 | | Re: Lego Network Protocol questions
|
|
(...) Oops, I must've just caught the tail end of the conversation. I assumed the standard [lame] lego protocol was being discussed, not a custom protocol. Sorry. Dave (25 years ago, 2-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
|
| |
| | RE: Lego Network Protocol questions
|
|
With all of the talk about networking and IP embedding and such, and since I'm working on a proprietary '485 master/slave protocol for a client, I had to dust off a GREAT university text on networks. It devotes an entire chapter to ALOHA and slotted (...) (25 years ago, 1-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
|
| |
| | Re: Lego Network Protocol questions
|
|
(...) Dave, did you catch the crosspost from lugnet.robotics.rcx.legos? I think there were details discussed there that may or may not have amounted to a fairly specific proposal for a protocol for LegOS. Anybody care to summarize whatever was (...) (25 years ago, 1-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
|
| |
| | Re: Lego Network Protocol questions
|
|
(...) Transmit whenever you feel like it and hope you didn't obliterate data coming from the other direction. Rudimentary, but still quite effective given the typical use pattern with is host driven command/response. With RCX to RCX communication (...) (25 years ago, 30-Apr-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
|
| |
| | Lego Network Protocol questions
|
|
Hi all. I came to the discussions on the LNP a bit late and was wondering if the following questions had been discussed (I flipped through an old Communications course book and noted some thoughts): - Can we do Carrier Sense *whilst* we are (...) (25 years ago, 30-Apr-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
|
| |
| | Re: IS free()'s operation atomic?
|
|
(...) I agree, free() is not ISR safe. One thread can get preempted after the check but before the store, and a second thread can adjust mm_first_free, making the first thread's check invalid. -Kekoa (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.legos)
|
| |
| | IS free()'s operation atomic?
|
|
Hi all I think that free() operation in mm.c is not ISR safe in multitasking mode. This operation is not keep coherence about value of mm_first_free,is it? ---...--- in mm.c ---...--- // for task safe operations, free needs to be // atomic and (...) (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.legos)
|
| |
| | Rom sensor read routine
|
|
In writing some sensor code yesterday/today (it's 6 am), I passed over the ROM sensor code at 14c0. The documentation has been put in the usual place. The rotation code is pretty simple: the expected state machine, with split points between the four (...) (25 years ago, 25-Apr-99, to lugnet.robotics.rcx.legos)
|
| |
| | Re: legOS Network Protocol
|
|
(...) given (...) lego (...) [ stuff about lego/native collisions ] (...) of a (...) on (...) I was wondering, since people are considering using tags in the LNP frame to signify local to local messages, could we not also use this to "label" non (...) (25 years ago, 23-Apr-99, to lugnet.robotics.rcx.legos)
|
| |
| | Re: loading s/w
|
|
(...) In my brief experimentation with rom_reset(), it does not actually clear the rom- rather it only starts the program over again (in main()). Is this intentional? I get this behavior when calling it from main- when calling it from within another (...) (25 years ago, 21-Apr-99, to lugnet.robotics.rcx.legos)
|
