Re: Performance of the accelerometer on FR
Thanks ... will check it out for sure On Sat, Oct 10, 2009 at 10:35 AM, RANJAN infi...@gmail.com wrote: Hi ranjan, I would like to have a look at your source code and try to figure out what needs to be done to Increase the performance. Can you tell me where can I look for the code, or can you mail me the code. What software have you used on the PC to make a graph?? Use OpenGl with some commands to read the serial port data. (see MSDN documentation if on windows).See wiki for accelerometer code. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
Hi ranjan, I would like to have a look at your source code and try to figure out what needs to be done to Increase the performance. Can you tell me where can I look for the code, or can you mail me the code. What software have you used on the PC to make a graph?? On Thu, Oct 1, 2009 at 7:04 PM, RANJAN infi...@gmail.com wrote: Freerunner uses the LIS302DL accelerometers from ST [1]. They can be switched between +-2g and +-8g range and have a resolution of 8 bit per axis. The sample rate can be selected between 100Hz and 400Hz. And they inherit some nice functions like double click detection and zero-g filtering. So can the selectivity be changed on the FR?And can the sample rate be changed as well?Even if one is able to change the sample rate can one read the values at the same frequency? Sriranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
Hi ranjan, I would like to have a look at your source code and try to figure out what needs to be done to Increase the performance. Can you tell me where can I look for the code, or can you mail me the code. What software have you used on the PC to make a graph?? Use OpenGl with some commands to read the serial port data. (see MSDN documentation if on windows).See wiki for accelerometer code. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
What are the accelerometers used in the FR (company and model number)?I think it might be Freescale's MMA7260.If it is it has selectable sensitivities in the range of +/- 1.5 g to 6 g what has been selected in the free runner.What I observed is that the Free runner is able to detect shocks as in if a person is running it will work well to detect such shocks.Also if one has to use it to shuffle songs it will work well. Freerunner uses the LIS302DL accelerometers from ST [1]. They can be switched between +-2g and +-8g range and have a resolution of 8 bit per axis. The sample rate can be selected between 100Hz and 400Hz. And they inherit some nice functions like double click detection and zero-g filtering. Ciao, Rainer [1] http://www.st.com/stonline/products/literature/ds/12726/lis302dl.pdf ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
On Thu, Oct 01, 2009 at 10:19:00AM +0530, RANJAN wrote: Hi, What are the accelerometers used in the FR (company and model number)?I think it might be Freescale's MMA7260. I have no idea why you think they might be Freescale MMA7260. The wiki[1] clearly says that they are LIS302DL from ST Microelectronics. [1] https://wiki.openmoko.org/wiki/Neo_FreeRunner_Hardware#Accelerometers -- Rask Ingemann Lambertsen Danish law requires addresses in e-mail to be logged and stored for a year ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
I have no idea why you think they might be Freescale MMA7260. The wiki[1] clearly says that they are LIS302DL from ST Microelectronics. [1] https://wiki.openmoko.org/wiki/Neo_FreeRunner_Hardware#Accelerometers Oh ok.Thanks.But can the sensitivities selection configurable and can the sample rate be changed?And what is the fastest way to read the accelerometer values.Also is 38400 bps the max baud rate of the bluetooth on FR? Sriranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
Freerunner uses the LIS302DL accelerometers from ST [1]. They can be switched between +-2g and +-8g range and have a resolution of 8 bit per axis. The sample rate can be selected between 100Hz and 400Hz. And they inherit some nice functions like double click detection and zero-g filtering. So can the selectivity be changed on the FR?And can the sample rate be changed as well?Even if one is able to change the sample rate can one read the values at the same frequency? Sriranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Performance of the accelerometer on FR
I have been testing the accelerometers on the free runner via bluetooth at 38400 bps.Here is my test video: http://www.youtube.com/watch?v=Bdads8XAYcEhttp://www.youtube.com/watch?v=Bdads8XAYcE I think at 38400 it is not pretty real time.What could be the maximum refresh rate of the accelerometers?And what is the best way to read this data.Is 38400 is the maximum speed that can be achieved with the bluetooth on FR? Anyone any idea? Sriranjan Hi, What are the accelerometers used in the FR (company and model number)?I think it might be Freescale's MMA7260.If it is it has selectable sensitivities in the range of +/- 1.5 g to 6 g what has been selected in the free runner.What I observed is that the Free runner is able to detect shocks as in if a person is running it will work well to detect such shocks.Also if one has to use it to shuffle songs it will work well. Please let me know. Thanks and Regards Sriranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
