Serial port

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Krauts In Space
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Serial port

Post by Krauts In Space »

On the PCB are hole for a serial port (TX/RX/GND).
I'm pretty sure this is or was for development reasons and/or installing a boot loader.
Anyone tried this out, soldering pins and connecting with a PC?
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toml_12953
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Re: Serial port

Post by toml_12953 »

Krauts In Space wrote:
Mon Feb 19, 2018 1:01 pm
On the PCB are hole for a serial port (TX/RX/GND).
I'm pretty sure this is or was for development reasons and/or installing a boot loader.
Anyone tried this out, soldering pins and connecting with a PC?
The levels are probably TTL rather than true RS-232 levels. If you connect a TTL serial port to it (even if you use a TTL to RS-232 converter), there's no support in firmware so how would you use it?
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Thomas Okken
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Re: Serial port

Post by Thomas Okken »

Michael told me they use JTAG for debugging. Could be those holes are for that, but I'm not sure. I just took a look at the board in my (beta) DM42, and I see no holes labeled TX or RX there, but there are four with names starting with JT.

We'll find out when they release the DM42 development tools, which I believe will happen in the not too distant future.
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Walter
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Re: Serial port

Post by Walter »

Thomas Okken wrote:
Mon Feb 19, 2018 2:33 pm
We'll find out when they release the DM42 development tools, which I believe will happen in the not too distant future.
;)
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ijabbott
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Re: Serial port

Post by ijabbott »

Thomas Okken wrote:
Mon Feb 19, 2018 2:33 pm
We'll find out when they release the DM42 development tools, which I believe will happen in the not too distant future.
I'm hoping they follow the lead of NumWorks, at least for the software (and most of it is yours anyway!).
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Re: Serial port

Post by Thomas Okken »

ijabbott wrote:
Mon Feb 19, 2018 9:37 pm
Thomas Okken wrote:
Mon Feb 19, 2018 2:33 pm
We'll find out when they release the DM42 development tools, which I believe will happen in the not too distant future.
I'm hoping they follow the lead of NumWorks, at least for the software (and most of it is yours anyway!).
The plan was always that they would release the source code, with their modifications, per the GPL, and the necessary tools so that people can build, load, and debug their own firmware images. It has taken longer than I expected, but Michael has assured me that this will happen in the next few weeks.
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ijabbott
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Re: Serial port

Post by ijabbott »

Thomas Okken wrote:
Mon Feb 19, 2018 11:14 pm
ijabbott wrote:
Mon Feb 19, 2018 9:37 pm
Thomas Okken wrote:
Mon Feb 19, 2018 2:33 pm
We'll find out when they release the DM42 development tools, which I believe will happen in the not too distant future.
I'm hoping they follow the lead of NumWorks, at least for the software (and most of it is yours anyway!).
The plan was always that they would release the source code, with their modifications, per the GPL, and the necessary tools so that people can build, load, and debug their own firmware images. It has taken longer than I expected, but Michael has assured me that this will happen in the next few weeks.
The thing I read on the forum from a few months ago suggested they'd supply binary blobs to link the (modified versions of) Free42 against. That didn't sound very GPL compliant, but it depends how they have architected it.
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