Compiler/MSP430-GCC-OPENSOURCE: MSP430-GCC can't use memset for more than 4k arrays

user5340675

Part Number: MSP430-GCC-OPENSOURCE
Other Parts Discussed in Thread: MSP430F5529,

Tool/software: TI C/C++ Compiler

Hi ,I'm using msp430f5529 with MSP430-GCC-OPENSOURCE on linux,when I try to memset a buf[4096] to 0,like this

#define BUFSIZE 2048
uint8_t buf[BUFSIZE];
int main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT

  memset(buf,0x00,sizeof(uint8_t)  * BUFSIZE);

the program will stuck before main function.when I debug I found the compiler will automatic memset before main,and if the BUFSIZE is too large(2048 is fine ,but 4096 can't work).

Why?

over 6 years ago

0 George Mock over 6 years ago

TI__Guru**** 243760 points

The startup code sets all uninitialized variables, like buf, to 0 before main starts. My guess is the watchdog timer is going off during startup. I know how to disable the watchdog during the startup code used by the TI MSP430 compiler. I don't know how to do it with the GCC MSP430 compiler. I'll get back to you on that.

Thanks and regards,

-George

0 George Mock over 6 years ago in reply to George Mock

TI__Guru**** 243760 points

Please try the solution discussed at the end of this forum thread.

Thanks and regards,

-George

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Compiler/MSP430-GCC-OPENSOURCE: MSP430-GCC can't use memset for more than 4k arrays