Hi.
I have tried looking for some answers and no solution found for my problem. I am running a Nextion 3.2" LCD with a Teensy 3.2, however I do not get any communication. I have tried using different Serial Ports however still no luck. Everything worked on my Arduino Nano and coppied the code exactly from the Nano to the Teensy using Teensyduino. I want to run specific voltages from a DAC and then measure with a ADC and display on the LCD. Can someone please help?
Code:
#include "Nextion.h" // Nextion Library
#include <Wire.h> // ADC Library
#include <Adafruit_ADS1015.h> // ADC Library
#include <PWM.h> // PWM Library
#include <SPI.h> // Serial Communication Library
#define PGA 1
#define VREF 2.048
#define VFSR VREF/PGA
#define FSR (((long int)1<<23)-1)
//#define DAC8574_ADD 0x98
#define DAC8574_ADD 0x4C // allowing for RW bit being added
#define DAC8574_CTR 0x34 // broadcast to all dac channels
// Choose the correct ADC
Adafruit_ADS1115 ads; /* Use this for the 16-bit version */
float adc0;
float adc1;
float adc2;
float adc3;
float differentialresult;
// After Multiplication
float adc0_new;
float adc1_new;
float adc2_new;
float adc3_new;
float differentialresult_new;
char buffer0[10] = {0}; // Buffer to display result
char buffer1[10] = {0}; // Buffer to display result
char buffer2[10] = {0}; // Buffer to display result
char buffer3[10] = {0}; // Buffer to display result
// DAC
volatile byte MSB;
volatile byte data;
volatile byte LSB;
//volatile char SPI_RX_Buff[3];
volatile byte *SPI_RX_Buff_Ptr;
byte val = 0;
unsigned int pwmvalue;
float pwmvoltage;
NexText Result0 = NexText(0,1,"Result0");
NexText Result1 = NexText(0,2,"Result1");
NexText Result2 = NexText(0,3,"Result2");
NexText Result3 = NexText(0,4,"Result3");
NexTouch *nex_listen_list[] =
{
&Result0,
&Result1,
&Result2,
&Result3,
NULL
};
void SetDACvoltage(unsigned int channel, float voltage) // Sub routine to pick the channel and the value to be sent
{
int DACCmd = 0; // Temp holder for DAC command
switch (channel)
{
case 0: DACCmd= 0x10; break; // Adress 0 selects Channel A - The first 1 is to set the value automatically on the output
case 1: DACCmd= 0x12; break; // Adress 2 selects Channel B - The first 1 is to set the value automatically on the output
case 2: DACCmd= 0x14; break; // Adress 4 selects Channel C - The first 1 is to set the value automatically on the output
case 3: DACCmd= 0x16; break; // Adress 6 selects Channel D - The first 1 is to set the value automatically on the output
default: break;
}
voltage = (voltage - 0.0042)/0.9998; // Calibration
pwmvoltage = ((voltage)/5)*65535; // Input voltage without offset value (0.01)
pwmvalue = (int) pwmvoltage;
Wire.beginTransmission(DAC8574_ADD); // transmit to device (address 0x98)
Wire.write(DACCmd); // This is the channel that is to be set (e.g. address 0x10)
Wire.write(pwmvalue >> 8); // Shift the 16 bit therefore send the first byte first (MSB)
Wire.write(pwmvalue); // Send LSB (The second byte) and ignores the upper half
Wire.endTransmission(); // Stop transmitting
}
void setup() {
// Initialize
nexInit(); // Initialize Nextion Display
Serial.begin(9600); // Start serial comunication at baud = 9600
ads.begin();
Wire.begin(DAC8574_ADD);
}
void loop() {
SetDACvoltage(0,0.362); // Set given voltage
SetDACvoltage(1,0.583); // Set given voltage
SetDACvoltage(2,1.275); // Set given voltage
SetDACvoltage(3,1.854); // Set given voltage
adc0 = ads.readADC_SingleEnded(0);
adc1 = ads.readADC_SingleEnded(1);
adc2 = ads.readADC_SingleEnded(2);
adc3 = ads.readADC_SingleEnded(3);
adc0_new = (adc0*0.1875)/1000;
adc1_new = (adc1*0.1875)/1000;
adc2_new = (adc2*0.1875)/1000;
adc3_new = (adc3*0.1875)/1000;
dtostrf(adc0_new, 7, 5, buffer0);
dtostrf(adc1_new, 7, 5, buffer1);
dtostrf(adc2_new, 7, 5, buffer2);
dtostrf(adc3_new, 7, 5, buffer3);
Result0.setText(buffer0); // From ButtonTest_1
Result1.setText(buffer1);
Result2.setText(buffer2);
Result3.setText(buffer3);
nexLoop(nex_listen_list); // Check for any touch event
}
After uploading, The Arduino IDE gives me these errors:
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexPage.cpp: In member function 'bool NexPage::show()':
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexPage.cpp:25:13: warning: unused variable 'buffer' [-Wunused-variable]
uint8_t buffer[4] = {0};
^
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexRtc.cpp: In member function 'bool NexRtc::write_rtc_time(char*)':
I have tried looking for some answers and no solution found for my problem. I am running a Nextion 3.2" LCD with a Teensy 3.2, however I do not get any communication. I have tried using different Serial Ports however still no luck. Everything worked on my Arduino Nano and coppied the code exactly from the Nano to the Teensy using Teensyduino. I want to run specific voltages from a DAC and then measure with a ADC and display on the LCD. Can someone please help?
Code:
#include "Nextion.h" // Nextion Library
#include <Wire.h> // ADC Library
#include <Adafruit_ADS1015.h> // ADC Library
#include <PWM.h> // PWM Library
#include <SPI.h> // Serial Communication Library
#define PGA 1
#define VREF 2.048
#define VFSR VREF/PGA
#define FSR (((long int)1<<23)-1)
//#define DAC8574_ADD 0x98
#define DAC8574_ADD 0x4C // allowing for RW bit being added
#define DAC8574_CTR 0x34 // broadcast to all dac channels
// Choose the correct ADC
Adafruit_ADS1115 ads; /* Use this for the 16-bit version */
float adc0;
float adc1;
float adc2;
float adc3;
float differentialresult;
// After Multiplication
float adc0_new;
float adc1_new;
float adc2_new;
float adc3_new;
float differentialresult_new;
char buffer0[10] = {0}; // Buffer to display result
char buffer1[10] = {0}; // Buffer to display result
char buffer2[10] = {0}; // Buffer to display result
char buffer3[10] = {0}; // Buffer to display result
// DAC
volatile byte MSB;
volatile byte data;
volatile byte LSB;
//volatile char SPI_RX_Buff[3];
volatile byte *SPI_RX_Buff_Ptr;
byte val = 0;
unsigned int pwmvalue;
float pwmvoltage;
NexText Result0 = NexText(0,1,"Result0");
NexText Result1 = NexText(0,2,"Result1");
NexText Result2 = NexText(0,3,"Result2");
NexText Result3 = NexText(0,4,"Result3");
NexTouch *nex_listen_list[] =
{
&Result0,
&Result1,
&Result2,
&Result3,
NULL
};
void SetDACvoltage(unsigned int channel, float voltage) // Sub routine to pick the channel and the value to be sent
{
int DACCmd = 0; // Temp holder for DAC command
switch (channel)
{
case 0: DACCmd= 0x10; break; // Adress 0 selects Channel A - The first 1 is to set the value automatically on the output
case 1: DACCmd= 0x12; break; // Adress 2 selects Channel B - The first 1 is to set the value automatically on the output
case 2: DACCmd= 0x14; break; // Adress 4 selects Channel C - The first 1 is to set the value automatically on the output
case 3: DACCmd= 0x16; break; // Adress 6 selects Channel D - The first 1 is to set the value automatically on the output
default: break;
}
voltage = (voltage - 0.0042)/0.9998; // Calibration
pwmvoltage = ((voltage)/5)*65535; // Input voltage without offset value (0.01)
pwmvalue = (int) pwmvoltage;
Wire.beginTransmission(DAC8574_ADD); // transmit to device (address 0x98)
Wire.write(DACCmd); // This is the channel that is to be set (e.g. address 0x10)
Wire.write(pwmvalue >> 8); // Shift the 16 bit therefore send the first byte first (MSB)
Wire.write(pwmvalue); // Send LSB (The second byte) and ignores the upper half
Wire.endTransmission(); // Stop transmitting
}
void setup() {
// Initialize
nexInit(); // Initialize Nextion Display
Serial.begin(9600); // Start serial comunication at baud = 9600
ads.begin();
Wire.begin(DAC8574_ADD);
}
void loop() {
SetDACvoltage(0,0.362); // Set given voltage
SetDACvoltage(1,0.583); // Set given voltage
SetDACvoltage(2,1.275); // Set given voltage
SetDACvoltage(3,1.854); // Set given voltage
adc0 = ads.readADC_SingleEnded(0);
adc1 = ads.readADC_SingleEnded(1);
adc2 = ads.readADC_SingleEnded(2);
adc3 = ads.readADC_SingleEnded(3);
adc0_new = (adc0*0.1875)/1000;
adc1_new = (adc1*0.1875)/1000;
adc2_new = (adc2*0.1875)/1000;
adc3_new = (adc3*0.1875)/1000;
dtostrf(adc0_new, 7, 5, buffer0);
dtostrf(adc1_new, 7, 5, buffer1);
dtostrf(adc2_new, 7, 5, buffer2);
dtostrf(adc3_new, 7, 5, buffer3);
Result0.setText(buffer0); // From ButtonTest_1
Result1.setText(buffer1);
Result2.setText(buffer2);
Result3.setText(buffer3);
nexLoop(nex_listen_list); // Check for any touch event
}
After uploading, The Arduino IDE gives me these errors:
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexPage.cpp: In member function 'bool NexPage::show()':
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexPage.cpp:25:13: warning: unused variable 'buffer' [-Wunused-variable]
uint8_t buffer[4] = {0};
^
C:\Program Files (x86)\Arduino\libraries\ITEADLIB_Arduino_Nextion-master\NexRtc.cpp: In member function 'bool NexRtc::write_rtc_time(char*)':
