NNDK Release 2.7.0 - Issues with MOD5282

[ecasey]

I have been trying to get Release 2.7.0 working with a MOD5282 on a development board with code that worked properly with Release 2.6.8.
The code now hangs at a call to a system function:

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SendBreak( portnum, 1 );

where portnum = 2;

If I comment that function call out, it then hangs at the OSTimeDly(2) (after going through the !dataavail() loop three times ) in this function:

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int ReadCOM(int portnum, int inlen, uchar *inbuf)
{
	int x;
	while (!dataavail(Comfd[portnum]))
				;
	OSTimeDly(2);
	x = ReadWithTimeout(Comfd[portnum], (char*)inbuf, inlen, 10);
	return x;
}

There is no trap; it just hangs, will not AutoUpdate and I have to load a known good s.19 file to get it back to where it will be seen again by NBFind.
Debug fails with the message "connection refused", so it is hard to pin down the problem(s).
I ran the Rebuild All System Files utility successfully, but that did not change the result.

I went back to Release 2.6.8 and the code worked fine, so it is not likely a hardware issue.

Any suggestions as to where to look for solutions would be appreciated.

Ed

[dciliske]

This gets a What The ... from me. I'm perplexed. We'll investigate this.

[ecasey]

Dan,

I tried a simple program on the MOD5282 compiled with Release 2.7.0

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#include "predef.h"
#include <stdio.h>
#include <startnet.h>
#include <autoupdate.h>
#include <dhcpclient.h>
#include <smarttrap.h>
#include <taskmon.h>
#include <NetworkDebug.h>

extern "C" {
void UserMain(void * pd);
}

const char * AppName="DS2480B";

void UserMain(void * pd) {
   InitializeStack();
    if (EthernetIP == 0) GetDHCPAddress();
    OSChangePrio(MAIN_PRIO);
    EnableAutoUpdate();
    StartHTTP();
    EnableTaskMonitor();

    #ifndef _DEBUG
    EnableSmartTraps();
    #endif

    #ifdef _DEBUG
    InitializeNetworkGDB_and_Wait();
    #endif


    iprintf("Application started\n");

	while (1) {
		iprintf("Hello");
               OSTimeDly(80);
    }
}

I get "Application started" and one "Hello" and then it hangs.

If I comment out the OSTimeDly(80), I get continuous "Hello"s, but it won't switch tasks, so nothing else works.

Possibly a problem with UCOS.

Ed

[rnixon]

Are you running in debug mode or release mode?

[ecasey]

I have tried both. Autoupdate doesn't work, so I have to get it back via the serial port.
The same program runs on my MOD54415. I have tried two MOD5282s with the same results.
Are you running a MOD5282 with something compiled on Release 2.7.0?

[rnixon]

I just tried your code with my install of 2.7.0, and it is crashing too. Hmmmmm

[ecasey]

Yes, I just went back and compiled the factory demo under 2.7.0 for the MOD5282 from the 2.7.0 release examples and it crashed. It looks like something fundamental; the MOD5282 disappears from NBFind and IPSetup doesn't see it after it loads. Then I have to load a known good .s19 from an earlier release via serial to get the MOD5282 to allow an Ethernet update again.

[dciliske]

It was a BSP issue with the Tick Timer... A change that got propagated to all other platforms, except only partially to the MOD5282.

The fix, change lines 56 and 57 from:

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   asm("	move.w #0x0F,%d0"); //Reset pit[0] interrupt
   asm("	move.w %d0,0x40150001");

to

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   asm("	move.b #0x0F,%d0"); //Reset pit[0] interrupt
   asm("	move.b %d0,0x40150001");

The previous version was:

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   asm("	move.w #0x60F,%d0");
   asm("	move.w %d0,0x40150000");

The address got shifted over to match the better value, but not the instruction width. The incorrect instruction made it so that the IRQ flag was never cleared, and therefore that the ISR never triggered, preventing timer based task switching from occurring. It has now been fixed :/

-Dan

[ecasey]

Excellent! I tested several of my systems and the fix worked like a charm.

Thanks Dan