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Socket 5 - 8

Started by iandi, May 01 2012 09:31 PM

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6 replies to this topic

#1 iandi

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Posted 01 May 2012 - 09:31 PM

Dear All, I would like to know how I can send/receive serial data via Pins 4,5 of one of the sockets 5 - 8? Best wishes and many thanks Andi

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#2 Chris Walker

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Posted 02 May 2012 - 04:54 AM

Hi Andi,

I would like to know how I can send/receive serial data via Pins 4,5 of one of the sockets 5 - 8?

If you'd like to use the serial TX/RX pins of sockets 5-8 (and not use go!bus modules on those sockets), just open up serial port "COM2" using NETMF's SerialPort object.

COM1 matches sockets 1-4. COM2 matches sockets 5-8.

Chris

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#3 iandi

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Posted 03 May 2012 - 08:22 AM

Hi Chris, many thanks for your quick reply! Ive created the port, but Im not sure whether the blue LED next to the socket (5) should be on ;-) Maybe Im mistaken and should activate the socket?! Please let me know. Best wishes Andi

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#4 Chris Walker

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Posted 03 May 2012 - 10:13 AM

Hi Andi,

Ive created the port, but Im not sure whether the blue LED next to the socket (5) should be on ;-) Maybe Im mistaken and should activate the socket?!

The blue LEDs are only activated when go!bus modules are enumerated. We'll expose some classes/methods to let you turn these on and off (as well as dim them) in an upcoming firmware update.

Chris

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#5 iandi

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Posted 08 May 2012 - 10:52 AM

Hi Chris, quick questions: I have programmed and wired everything so far. I'm trying to connect RX and TX to RS485 directly, do you think this would work? If not, using a TTL to RS485 converter, would I have to use the RTS line of the converter or would it be sufficient to connect to RX, TX, GND, VCC? And if so, could you please recommend which PIN I should use? Best wishes Andi

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#6 Chris Walker

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LocationNew York, NY

Posted 08 May 2012 - 11:22 AM

Hi Andi,

I have programmed and wired everything so far. I'm trying to connect RX and TX to RS485 directly, do you think this would work?

If not, using a TTL to RS485 converter, would I have to use the RTS line of the converter or would it be sufficient to connect to RX, TX, GND, VCC? And if so, could you please recommend which PIN I should use?

The UART exposed in the sockets is a TTL UART with RX/TX pins (no RTS or flow control). If you want to hack directly into the sockets, your best bet is to either use a TTL-RS485 adapter or possibly to use a SPI-RS485 converter.

We'll also have a UART with flow control working on the Shield Base soon...if you want to wait for that, you can plug into TX/RX and RTS directly there at TTL (not RS485) levels.

Chris