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HAL_Init() function
This function is used to initialize the HAL Library; it must be the first instruction to be executed in the main program (before to call any other HAL function), it performs the following: Configure the Flash prefetch, instruction and Data caches. Configures the SysTick to generate an interrupt each 1 millisecond, which is clocked by the HSI (at this stage, the clock is not yet configured and thus the system is running from the internal HSI at 16 MHz). Set NVIC Group Priority to 4. Calls the HAL_MspInit() callback function defined in user file "stm32f4xx_hal_msp.c" to do the global low level hardware initialization
Syntax
Implemented in ![]()
stm32f4xx_hal.c:157
Return value
HAL status
Notes
SysTick is used as time base for the HAL_Delay() function, the application need to ensure that the SysTick time base is always set to 1 millisecond to have correct HAL operation.