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Topics - gnahzc

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TinyDuino Processors & TinyShields / dual motor tinyshield not working
« on: August 22, 2016, 03:19:01 PM »
I'm trying to test the dual motor tinyshield but unable to get it to work.

I have the base board, USB board and the dual motor board stacked up. I used the sample code from the tutorial here:

What I got is "Motor driver not detected!". I traced it to the I2C transaction. Using scope I can see the write to address 0x62 got a NAK. Any idea?

I'm sure my base board and usb board works because they work with the other IMU tinyshield without any problem. The dual motor shield is just out of box. I assume I don't need to connect external power if just for testing communication with the tiny841 through I2C. There's no motor connected either.

Could this simply be a bad board?

Thanks for help!

TinyDuino Processors & TinyShields / RTIMULib: SERIAL redefined?
« on: August 10, 2016, 09:39:48 PM »
I'm trying the 9-axis IMU shield with the RTIMULib example downloaded from your website.
It seems this code won't compile:

  #define SERIAL Serial

The error is:

TinyShield_9_Axis_Sensorboard.ino:58:0: warning: "SERIAL" redefined

Arduino.h:54:0: note: this is the location of the previous definition
 #define SERIAL  0x0

Looks like the symbol has been defined in Arduino.h. Can some one explain what the problem is and how to solve it?


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