I am writing a simple blinking LED program in MCUXpresso with ksdk 2.4 and Amazon Freertos. I intended to create two instances of the same thread definition by passing a void pointer to my struct which contains the GPIO type and pin number to the thread and later typecast the void pointer to pointer to my structure. however, during debugging, i realised that the new pointer points to a completely different address from my struct data and it always causes a hardware fault. This is however a code which works very well in Kinetis Design studio. I will appreciate help in understanind this problem. ~~~

include <stdio.h>

include “board.h”

include “peripherals.h”

include “pin_mux.h”

include “clock_config.h”

include “MK22F51212.h”

include “fsldebugconsole.h”

typedef struct BLINKYparam { GPIOType* GPIO; uint8t Pinname; } BLINKYparamt; enum PINS { PTD2 = 2, // LED_A };

include “FreeRTOS.h”

include “task.h”

include “semphr.h”

include “timers.h”

include “queue.h”

void airblinky(void* blinkyparameters) ;

define mask(x) ( uint32_t )( 1U << (x) )

int main(void) {

CLOCK_EnableClock(kCLOCK_PortD);
PORT_SetPinMux(PORTD,PTD2,kPORT_MuxAsGpio);

gpio_pin_config_t config = { kGPIO_DigitalOutput, 0 };
GPIO_PinInit(GPIOD, PTD2, &config);

BLINKY_param_t Board_A_blinky = {GPIOD,PTD2};

if (xTaskCreate(air_blinky, "air_blinky_A", 50, &Board_A_blinky, 2,
NULL) == errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY)
    exit(-1);

vTaskStartScheduler();

while (1) {
}
return 0;

} void airblinky(void* blinkyparameters) {

  BLINKY_param_t* LED = (BLINKY_param_t*) blinky_parameters;

TickType_t Lastwakeuptime = xTaskGetTickCount();
uint8_t Flash_Time = 100;

for (;;)
{
    GPIO_PortToggle(LED->GPIO, mask(LED->Pin_name));           // on
    vTaskDelayUntil(&Lastwakeuptime,((Flash_Time * configTICK_RATE_HZ) / (float) 1000));
    GPIO_PortToggle(GPIOD, mask(PTD2));           // off
    vTaskDelayUntil(&Lastwakeuptime,((Flash_Time * configTICK_RATE_HZ) / (float) 1000));
    GPIO_PortToggle(GPIOD, mask(PTD2));            // on
    vTaskDelayUntil(&Lastwakeuptime,((Flash_Time * configTICK_RATE_HZ) / (float) 1000));
    GPIO_PortToggle(GPIOD, mask(PTD2));           // off

    vTaskDelayUntil(&Lastwakeuptime,((2000 * configTICK_RATE_HZ) / (float) 1000));
}

} ~~~

If your question is “the pointer to BoardAblinky is corrupt inside the task airblinky” then that is because BoardAblinky is defined on the stack of main() – which no longer exists when the scheduler has been started. Either make BoardA_blinky static so it is not on the stack, or move the definition to be file scope.

yes, that actually the question. I tried your suggestion and it worked. thanks