Compiler/MSP430FR2355: Please explain why I cannot set breakpoint??

steve wenner

Part Number: MSP430FR2355

Tool/software: TI C/C++ Compiler

Can someone please tell me why I cannot set breakpoint? See attached....1651.Doc1.docx

I cannot seem to set any breakpoint AFTER the CRC_Result if condition.....Anyone know why? Certainly this code must run after the 'if' statement?

        if (!transmitter) {
            if (mssgRcvd) {
                mssgRcvd = F;
                pRx = incoming;
                P5OUT &= ~BIT0;
                memcpy(noCRC, incoming, sizeof(noCRC));
                CRC_Result = CRC(noCRC);
                if ((char)(((CRC_Result >> 8) & 0xFF) == incoming[6]) && ((char)((CRC_Result & 0xFF) == incoming[7]))) {
A BUNCH OF CODE!!!!!!!!!!
                }
                RFPackets++; //troubleshooting line only
                pRx = incoming;
                UCA1RXBUF = 0;
                UCA1IFG &= ~UCRXIFG;
                UCA1IE |= UCRXIE;
            }
        }

over 5 years ago

0 Keith Barkley over 5 years ago

Guru 42215 points

Do you have optimization turned on?

Sometimes you can't set a breakpoint because optimization removed or reordered the code.

0 steve wenner over 5 years ago in reply to Keith Barkley

Expert 2355 points

Heres my settings....Not sure where I would set it for this?

Turned it off but to no avail.....

0044.Doc1.docx

0 Keith Barkley over 5 years ago in reply to steve wenner

Guru 42215 points

What is the type of CRC_Result? If the computer in my head is working correctly, If it is 8 bits, when you do the shift you will get 0, so the if clause can never execute, and in fact will short-circuit.

0 steve wenner over 5 years ago in reply to Keith Barkley

Expert 2355 points

CRC_Result is an unsigned int.....It is a returned value from a canned TI register level program that uses the CRC hardware (16 bit result).....

Interesting....If I place the block of code before the if statement I can set breakpoints BUT then the last group of lines inside the if statement don't let me set breakpoints.....In the original context I could set breakpoints on the last lines within the if statement but not the lines following the if.....Does this tell you anything?

0 Keith Barkley over 5 years ago in reply to steve wenner

Guru 42215 points

Why are you casting the boolean result of == to a char?

0 steve wenner over 5 years ago in reply to Keith Barkley

Expert 2355 points

Bcz incoming is coming from the radio in char format.....

I went ahead and dropped the source into a sandbox from scratch up and I can set breakpoints now.....It has something to do with my proj settings....I have been playing around with the debug configuration stuff and maybe that has something to do with it??? I have twO 2355 evaluation modules connected to USB1 and USB2....I created two ccxml files one for the host and one for the client.....I created multiple debug configurations and then I select the one I'm interested in for loading code....For instance one debug/config is for symbols and one is for program....But I looked at the switches in there and don't see anything that raises a flag....Also the sandbox contained the same optimization as I had so I don't think its that

Your thoughts

0 steve wenner over 5 years ago in reply to steve wenner

Expert 2355 points

I've been playing with the different debug/configs and ccxml ....Using the debug window I WAS showing I wasn't connecting to the target for some reason...I've gotten it to work/connect now and can set breakpoint.....Not completely sure of what I fixed/did but I think it's resolved...

Thanks for the help

0 Keith Barkley over 5 years ago in reply to steve wenner

Guru 42215 points

I have denoted the level of the parens with numbers:

(4(1char1)(3(2(1CRC_Result >> 81) & 0xFF2) == incoming[6]3)

You are not casting ((CRC_Result >> 8) & 0xFF) to a char which makes sense to compare the same things, but the result of x==y.

0 steve wenner over 5 years ago in reply to Keith Barkley

Expert 2355 points

Yes it seems I am casting (char)(x==y).....That definitely looks incorrect.....given that x is an unsigned int and y is a char it seems I should be (char)x == y.....Is this what you are saying?

0 Keith Barkley over 5 years ago in reply to steve wenner

Guru 42215 points

Yes, that is what I am saying.

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Compiler/MSP430FR2355: Please explain why I cannot set breakpoint??