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Member Since 15 Jan 2015
Offline Last Active Mar 24 2015 12:52 AM

Posts I've Made

In Topic: 3V3 to 5V SPI link

03 March 2015 - 09:41 PM

Mario, thanks for the response.



What is "GEP"?

Sorry... GEP in this context means 'Good Engineering Practices'.



As for what is supplied by the HC11, the Netduino (by means the MCU) is 5V tolerant so there's no problem.

As for what is supplied by the Netduino (3.3V), the "HC" voltage levels (68HC11) are able to recognize the logic high at 3V: again, no problem.

Sounds good.  I was hoping something simple like this could be done.



Question: why don't you use the UART? It's much more convenient if you want exchange data between MCUs...


Originally, I thought I might have a dual master SPI system where both the nd+ and the hc11 shared some SPI slave devices.  With both MCUs on SPI, it made sense to try to use it for communication between MCUs too.  But, because there's no slave mode on nd+ it doesn't sound like such a good idea now.


Thanks again for the help.



In Topic: ND+2 I2C with AT24C08D EEPROM

02 March 2015 - 02:49 AM

No luv from the nd+ team on this one?


So, fyi... I'm treating the chip as 4 individual, 256 byte eeproms with some extra code to deal with crossing boundary.  Not a perfect solution but at least the chip's useful for something. 

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