NetBurner Community Forum

One man's prize is another man's poison. Of course the JVM adds overhead. For the record, C adds overhead. You use C because it is more convenient than programming in the assembler code. If you experiment some with Java you'll see some of the things it does well, and you'll see things it does not do...

That's a matter of "perspective" in eclipse. There are Java perspectives, c/c++, html, xml,...

Netburner provides us with a customized perspective that works well with the Netburner boards. If you google around, byou might find a BASIC perspective. You're always free to write one...

Flexibility mainly. I've never understood why people marry specific programming languages. Java has first-rate constructs for threading and thread synchronization.

I don't know much about your specific problem, but don't try to print from an ISR. It won't work. If your board has a pin tied to an LED, turn the LED on to indicate that you've reached it.

Has anyone heard of a port of real time Java to MicroC/OS-II?
For that matter, it would be interesting to see if there is a port for Java Embedded 6 to MicroC/OS-II?
Open Java opens up the "general purpose" Java source for other targets, but I don't think the real-time java is in that.

I'd be very interested in seeing what kind of response this would get you:


__asm__(
"lea sim+0x10000e,%a0\n\t" // put &sim.gpio.porta into A0
"Loop:"
"bchg #0,(%a0)\n\t" // Chage bit 0 of memory
"bras Loop\n\t"
);

by "stops sending" do you mean it generates an error, or quietly stops sending. my initial suspicion is that you are filling up the receive buffer (because you are sending so much faster).

can you include the code?

John

i doubt there is a single instruction to do that, but i'm not very knowledgable about 68000 machine code. Here is how to inline assembler code to do something like you want: __asm__( "$myloop:\n\t" "moveq #1,%d0\n\t" "moveb %d0,sim+0x10000e\n\t" "clrb %d0\n\t"...

By the way, in netburner's supplied documentation, in the FreescaleManuals directory, CFPRM.pdf is the programmers reference manual. I explains the instructions.

This: ffc0417e: 7004 moveq #4,%d0 ffc04180: 13c0 4010 000e moveb %d0,4010000e <sim+0x10000e> ffc04186: 4200 clrb %d0 ffc04188: 13c0 4010 000e moveb %d0,4010000e <sim+0x10000e> is indeed redundant with this: ffc0418e: 7004 moveq #4,%d0 ffc04190: 13c0 4010 000e moveb %d0,4010000e <sim+0x10000e> ffc041...