I made a code that is able to make the z axis work but I need some help on
how to make it work for the x and y as well.Anyone familiar with python?
Please let me know how I can modify the code for the X and Y axis. Here's
the sample code:
import smbus
import time
def main():
bus = smbus.SMBus(1)
# Power-on the accelerometer, enabling only the z-axis
bus.write_byte_data(0x18, 0x20, 0x24)
try:
while True:
# get z-axis acceleration
tilt = bus.read_byte_data(0x18, 0x2D)
# if it's supposed to be negative
if tilt > 127:
# then convert it to the absolute value of the negative value
tilt = 256 + ~tilt
positive = False
else:
positive = True
# format and print it
pos = tilt / 2
print str(tilt).rjust(6),
if positive:
print 65*' ' + '|' + (pos*'#').ljust(65)
else:
print (pos*'#').rjust(65) + '|' + 65*' '
# sleep
time.sleep(0.1)
except KeyboardInterrupt:
# restore default settings
bus.write_byte_data(0x18, 0x20, 0x07)
if __name__ == '__main__':
main()
On Sat, Nov 16, 2013 at 1:46 AM, Zain Dar <[email protected]> wrote:
> Does anyone know how to make a code for measuring the digital
> accelerometers in i2c for the BBB? I've been looking for examples on making
> the X, Y, and Z axis work but I haven't had much luck and I'm running out
> of time since I need to check my progress on Mon. Any kind of hint will do
> fine, but it needs to involve measuring the waveforms for them too. Much
> appreciated.
>
>
> On Wed, Nov 13, 2013 at 5:21 AM, Mike Bremford <[email protected]> wrote:
>
>> I wouldn't receommend asking me anything to do with analog or python :-)
>> But the Linux I2C interface is easy, and Adafruit seems to be a good place
>> to start:
>> http://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/overview
>>
>>
>> On 13 November 2013 02:47, Zain Dar <[email protected]> wrote:
>>
>>> Well, I have 4 analog accelerometers (Sparkfun MMA7361L) and 2 digital
>>> (Sparkfun ADXL345).
>>>
>>>
>>> On Tue, Nov 12, 2013 at 9:18 PM, Tom King <[email protected]> wrote:
>>>
>>>> some with python, only strain guages ....which accelerometers are you
>>>> thinking about?
>>>>
>>>>
>>>> On Tue, Nov 12, 2013 at 3:50 PM, Zain Dar <[email protected]> wrote:
>>>>
>>>>> Hi Tom! thanks for the interest in my project! Do you have any
>>>>> experience with python and accelerometers?
>>>>>
>>>>>
>>>>> On Tue, Nov 12, 2013 at 6:47 PM, Tom King <[email protected]> wrote:
>>>>>
>>>>>> I'm a candidate for your Knee Brace...so I am interested
>>>>>>
>>>>>> Tom
>>>>>>
>>>>>>
>>>>>> On Mon, Nov 4, 2013 at 8:52 PM, Zain Dar <[email protected]> wrote:
>>>>>>
>>>>>>> Hello, I'm working on a college project and my task is to develop a
>>>>>>> software code for a knee brace, that has 6 accelerometers planted on the
>>>>>>> frame (4 Analog Accelerometers and 2 Digital Accelerometers). The Analog
>>>>>>> accelerometers have 3 axis of dimensions, X, Y, & Z, whereas the Digital
>>>>>>> accelerometers have two interrupts (INT0 and INT1), an SDA, an SCL, a
>>>>>>> 3.3V
>>>>>>> ref and a GND. I need to program the BBB to turn on the designated pins
>>>>>>> on
>>>>>>> the expansion slots for the ref voltage (P8 & P9 respectively), and for
>>>>>>> the
>>>>>>> reading of the accelerometers on the computer screen. After that I need
>>>>>>> to
>>>>>>> store the data from the accelerometers to an SD card. The main issue for
>>>>>>> this is that I'm not very good at programming, especially for the BBB
>>>>>>> since
>>>>>>> I haven't worked on it before, so is there any examples or tutorials on
>>>>>>> how
>>>>>>> I can make the software code from scratch or by putting different kinds
>>>>>>> of
>>>>>>> code together to make it work? Or is there any one who knows how to
>>>>>>> turn on
>>>>>>> any pin on the BBB and read the accelerometers from the expansion
>>>>>>> slots? I
>>>>>>> appreciate anyone who helps me out on this as it is a challenging step
>>>>>>> for
>>>>>>> me in. Any advice is appreciated,
>>>>>>>
>>>>>>> Thank you!
>>>>>>>
>>>>>>> --
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