Automotive Datalogger

Created Wed, 07 Mar 2012 22:54:50 +0000 by scoprire

scoprire

Wed, 07 Mar 2012 22:54:50 +0000

HI,i'm a newbie, I would like to create a datalogger for a motorbike, i would like to use ChipKit Max32 and

• Grove Mega Shield (visible on seedstudio)
• 6 sensor for tyre temperature MLX90614ESF-ACC
• GPS U-Blox Neo-6M GPS module by seedstudio(dot)com
• 2 sensor for dumper extension SHARP GP2D120XJ00F
• 2 IR emitters/detectors for the speed of weels
• Sensor for RPM based on the TA12-200 by seedstudio(dot)com
• Accelerometer based on MMA7660FC with Digital Output I2C by seedstudio(dot)com
• Gyro LY530ALH by ST Microelectronics
• OpenLog for save on SD Is possible? Thanks a lot

scoprire

Thu, 15 Mar 2012 15:50:59 +0000

70 reads and no one response me? initially i've think to do this with arduino but in his forum someone told me that's arduino it's too slow.. it's chipkit fast enough?

Ryan K

Thu, 22 Mar 2012 20:06:29 +0000

Hello,

Chipkit is indeed faster than Arduino, it has a 80MHz clock but in order to answer your question it would involve knowing how fast you would need to refresh or capture the data from there you should be able to do some rough calculations to figure out if you can accomplish this.

Best Regards, Ryan K

scoprire

Thu, 22 Mar 2012 21:26:04 +0000

I'd like to caputure the data at last every second, better 2 time at second..

Ryan K

Thu, 22 Mar 2012 23:45:43 +0000

Hello,

Every second sounds pretty reasonable. It depends on the communication capabilities of your devices, how fast you can run the I2C and SPI at. You should do some hand calculations to see how many cycles, roughly, it would take to access all your devices.

Best Regards, Ryan K

scoprire

Fri, 23 Mar 2012 00:00:09 +0000

openlog run from 2400 to 115200bps

scoprire

Mon, 26 Mar 2012 11:22:11 +0000

someone can let me know the time needed for the read of this sensor? http://www.futureelectronics.com/en/technologies/semiconductors/analog/sensors/temperature/Pages/6266423-MLX90614ESF-AAA.aspx?IM=0

EmbeddedMan

Mon, 26 Mar 2012 15:29:42 +0000

Are you going to use it in I2C or PWM mode? If I2C, then the time to read it would be however long 100Khz I2C takes to send the command to read the value and then receive the value.

*Brian

scoprire

Mon, 26 Mar 2012 15:39:12 +0000

if i use PWM the time is near 1second, i2c how many time needed?

EmbeddedMan

Mon, 26 Mar 2012 17:40:16 +0000

Well, the time to actually read out the value will be much, much shorter than that. However, the time it take for the sensor to accurately read will probably not change based upon communication mode. So I'd say still probably 1 second.

*Brian

EmbeddedMan

Mon, 26 Mar 2012 17:42:59 +0000

I was wrong. In reading the data sheet in more detail, it looks like you can poll the device over I2C as fast as you want for new readings. The PWM is really, really slow (1 or 2 second PWM period), so I'd go I2C. You should be able to read it many times per second that way.

*Brian

scoprire

Mon, 26 Mar 2012 21:04:03 +0000

thanks a lot, i'v order today chipkit and the sensor, i will keep you informed

Meecrow

Thu, 26 Apr 2012 02:30:55 +0000

Thanks kitkat & dan kauye,

OK. Now that the AUTOMOTIVE Board is created, I am going to move this topic to that board. Lets meet up there.

GordonP

Thu, 10 May 2012 12:59:22 +0000

Where can I find the AUTOMOTIVE board?

scoprire

Thu, 10 May 2012 17:52:24 +0000

i still creating the board, it's not yet complete.. I've some trouble with IR temperature sensor and now i use other sensor and i had to create an amplification circuit other developments will be add on the forum