/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011 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 STM32L1xx_DRIVERS STM32L1xx Drivers
 * @details This section describes all the supported drivers on the STM32L1xx
 *          platform and the implementation details of the single drivers.
 *
 * @ingroup platforms
 */

/**
 * @defgroup STM32L1xx_HAL STM32L1xx Initialization Support
 * @details The STM32L1xx HAL support is responsible for system initialization.
 *
 * @section stm32l1xx_hal_1 Supported HW resources
 * - PLL1.
 * - RCC.
 * - Flash.
 * .
 * @section stm32l1xx_hal_2 STM32L1xx HAL driver implementation features
 * - PLL 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 STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_ADC STM32L1xx ADC Support
 * @details The STM32L1xx ADC driver supports the ADC peripherals using DMA
 *          channels for maximum performance.
 *
 * @section stm32l1xx_adc_1 Supported HW resources
 * - ADC1.
 * - DMA1.
 * .
 * @section stm32l1xx_adc_2 STM32L1xx 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.
 * - DMA and ADC errors detection.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_EXT STM32L1xx EXT Support
 * @details The STM32L1xx EXT driver uses the EXTI peripheral.
 *
 * @section stm32l1xx_ext_1 Supported HW resources
 * - EXTI.
 * .
 * @section stm32l1xx_ext_2 STM32L1xx EXT driver implementation features
 * - Each EXTI channel can be independently enabled and programmed.
 * - Programmable EXTI interrupts priority level.
 * - Capability to work as event sources (WFE) rather than interrupt sources.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_GPT STM32L1xx GPT Support
 * @details The STM32L1xx GPT driver uses the TIMx peripherals.
 *
 * @section stm32l1xx_gpt_1 Supported HW resources
 * - TIM2.
 * - TIM3.
 * - TIM4.
 * .
 * @section stm32l1xx_gpt_2 STM32L1xx GPT driver implementation features
 * - Each timer can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Programmable TIMx interrupts priority level.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_ICU STM32L1xx ICU Support
 * @details The STM32L1xx ICU driver uses the TIMx peripherals.
 *
 * @section stm32l1xx_icu_1 Supported HW resources
 * - TIM2.
 * - TIM3.
 * - TIM4.
 * .
 * @section stm32l1xx_icu_2 STM32L1xx ICU driver implementation features
 * - Each timer can be independently enabled and programmed. Unused
 *   peripherals are left in low power mode.
 * - Programmable TIMx interrupts priority level.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_PAL STM32L1xx PAL Support
 * @details The STM32L1xx PAL driver uses the GPIO peripherals.
 *
 * @section stm32l1xx_pal_1 Supported HW resources
 * - GPIOA.
 * - GPIOB.
 * - GPIOC.
 * - GPIOD.
 * - GPIOE.
 * - GPIOH.
 * .
 * @section stm32l1xx_pal_2 STM32L1xx 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 stm32l1xx_pal_3 Supported PAL setup modes
 * The STM32L1xx 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_ALTERNATE (non standard).
 * .
 * Any attempt to setup an invalid mode is ignored.
 *
 * @section stm32l1xx_pal_4 Suboptimal behavior
 * The STM32L1xx 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.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_PWM STM32L1xx PWM Support
 * @details The STM32L1xx PWM driver uses the TIMx peripherals.
 *
 * @section stm32l1xx_pwm_1 Supported HW resources
 * - TIM1.
 * - TIM2.
 * - TIM3.
 * - TIM4.
 * - TIM5.
 * .
 * @section stm32l1xx_pwm_2 STM32L1xx 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 STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_SERIAL STM32L1xx Serial Support
 * @details The STM32L1xx Serial driver uses the USART/UART peripherals in a
 *          buffered, interrupt driven, implementation.
 *
 * @section stm32l1xx_serial_1 Supported HW resources
 * The serial driver can support any of the following hardware resources:
 * - USART1.
 * - USART2.
 * - USART3 (where present).
 * - UART4 (where present).
 * - UART5 (where present).
 * .
 * @section stm32l1xx_serial_2 STM32L1xx 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 STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_SPI STM32L1xx SPI Support
 * @details The SPI driver supports the STM32L1xx SPI peripherals using DMA
 *          channels for maximum performance.
 *
 * @section stm32l1xx_spi_1 Supported HW resources
 * - SPI1.
 * - SPI2.
 * - SPI3 (where present).
 * - DMA1.
 * - DMA2 (where present).
 * .
 * @section stm32l1xx_spi_2 STM32L1xx 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.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_UART STM32L1xx UART Support
 * @details The UART driver supports the STM32L1xx USART peripherals using DMA
 *          channels for maximum performance.
 *
 * @section stm32l1xx_uart_1 Supported HW resources
 * The UART driver can support any of the following hardware resources:
 * - USART1.
 * - USART2.
 * - USART3 (where present).
 * - UART4 (where present).
 * - DMA1.
 * - DMA2 (where present).
 * .
 * @section stm32l1xx_uart_2 STM32L1xx 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.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_USB STM32L1xx USB Support
 * @details The USB driver supports the STM32L1xx USB peripheral.
 *
 * @section stm32l1xx_usb_1 Supported HW resources
 * The USB driver can support any of the following hardware resources:
 * - USB.
 * .
 * @section stm32l1xx_usb_2 STM32L1xx USB driver implementation features
 * - Clock stop for reduced power usage when the driver is in stop state.
 * - Programmable interrupt priority levels.
 * - Each endpoint programmable in Control, Bulk and Interrupt modes.
 * .
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_PLATFORM_DRIVERS STM32L1xx Platform Drivers
 * @details Platform support drivers. Platform drivers do not implement HAL
 *          standard driver templates, their role is to support platform
 *          specific functionalities.
 *
 * @ingroup STM32L1xx_DRIVERS
 */

/**
 * @defgroup STM32L1xx_DMA STM32L1xx DMA Support
 * @details This DMA helper driver is used by the other drivers in order to
 *          access the shared DMA resources in a consistent way.
 *
 * @section stm32l1xx_dma_1 Supported HW resources
 * The DMA driver can support any of the following hardware resources:
 * - DMA1.
 * .
 * @section stm32l1xx_dma_2 STM32L1xx DMA driver implementation features
 * - Exports helper functions/macros to the other drivers that share the
 *   DMA resource.
 * - Automatic DMA clock stop when not in use by any driver.
 * - DMA streams and interrupt vectors sharing among multiple drivers.
 * .
 * @ingroup STM32L1xx_PLATFORM_DRIVERS
 */

/**
 * @defgroup STM32L1xx_RCC STM32L1xx RCC Support
 * @details This RCC helper driver is used by the other drivers in order to
 *          access the shared RCC resources in a consistent way.
 *
 * @section stm32f1xx_rcc_1 Supported HW resources
 * - RCC.
 * .
 * @section stm32l1xx_rcc_2 STM32L1xx RCC driver implementation features
 * - Peripherals reset.
 * - Peripherals clock enable.
 * - Periplerals clock disable.
 * .
 * @ingroup STM32L1xx_PLATFORM_DRIVERS
 */