picovoice_driver: stm32h7xx_hal_rcc.c File Reference

RCC HAL module driver. This file provides firmware functions to manage the following functionalities of the Reset and Clock Control (RCC) peripheral: More...

#include "stm32h7xx_hal.h"

Include dependency graph for stm32h747/stm32h747i-disco/CM7/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_rcc.c:

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Detailed Description

RCC HAL module driver. This file provides firmware functions to manage the following functionalities of the Reset and Clock Control (RCC) peripheral:

Author

MCD Application Team

Initialization and de-initialization functions
Peripheral Control functions

==============================================================================
                    ##### RCC specific features #####
==============================================================================
  [..]
    After reset the device is running from Internal High Speed oscillator
    (HSI 64MHz) with Flash 0 wait state,and all peripherals are off except
    internal SRAM, Flash, JTAG and PWR
    (+) There is no pre-scaler on High speed (AHB) and Low speed (APB) buses;
        all peripherals mapped on these buses are running at HSI speed.
    (+) The clock for all peripherals is switched off, except the SRAM and FLASH.
    (+) All GPIOs are in analogue mode , except the JTAG pins which
        are assigned to be used for debug purpose.

  [..]
    Once the device started from reset, the user application has to:
    (+) Configure the clock source to be used to drive the System clock
        (if the application needs higher frequency/performance)
    (+) Configure the System clock frequency and Flash settings
    (+) Configure the AHB and APB buses pre-scalers
    (+) Enable the clock for the peripheral(s) to be used
    (+) Configure the clock kernel source(s) for peripherals which clocks are not
        derived from the System clock through :RCC_D1CCIPR,RCC_D2CCIP1R,RCC_D2CCIP2R
        and RCC_D3CCIPR registers

                    ##### RCC Limitations #####
==============================================================================
  [..]
    A delay between an RCC peripheral clock enable and the effective peripheral
    enabling should be taken into account in order to manage the peripheral read/write
    from/to registers.
    (+) This delay depends on the peripheral mapping.
    (+) If peripheral is mapped on AHB: the delay is 2 AHB clock cycle
        after the clock enable bit is set on the hardware register
    (+) If peripheral is mapped on APB: the delay is 2 APB clock cycle
        after the clock enable bit is set on the hardware register

  [..]
    Implemented Workaround:
    (+) For AHB & APB peripherals, a dummy read to the peripheral register has been
        inserted in each __HAL_RCC_PPP_CLK_ENABLE() macro.

Attention

This software component is licensed by ST under BSD 3-Clause license, the "License"; You may not use this file except in compliance with the License. You may obtain a copy of the License at: opensource.org/licenses/BSD-3-Clause

Definition in file stm32h747/stm32h747i-disco/CM7/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_rcc.c.

Detailed Description

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