
158 // Setup the program
159 {
160  char demo_name[] = "DC1466"; // Demo Board Name stored in QuikEval EEPROM
161  quikeval_SPI_init(); // Configure the spi port for 4MHz SCK
162  quikeval_SPI_connect(); // Connect SPI to main data port
163  quikeval_I2C_init(); // Configure the EEPROM I2C port for 100kHz
164  Serial.begin(115200); // Initialize the serial port to the PC
165  print_title();
168  {
170  print_prompt(0);
171  }
172 }
173 
174 //! Repeats Linduino loop
175 void loop()
176 {
177  int16_t user_command;
178  static int16_t selected_dac = 0; // The selected DAC to be updated (0=A, 1=B ... 8=All). Initialized to "A".
179  // The main control loop
180  if (demo_board_connected) // Do nothing if the demo board is not connected
181  {
182  if (Serial.available()) // Check for user input
183  {
184  user_command = read_int(); // Read the user command
185  Serial.println(user_command);
186  Serial.flush();
187  switch (user_command)
188  {
189  case 1:
190  menu_1_select_dac(&selected_dac);
191  break;
192  case 2:
193  menu_2_write_to_input_register(selected_dac);
194  break;
195  case 3:
196  menu_3_write_and_update_dac(selected_dac);
197  break;
198  case 4:
199  menu_4_update_power_up_dac(selected_dac);
200  break;
201  case 5:
202  menu_5_power_down_dac(selected_dac);
203  break;
204  case 6:
206  break;
207  case 7:
210  break;
211  default:
212  Serial.println("Incorrect Option");
213  break;
214  }
215  Serial.println("\n*****************************************************************");
216  print_prompt(selected_dac);
217  }
218  }
219 }
220 
221 // Function Definitions
222 
223 //! Select which DAC to operate on
224 void menu_1_select_dac(int16_t *selected_dac)
225 {
226  // Select a DAC to operate on
227  Serial.print(F("Select DAC to operate on (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H, 8=All): "));
228  *selected_dac = read_int();
229  if (*selected_dac != num_of_channels)
230  Serial.println((char) (*selected_dac + 0x41));
231  else
232  Serial.println(F("All"));
233 }
234 
235 //! Write data to input register, but do not update DAC output
236 void menu_2_write_to_input_register(int16_t selected_dac)
237 {
238  uint16_t dac_code;
239 
241  dac_code = get_voltage(LTC2636_lsb[selected_dac], LTC2636_offset[selected_dac]);
242  else
243  dac_code = get_code();
244  LTC2636_write(LTC2636_CS, LTC2636_CMD_WRITE, address_map[selected_dac], dac_code << shift_count);
245 }
246 
247 //!Write data to DAC register (which updates output immediately)
248 void menu_3_write_and_update_dac(int16_t selected_dac)
249 {
250  uint16_t dac_code;
251 
253  dac_code = get_voltage(LTC2636_lsb[selected_dac], LTC2636_offset[selected_dac]);
254  else
255  dac_code = get_code();
256  Serial.print("Code: ");
257  Serial.println(dac_code, HEX);
259 }
260 
261 //! Update DAC with data that is stored in input register, power up if sleeping
262 void menu_4_update_power_up_dac(int16_t selected_dac)
263 {
264  // Update DAC
265  LTC2636_write(LTC2636_CS,LTC2636_CMD_UPDATE, address_map[selected_dac], 0x0000);
266  Serial.print("DAC ");
267  if (selected_dac != num_of_channels)
268  Serial.print((char) (selected_dac + 0x41));
269  else
270  Serial.print("All");
271  Serial.println(" powered up!");
272 }
273 
274 //! Power down DAC
275 void menu_5_power_down_dac(int16_t selected_dac)
276 {
277  // Power down DAC
279  Serial.print("DAC ");
280  if (selected_dac != num_of_channels)
281  Serial.print((char) (selected_dac + 0x41));
282  else
283  Serial.print("All");
284  Serial.println(" powered down!");
285 }
286 
287 //! Set reference mode and store to EEPROM
288 void menu_6_set_reference_mode(void) // int, ext, if ext, prompt for voltage
289 {
290  int16_t user_input;
291  Serial.println("Select reference mode - 0 for Internal, 1 for External");
292  user_input = read_int();
293  if (user_input == 1)
294  {
296  Serial.println(F("External reference mode selected"));
297  }
298  else
299  {
301  Serial.println(F("Internal reference mode selected"));
302  }
304 }
305 
306 //! Calibrate all DACs by measuring two known outputs
307 //! @return 0
309 {
310  // Calibrate the DACs using a multi-meter
311  uint8_t i;
312  for (i = 0; i < num_of_channels; i++)
313  {
314  calibrate_dac(i); // Run calibration routine
315  }
316  return (0);
317 }
318 
319 //! Read stored calibration parameters from nonvolatile EEPROM on demo board
320 //! @return void
322 {
323  uint8_t i;
324  float dac_count; // The number of codes, 4096 for 12 bits, 65536 for 16 bits
325 
327  {
328  Serial.println(F("External reference mode set"));
329  Serial.print("Enter external reference voltage: ");
331  Serial.print(reference_voltage, 3);
332  Serial.println("V");
333  }
334  else // EITHER reference is set to internal, OR not programmed in which case default to internal
335  {
336  reference_mode = REF_INTERNAL; // Redundant if already set
337  Serial.println("Internal reference mode set");
338  }
340  // The following two IF statements are used to allow the program to run with
341  // a QuikEval string that does not contain the demo board option.
342  // If the demo board option is found then these values are overwritten.
343  if (strcmp(demo_board.product_name, "LTC2636-LM") == 0)
344  {
345  // LTC2636-LM, 12-bits, 2.5V full scale
346  shift_count = 4;
348  {
349  reference_voltage = 2.5;
350  Serial.println("Internal reference voltage = 2.5 V");
351  }
352  dac_count = 4096;
353  }
354  if (strcmp(demo_board.product_name, "LTC2636-HZ") == 0)
355  {
356  // LTC2636-HZ, 12-bits, 4.096V full scale
357  shift_count = 4;
359  {
360  reference_voltage = 4.096;
361  Serial.println("Internal reference voltage = 4.096 V");
362  }
363  dac_count = 4096;
364  }
365  if (strcmp(demo_board.product_name, "LTC2636-HM") == 0)
366  {
367  // LTC2636-HM, 12-bits, 4.096V full scale
368  shift_count = 4;
370  {
371  reference_voltage = 4.096;
372  Serial.println("Internal reference voltage = 4.096 V");
373  }
374  dac_count = 4096;
375  }
376  if (strcmp(demo_board.product_name, "LTC2636-LZ") == 0)
377  {
378  // LTC2636-LZ, 12-bits, 4.096V full scale
379  shift_count = 4;
381  {
382  reference_voltage = 4.096;
383  Serial.println("Internal reference voltage = 4.096 V");
384  }
385  dac_count = 4096;
386  }
387 
388  for (i = 0; i <= num_of_channels; i++)
389  {
390  LTC2636_offset[i] = 0;
391  LTC2636_lsb[i] = reference_voltage / dac_count;
392  }
393 }
394 
395 //! Prints the title block when program first starts.
397 {
398  Serial.println("");
399  Serial.println(F("*****************************************************************"));
400  Serial.println(F("* DC1678 Demonstration Program *"));
401  Serial.println(F("* *"));
402  Serial.println(F("* This program demonstrates how to send data to the LTC2636 *"));
403  Serial.println(F("* quad 16/12-bit DAC found on the DC1678 demo board. *"));
404  Serial.println(F("* *"));
405  Serial.println(F("* Set the baud rate to 115200 and select the newline terminator.*"));
406  Serial.println(F("* *"));
407  Serial.println(F("*****************************************************************"));
408 }
409 
410 //! Prints main menu.
411 void print_prompt(int16_t selected_dac)
412 {
413  Serial.println(F("\nCommand Summary:"));
414  Serial.println(F(" 1-Select DAC"));
415  Serial.println(F(" 2-Write to input register (no update)"));
416  Serial.println(F(" 3-Write and update DAC"));
417  Serial.println(F(" 4-Update / power up DAC"));
418  Serial.println(F(" 5-Power down DAC"));
419  Serial.println(F(" 6-Set reference mode"));
420  Serial.println(F(" 7-Calibrate DAC"));
421 
422  Serial.println("\nPresent Values:");
423  Serial.print(" Selected DAC: ");
424  if (selected_dac != num_of_channels)
425  Serial.println((char) (selected_dac + 0x41));
426  else
427  Serial.println("All");
428  Serial.print(" DAC Reference: ");
430  Serial.println("Internal");
431  else
432  {
433  Serial.print(F("External "));
434  Serial.print(reference_voltage, 3);
435  Serial.println(F("V reference, please verify"));
436  }
437  Serial.print(F("Enter a command: "));
438  Serial.flush();
439 }
440 
441 //! Prompt user to enter a voltage or digital code to send to DAC
442 //! @returns user input
444 {
445  int16_t user_input;
446  Serial.print(F("Type 1 to enter voltage, 2 to enter code:"));
447  Serial.flush();
448  user_input = read_int();
449  Serial.println(user_input);
450 
451  if (user_input != 2)
452  return(PROMPT_VOLTAGE);
453  else
454  return(PROMPT_CODE);
455 }
456 
457 //! Get voltage from user input, calculate DAC code based on lsb, offset
458 //! @returns the DAC code
459 uint16_t get_voltage(float LTC2636_lsb, int16_t LTC2636_offset)
460 {
461  float dac_voltage;
462 
463  Serial.print(F("Enter Desired DAC output voltage: "));
464  dac_voltage = read_float();
465  Serial.print(dac_voltage, 3);
466  Serial.println(" V");
467  Serial.flush();
468  return(LTC2636_voltage_to_code(dac_voltage, LTC2636_lsb, LTC2636_offset));
469 }
470 
471 //! Get code to send to DAC directly, in decimal, hex, or binary
472 //! @return code from user
473 uint16_t get_code()
474 {
475  uint16_t returncode;
476  Serial.println("Enter Desired DAC Code");
477  Serial.print("(Format 32768, 0x8000, 0100000, or B1000000000000000): ");
478  returncode = (uint16_t) read_int();
479  Serial.print("0x");
480  Serial.println(returncode, HEX);
481  Serial.flush();
482  return(returncode);
483 }
484 
485 //! Calibrate the selected DAC using a voltmeter. The routine
486 //! does a linear curve fit given two data points.
487 //! @return ACK bit (0=acknowledge, 1=no acknowledge)
488 int8_t calibrate_dac(uint8_t index)
489 {
490  int8_t ack=0;
491  uint16_t code1 = 0x0200; //! Calibration code 1
492  uint16_t code2 = 0x0FFF; //! Calibration code 2
493  float voltage1; //! Calibration voltage 1
494  float voltage2; //! Calibration voltage 2
495  Serial.println("");
496  Serial.print("Calibrating DAC ");
497  Serial.println((char) (0x41 + index));
498  // Left align 12-bit code1 to 16 bits & write to DAC
500  Serial.print("DAC code set to 0x");
501  Serial.println(code1, HEX);
502  Serial.print("Enter measured DAC voltage:");
503  voltage1 = read_float();
504  Serial.print(voltage1, 6);
505  Serial.println(" V");
506  // Left align 12-bit code2 to 16 bits & write to DAC
508  Serial.print("DAC code set to 0x");
509  Serial.println(code2, HEX);
510  Serial.print("Enter measured DAC voltage:");
511  voltage2 = read_float();
512  Serial.print(voltage2, 6);
513  Serial.println(" V");
514  LTC2636_calibrate(code1, code2, voltage1, voltage2, &LTC2636_lsb[index], &LTC2636_offset[index]);
515  return(ack);
516 }
#define LTC2636_CMD_WRITE_UPDATE
Write to input register n, update (power up) all.
Definition: LTC2636.h:121
struct demo_board_type demo_board
Instantiate demo board structure.
LTC2636: Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference.
static uint8_t shift_count
The data align shift count.
Definition: DC1466.ino:137
static float LTC2636_lsb[9]
The LTC2636 lsb - index 8 for "all DACs".
Definition: DC1466.ino:141
unsigned char user_command
static int16_t prompt_voltage_or_code()
Prompt user to enter a voltage or digital code to send to DAC.
Definition: DC1466.ino:443
static void menu_2_write_to_input_register(int16_t selected_dac)
Write data to input register, but do not update DAC output.
Definition: DC1466.ino:236
#define REF_INTERNAL
Stored reference state is Internal.
Definition: DC1466.ino:116
Header File for Linduino Libraries and Demo Code.
static void menu_3_write_and_update_dac(int16_t selected_dac)
Write data to DAC register (which updates output immediately)
Definition: DC1466.ino:248
#define LTC2636_DAC_ALL
Definition: LTC2636.h:140
static int8_t calibrate_dac(uint8_t index)
Calibrate the selected DAC using a voltmeter.
Definition: DC1466.ino:488
static uint8_t demo_board_connected
Set to 1 if the board is connected.
Definition: DC1466.ino:136
static void print_prompt(int16_t selected_dac)
Prints main menu.
Definition: DC1466.ino:411
static int8_t menu_7_calibrate_dacs()
Calibrate all DACs by measuring two known outputs.
Definition: DC1466.ino:308
#define LTC2636_CS
Define the SPI CS pin.
Definition: LTC2636.h:112
static int16_t LTC2636_offset[9]
DAC offset - index 8 for "all DACs".
Definition: DC1466.ino:140
static void menu_1_select_dac(int16_t *selected_dac)
Select which DAC to operate on.
Definition: DC1466.ino:224
static void print_title()
Prints the title block when program first starts.
Definition: DC1466.ino:396
static uint16_t get_code()
Get code to send to DAC directly, in decimal, hex, or binary.
Definition: DC1466.ino:473
#define LTC2636_DAC_C
Definition: LTC2636.h:134
#define LTC2636_DAC_F
Definition: LTC2636.h:137
static uint8_t num_of_channels
Definition: DC1466.ino:142
#define LTC2636_CMD_UPDATE
Update (power up) DAC register n.
Definition: LTC2636.h:119
static float reference_voltage
Reference voltage, either internal or external.
Definition: DC1466.ino:139
QuikEval EEPROM Library.
uint16_t LTC2636_voltage_to_code(float dac_voltage, float LTC2636_lsb, int16_t LTC2636_offset)
Calculate a LTC2636 DAC code given the desired output voltage, offset, and LSB value.
Definition: LTC2636.cpp:99
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
Definition: LT_SPI.cpp:151
#define LTC2636_CMD_WRITE
Write to input register n.
Definition: LTC2636.h:118
int8_t discover_demo_board(char *demo_name)
Read the ID string from the EEPROM and determine if the correct board is connected.
static void restore_calibration()
Read stored calibration parameters from nonvolatile EEPROM on demo board.
Definition: DC1466.ino:321
static void loop()
Repeats Linduino loop.
Definition: DC1466.ino:175
LT_SPI: Routines to communicate with ATmega328P&#39;s hardware SPI port.
void LTC2636_calibrate(uint16_t dac_code1, uint16_t dac_code2, float voltage1, float voltage2, float *LTC2636_lsb, int16_t *LTC2636_offset)
Calculate the LTC2636 offset and LSB voltages given two measured voltages and their corresponding cod...
Definition: LTC2636.cpp:120
#define LTC2636_DAC_B
Definition: LTC2636.h:133
#define LTC2636_DAC_E
Definition: LTC2636.h:136
static uint16_t get_voltage(float LTC2636_lsb, int16_t LTC2636_offset)
Get voltage from user input, calculate DAC code based on lsb, offset.
Definition: DC1466.ino:459
LT_I2C: Routines to communicate with ATmega328P&#39;s hardware I2C port.
char demo_name[]
Demo Board Name stored in QuikEval EEPROM.
Definition: DC1880A.ino:97
static void menu_6_set_reference_mode()
Set reference mode and store to EEPROM.
Definition: DC1466.ino:288
static void setup()
Initialize Linduino.
Definition: DC1466.ino:157
void quikeval_SPI_connect()
Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C...
Definition: LT_SPI.cpp:138
int32_t read_int()
static int index
float read_float()
char product_name[15]
LTC Product (LTC2654-L16)
static void menu_5_power_down_dac(int16_t selected_dac)
Power down DAC.
Definition: DC1466.ino:275
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
Definition: LT_I2C.cpp:394
const uint8_t address_map[9]
Lookup table for DAC address.
Definition: DC1466.ino:147
static int i
Definition: DC2430A.ino:184
#define LTC2636_CMD_POWER_DOWN
Power down n.
Definition: LTC2636.h:122
#define REF_EXTERNAL
Stored reference state is External.
Definition: DC1466.ino:117
#define LTC2636_DAC_D
Definition: LTC2636.h:135
static uint8_t reference_mode
Tells whether to set internal or external reference.
Definition: DC1466.ino:138
void LTC2636_write(uint8_t cs, uint8_t dac_command, uint8_t dac_address, uint16_t dac_code)
Write the 16-bit dac_code to the LTC2636.
Definition: LTC2636.cpp:84
#define LTC2636_DAC_A
Definition: LTC2636.h:132
#define LTC2636_DAC_H
Definition: LTC2636.h:139
static void menu_4_update_power_up_dac(int16_t selected_dac)
Update DAC with data that is stored in input register, power up if sleeping.
Definition: DC1466.ino:262
#define LTC2636_DAC_G
Definition: LTC2636.h:138