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I am currently (well, since September) in the process of building an acrylic RepStrap (Darwin). I expect it to be fully assembled some time in December.
As I did have a sourcing discussion with some other reprappers in the area -- my absolute favorite local source for metric fasteners is Tacoma Screw. Just thought it is worth mentioning, as I know of others who were not aware of it.
by
volty
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Washington, Seattle RepRap User Group
Thanks all. Yeah, it seems I am not going to be able to avoid having to put a 644P in.
While USART is not the object used in the firmware (serial is), I see both serial and serial1 being used.
From SanguinoMaster:
//start our hardware serial drivers
void init_serial()
{
pinMode(RX_ENABLE_PIN, OUTPUT);
pinMode(TX_ENABLE_PIN, OUTPUT);
digitalWrite(RX_ENABLE_PIN, LOW); //always listen.
by
volty
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Controllers
I am a bit confused.
I do have access to a hot air rework station and I know how I can de-solder the 644 and put the 644p in. It's just that I don't wanna do it unless the lack of the 2nd USART in the 644 poses an insuperable hardware limitation -- and I couldn't really find anyone who could confirm that it is.
Here's one of the reasons why I haven't given up yet - quote from : "[...]the atmega
by
volty
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Controllers
Hi folks,
i am having some challenges getting the firmware installed on my rmb-1.2.
After quite a while of troubleshooting on my own, I realized that when I assembled my rmb-1.2, I soldered in an atmega644 (device signature = 0x1e9609) instead of an atmega644p (device signature = 0x1e960a). Not on purpose of course - Digi-Key sent the wrong chip, the invoice did not match the package contents,
by
volty
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Controllers