/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @defgroup STM32 STM32 Drivers
 * @brief STM32 specific support.
 *
 * @ingroup platforms
 */

/**
 * @defgroup STM32_HAL STM32 HAL Support
 * @brief HAL support.
 * @details The STM32 HAL support is responsible for system initialization.
 *
 * @section stm32_hal_1 Supported HW resources
 * - PLL1.
 * - PLL2 (where present).
 * - RCC.
 * - Flash.
 * - DMA1.
 * - DMA2 (where present).
 * .
 * @section stm32_hal_2 STM32 HAL driver implementation features
 * - PLLs startup and stabilization.
 * - Clock tree initialization.
 * - Clock source selection.
 * - Flash wait states initialization based on the selected clock options.
 * - SYSTICK initialization based on current clock and kernel required rate.
 * - DMA support initialization.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_ADC STM32 ADC Support
 * @brief ADC peripheral support.
 * @details The ADC driver supports the STM32 ADCs using DMA channels for
 *          improved performance.
 *
 * @section stm32_adc_1 Supported HW resources
 * - ADC1.
 * .
 * @section stm32_adc_2 STM32 ADC driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Streaming conversion using DMA for maximum performance.
 * - Programmable ADC interrupt priority level.
 * - Programmable DMA bus priority for each DMA channel.
 * - Programmable DMA interrupt priority for each DMA channel.
 * - Programmable DMA error hook for each DMA channel.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_CAN STM32 CAN Support
 * @brief CAN peripheral support.
 *
 * @section stm32_can_1 Supported HW resources
 * - bxCAN1.
 * .
 * @section stm32_can_2 STM32 CAN driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Support for bxCAN sleep mode.
 * - Programmable bxCAN interrupts priority level.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_DMA STM32 DMA Support
 * @brief DMA helper driver.
 *
 * @section stm32_dma_1 Supported HW resources
 * The DMA driver can support any of the following hardware resources:
 * - DMA1.
 * - DMA2.
 * .
 * @section stm32_dma_2 STM32 DMA driver implementation features
 * - Automatic DMA clock stop when not in use by other drivers.
 * - Exports helper functions/macros to the other drivers that share the
 *   DMA resource.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_PAL STM32 GPIO Support
 * @brief GPIO peripherals support.
 *
 * @section stm32_pal_1 Supported HW resources
 * - AFIO.
 * - GPIOA.
 * - GPIOB.
 * - GPIOC.
 * - GPIOD.
 * - GPIOE.
 * - GPIOF.
 * - GPIOG.
 * .
 * @section stm32_pal_2 STM32 PAL driver implementation features
 * The PAL driver implementation fully supports the following hardware
 * capabilities:
 * - 16 bits wide ports.
 * - Atomic set/reset functions.
 * - Atomic set+reset function (atomic bus operations).
 * - Output latched regardless of the pad setting.
 * - Direct read of input pads regardless of the pad setting.
 * .
 * @section stm32_pal_3 Supported PAL setup modes
 * The STM32 PAL driver supports the following I/O modes:
 * - @p PAL_MODE_RESET.
 * - @p PAL_MODE_UNCONNECTED.
 * - @p PAL_MODE_INPUT.
 * - @p PAL_MODE_INPUT_PULLUP.
 * - @p PAL_MODE_INPUT_PULLDOWN.
 * - @p PAL_MODE_INPUT_ANALOG.
 * - @p PAL_MODE_OUTPUT_PUSHPULL.
 * - @p PAL_MODE_OUTPUT_OPENDRAIN.
 * - @p PAL_MODE_STM32_ALTERNATE_PUSHPULL (non standard).
 * - @p PAL_MODE_STM32_ALTERNATE_OPENDRAIN (non standard).
 * .
 * Any attempt to setup an invalid mode is ignored.
 *
 * @section stm32_pal_4 Suboptimal behavior
 * The STM32 GPIO is less than optimal in several areas, the limitations should
 * be taken in account while using the PAL driver:
 * - Pad/port toggling operations are not atomic.
 * - Pad/group mode setup is not atomic.
 * - Writing on pads/groups/ports programmed as input with pull-up/down
 *   resistor can change the resistor setting because the output latch is
 *   used for resistor selection.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_PWM STM32 PWM Support
 * @brief TIMx peripherals as PWM generators support.
 *
 * @section stm32_pwm_1 Supported HW resources
 * - TIM1.
 * - TIM2.
 * - TIM3.
 * - TIM4.
 * .
 * @section stm32_pwm_2 STM32 PWM driver implementation features
 * - Each timer can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Four independent PWM channels per timer.
 * - Programmable TIMx interrupts priority level.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_SPI STM32 SPI Support
 * @brief SPI peripherals support.
 * @details The SPI driver supports the STM32 SPIs using DMA channels for
 *          improved performance.
 *
 * @section stm32_spi_1 Supported HW resources
 * - SPI1.
 * - SPI2.
 * - SPI3.
 * .
 * @section stm32_spi_2 STM32 SPI driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Each SPI can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Programmable interrupt priority levels for each SPI.
 * - DMA is used for receiving and transmitting.
 * - Programmable DMA bus priority for each DMA channel.
 * - Programmable DMA interrupt priority for each DMA channel.
 * - Programmable DMA error hook for each DMA channel.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_SERIAL STM32 USART Support (buffered)
 * @brief UART/USART peripherals support.
 *
 * @section stm32_serial_1 Supported HW resources
 * The serial driver can support any of the following hardware resources:
 * - USART1.
 * - USART2.
 * - USART3.
 * - UART4.
 * - UART5.
 * .
 * @section stm32_serial_2 STM32 Serial driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Each UART/USART can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Fully interrupt driven.
 * - Programmable priority levels for each UART/USART.
 * .
 * @ingroup STM32
 */

/**
 * @defgroup STM32_UART STM32 USART Support (unbuffered)
 * @brief UART/USART peripherals support.
 *
 * @section stm32_uart_1 Supported HW resources
 * The UART driver can support any of the following hardware resources:
 * - USART1.
 * - USART2.
 * - USART3.
 * .
 * @section stm32_uart_2 STM32 UART driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Each UART/USART can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Programmable interrupt priority levels for each UART/USART.
 * - DMA is used for receiving and transmitting.
 * - Programmable DMA bus priority for each DMA channel.
 * - Programmable DMA interrupt priority for each DMA channel.
 * - Programmable DMA error hook for each DMA channel.
 * .
 * @ingroup STM32
 */