FreeRTOS Project Setup with error: expected ')' before string constant - stm32

Question

I am starting a new project on a STM32L476 Nucleo board and planned to use FreeRTOS.
My initial project structure:
main.c
#include "project.h"
int main(void)
{
/* Configure the system clock */
Clock_Config();
/* Configure IOs */
GPIO_Config();
/* FreeRTOS Stuff */
NVIC_SetPriorityGrouping(3);
vTaskStartScheduler();
/* Should never get here! */
while (1){}
}
project.h
#ifndef PROJECT_H_
#define PROJECT_H_
/* MPU Files */
#include "stm32l4xx.h"
/* Project Files */
#include "gpio.h"
#include "clock.h"
/* FreeRTOS */
#include "FreeRTOS.h"
#include "queue.h"
#include "task.h"
#define TASKPRIO_STD ( tskIDLE_PRIORITY + 1 )
#define TICK_TASK_PERIOD_MS pdMS_TO_TICKS( 500 )
#endif /* PROJECT_H_ */
project.c
#include "project.h"
static void vSerialTask( void * pvParameters );
xTaskCreate( vSerialTask, "I2C", configMINIMAL_STACK_SIZE, NULL, TASKPRIO_STD, NULL);
static void vSerialTask( void *pvParameters ){
for( ;; )
{
}
}
I get a syntax error with this structure in xTaskCreate line: expected ')' before string constant
If I move xTaskCreate to my main.c and leave the task itself in my project.c (also have to delete static in this case) my project compiles successfully.
What is the problem here? I already saw working projects where xTaskCreate is not done within main.c so can't imagine this is the real problem?

Answer 1

You can't call the function outside another function and it is exactly what you try to do.
You can only call functions from another functions. The first function executed is main