I am using a Kinetis K70, KDS 3.0.0, and MQX Lite.
I want to use srand() and rand()
I have noticed that if I call srand or rand within a MQX lite task, I get a hard fault.
However, if I call srand in the main.c, prior to PEX_RTOS_START, rand will work fine in MQX tasks.
If there a MQX setting or something I need to do. I would rather not modify main.c since it was generated.
I was able to reproduce the problem with a fresh project with MQX lite added.
This code produces a hard fault at the call of srand
void Task1_task(uint32_t task_init_data)
{
int counter = 0;
srand(50);
while(1)
{
counter = rand();
}
}
But adding srand here, makes it start working..
int main(void)
/*lint -restore Enable MISRA rule (6.3) checking. */
{
/* Write your local variable definition here */
/*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/
PE_low_level_init();
/*** End of Processor Expert internal initialization. ***/
/* Write your code here */
/* For example: for(;;) { } */
srand(10);
/*** Don't write any code pass this line, or it will be deleted during code generation. ***/
/*** RTOS startup code. Macro PEX_RTOS_START is defined by the RTOS component. DON'T MODIFY THIS CODE!!! ***/
#ifdef PEX_RTOS_START
PEX_RTOS_START(); /* Startup of the selected RTOS. Macro is defined by the RTOS component. */
#endif
/*** End of RTOS startup code. ***/
/*** Processor Expert end of main routine. DON'T MODIFY THIS CODE!!! ***/
for(;;){}
/*** Processor Expert end of main routine. DON'T WRITE CODE BELOW!!! ***/
} /*** End of main routine. DO NOT MODIFY THIS TEXT!!! ***/
Why?
