Thanks, I'll give that a shot.

So what I have so far is basically just the accelerometer demo code, then i deleted the Y,Z and temp Serial.print functions.

I don't know how to take the X coordinate G-force reading from the serial port and give the output to the LEDs on the 16 LED shield.
(I'm new to arduino programming,and really need this for a project of mine)

I would really appreciate any help/advice anyone could give.

Thanks,
Ben

Here's the code i have so far:

Code Select Expand


#include <Wire.h>

#define BMA250_I2CADDR      0x18
#define BMA250_RANGE        0x03   // 0x03 = 2g, 0x05 = 4g, 0x08 = 8g, 0x0C = 16g
#define BMA250_BW           0x08   // 7.81Hz (update time of 64ms)

int AccelX;
int AccelY;
int AccelZ;
float AccelTemperature;

void setup()
{
  Wire.begin();
  Serial.begin(9600);
  BMA250Init();
}


void loop()
{
  BMA250ReadAccel();

  // Print out the accelerometer data
  Serial.print("x: ");
  Serial.print(AccelX);
   
   delay(100);
}


void BMA250Init()
{
  // Setup the range measurement setting
  Wire.beginTransmission(BMA250_I2CADDR);
  Wire.write(0x0F);
  Wire.write(BMA250_RANGE);
  Wire.endTransmission();
 
  // Setup the bandwidth
  Wire.beginTransmission(BMA250_I2CADDR);
  Wire.write(0x10);
  Wire.write(BMA250_BW);
  Wire.endTransmission();
}


int BMA250ReadAccel()
{
  uint8_t ReadBuff[8];
 
  // Read the 7 data bytes from the BMA250
  Wire.beginTransmission(BMA250_I2CADDR);
  Wire.write(0x02);
  Wire.endTransmission();
  Wire.requestFrom(BMA250_I2CADDR,7);
 
  for(int i = 0; i < 7;i++)
  {
    ReadBuff[i] = Wire.read();
  }
 
  AccelX = ReadBuff[1] << 8;
  AccelX |= ReadBuff[0];
  AccelX >>= 6;
 
  AccelY = ReadBuff[3] << 8;
  AccelY |= ReadBuff[2];
  AccelY >>= 6;
 
  AccelZ = ReadBuff[5] << 8;
  AccelZ |= ReadBuff[4];
  AccelZ >>= 6; 

  AccelTemperature = (ReadBuff[6] * 0.5) + 24.0;
}


Hello,
I'm trying to get the LEDs on my 16 LED tinyshield to light up and display roughly how many Gs my Accelerometer tinyshield is outputing...e.g. (If the accelerometer registers 2.5 Gs in the Y plane then 6 of the 16 LEDs would light up, 1 for every .25 Gs)

I'm new to programming arduinos so any help showing what the code would look like to get this to work would be very appreciated.

Hello,
I'm trying to get the LEDs on my 16 LED tinyshield to light up and display roughly how many Gs my Accelerometer tinyshield is outputing...e.g. (If the accelerometer registers 2.5 Gs in the Y plane then 6 of the 16 LEDs would light up, 1 for every .25 Gs)

I'm new to programming arduinos so any help showing what the code would look like to get this to work would be very appreciated.

This is how I was thinking they would be...Just your standard 10 segment LED bar graph shrunk down to fit within the 20mm x 20mm Tinyduino profile.

(I know I could just swap different colored LEDs on the LED shield, but I have projects that would be a lot better with Liner LEDS instead of Rotary)

Here's a link to a sketch I drew, the file was to big to upload:/
=137216718&filters[recent]=1&sort=1&o=0]
http://s1276.photobucket.com/user/Ben1342/media/10segmentledshield_zpsfcab9c83.jpg.html?filters[user]=137216718&filters[recent]=1&sort=1&o=0

I think a 10 segment LED bar graph with multi-colored LEDs (Imagine the first 5 LEDs are green, the next 3 are yellow and the last 2 are red) would be a great shield.
It would be a great output display for microphones, touch sensors, accelerometers, etc..

I could definitely use this. +1 vote

If you were to add IR LEDs around the outside edge of a dirt cheap IR camera you would get a decent night-vision Pic/Video...More IR leds = better(brighter) night-vision.

(might be pointing out the obvious here :/)