141 Serial.begin(115200);
146 Serial.print(F(
"Checking for string variation\n"));
166 uint8_t acknowledge = 0;
169 if (Serial.available())
172 if (user_command !=
'm')
173 Serial.println(user_command);
174 switch (user_command)
186 Serial.println(
"Incorrect Option");
190 Serial.println(F(
"***** SPI ERROR ******"));
191 Serial.print(F(
"\n*************************\n"));
210 Serial.print(F(
"*************************\n\n"));
211 Serial.print(F(
"0-CH0 8-CH8\n"));
212 Serial.print(F(
"1-CH1 9-CH9\n"));
213 Serial.print(F(
"2-CH2 10-CH10\n"));
214 Serial.print(F(
"3-CH3 11-CH11\n"));
215 Serial.print(F(
"4-CH4 12-CH12\n"));
216 Serial.print(F(
"5-CH5 13-CH13\n"));
217 Serial.print(F(
"6-CH6 14-CH14\n"));
218 Serial.print(F(
"7-CH7 15-CH15\n"));
219 Serial.print(F(
"16-ALL\n"));
220 Serial.print(F(
"m-Main Menu\n"));
221 Serial.print(F(
"\nEnter a Command: "));
223 if (user_command ==
'm')
226 Serial.println(user_command);
229 if (user_command == 16)
231 Serial.print(F(
"ALL\n"));
238 for (int8_t
x = 0;
x < 15;
x++)
245 Serial.print(F(
" ****"));
246 Serial.print(F(
"CH"));
248 Serial.print(F(
": "));
249 Serial.print(adc_voltage, 4);
250 Serial.print(F(
"V\n"));
253 else if (user_command !=
'm')
256 Serial.print(F(
"\nADC Command: B"));
257 Serial.println(adc_command, BIN);
264 Serial.print(F(
"Received Code: 0x"));
265 Serial.println(adc_code, HEX);
267 Serial.print(F(
" ****"));
268 Serial.print(F(
"CH"));
269 Serial.print(user_command);
270 Serial.print(F(
": "));
271 Serial.print(adc_voltage, 4);
272 Serial.print(F(
"V\n"));
290 Serial.print(F(
"\n*************************\n\n"));
291 Serial.print(F(
"0-0P-1N 8-1P-0N\n"));
292 Serial.print(F(
"1-2P-3N 9-3P-2N\n"));
293 Serial.print(F(
"2-4P-5N 10-5P-4N\n"));
294 Serial.print(F(
"3-6P-7N 11-7P-6N\n"));
295 Serial.print(F(
"4-8P-9N 12-9P-8N\n"));
296 Serial.print(F(
"5-10P-11N 13-11P-10N\n"));
297 Serial.print(F(
"6-12P_13N 14-13P-12N\n"));
298 Serial.print(F(
"7-14P-15N 15-15P-14N\n"));
299 Serial.print(F(
"16-ALL Even_P-Odd_N\n"));
300 Serial.print(F(
"17-ALL Odd_P-Even_N\n"));
301 Serial.print(F(
"m-Main Menu\n"));
302 Serial.print(F(
"\nEnter a Command: "));
304 if (user_command ==
'm')
306 Serial.println(user_command);
309 if ((user_command == 16) || (user_command == 17))
311 if (user_command == 16)
313 Serial.print(F(
"ALL Even_P-Odd_N\n"));
316 if (user_command == 17)
318 Serial.print(F(
"ALL Odd_P-Even_N\n"));
325 for (int8_t
x = 0;
x <= 7;
x++)
333 Serial.print(F(
" ****"));
335 Serial.print(F(
": "));
336 Serial.print(adc_voltage, 4);
337 Serial.print(F(
"V\n"));
344 Serial.print(F(
"ADC Command: B"));
345 Serial.println(adc_command, BIN);
352 Serial.print(F(
"Received Code: 0x"));
353 Serial.println(adc_code, HEX);
356 Serial.print(F(
" ****"));
357 Serial.print(F(
"CH"));
358 Serial.print(user_command);
359 Serial.print(F(
": "));
360 Serial.print(adc_voltage, 4);
361 Serial.print(F(
"V"));
379 Serial.println(
"Apply 100mV to CH0 with respect to COM");
380 Serial.println(
"or apply a voltage greater than GND for the");
381 Serial.println(
"lower point in two point calibration");
382 Serial.print(
"Enter the measured input voltage:");
384 Serial.println(zero_voltage,4);
394 Serial.println(
"Apply ~2.40V input voltage to CH0");
395 Serial.println(
"or apply a voltage greater that first");
396 Serial.println(
"voltage and less than 2.40V.");
397 Serial.print(
"Enter the measured input voltage: ");
400 Serial.println(fs_voltage, 4);
411 Serial.print(
"ADC offset : ");
413 Serial.print(
"ADC lsb : ");
415 Serial.println(
"nV (32-bits)");
423 Serial.print(F(
"\n*****************************************************************\n"));
424 Serial.print(F(
"* DC571A Demonstration Program *\n"));
425 Serial.print(F(
"* *\n"));
426 Serial.print(F(
"* This program demonstrates how to send data and receive data *\n"));
427 Serial.print(F(
"* from the 24-bit ADC. *\n"));
428 Serial.print(F(
"* *\n"));
429 Serial.print(F(
"* Set the baud rate to 115200 and select the newline terminator.*\n"));
430 Serial.print(F(
"* *\n"));
431 Serial.print(F(
"*****************************************************************\n"));
437 Serial.print(F(
"\n1-Read Single-Ended\n"));
438 Serial.print(F(
"2-Read Differential\n"));
439 Serial.print(F(
"3-Calibration\n"));
441 Serial.print(F(
"Enter a command:"));
452 Serial.print(
"0P-1N");
455 Serial.print(
"2P-3N");
458 Serial.print(
"4P-5N");
461 Serial.print(
"6P-7N");
464 Serial.print(
"8P-9N");
467 Serial.print(
"10P-11N");
470 Serial.print(
"12P-13N");
473 Serial.print(
"14P-15N");
476 Serial.print(
"1P-0N");
479 Serial.print(
"3P-2N");
482 Serial.print(
"5P-4N");
485 Serial.print(
"7P-6N");
488 Serial.print(
"9P-8N");
491 Serial.print(
"11P-10N");
494 Serial.print(
"13P-12N");
497 Serial.print(
"15P-14N");
510 Serial.println(
"Calibration Stored to EEPROM");
525 Serial.println(
"Calibration Restored");
530 Serial.println(
"Calibration not found");
uint8_t eeprom_read_int16(uint8_t i2c_address, int16_t *read_data, uint16_t address)
Read the two byte integer data from the EEPROM starting at address.
unsigned char user_command
static uint8_t adc_command
#define EEPROM_I2C_ADDRESS
static void setup()
Initialize Linduino.
static int32_t LTC2418_offset_code
Ideal offset for a perfect part.
void LTC2418_cal_voltage(int32_t zero_code, int32_t fs_code, float zero_voltage, float fs_voltage, float *LTC2418_lsb, int32_t *LTC2418_offset_code)
Calibrate the lsb.
Header File for Linduino Libraries and Demo Code.
#define LTC2418_CS
Define the SPI CS pin.
uint8_t eeprom_read_float(uint8_t i2c_address, float *read_data, uint16_t address)
Read the four byte float data from the EEPROM starting at address.
uint8_t eeprom_write_int32(uint8_t i2c_address, int32_t write_data, uint16_t address)
Write the 4 byte long data to the EEPROM starting at address.
const uint8_t BUILD_COMMAND_SINGLE_ENDED[16]
Lookup table to build the command for single-ended mode channels.
static int8_t menu_2_read_differential()
Read channels in differential mode.
uint8_t eeprom_write_float(uint8_t i2c_address, float write_data, uint16_t address)
Write the 4 byte float data to the EEPROM starting at address.
static float LTC2418_lsb
Ideal LSB voltage for a perfect part.
uint8_t eeprom_write_int16(uint8_t i2c_address, int16_t write_data, uint16_t address)
Write the 2 byte integer data to the EEPROM starting at address.
LTC2418: 16-Channel 24-Bit No Latency Delta-Sigma ADC.
static void print_title()
Prints the title block when program first starts.
void quikeval_SPI_init(void)
Configure the SPI port for 4Mhz SCK.
static int8_t menu_1_read_single_ended()
Read channels in single-ended mode.
static void print_prompt()
Prints main menu.
#define EEPROM_CAL_STATUS_ADDRESS
float LTC2418_code_to_voltage(int32_t adc_code, float LTC2418_lsb, int32_t LTC2418_offset_code)
Calculates the LTC2418 input bipolar voltage.
int8_t discover_demo_board(char *demo_name)
Read the ID string from the EEPROM and determine if the correct board is connected.
LT_SPI: Routines to communicate with ATmega328P's hardware SPI port.
static int8_t menu_3_calibrate()
Calibrate ADC given two known inputs.
static uint8_t demo_board_connected
Set to 1 if the board is connected.
static int8_t restore_calibration()
Read stored calibration parameters from nonvolatile EEPROM on demo board.
int8_t LTC2418_EOC_timeout(uint8_t cs, uint16_t miso_timeout)
Checks for EOC with a specified timeout.
LT_I2C: Routines to communicate with ATmega328P's hardware I2C port.
static void loop()
Repeats Linduino loop.
char demo_name[]
Demo Board Name stored in QuikEval EEPROM.
void quikeval_SPI_connect()
Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C...
uint8_t eeprom_read_int32(uint8_t i2c_address, int32_t *read_data, uint16_t address)
Read the four byte long data from the EEPROM starting at address.
static void print_user_command(uint8_t menu)
Display selected differential channels.
const uint8_t BUILD_COMMAND_DIFF[16]
Lookup table to build the command for differential mode channels.
void quikeval_I2C_init(void)
Initializes Linduino I2C port.
const uint16_t MISO_TIMEOUT
The MISO timeout (ms)
static void store_calibration()
Store measured calibration parameters to nonvolatile EEPROM on demo board.
void LTC2418_read(uint8_t cs, uint8_t adc_command, uint32_t *adc_code)
Reads the LTC2418 result and programs the configuration for the next conversion.