When I call <Adafruit_ADS1115 object>.begin(); my program running on arduino hangs. Any direction or advice?

Projects General Guidance
1

I'm trying to read a voltage with an ADS1115 adc, and the <Adafruit_ADS1X15.h> library.
I based my code off this tutorial:

I put a comment in the code where the programs hang.

#include <ACAN2515.h>
#include <Wire.h>
#include <Adafruit_ADS1X15.h>

Adafruit_ADS1115 ads;
const float multiplier = .1875;

static const byte MCP2515_CS  = 10 ; // CS input of MCP2515 (adapt to your design) 
static const byte MCP2515_INT =  3 ; // INT output of MCP2515 (adapt to your design)

ACAN2515 can (MCP2515_CS, SPI, MCP2515_INT) ;                   ///KS - The CAN driver object
void interuptServiceRoutine(){ can.isr();}

static const uint32_t QUARTZ_FREQUENCY = 8UL * 1000UL * 1000UL ; //KS - Sets Clock Frequency Variable to pass into configuration object
static const uint32_t CAN_BAUDRATE = 500UL * 1000UL;  //KS - Sets the baudrate variable that will be passed into settings object constructor

CANMessage frame;

void setup() {  
  Serial.begin(9600);
  Serial.println("A");
  
  //setup the frame
  frame.id = 0xCC;
  Serial.println("B");

  frame.len = 2;

  //Start SPI
  SPI.begin();
  Serial.println("C");
  ads.begin();               ///<-------------------------------    it stalls here

  Serial.println("boop");
  //Configure ACAN2515
  ACAN2515Settings settings (QUARTZ_FREQUENCY, CAN_BAUDRATE) ; //KS - CAN bit rate 125 kb/s  and creating the configuration object
  const uint16_t errorCode = can.begin (settings, interuptServiceRoutine);                     ///KS - Just Configuring the Driver
  if(errorCode) { Serial.print ("Configuration error 0x") ; Serial.println (errorCode, HEX) ; } else Serial.println("CAN Transmitter Driver Configured");
}

void loop() {
  int16_t adc0=ads.readADC_SingleEnded(0);
  Serial.println(adc0*multiplier);

  int16_t a=adc0;
  int16_t b=adc0<<8;
  frame.data[0]=b>>8;
  frame.data[1]=a>>8;
  //can.tryToSend(frame);
}
2

Also, did I format my code right? It said to put multiple line code in between '''s.

3

Please reread the forum rules and edit your post, inserting the code in the code tags.

And about the code - I don't see the line in the code what you mentioned in message title

4
5

So you include Wire, but dont use Wire, however use SPI but do not include SPI? hmmm

6

Use back tics instead. Or in the post editor, use the "</>" code tag button.

1 Like
7

I'm guessing the Adafruit library uses them?

8

How does the post look now?

9

Make sure the ADX1115 works with the examples provided by the library, before trying or modifying someone else's code.

1 Like
10

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