static HAL_StatusTypeDef FLASH_OB_PCROPConfig()

in CMake-armcc/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c [997:1108]

• 89 lines of code
• 57 McCabe index (conditional complexity)

static HAL_StatusTypeDef FLASH_OB_PCROPConfig(uint32_t PCROPConfig, uint32_t PCROPStartAddr, uint32_t PCROPEndAddr)
{
  HAL_StatusTypeDef status;
  uint32_t reg_value;
  uint32_t bank1_addr;
#if defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || \
    defined (STM32L496xx) || defined (STM32L4A6xx) || \
    defined (STM32L4P5xx) || defined (STM32L4Q5xx) || \
    defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx)
  uint32_t bank2_addr;
#endif

  /* Check the parameters */
  assert_param(IS_FLASH_BANK_EXCLUSIVE(PCROPConfig & FLASH_BANK_BOTH));
  assert_param(IS_OB_PCROP_RDP(PCROPConfig & FLASH_PCROP1ER_PCROP_RDP));
  assert_param(IS_FLASH_MAIN_MEM_ADDRESS(PCROPStartAddr));
  assert_param(IS_FLASH_MAIN_MEM_ADDRESS(PCROPEndAddr));

  /* Wait for last operation to be completed */
  status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);

  if(status == HAL_OK)
  {
#if defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || \
    defined (STM32L496xx) || defined (STM32L4A6xx) || \
    defined (STM32L4P5xx) || defined (STM32L4Q5xx) || \
    defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx)
    /* Get the information about the bank swapping */
    if (READ_BIT(SYSCFG->MEMRMP, SYSCFG_MEMRMP_FB_MODE) == 0U)
    {
      bank1_addr = FLASH_BASE;
      bank2_addr = FLASH_BASE + FLASH_BANK_SIZE;
    }
    else
    {
      bank1_addr = FLASH_BASE + FLASH_BANK_SIZE;
      bank2_addr = FLASH_BASE;
    }
#else
    bank1_addr = FLASH_BASE;
#endif

#if defined (STM32L4P5xx) || defined (STM32L4Q5xx) || defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx)
    if (READ_BIT(FLASH->OPTR, FLASH_OPTR_DBANK) == 0U)
    {
      /* Configure the Proprietary code readout protection */
      if((PCROPConfig & FLASH_BANK_BOTH) == FLASH_BANK_1)
      {
        reg_value = ((PCROPStartAddr - FLASH_BASE) >> 4);
        MODIFY_REG(FLASH->PCROP1SR, FLASH_PCROP1SR_PCROP1_STRT, reg_value);

        reg_value = ((PCROPEndAddr - FLASH_BASE) >> 4);
        MODIFY_REG(FLASH->PCROP1ER, FLASH_PCROP1ER_PCROP1_END, reg_value);
      }
      else if((PCROPConfig & FLASH_BANK_BOTH) == FLASH_BANK_2)
      {
        reg_value = ((PCROPStartAddr - FLASH_BASE) >> 4);
        MODIFY_REG(FLASH->PCROP2SR, FLASH_PCROP2SR_PCROP2_STRT, reg_value);

        reg_value = ((PCROPEndAddr - FLASH_BASE) >> 4);
        MODIFY_REG(FLASH->PCROP2ER, FLASH_PCROP2ER_PCROP2_END, reg_value);
      }
      else
      {
        /* Nothing to do */
      }
    }
    else
#endif
    {
      /* Configure the Proprietary code readout protection */
      if((PCROPConfig & FLASH_BANK_BOTH) == FLASH_BANK_1)
      {
        reg_value = ((PCROPStartAddr - bank1_addr) >> 3);
        MODIFY_REG(FLASH->PCROP1SR, FLASH_PCROP1SR_PCROP1_STRT, reg_value);

        reg_value = ((PCROPEndAddr - bank1_addr) >> 3);
        MODIFY_REG(FLASH->PCROP1ER, FLASH_PCROP1ER_PCROP1_END, reg_value);
      }
#if defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || \
    defined (STM32L496xx) || defined (STM32L4A6xx) || \
    defined (STM32L4P5xx) || defined (STM32L4Q5xx) || \
    defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx)
      else if((PCROPConfig & FLASH_BANK_BOTH) == FLASH_BANK_2)
      {
        reg_value = ((PCROPStartAddr - bank2_addr) >> 3);
        MODIFY_REG(FLASH->PCROP2SR, FLASH_PCROP2SR_PCROP2_STRT, reg_value);

        reg_value = ((PCROPEndAddr - bank2_addr) >> 3);
        MODIFY_REG(FLASH->PCROP2ER, FLASH_PCROP2ER_PCROP2_END, reg_value);
      }
#endif
      else
      {
        /* Nothing to do */
      }
    }

    MODIFY_REG(FLASH->PCROP1ER, FLASH_PCROP1ER_PCROP_RDP, (PCROPConfig & FLASH_PCROP1ER_PCROP_RDP));

    /* Set OPTSTRT Bit */
    SET_BIT(FLASH->CR, FLASH_CR_OPTSTRT);

    /* Wait for last operation to be completed */
    status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);

    /* If the option byte program operation is completed, disable the OPTSTRT Bit */
    CLEAR_BIT(FLASH->CR, FLASH_CR_OPTSTRT);
  }

  return status;
}