 | | Custom firmware crashing on boot
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Hey, I'm new here, so if I seem like a n00b, it's probably because I am. Hopefully my question won't be too annoying. I'm trying to use the NXTGCC 0.0.9 package as a starting point for custom firmware. The main point of my custom firmware is to swap (...) (17 years ago, 27-Jun-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: Using NXT Port 4 EIA-485
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(...) Does anybody have an NXC program that demonstrates the use of RS485 communications? (17 years ago, 25-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: pbLua PCF8574 SOLVED !
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(...) Let me say thanks to Dick as well. I think that the NXT firmware does what's called a repeat start in the I2C definition... Here's the part in the I2C spec that is required: (URL) And with pictures: (URL) Hope this helps... Ralph (17 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: pbLua PCF8574 SOLVED !
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(...) Hi Dick, your answer solves my knot :D It's a NXT specific behaviour and all alternatives NXT-OSes which uses original Lego-Source-Lowlevel routines have this feature ? Thanks for your answer Bye Christian (17 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | RE: pbLua PCF8574 SOLVED ?
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(...) This is the excepted behavior. When you want to read from I2C device, the NXT firmware first sends a write message to load the internal index "pointer" for the I2C device and then sends a read message that will read the requested number of (...) (17 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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