In this article we look at the MMA7660 connected to a Chipkit MAx32
The MMA7660FC is a digital output I²C, very low-power, low-profile capacitive micro-machined accelerometer featuring a low pass filter, compensation for zero-g offset and gain errors and conversion to six-bit digital values at a user configurable output data rate. The device can be used for sensor data changes, product orientation and gesture detection through an interrupt pin (INT).
Communication is handled through a 2 pin I2C interface, available on a wide range of microcontrollers. The I2C address by default is 0x4c.
Features
Connection
- Pinout for Arduino UNO
- GND = GND
- VCC = 5v
- SDA = A4
- SCL = A5
Code
I used this library – https://github.com/mcauser/Grove-3Axis-Digital-Accelerometer-1.5g-MMA7660FC
[codesyntax lang=”cpp”]
#include <Wire.h>
#include "MMA7660.h"
MMA7660 acc;
void setup()
{
acc.init();
pinMode(13, OUTPUT);
Serial.begin(115200);
}
void loop()
{
static long cnt = 0;
static long cntout = 0;
float ax,ay,az;
int8_t x, y, z;
acc.getXYZ(&x,&y,&z);
Serial.print("x = ");
Serial.println(x);
Serial.print("y = ");
Serial.println(y);
Serial.print("z = ");
Serial.println(z);
if(acc.getAcceleration(&ax,&ay,&az))
{
Serial.print("get data ok: ");
}
else
{
Serial.print("tiem out: ");
}
Serial.println("accleration of X/Y/Z: ");
Serial.print(ax);
Serial.println(" g");
Serial.print(ay);
Serial.println(" g");
Serial.print(az);
Serial.println(" g");
Serial.println();
delay(50);
}
[/codesyntax]
Output
Open the serial monitor
get data ok: accleration of X/Y/Z:
-0.19 g
-1.29 g
0.24 g
x = -31
y = -32
z = 18
get data ok: accleration of X/Y/Z:
-1.48 g
-1.52 g
0.86 g
x = -8
y = -25
z = 12
get data ok: accleration of X/Y/Z:
-0.38 g
-1.19 g
0.57 g
x = -2
y = -28
z = 18
Link
https://www.nxp.com/docs/en/data-sheet/MMA7660FC.pdf
1PCS NEW MMA7660 Replace MMA7260 3 Axis Triaxial accelerometer sensor module
