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New xmega Bootloader (App Note AVR1605) - Port to GCC
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clawson

Posted: Sep 28, 2010 - 04:12 PM

Joined: Jul 18, 2005
Posts: 62219
Location: (using avr-gcc in) Finchingfield, Essex, England

Quote:

I suppose some applications are critical on the inital state of the CPU registers, but it would be bad coding practice to assume that the GPR are initialized to zero. I don't think GCC makes that assumption when using register variables. In any case the WDT is a good way to clear out the processor to it's init state.

The real gotcha are any unhandled ??IE?? bits that are set when you sei(). For tiny/mega then WDT is the perfect way to reset the h/w. For Xmega it has a more direct mechanism to force a reset of the CPU state machine.

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masoud_abbasi

Posted: Mar 13, 2012 - 12:16 PM

Joined: Jan 25, 2012
Posts: 1

hi all
i had a problem with avr1605 that when program the application code >64K with avrosp bootloader it take error unequal at address 0x10000
i fix it .the address variable has been overflow.casting was needed as wel as this------>
else if(val == 'A') // Set address...
{ // NOTE: Flash addresses are given in words, not bytes.
address = (((long int) recchar()) << Cool

| recchar(); // Read address high and low byte.
sendchar('\r'); // Send OK back.
}

kind regard
masoud abbasi fard

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