/**
* @brief Configure the Flash prefetch, the Instruction and Data caches,
* the time base source, NVIC and any required global low level hardware
* by calling the HAL_MspInit() callback function to be optionally defined in user file
* stm32l4xx_hal_msp.c.
*
* @note HAL_Init() function is called at the beginning of program after reset and before
* the clock configuration.
*
* @note In the default implementation the System Timer (Systick) is used as source of time base.
* The Systick configuration is based on MSI clock, as MSI is the clock
* used after a system Reset and the NVIC configuration is set to Priority group 4.
* Once done, time base tick starts incrementing: the tick variable counter is incremented
* each 1ms in the SysTick_Handler() interrupt handler.
*
* @retval HAL status
*/
HAL_StatusTypeDef HAL_Init(void)
{
/* Configure Flash prefetch, Instruction cache, Data cache */
/* Default configuration at reset is: */
/* - Prefetch disabled */
/* - Instruction cache enabled */
/* - Data cache enabled */
#if (INSTRUCTION_CACHE_ENABLE == 0)
__HAL_FLASH_INSTRUCTION_CACHE_DISABLE();
#endif /* INSTRUCTION_CACHE_ENABLE */
#if (DATA_CACHE_ENABLE == 0)
__HAL_FLASH_DATA_CACHE_DISABLE();
#endif /* DATA_CACHE_ENABLE */
#if (PREFETCH_ENABLE != 0)
__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
#endif /* PREFETCH_ENABLE */
/* Set Interrupt Group Priority */
HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* Use SysTick as time base source and configure 1ms tick (default clock after Reset is MSI) */
HAL_InitTick(TICK_INT_PRIORITY);
/* Init the low level hardware */
HAL_MspInit();
/* Return function status */
return HAL_OK;
}
/**
* @brief Flush the instruction and data caches
* @retval None
*/
void FLASH_FlushCaches(void)
{
/* Flush instruction cache */
if(READ_BIT(FLASH->ACR, FLASH_ACR_ICEN))
{
/* Disable instruction cache */
__HAL_FLASH_INSTRUCTION_CACHE_DISABLE();
/* Reset instruction cache */
__HAL_FLASH_INSTRUCTION_CACHE_RESET();
/* Enable instruction cache */
__HAL_FLASH_INSTRUCTION_CACHE_ENABLE();
}
/* Flush data cache */
if(READ_BIT(FLASH->ACR, FLASH_ACR_DCEN))
{
/* Disable data cache */
__HAL_FLASH_DATA_CACHE_DISABLE();
/* Reset data cache */
__HAL_FLASH_DATA_CACHE_RESET();
/* Enable data cache */
__HAL_FLASH_DATA_CACHE_ENABLE();
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization: global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Initialize LED1 and LED3 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/* Unlock the Flash to enable the flash control register access *************/
HAL_FLASH_Unlock();
/* Erase the user Flash area
(area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/
/* Get the 1st sector to erase */
FirstSector = GetSector(FLASH_USER_START_ADDR);
/* Get the number of sector to erase from 1st sector*/
NbOfSectors = GetSector(FLASH_USER_END_ADDR) - FirstSector + 1;
/* Fill EraseInit structure*/
EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;
EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
EraseInitStruct.Sector = FirstSector;
EraseInitStruct.NbSectors = NbOfSectors;
if (HAL_FLASHEx_Erase(&EraseInitStruct, &SECTORError) != HAL_OK)
{
/*
Error occurred while sector erase.
User can add here some code to deal with this error.
SECTORError will contain the faulty sector and then to know the code error on this sector,
user can call function 'HAL_FLASH_GetError()'
*/
/* Infinite loop */
while (1)
{
/* Make LED3 blink (1s period) to indicate error in Erase operation */
BSP_LED_On(LED3);
HAL_Delay(1000);
BSP_LED_Off(LED3);
HAL_Delay(1000);
}
}
/* Note: If an erase operation in Flash memory also concerns data in the data or instruction cache,
you have to make sure that these data are rewritten before they are accessed during code
execution. If this cannot be done safely, it is recommended to flush the caches by setting the
DCRST and ICRST bits in the FLASH_CR register. */
__HAL_FLASH_DATA_CACHE_DISABLE();
__HAL_FLASH_INSTRUCTION_CACHE_DISABLE();
__HAL_FLASH_DATA_CACHE_RESET();
__HAL_FLASH_INSTRUCTION_CACHE_RESET();
__HAL_FLASH_INSTRUCTION_CACHE_ENABLE();
__HAL_FLASH_DATA_CACHE_ENABLE();
/* Program the user Flash area word by word
(area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********/
Address = FLASH_USER_START_ADDR;
while (Address < FLASH_USER_END_ADDR)
{
if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, Address, DATA_32) == HAL_OK)
{
Address = Address + 4;
}
else
{
/* Error occurred while writing data in Flash memory.
User can add here some code to deal with this error */
while (1)
{
/* Make LED3 blink (1s period) to indicate error in Write operation */
BSP_LED_On(LED3);
HAL_Delay(1000);
BSP_LED_Off(LED3);
HAL_Delay(1000);
}
}
}
/* Lock the Flash to disable the flash control register access (recommended
to protect the FLASH memory against possible unwanted operation) *********/
HAL_FLASH_Lock();
/* Check if the programmed data is OK
MemoryProgramStatus = 0: data programmed correctly
MemoryProgramStatus != 0: number of words not programmed correctly ******/
Address = FLASH_USER_START_ADDR;
MemoryProgramStatus = 0x0;
while (Address < FLASH_USER_END_ADDR)
{
data32 = *(__IO uint32_t *)Address;
if (data32 != DATA_32)
{
MemoryProgramStatus++;
}
Address = Address + 4;
}
/*Check if there is an issue to program data*/
if (MemoryProgramStatus == 0)
{
/* No error detected. Switch on LED1*/
BSP_LED_On(LED1);
}
else
{
/* Error detected. Switch on LED3*/
BSP_LED_On(LED3);
}
/* Infinite loop */
while (1)
{
}
}
