topic Re: Imxrt1064 hardfault handler error in i.MX RT Crossover MCUs

Imxrt1064 hardfault handler error

vasudhevan — Sat, 13 Jun 2020 16:55:49 GMT

Hi,

Board = IMXRT1064 evk

RAM = OCRAM

Disabled:

SCB_DisableICache();

SCB_DisableDCache();

When we trying to access structure that time hard fault error occurring.

Example :

typedef struct test_stat_t
{
    uint8_t ip_status;
    uint8_t test_data1;
    uint8_t test_data2;
}test_stat;



void *test_thread(void *arg)
{
   test_stat *data;

   data->ip_status = 1;          // Occurs hardfault handler error 
   data->test_data1 = 10;        // Occurs hardfault handler error 
   data->test_data2 = 20;        // Occurs hardfault handler error 



}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

This thread stack size increased upto 5k but still this error occurs.

This code syntactically correct but why hard fault error occurs ?

If we run application on OCRAM (or) SDRAM what are memory configuration we have to change including lwip ?

How to solve this issue ?

Thanks & Regards,

Vasu

Re: Imxrt1064 hardfault handler error

carstengroen — Sun, 14 Jun 2020 15:58:08 GMT

What is the pointer "data" assigned (pointing) to ?

Re: Imxrt1064 hardfault handler error

mjbcswitzerland — Sun, 14 Jun 2020 17:27:34 GMT

The code

   test_stat *data;

   data->ip_status = 1;          // Occurs hardfault handler error

may not give a compiler "error" but I'm certain that there is a compiler "warning" about using an uninitialised pointer that is almost certainly going to cause a hard fault (or random undefined behavior) when executed. Or is the "example" not accurate???

Regards

Mark

Re: Imxrt1064 hardfault handler error

crist_xu — Mon, 08 Mar 2021 07:09:48 GMT

Maybe an Unaligned error， so Please check the MPU configuration.