Extend RTOS-IPC example results in error

C.Lorei

Other Parts Discussed in Thread: SYSBIOS

Hi at all,
I try to modify the IPC DEMO Example for the F28M35H52C1. The Demo it self, works fine. But when I add a new Variable to the "TempMsg Struct" and try to read or write the Variable the System stuck and I get this message:

ti.sysbios.heaps.HeapBuf: line 125: assertion failure: HeapBuf_create's bufSize parameter is invalid (too small)
xdc.runtime.Error.raise: terminating execution

I use CCS 6.0.1.00040 und TI RTOS 1.21.0.09

This is the struct

typedef struct TempMsg {
    MessageQ_MsgHeader hdr;
    float temperatureF;
    float temperatureC;
    float test;
} TempMsg;

and with ((TempMsg *)msg)->testvar = test; I Try to write a Value, from M3 to C28

over 11 years ago

Tom Kopriva over 11 years ago

TI__Mastermind 20480 points

Can you increase BIOS.heapSize? It looks like you just ran out of memory when demo.c is trying to create the MessageQ heap.

C.Lorei over 11 years ago in reply to Tom Kopriva

Intellectual 400 points

Hi Tom, I already increased the BIOS heapsize from 0x5FC0 to 0x6FC0 and to 0x8FC0;

Unfortunately the error remains the same.

Tom Kopriva over 11 years ago in reply to C.Lorei

TI__Mastermind 20480 points

In demo.c, can you check to see that the hbparams.bufSize, hbparams.blockSize, hbparams.numBlocks are correct.

You're seeing an error because the bufSize is smaller than numBlocks * blockSize.

Henrique Chaves over 11 years ago in reply to Tom Kopriva

Prodigy 70 points

Hello.

I am facing the exact same problem.

Whenever I try to add more variables in my typedef struct I don't know how to set the numBlocks and the BIOS.heapSize. I have tried to increase both but it seems like I am doing something wrong.

I have the following in my code:

typedef struct TempMsg2 {
    MessageQ_MsgHeader hdr;
    Float msga;
    Float msgb;
    Float msgc;
    Float msgd;
    Float msge;
    Float msgf;
    Float msgg;
} TempMsg2;

numBlocks = 10;

BIOS.heapSize = 0x8FC0;

Tom Kopriva.

Can you explain how to set the values for those parameters in a generic way (numBlocks and BIOS.heapSize)?

Thank you.

C.Lorei over 11 years ago in reply to Henrique Chaves

Intellectual 400 points

Hi and sorry for my late reply
I have solved the problem and I was able to determine the cause.

These two lines of code are there

blockSize = sizeof(TempMsg);

buf = Memory_alloc(0, numBlocks * blockSize, 0, NULL);

siezeOf (TempMsg) is the Problem, I changed it to a fix Value like

 blockSize = 64;

and and everything works. But I still do not know why sizeof (TempMsg) calculated the wrong value.

I have made the changes naturally in both projects (M3 C28). At the cfg-files I have changed nothing.

Henrique Chaves over 11 years ago in reply to C.Lorei

Prodigy 70 points

Hello.

I have been able to understand it a bit better.

Under the sys/bios user guide I found the following in chapter 6

"The blocksize needs to be a multiple of the worst-case structure alignment size. And bufSize should be equal to blockSize * numBlocks. The worst-case structure alignment is target dependent. On C6x and ARM devices, this value is 8. The base address of the buffer should also be aligned to this same size."

Thus, the only thing you should do is increase the numBlocks in order to be a multiple of the worst-case structure alignment size of the device block, in my case, 8.

For instante, 2, 4, 8, 16, 32, 64 and so on.

I hope it helps.

Processors

Processors forum

Extend RTOS-IPC example results in error