Attiny 1614 and MMA8453_n0m1 library

Using Arduino Programming Questions
1

Hello,
I have an MMA8453 accelerometer and I made a code that works perfectly on an Arduino Nano 3 using MMA8453_n0m1.h library.
But now I need to use Attiny 1614 procesor...and I am haveing some problems whit proggraming Attiny 1614 procesor using MMA8453_n0m1.h library in code.
This is the error:

c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp: In member function 'void MMA8453_n0m1::setI2CAddr(int)':
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:58:21: warning: statement has no effect [-Wunused-value]
  I2CAddr = address; I2CAddr;
                     ^~~~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp: In member function 'void MMA8453_n0m1::clearInterrupt()':
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:124:22: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
     if(srcTrans&0x02 == 0x02)
                 ~~~~~^~~~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:128:22: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
     if(srcTrans&0x08 == 0x08)
                 ~~~~~^~~~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:132:22: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
     if(srcTrans&0x20 == 0x20)
                 ~~~~~^~~~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:141:13: warning: variable 'srcFF' set but not used [-Wunused-but-set-variable]
        byte srcFF;
             ^~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp: In member function 'void MMA8453_n0m1::xyz(int&, int&, int&)':
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:206:38: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
        x = buf[0] << 2 | buf[1] >> 6 & 0x3;
                          ~~~~~~~~~~~~^~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:207:38: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
        y = buf[2] << 2 | buf[3] >> 6 & 0x3;
                          ~~~~~~~~~~~~^~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:208:38: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
        z = buf[4] << 2 | buf[5] >> 6 & 0x3;
                          ~~~~~~~~~~~~^~~~~
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp: In function 'void accelISR()':
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:730:6: warning: 'accelISR' appears to be a misspelled 'signal' handler, missing '__vector' prefix [-Wmisspelled-isr]
 void accelISR(void){
      ^~~~~~~~
Compiling core...
Using precompiled core: C:\Users\mijat\AppData\Local\Temp\arduino\cores\5c54b9a6ae434ea86e3a422138f215c3\core.a
Linking everything together...
"C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-gcc" -Wall -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -Wl,--section-start=.text=0x0 -mrelax -mmcu=attiny1614 -o "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287\\sketch\\sketch_oct10a-test_motio_moda.ino.cpp.o" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287\\libraries\\Wire\\Wire.cpp.o" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287\\libraries\\Wire\\twi.c.o" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287\\libraries\\Wire\\twi_pins.c.o" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287\\libraries\\MMA8453_n0m1\\MMA8453_n0m1.cpp.o" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/..\\..\\cores\\5c54b9a6ae434ea86e3a422138f215c3\\core.a" "-LC:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287" -lm
In function 'accelISR':
c:\Users\mijat\Documents\Arduino\libraries\MMA8453_n0m1\MMA8453_n0m1.cpp:730:6: warning: 'accelISR' appears to be a misspelled 'signal' handler, missing '__vector' prefix [-Wmisspelled-isr]
 void accelISR(void"C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-objcopy" -O binary -R .eeprom "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.bin"
){
      ^
"C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.eep"
"C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.hex"
cmd /C echo. && "C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-objdump" --disassemble --source --line-numbers --demangle --section=.text "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" > "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.lst"
 
cmd /C echo. && "C:\\Users\\mijat\\AppData\\Local\\Arduino15\\packages\\DxCore\\tools\\avr-gcc\\7.3.0-atmel3.6.1-azduino6/bin/avr-nm" --numeric-sort --line-numbers --demangle --print-size --format=s "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.elf" > "C:\\Users\\mijat\\AppData\\Local\\Temp\\arduino\\sketches\\68F94FB98ECA067816B1E900D155B287/sketch_oct10a-test_motio_moda.ino.map"
2

This library seems to use pin change interrupts, via "attachinterrupt", and the Attiny1614 is not among the supported processors.

3

Do you maybe have any suggestion what library to use?

4

Not familiar with your sensor. You could give the Adafruit library a try.

5

I just had a quick look at: GitHub - n0m1/MMA8453_n0m1: an Arduino Library for the Freescale MMA8453Q & MMA8452Q Accelerometer

MMA8453_n0m1.h contains this construct:
extern "C" void accelISR(void) __attribute__ ((signal));

Try changing it to just:
extern "C" void accelISR(void);

There is also a potential mess in this sort of construct from the corresponding .cpp which assumes that the edge triggered interrupts are pins 2 and 3 which may not be the case with the ATtiny1614. These instances may have to be tidied up:

void MMA8453_n0m1::shakeMode(int threshold, boolean enableX, boolean enableY, boolean enableZ, boolean enableINT2,int arduinoINTPin)
{
	 if(arduinoINTPin == 2 || arduinoINTPin == 3)
	 {
		arduinoINTPin = arduinoINTPin - 2;
		attachInterrupt(arduinoINTPin,accelISR,FALLING); 
		//DataSheet pg40, When IPOL is ‘0’ (default value) any interrupt event will signaled with a logical 0
	 }
	
	 else
	 {	
		 #ifdef PINCHANGE_INT
		 	pinMode(arduinoINTPin, INPUT); digitalWrite(arduinoINTPin, HIGH);
		 	PCintPort::attachInterrupt(arduinoINTPin,accelISR,FALLING);  
		 #else
		 	Serial.println("no INT on pin, define PINCHANGE_INT");	
		 #endif
	 }
. . .
. . .
6

I made it work :grinning: :grinning: :grinning: without using the library

#include <Wire.h>

#define MMA8451_ADDRESS 0x1C // I2C address for MMA8451 sensor
#define REG_OUT_X_MSB 0x01   // Register address for X-axis data

void setup() {
  Serial.begin(9600);
  Wire.begin();
  
  // Initialize MMA8451
  writeToRegister(MMA8451_ADDRESS, 0x2A, 0x01); // Set ACTIVE mode
  writeToRegister(MMA8451_ADDRESS, 0x0E, 0x00); // Set range to +/-2g
}

void loop() {
// Read accelerometer data for X, Y, and Z axes
  int16_t xAccel = readFromRegister(MMA8451_ADDRESS, REG_OUT_X_MSB);
  int16_t yAccel = readFromRegister(MMA8451_ADDRESS, REG_OUT_X_MSB + 2);
  int16_t zAccel = readFromRegister(MMA8451_ADDRESS, REG_OUT_X_MSB + 4);
  
  // Convert raw data to acceleration in g
  float xAcceleration = xAccel / 1024.0; // Assuming +/-2g range
  float yAcceleration = yAccel / 1024.0;
  float zAcceleration = zAccel / 1024.0;
  
  // Print the results
  Serial.print("X: ");
  Serial.println(xAcceleration, 4); // 4 decimal places
 

  Serial.print("Y: ");
  Serial.println(yAcceleration, 4);


  Serial.print("Z: ");
  Serial.println(zAcceleration, 4);
  

  delay(500); // Adjust the delay for your desired sampling rate
}

void writeToRegister(uint8_t deviceAddress, uint8_t registerAddress, uint8_t data) {
  Wire.beginTransmission(deviceAddress);
  Wire.write(registerAddress);
  Wire.write(data);
  Wire.endTransmission();
}

int16_t readFromRegister(uint8_t deviceAddress, uint8_t registerAddress) {
  Wire.beginTransmission(deviceAddress);
  Wire.write(registerAddress);
  Wire.endTransmission(false);
  
  Wire.requestFrom(deviceAddress, 2);
  int16_t value = (Wire.read() << 8) | Wire.read();
  
  return value;
}
7

Great. It is even better if you can solve such problems without using a library. You can mark your post as a solution and maybe it helps someone else.

8

That's an awful lot of warnings for a library you want to trust, and those particular x&bit == bit checks actually look wrong... (== has higher precedence than &, so they all evaluate to x&1, essentially.)

9

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