Pages: 1 [2]   Go Down
Author Topic: Multibyte SPI read with Dimitech 2820L Global Orientation Module  (Read 1582 times)
0 Members and 1 Guest are viewing this topic.
Miramar Beach, Florida
Offline Offline
Faraday Member
**
Karma: 116
Posts: 5393
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

...and explain how you are powering that module. If you are using the 3.3v bus on the Arduino, it may not provide enough current.

edit: Insure you have a good ground connection to the Arduino for all those devices.
« Last Edit: April 01, 2013, 05:03:22 am by SurferTim » Logged

0
Offline Offline
Newbie
*
Karma: 0
Posts: 21
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

The Logic Level Converters are these https://www.sparkfun.com/products/8745

I had buzzed out the connections high and low side, so I am pretty confident they are behaving normally.

The module is powered from the 5v bus on the arduino, however I have just checked the 3v3 max current draw an its 50mA max from the Arduino, however the specs show it can draw up to 69mA in active sensor mode. That also doesn't take into account the current drawn by the Level Converters either.

Looks like I will have to sort out a breadboard psu and a 3v3 arduino so I can stop using those level converters and clean up the wiring.

I suspect this project needs to be paused until the above are sourced. Thanks for all your help so far, I will keep everyone updated.


Logged

Earth
Offline Offline
Newbie
*
Karma: 0
Posts: 1
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

According to http://dimitech.com/?p=272 there is a new firmware for this module. The datasheet shows SPI mode 0 now (previous typo?). Level shifting is definitely needed for 5V boards. Maybe updating the firmware would help?
« Last Edit: April 20, 2013, 03:34:52 am by user256 » Logged

I am on a low-electron diet...

Pages: 1 [2]   Go Up
Jump to: