about _int_disable

bluehacker — Mon, 03 Oct 2011 22:07:54 GMT

I find _int_disable in MQX seems not disable interrupt actually. see the following codes:

_int_disable();

for(i=0;i<3;i++){

file = fopen("a:init.txt","a+");

if(file!=NULL)

break;

}

if(i==3){

return -1;

}

fseek(file,0,IO_SEEK_SET);

_bsp_serve_wdog();

i = write(file,(char*)&board_info,sizeof(board_info));

...

fclose(file);

_int_enable();

return 0;

I find other tasks can get cpu running after _int_disable, and if another task also call above codes, the synchronization trouble occur!

Re: about _int_disable

cyborgnegotiato — Mon, 03 Oct 2011 23:11:35 GMT

I don't understand what you really want, function _int_disable() do not mask all interrupts (it is not global interrupt mask like cpsid i) but changing BASEPRI only. This means, you can have high priority interrupts which can't be disabled with _int_disable() but be careful, this high priority interrupt can't call any MQX function.

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about _int_disable

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