path: root/os/hal/platforms/STM32L1xx/hal_lld.h

/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012 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/>.
*/

/**
 * @file    STM32L1xx/hal_lld.h
 * @brief   STM32L1xx HAL subsystem low level driver header.
 * @pre     This module requires the following macros to be defined in the
 *          @p board.h file:
 *          - STM32_LSECLK.
 *          - STM32_HSECLK.
 *          .
 *          One of the following macros must also be defined:
 *          - STM32L1XX_MD for Ultra Low Power Medium-density devices.
 *          .
 *
 * @addtogroup HAL
 * @{
 */

#ifndef _HAL_LLD_H_
#define _HAL_LLD_H_

#include "stm32.h"

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

/**
 * @brief   Defines the support for realtime counters in the HAL.
 */
#define HAL_IMPLEMENTS_COUNTERS TRUE

/**
 * @name    Platform identification
 * @{
 */
#define PLATFORM_NAME           "STM32L1 Ultra Low Power Medium Density"
/** @} */

/**
 * @name    Internal clock sources
 * @{
 */
#define STM32_HSICLK            16000000    /**< High speed internal clock. */
#define STM32_LSICLK            38000       /**< Low speed internal clock.  */
/** @} */

/**
 * @name    PWR_CR register bits definitions
 * @{
 */
#define STM32_VOS_MASK          (3 << 11)   /**< Core voltage mask.         */
#define STM32_VOS_1P8           (1 << 11)   /**< Core voltage 1.8 Volts.    */
#define STM32_VOS_1P5           (2 << 11)   /**< Core voltage 1.5 Volts.    */
#define STM32_VOS_1P2           (3 << 11)   /**< Core voltage 1.2 Volts.    */

#define STM32_PLS_MASK          (7 << 5)    /**< PLS bits mask.             */
#define STM32_PLS_LEV0          (0 << 5)    /**< PVD level 0.               */
#define STM32_PLS_LEV1          (1 << 5)    /**< PVD level 1.               */
#define STM32_PLS_LEV2          (2 << 5)    /**< PVD level 2.               */
#define STM32_PLS_LEV3          (3 << 5)    /**< PVD level 3.               */
#define STM32_PLS_LEV4          (4 << 5)    /**< PVD level 4.               */
#define STM32_PLS_LEV5          (5 << 5)    /**< PVD level 5.               */
#define STM32_PLS_LEV6          (6 << 5)    /**< PVD level 6.               */
#define STM32_PLS_LEV7          (7 << 5)    /**< PVD level 7.               */
/** @} */

/**
 * @name    RCC_CR register bits definitions
 * @{
 */
#define STM32_RTCPRE_MASK       (3 << 29)   /**< RTCPRE mask.               */
#define STM32_RTCPRE_DIV2       (0 << 29)   /**< HSE divided by 2.          */
#define STM32_RTCPRE_DIV4       (1 << 29)   /**< HSE divided by 4.          */
#define STM32_RTCPRE_DIV8       (2 << 29)   /**< HSE divided by 2.          */
#define STM32_RTCPRE_DIV16      (3 << 29)   /**< HSE divided by 16.         */
/** @} */

/**
 * @name    RCC_CFGR register bits definitions
 * @{
 */
#define STM32_SW_MSI            (0 << 0)    /**< SYSCLK source is MSI.      */
#define STM32_SW_HSI            (1 << 0)    /**< SYSCLK source is HSI.      */
#define STM32_SW_HSE            (2 << 0)    /**< SYSCLK source is HSE.      */
#define STM32_SW_PLL            (3 << 0)    /**< SYSCLK source is PLL.      */

#define STM32_HPRE_DIV1         (0 << 4)    /**< SYSCLK divided by 1.       */
#define STM32_HPRE_DIV2         (8 << 4)    /**< SYSCLK divided by 2.       */
#define STM32_HPRE_DIV4         (9 << 4)    /**< SYSCLK divided by 4.       */
#define STM32_HPRE_DIV8         (10 << 4)   /**< SYSCLK divided by 8.       */
#define STM32_HPRE_DIV16        (11 << 4)   /**< SYSCLK divided by 16.      */
#define STM32_HPRE_DIV64        (12 << 4)   /**< SYSCLK divided by 64.      */
#define STM32_HPRE_DIV128       (13 << 4)   /**< SYSCLK divided by 128.     */
#define STM32_HPRE_DIV256       (14 << 4)   /**< SYSCLK divided by 256.     */
#define STM32_HPRE_DIV512       (15 << 4)   /**< SYSCLK divided by 512.     */

#define STM32_PPRE1_DIV1        (0 << 8)    /**< HCLK divided by 1.         */
#define STM32_PPRE1_DIV2        (4 << 8)    /**< HCLK divided by 2.         */
#define STM32_PPRE1_DIV4        (5 << 8)    /**< HCLK divided by 4.         */
#define STM32_PPRE1_DIV8        (6 << 8)    /**< HCLK divided by 8.         */
#define STM32_PPRE1_DIV16       (7 << 8)    /**< HCLK divided by 16.        */

#define STM32_PPRE2_DIV1        (0 << 11)   /**< HCLK divided by 1.         */
#define STM32_PPRE2_DIV2        (4 << 11)   /**< HCLK divided by 2.         */
#define STM32_PPRE2_DIV4        (5 << 11)   /**< HCLK divided by 4.         */
#define STM32_PPRE2_DIV8        (6 << 11)   /**< HCLK divided by 8.         */
#define STM32_PPRE2_DIV16       (7 << 11)   /**< HCLK divided by 16.        */

#define STM32_PLLSRC_HSI        (0 << 16)   /**< PLL clock source is HSI.   */
#define STM32_PLLSRC_HSE        (1 << 16)   /**< PLL clock source is HSE.   */

#define STM32_MCOSEL_NOCLOCK    (0 << 24)   /**< No clock on MCO pin.       */
#define STM32_MCOSEL_SYSCLK     (1 << 24)   /**< SYSCLK on MCO pin.         */
#define STM32_MCOSEL_HSI        (2 << 24)   /**< HSI clock on MCO pin.      */
#define STM32_MCOSEL_MSI        (3 << 24)   /**< MSI clock on MCO pin.      */
#define STM32_MCOSEL_HSE        (4 << 24)   /**< HSE clock on MCO pin.      */
#define STM32_MCOSEL_PLL        (5 << 24)   /**< PLL clock on MCO pin.      */
#define STM32_MCOSEL_LSI        (6 << 24)   /**< LSI clock on MCO pin.      */
#define STM32_MCOSEL_LSE        (7 << 24)   /**< LSE clock on MCO pin.      */

#define STM32_MCOPRE_DIV1       (0 << 28)   /**< MCO divided by 1.          */
#define STM32_MCOPRE_DIV2       (1 << 28)   /**< MCO divided by 1.          */
#define STM32_MCOPRE_DIV4       (2 << 28)   /**< MCO divided by 1.          */
#define STM32_MCOPRE_DIV8       (3 << 28)   /**< MCO divided by 1.          */
#define STM32_MCOPRE_DIV16      (4 << 28)   /**< MCO divided by 1.          */
/** @} */

/**
 * @name    RCC_ICSCR register bits definitions
 * @{
 */
#define STM32_MSIRANGE_MASK     (7 << 13)   /**< MSIRANGE field mask.       */
#define STM32_MSIRANGE_64K      (0 << 13)   /**< 64kHz nominal.             */
#define STM32_MSIRANGE_128K     (1 << 13)   /**< 128kHz nominal.            */
#define STM32_MSIRANGE_256K     (2 << 13)   /**< 256kHz nominal.            */
#define STM32_MSIRANGE_512K     (3 << 13)   /**< 512kHz nominal.            */
#define STM32_MSIRANGE_1M       (4 << 13)   /**< 1MHz nominal.              */
#define STM32_MSIRANGE_2M       (5 << 13)   /**< 2MHz nominal.              */
#define STM32_MSIRANGE_4M       (6 << 13)   /**< 4MHz nominal               */
/** @} */

/**
 * @name    RCC_CSR register bits definitions
 * @{
 */
#define STM32_RTCSEL_MASK       (3 << 16)   /**< RTC source mask.           */
#define STM32_RTCSEL_NOCLOCK    (0 << 16)   /**< No RTC source.             */
#define STM32_RTCSEL_LSE        (1 << 16)   /**< RTC source is LSE.         */
#define STM32_RTCSEL_LSI        (2 << 16)   /**< RTC source is LSI.         */
#define STM32_RTCSEL_HSEDIV     (3 << 16)   /**< RTC source is HSE divided. */
/** @} */

/*===========================================================================*/
/* Platform capabilities.                                                    */
/*===========================================================================*/

/**
 * @name    STM32L1xx capabilities
 * @{
 */
/* ADC attributes.*/
#define STM32_HAS_ADC1          TRUE
#define STM32_HAS_ADC2          FALSE
#define STM32_HAS_ADC3          FALSE

/* CAN attributes.*/
#define STM32_HAS_CAN1          FALSE
#define STM32_HAS_CAN2          FALSE

/* DAC attributes.*/
#define STM32_HAS_DAC           TRUE

/* DMA attributes.*/
#define STM32_ADVANCED_DMA      FALSE
#define STM32_HAS_DMA1          TRUE
#define STM32_HAS_DMA2          FALSE

/* ETH attributes.*/
#define STM32_HAS_ETH           FALSE

/* EXTI attributes.*/
#define STM32_EXTI_NUM_CHANNELS 23

/* GPIO attributes.*/
#define STM32_HAS_GPIOA         TRUE
#define STM32_HAS_GPIOB         TRUE
#define STM32_HAS_GPIOC         TRUE
#define STM32_HAS_GPIOD         TRUE
#define STM32_HAS_GPIOE         TRUE
#define STM32_HAS_GPIOF         FALSE
#define STM32_HAS_GPIOG         FALSE
#define STM32_HAS_GPIOH         TRUE
#define STM32_HAS_GPIOI         FALSE

/* I2C attributes.*/
#define STM32_HAS_I2C1          TRUE
#define STM32_I2C1_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 7))
#define STM32_I2C1_RX_DMA_CHN   0x00000000
#define STM32_I2C1_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 6))
#define STM32_I2C1_TX_DMA_CHN   0x00000000

#define STM32_HAS_I2C2          TRUE
#define STM32_I2C2_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 5))
#define STM32_I2C2_RX_DMA_CHN   0x00000000
#define STM32_I2C2_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 4))
#define STM32_I2C2_TX_DMA_CHN   0x00000000

#define STM32_HAS_I2C3          FALSE
#define STM32_I2C3_RX_DMA_MSK   0
#define STM32_I2C3_RX_DMA_CHN   0x00000000
#define STM32_I2C3_TX_DMA_MSK   0
#define STM32_I2C3_TX_DMA_CHN   0x00000000

/* RTC attributes.*/
#define STM32_HAS_RTC           TRUE
#define STM32_RTC_HAS_SUBSECONDS FALSE
#define STM32_RTC_IS_CALENDAR   TRUE

/* SDIO attributes.*/
#define STM32_HAS_SDIO          FALSE

/* SPI attributes.*/
#define STM32_HAS_SPI1          TRUE
#define STM32_SPI1_RX_DMA_MSK   STM32_DMA_STREAM_ID_MSK(1, 2)
#define STM32_SPI1_RX_DMA_CHN   0x00000000
#define STM32_SPI1_TX_DMA_MSK   STM32_DMA_STREAM_ID_MSK(1, 3)
#define STM32_SPI1_TX_DMA_CHN   0x00000000

#define STM32_HAS_SPI2          TRUE
#define STM32_SPI2_RX_DMA_MSK   STM32_DMA_STREAM_ID_MSK(1, 4)
#define STM32_SPI2_RX_DMA_CHN   0x00000000
#define STM32_SPI2_TX_DMA_MSK   STM32_DMA_STREAM_ID_MSK(1, 5)
#define STM32_SPI2_TX_DMA_CHN   0x00000000

#define STM32_HAS_SPI3          FALSE
#define STM32_SPI3_RX_DMA_MSK   0
#define STM32_SPI3_RX_DMA_CHN   0x00000000
#define STM32_SPI3_TX_DMA_MSK   0
#define STM32_SPI3_TX_DMA_CHN   0x00000000

/* TIM attributes.*/
#define STM32_HAS_TIM1          FALSE
#define STM32_HAS_TIM2          TRUE
#define STM32_HAS_TIM3          TRUE
#define STM32_HAS_TIM4          TRUE
#define STM32_HAS_TIM5          FALSE
#define STM32_HAS_TIM6          TRUE
#define STM32_HAS_TIM7          TRUE
#define STM32_HAS_TIM8          FALSE
#define STM32_HAS_TIM9          TRUE
#define STM32_HAS_TIM10         TRUE
#define STM32_HAS_TIM11         TRUE
#define STM32_HAS_TIM12         FALSE
#define STM32_HAS_TIM13         FALSE
#define STM32_HAS_TIM14         FALSE
#define STM32_HAS_TIM15         FALSE
#define STM32_HAS_TIM16         FALSE
#define STM32_HAS_TIM17         FALSE

/* USART attributes.*/
#define STM32_HAS_USART1        TRUE
#define STM32_USART1_RX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 5))
#define STM32_USART1_RX_DMA_CHN 0x00000000
#define STM32_USART1_TX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 4))
#define STM32_USART1_TX_DMA_CHN 0x00000000

#define STM32_HAS_USART2        TRUE
#define STM32_USART2_RX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 6))
#define STM32_USART2_RX_DMA_CHN 0x00000000
#define STM32_USART2_TX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 7))
#define STM32_USART2_TX_DMA_CHN 0x00000000

#define STM32_HAS_USART3        TRUE
#define STM32_USART3_RX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 3))
#define STM32_USART3_RX_DMA_CHN 0x00000000
#define STM32_USART3_TX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 2))
#define STM32_USART3_TX_DMA_CHN 0x00000000

#define STM32_HAS_UART4         FALSE
#define STM32_UART4_RX_DMA_MSK  0
#define STM32_UART4_RX_DMA_CHN  0x00000000
#define STM32_UART4_TX_DMA_MSK  0
#define STM32_UART4_TX_DMA_CHN  0x00000000

#define STM32_HAS_UART5         FALSE
#define STM32_UART5_RX_DMA_MSK  0
#define STM32_UART5_RX_DMA_CHN  0x00000000
#define STM32_UART5_TX_DMA_MSK  0
#define STM32_UART5_TX_DMA_CHN  0x00000000

#define STM32_HAS_USART6        FALSE
#define STM32_USART6_RX_DMA_MSK 0
#define STM32_USART6_RX_DMA_CHN 0x00000000
#define STM32_USART6_TX_DMA_MSK 0
#define STM32_USART6_TX_DMA_CHN 0x00000000

/* USB attributes.*/
#define STM32_HAS_USB           TRUE
#define STM32_HAS_OTG1          FALSE
#define STM32_HAS_OTG2          FALSE
/** @} */

/*===========================================================================*/
/* Platform specific friendly IRQ names.                                     */
/*===========================================================================*/

/**
 * @name  IRQ VECTOR names
 * @{
 */
#define WWDG_IRQHandler         Vector40    /**< Window Watchdog.           */
#define PVD_IRQHandler          Vector44    /**< PVD through EXTI Line
                                                 detect.                    */
#define TAMPER_STAMP_IRQHandler Vector48    /**< Tamper and Time Stamp
                                                 through EXTI.              */
#define RTC_WKUP_IRQHandler     Vector4C    /**< RTC Wakeup Timer through
                                                 EXTI.                      */
#define FLASH_IRQHandler        Vector50    /**< Flash.                     */
#define RCC_IRQHandler          Vector54    /**< RCC.                       */
#define EXTI0_IRQHandler        Vector58    /**< EXTI Line 0.               */
#define EXTI1_IRQHandler        Vector5C    /**< EXTI Line 1.               */
#define EXTI2_IRQHandler        Vector60    /**< EXTI Line 2.               */
#define EXTI3_IRQHandler        Vector64    /**< EXTI Line 3.               */
#define EXTI4_IRQHandler        Vector68    /**< EXTI Line 4.               */
#define DMA1_Ch1_IRQHandler     Vector6C    /**< DMA1 Channel 1.            */
#define DMA1_Ch2_IRQHandler     Vector70    /**< DMA1 Channel 2.            */
#define DMA1_Ch3_IRQHandler     Vector74    /**< DMA1 Channel 3.            */
#define DMA1_Ch4_IRQHandler     Vector78    /**< DMA1 Channel 4.            */
#define DMA1_Ch5_IRQHandler     Vector7C    /**< DMA1 Channel 5.            */
#define DMA1_Ch6_IRQHandler     Vector80    /**< DMA1 Channel 6.            */
#define DMA1_Ch7_IRQHandler     Vector84    /**< DMA1 Channel 7.            */
#define ADC1_IRQHandler         Vector88    /**< ADC1.                      */
#define USB_HP_IRQHandler       Vector8C    /**< USB High Priority.         */
#define USB_LP_IRQHandler       Vector90    /**< USB Low Priority.          */
#define DAC_IRQHandler          Vector94    /**< DAC.                       */
#define COMP_IRQHandler         Vector98    /**< Comparator through EXTI.   */
#define EXTI9_5_IRQHandler      Vector9C    /**< EXTI Line 9..5.            */
#define TIM9_IRQHandler         VectorA0    /**< TIM9.                      */
#define TIM10_IRQHandler        VectorA4    /**< TIM10.                     */
#define TIM11_IRQHandler        VectorA8    /**< TIM11.                     */
#define LCD_IRQHandler          VectorAC    /**< LCD.                       */
#define TIM2_IRQHandler         VectorB0    /**< TIM2.                      */
#define TIM3_IRQHandler         VectorB4    /**< TIM3.                      */
#define TIM4_IRQHandler         VectorB8    /**< TIM4.                      */
#define I2C1_EV_IRQHandler      VectorBC    /**< I2C1 Event.                */
#define I2C1_ER_IRQHandler      VectorC0    /**< I2C1 Error.                */
#define I2C2_EV_IRQHandler      VectorC4    /**< I2C2 Event.                */
#define I2C2_ER_IRQHandler      VectorC8    /**< I2C2 Error.                */
#define SPI1_IRQHandler         VectorCC    /**< SPI1.                      */
#define SPI2_IRQHandler         VectorD0    /**< SPI2.                      */
#define USART1_IRQHandler       VectorD4    /**< USART1.                    */
#define USART2_IRQHandler       VectorD8    /**< USART2.                    */
#define USART3_IRQHandler       VectorDC    /**< USART3.                    */
#define EXTI15_10_IRQHandler    VectorE0    /**< EXTI Line 15..10.          */
#define RTC_Alarm_IRQHandler    VectorE4    /**< RTC Alarm through EXTI.    */
#define USB_FS_WKUP_IRQHandler  VectorE8    /**< USB Wakeup from suspend.   */
#define TIM6_IRQHandler         VectorEC    /**< TIM6.                      */
#define TIM7_IRQHandler         VectorF0    /**< TIM7.                      */
/** @} */

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/**
 * @name    Configuration options
 * @{
 */
/**
 * @brief   Disables the PWR/RCC initialization in the HAL.
 */
#if !defined(STM32_NO_INIT) || defined(__DOXYGEN__)
#define STM32_NO_INIT               FALSE
#endif

/**
 * @brief   Core voltage selection.
 * @note    This setting affects all the performance and clock related
 *          settings, the maximum performance is only obtainable selecting
 *          the maximum voltage.
 */
#if !defined(STM32_VOS) || defined(__DOXYGEN__)
#define STM32_VOS                   STM32_VOS_1P8
#endif

/**
 * @brief   Enables or disables the programmable voltage detector.
 */
#if !defined(STM32_PVD_ENABLE) || defined(__DOXYGEN__)
#define STM32_PVD_ENABLE            FALSE
#endif

/**
 * @brief   Sets voltage level for programmable voltage detector.
 */
#if !defined(STM32_PLS) || defined(__DOXYGEN__)
#define STM32_PLS                   STM32_PLS_LEV0
#endif

/**
 * @brief   Enables or disables the HSI clock source.
 */
#if !defined(STM32_HSI_ENABLED) || defined(__DOXYGEN__)
#define STM32_HSI_ENABLED           TRUE
#endif

/**
 * @brief   Enables or disables the LSI clock source.
 */
#if !defined(STM32_LSI_ENABLED) || defined(__DOXYGEN__)
#define STM32_LSI_ENABLED           TRUE
#endif

/**
 * @brief   Enables or disables the HSE clock source.
 */
#if !defined(STM32_HSE_ENABLED) || defined(__DOXYGEN__)
#define STM32_HSE_ENABLED           FALSE
#endif

/**
 * @brief   Enables or disables the LSE clock source.
 */
#if !defined(STM32_HSE_ENABLED) || defined(__DOXYGEN__)
#define STM32_LSE_ENABLED           FALSE
#endif

/**
 * @brief   ADC clock setting.
 */
#if !defined(STM32_ADC_CLOCK_ENABLED) || defined(__DOXYGEN__)
#define STM32_ADC_CLOCK_ENABLED     TRUE
#endif

/**
 * @brief   USB clock setting.
 */
#if !defined(STM32_USB_CLOCK_ENABLED) || defined(__DOXYGEN__)
#define STM32_USB_CLOCK_ENABLED     TRUE
#endif

/**
 * @brief   MSI frequency setting.
 */
#if !defined(STM32_MSIRANGE) || defined(__DOXYGEN__)
#define STM32_MSIRANGE              STM32_MSIRANGE_2M
#endif

/**
 * @brief   Main clock source selection.
 * @note    If the selected clock source is not the PLL then the PLL is not
 *          initialized and started.
 * @note    The default value is calculated for a 32MHz system clock from
 *          the internal 16MHz HSI clock.
 */
#if !defined(STM32_SW) || defined(__DOXYGEN__)
#define STM32_SW                    STM32_SW_PLL
#endif

/**
 * @brief   Clock source for the PLL.
 * @note    This setting has only effect if the PLL is selected as the
 *          system clock source.
 * @note    The default value is calculated for a 32MHz system clock from
 *          the internal 16MHz HSI clock.
 */
#if !defined(STM32_PLLSRC) || defined(__DOXYGEN__)
#define STM32_PLLSRC                STM32_PLLSRC_HSI
#endif

/**
 * @brief   PLL multiplier value.
 * @note    The allowed values are 3, 4, 6, 8, 12, 16, 32, 48.
 * @note    The default value is calculated for a 32MHz system clock from
 *          the internal 16MHz HSI clock.
 */
#if !defined(STM32_PLLMUL_VALUE) || defined(__DOXYGEN__)
#define STM32_PLLMUL_VALUE          6
#endif

/**
 * @brief   PLL divider value.
 * @note    The allowed values are 2, 3, 4.
 * @note    The default value is calculated for a 32MHz system clock from
 *          the internal 16MHz HSI clock.
 */
#if !defined(STM32_PLLDIV_VALUE) || defined(__DOXYGEN__)
#define STM32_PLLDIV_VALUE          3
#endif

/**
 * @brief   AHB prescaler value.
 * @note    The default value is calculated for a 32MHz system clock from
 *          the internal 16MHz HSI clock.
 */
#if !defined(STM32_HPRE) || defined(__DOXYGEN__)
#define STM32_HPRE                  STM32_HPRE_DIV1
#endif

/**
 * @brief   APB1 prescaler value.
 */
#if !defined(STM32_PPRE1) || defined(__DOXYGEN__)
#define STM32_PPRE1                 STM32_PPRE1_DIV1
#endif

/**
 * @brief   APB2 prescaler value.
 */
#if !defined(STM32_PPRE2) || defined(__DOXYGEN__)
#define STM32_PPRE2                 STM32_PPRE2_DIV1
#endif

/**
 * @brief   MCO clock source.
 */
#if !defined(STM32_MCOSEL) || defined(__DOXYGEN__)
#define STM32_MCOSEL                STM32_MCOSEL_NOCLOCK
#endif

/**
 * @brief   MCO divider setting.
 */
#if !defined(STM32_MCOPRE) || defined(__DOXYGEN__)
#define STM32_MCOPRE                STM32_MCOPRE_DIV1
#endif

/**
 * @brief   Clock source for the RTC/LCD.
 */
#if !defined(STM32_RTCSEL) || defined(__DOXYGEN__)
#define STM32_RTCSEL                STM32_RTCSEL_LSE
#endif

/**
 * @brief   HSE divider toward RTC setting.
 */
#if !defined(STM32_RTCSEL) || defined(__DOXYGEN__)
#define STM32_RTCPRE                STM32_RTCPRE_DIV2
#endif
/** @} */

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

/* Voltage related limits.*/
#if (STM32_VOS == STM32_VOS_1P8) || defined(__DOXYGEN__)
/**
 * @brief   Maximum HSE clock frequency at current voltage setting.
 */
#define STM32_HSECLK_MAX            32000000

/**
 * @brief   Maximum SYSCLK clock frequency at current voltage setting.
 */
#define STM32_SYSCLK_MAX            32000000

/**
 * @brief   Maximum VCO clock frequency at current voltage setting.
 */
#define STM32_PLLVCO_MAX            96000000

/**
 * @brief   Minimum VCO clock frequency at current voltage setting.
 */
#define STM32_PLLVCO_MIN            6000000

/**
 * @brief   Maximum APB1 clock frequency.
 */
#define STM32_PCLK1_MAX             32000000

/**
 * @brief   Maximum APB2 clock frequency.
 */
#define STM32_PCLK2_MAX             32000000

/**
 * @brief   Maximum frequency not requiring a wait state for flash accesses.
 */
#define STM32_0WS_THRESHOLD         16000000

/**
 * @brief   HSI availability at current voltage settings.
 */
#define STM32_HSI_AVAILABLE         TRUE

#elif STM32_VOS == STM32_VOS_1P5
#define STM32_HSECLK_MAX            16000000
#define STM32_SYSCLK_MAX            16000000
#define STM32_PLLVCO_MAX            48000000
#define STM32_PLLVCO_MIN            6000000
#define STM32_PCLK1_MAX             16000000
#define STM32_PCLK2_MAX             16000000
#define STM32_0WS_THRESHOLD         8000000
#define STM32_HSI_AVAILABLE         TRUE
#elif STM32_VOS == STM32_VOS_1P2
#define STM32_HSECLK_MAX            4000000
#define STM32_SYSCLK_MAX            4000000
#define STM32_PLLVCO_MAX            24000000
#define STM32_PLLVCO_MIN            6000000
#define STM32_PCLK1_MAX             4000000
#define STM32_PCLK2_MAX             4000000
#define STM32_0WS_THRESHOLD         2000000
#define STM32_HSI_AVAILABLE         FALSE
#else
#error "invalid STM32_VOS value specified"
#endif

/* HSI related checks.*/
#if STM32_HSI_ENABLED
#if !STM32_HSI_AVAILABLE
  #error "impossible to activate HSI under the current voltage settings"
#endif
#else /* !STM32_HSI_ENABLED */
#if STM32_ADC_CLOCK_ENABLED ||                                              \
    (STM32_SW == STM32_SW_HSI) ||                                           \
    ((STM32_SW == STM32_SW_PLL) &&                                          \
     (STM32_PLLSRC == STM32_PLLSRC_HSI)) ||                                 \
    (STM32_MCOSEL == STM32_MCOSEL_HSI) ||                                   \
    ((STM32_MCOSEL == STM32_MCOSEL_PLL) &&                                  \
     (STM32_PLLSRC == STM32_PLLSRC_HSI))
#error "required HSI clock is not enabled"
#endif
#endif /* !STM32_HSI_ENABLED */

/* HSE related checks.*/
#if STM32_HSE_ENABLED
#if STM32_HSECLK == 0
#error "impossible to activate HSE"
#endif
#if (STM32_HSECLK < 1000000) || (STM32_HSECLK > STM32_HSECLK_MAX)
#error "STM32_HSECLK outside acceptable range (1MHz...STM32_HSECLK_MAX)"
#endif
#else /* !STM32_HSE_ENABLED */
#if (STM32_SW == STM32_SW_HSE) ||                                           \
    ((STM32_SW == STM32_SW_PLL) &&                                          \
     (STM32_PLLSRC == STM32_PLLSRC_HSE)) ||                                 \
    (STM32_MCOSEL == STM32_MCOSEL_HSE) ||                                   \
    ((STM32_MCOSEL == STM32_MCOSEL_PLL) &&                                  \
     (STM32_PLLSRC == STM32_PLLSRC_HSE)) ||                                 \
    (STM_RTC_SOURCE == STM32_RTCSEL_HSEDIV)
#error "required HSE clock is not enabled"
#endif
#endif /* !STM32_HSE_ENABLED */

/* LSI related checks.*/
#if STM32_LSI_ENABLED
#else /* !STM32_LSI_ENABLED */
#if STM_RTCCLK == STM32_LSICLK
#error "required LSI clock is not enabled"
#endif
#endif /* !STM32_LSI_ENABLED */

/* LSE related checks.*/
#if STM32_LSE_ENABLED
#if (STM32_LSECLK == 0)
#error "impossible to activate LSE"
#endif
#if (STM32_LSECLK < 1000) || (STM32_LSECLK > 1000000)
#error "STM32_LSECLK outside acceptable range (1...1000kHz)"
#endif
#else /* !STM32_LSE_ENABLED */
#if STM_RTCCLK == STM32_LSECLK
#error "required LSE clock is not enabled"
#endif
#endif /* !STM32_LSE_ENABLED */

/* PLL related checks.*/
#if STM32_USB_CLOCK_ENABLED ||                                              \
    (STM32_SW == STM32_SW_PLL) ||                                           \
    (STM32_MCOSEL == STM32_MCOSEL_PLL) ||                                   \
    defined(__DOXYGEN__)
/**
 * @brief   PLL activation flag.
 */
#define STM32_ACTIVATE_PLL          TRUE
#else
#define STM32_ACTIVATE_PLL          FALSE
#endif

/**
 * @brief   PLLMUL field.
 */
#if (STM32_PLLMUL_VALUE == 3) || defined(__DOXYGEN__)
#define STM32_PLLMUL                (0 << 18)
#elif STM32_PLLMUL_VALUE == 4
#define STM32_PLLMUL                (1 << 18)
#elif STM32_PLLMUL_VALUE == 6
#define STM32_PLLMUL                (2 << 18)
#elif STM32_PLLMUL_VALUE == 8
#define STM32_PLLMUL                (3 << 18)
#elif STM32_PLLMUL_VALUE == 12
#define STM32_PLLMUL                (4 << 18)
#elif STM32_PLLMUL_VALUE == 16
#define STM32_PLLMUL                (5 << 18)
#elif STM32_PLLMUL_VALUE == 24
#define STM32_PLLMUL                (6 << 18)
#elif STM32_PLLMUL_VALUE == 32
#define STM32_PLLMUL                (7 << 18)
#elif STM32_PLLMUL_VALUE == 48
#define STM32_PLLMUL                (8 << 18)
#else
#error "invalid STM32_PLLMUL_VALUE value specified"
#endif

/**
 * @brief   PLLDIV field.
 */
#if (STM32_PLLDIV_VALUE == 2) || defined(__DOXYGEN__)
#define STM32_PLLDIV                (1 << 22)
#elif STM32_PLLDIV_VALUE == 3
#define STM32_PLLDIV                (2 << 22)
#elif STM32_PLLDIV_VALUE == 4
#define STM32_PLLDIV                (3 << 22)
#else
#error "invalid STM32_PLLDIV_VALUE value specified"
#endif

/**
 * @brief   PLL input clock frequency.
 */
#if (STM32_PLLSRC == STM32_PLLSRC_HSE) || defined(__DOXYGEN__)
#define STM32_PLLCLKIN              STM32_HSECLK
#elif STM32_PLLSRC == STM32_PLLSRC_HSI
#define STM32_PLLCLKIN              STM32_HSICLK
#else
#error "invalid STM32_PLLSRC value specified"
#endif

/* PLL input frequency range check.*/
#if (STM32_PLLCLKIN < 2000000) || (STM32_PLLCLKIN > 24000000)
#error "STM32_PLLCLKIN outside acceptable range (2...24MHz)"
#endif

/**
 * @brief   PLL VCO frequency.
 */
#define STM32_PLLVCO                (STM32_PLLCLKIN * STM32_PLLMUL_VALUE)

/* PLL output frequency range check.*/
#if (STM32_PLLVCO < STM32_PLLVCO_MIN) || (STM32_PLLVCO > STM32_PLLVCO_MAX)
#error "STM32_PLLVCO outside acceptable range (STM32_PLLVCO_MIN...STM32_PLLVCO_MAX)"
#endif

/**
 * @brief   PLL output clock frequency.
 */
#define STM32_PLLCLKOUT             (STM32_PLLVCO / STM32_PLLDIV_VALUE)

/* PLL output frequency range check.*/
#if (STM32_PLLCLKOUT < 2000000) || (STM32_PLLCLKOUT > 32000000)
#error "STM32_PLLCLKOUT outside acceptable range (2...32MHz)"
#endif

/**
 * @brief   MSI frequency.
 * @note    Values are taken from the STM8Lxx datasheet.
 */
#if STM32_MSIRANGE == STM32_MSIRANGE_64K
#define STM32_MSICLK                65500
#elif STM32_MSIRANGE == STM32_MSIRANGE_128K
#define STM32_MSICLK                131000
#elif STM32_MSIRANGE == STM32_MSIRANGE_256K
#define STM32_MSICLK                262000
#elif STM32_MSIRANGE == STM32_MSIRANGE_512K
#define STM32_MSICLK                524000
#elif STM32_MSIRANGE == STM32_MSIRANGE_1M
#define STM32_MSICLK                1050000
#elif STM32_MSIRANGE == STM32_MSIRANGE_2M
#define STM32_MSICLK                2100000
#elif STM32_MSIRANGE == STM32_MSIRANGE_4M
#define STM32_MSICLK                4200000
#else
#error "invalid STM32_MSIRANGE value specified"
#endif

/**
 * @brief   System clock source.
 */
#if STM32_NO_INIT || defined(__DOXYGEN__)
#define STM32_SYSCLK                2100000
#elif (STM32_SW == STM32_SW_MSI)
#define STM32_SYSCLK                STM32_MSICLK
#elif (STM32_SW == STM32_SW_HSI)
#define STM32_SYSCLK                STM32_HSICLK
#elif (STM32_SW == STM32_SW_HSE)
#define STM32_SYSCLK                STM32_HSECLK
#elif (STM32_SW == STM32_SW_PLL)
#define STM32_SYSCLK                STM32_PLLCLKOUT
#else
#error "invalid STM32_SW value specified"
#endif

/* Check on the system clock.*/
#if STM32_SYSCLK > STM32_SYSCLK_MAX
#error "STM32_SYSCLK above maximum rated frequency (STM32_SYSCLK_MAX)"
#endif

/**
 * @brief   AHB frequency.
 */
#if (STM32_HPRE == STM32_HPRE_DIV1) || defined(__DOXYGEN__)
#define STM32_HCLK                  (STM32_SYSCLK / 1)
#elif STM32_HPRE == STM32_HPRE_DIV2
#define STM32_HCLK                  (STM32_SYSCLK / 2)
#elif STM32_HPRE == STM32_HPRE_DIV4
#define STM32_HCLK                  (STM32_SYSCLK / 4)
#elif STM32_HPRE == STM32_HPRE_DIV8
#define STM32_HCLK                  (STM32_SYSCLK / 8)
#elif STM32_HPRE == STM32_HPRE_DIV16
#define STM32_HCLK                  (STM32_SYSCLK / 16)
#elif STM32_HPRE == STM32_HPRE_DIV64
#define STM32_HCLK                  (STM32_SYSCLK / 64)
#elif STM32_HPRE == STM32_HPRE_DIV128
#define STM32_HCLK                  (STM32_SYSCLK / 128)
#elif STM32_HPRE == STM32_HPRE_DIV256
#define STM32_HCLK                  (STM32_SYSCLK / 256)
#elif STM32_HPRE == STM32_HPRE_DIV512
#define STM32_HCLK                  (STM32_SYSCLK / 512)
#else
#error "invalid STM32_HPRE value specified"
#endif

/* AHB frequency check.*/
#if STM32_HCLK > STM32_SYSCLK_MAX
#error "STM32_HCLK exceeding maximum frequency (STM32_SYSCLK_MAX)"
#endif

/**
 * @brief   APB1 frequency.
 */
#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
#define STM32_PCLK1                 (STM32_HCLK / 1)
#elif STM32_PPRE1 == STM32_PPRE1_DIV2
#define STM32_PCLK1                 (STM32_HCLK / 2)
#elif STM32_PPRE1 == STM32_PPRE1_DIV4
#define STM32_PCLK1                 (STM32_HCLK / 4)
#elif STM32_PPRE1 == STM32_PPRE1_DIV8
#define STM32_PCLK1                 (STM32_HCLK / 8)
#elif STM32_PPRE1 == STM32_PPRE1_DIV16
#define STM32_PCLK1                 (STM32_HCLK / 16)
#else
#error "invalid STM32_PPRE1 value specified"
#endif

/* APB1 frequency check.*/
#if STM32_PCLK1 > STM32_PCLK1_MAX
#error "STM32_PCLK1 exceeding maximum frequency (STM32_PCLK1_MAX)"
#endif

/**
 * @brief   APB2 frequency.
 */
#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
#define STM32_PCLK2                 (STM32_HCLK / 1)
#elif STM32_PPRE2 == STM32_PPRE2_DIV2
#define STM32_PCLK2                 (STM32_HCLK / 2)
#elif STM32_PPRE2 == STM32_PPRE2_DIV4
#define STM32_PCLK2                 (STM32_HCLK / 4)
#elif STM32_PPRE2 == STM32_PPRE2_DIV8
#define STM32_PCLK2                 (STM32_HCLK / 8)
#elif STM32_PPRE2 == STM32_PPRE2_DIV16
#define STM32_PCLK2                 (STM32_HCLK / 16)
#else
#error "invalid STM32_PPRE2 value specified"
#endif

/* APB2 frequency check.*/
#if STM32_PCLK2 > STM32_PCLK2_MAX
#error "STM32_PCLK2 exceeding maximum frequency (STM32_PCLK2_MAX)"
#endif

/**
 * @brief   MCO divider clock.
 */
#if (STM32_MCOSEL == STM32_MCOSEL_NOCLOCK) || defined(__DOXYGEN__)
#define STM_MCODIVCLK               0
#elif STM32_MCOSEL == STM32_MCOSEL_HSI
#define STM_MCODIVCLK               STM32_HSICLK
#elif STM32_MCOSEL == STM32_MCOSEL_MSI
#define STM_MCODIVCLK               STM32_MSICLK
#elif STM32_MCOSEL == STM32_MCOSEL_HSE
#define STM_MCODIVCLK               STM32_HSECLK
#elif STM32_MCOSEL == STM32_MCOSEL_PLL
#define STM_MCODIVCLK               STM32_PLLCLKOUT
#elif STM32_MCOSEL == STM32_MCOSEL_LSI
#define STM_MCODIVCLK               STM32_LSICLK
#elif STM32_MCOSEL == STM32_MCOSEL_LSE
#define STM_MCODIVCLK               STM32_LSECLK
#else
#error "invalid STM32_MCOSEL value specified"
#endif

/**
 * @brief   MCO output pin clock.
 */
#if (STM32_MCOPRE == STM32_MCOPRE_DIV1) || defined(__DOXYGEN__)
#define STM_MCOCLK                  STM_MCODIVCLK
#elif STM32_MCOPRE == STM32_MCOPRE_DIV2
#define STM_MCOCLK                  (STM_MCODIVCLK / 2)
#elif STM32_MCOPRE == STM32_MCOPRE_DIV4
#define STM_MCOCLK                  (STM_MCODIVCLK / 4)
#elif STM32_MCOPRE == STM32_MCOPRE_DIV8
#define STM_MCOCLK                  (STM_MCODIVCLK / 8)
#elif STM32_MCOPRE == STM32_MCOPRE_DIV16
#define STM_MCOCLK                  (STM_MCODIVCLK / 16)
#else
#error "invalid STM32_MCOPRE value specified"
#endif

/**
 * @brief   HSE divider toward RTC clock.
 */
#if (STM32_RTCPRE == STM32_RTCPRE_DIV2) || defined(__DOXYGEN__)
#define STM32_HSEDIVCLK             (STM32_HSECLK / 2)
#elif (STM32_RTCPRE == STM32_RTCPRE_DIV4) || defined(__DOXYGEN__)
#define STM32_HSEDIVCLK             (STM32_HSECLK / 4)
#elif (STM32_RTCPRE == STM32_RTCPRE_DIV8) || defined(__DOXYGEN__)
#define STM32_HSEDIVCLK             (STM32_HSECLK / 8)
#elif (STM32_RTCPRE == STM32_RTCPRE_DIV16) || defined(__DOXYGEN__)
#define STM32_HSEDIVCLK             (STM32_HSECLK / 16)
#else
#error "invalid STM32_RTCPRE value specified"
#endif

/**
 * @brief   RTC/LCD clock.
 */
#if (STM32_RTCSEL == STM32_RTCSEL_NOCLOCK) || defined(__DOXYGEN__)
#define STM_RTCCLK                  0
#elif STM32_RTCSEL == STM32_RTCSEL_LSE
#define STM_RTCCLK                  STM32_LSECLK
#elif STM32_RTCSEL == STM32_RTCSEL_LSI
#define STM_RTCCLK                  STM32_LSICLK
#elif STM32_RTCSEL == STM32_RTCSEL_HSEDIV
#define STM_RTCCLK                  STM32_HSEDIVCLK
#else
#error "invalid STM32_RTCSEL value specified"
#endif

/**
 * @brief   ADC frequency.
 */
#define STM32_ADCCLK                STM32_HSICLK

/**
 * @brief   USB frequency.
 */
#define STM32_USBCLK                (STM32_PLLVCO / 2)

/**
 * @brief   Timers 2, 3, 4, 6, 7 clock.
 */
#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
#define STM32_TIMCLK1               (STM32_PCLK1 * 1)
#else
#define STM32_TIMCLK1               (STM32_PCLK1 * 2)
#endif

/**
 * @brief   Timers 9, 10, 11 clock.
 */
#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
#define STM32_TIMCLK2               (STM32_PCLK2 * 1)
#else
#define STM32_TIMCLK2               (STM32_PCLK2 * 2)
#endif

/**
 * @brief   Flash settings.
 */
#if (STM32_HCLK <= STM32_0WS_THRESHOLD) || defined(__DOXYGEN__)
#define STM32_FLASHBITS1            0x00000000
#else
#define STM32_FLASHBITS1            0x00000004
#define STM32_FLASHBITS2            0x00000007
#endif

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/

/**
 * @brief   Type representing a system clock frequency.
 */
typedef uint32_t halclock_t;

/**
 * @brief   Type of the realtime free counter value.
 */
typedef uint32_t halrtcnt_t;

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/**
 * @brief   Returns the current value of the system free running counter.
 * @note    This service is implemented by returning the content of the
 *          DWT_CYCCNT register.
 *
 * @return              The value of the system free running counter of
 *                      type halrtcnt_t.
 *
 * @notapi
 */
#define hal_lld_get_counter_value()         DWT_CYCCNT

/**
 * @brief   Realtime counter frequency.
 * @note    The DWT_CYCCNT register is incremented directly by the system
 *          clock so this function returns STM32_HCLK.
 *
 * @return              The realtime counter frequency of type halclock_t.
 *
 * @notapi
 */
#define hal_lld_get_counter_frequency()     STM32_HCLK

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

/* STM32 DMA and RCC helpers.*/
#include "stm32_dma.h"
#include "stm32_rcc.h"

#ifdef __cplusplus
extern "C" {
#endif
  void hal_lld_init(void);
  void stm32_clock_init(void);
#ifdef __cplusplus
}
#endif

#endif /* _HAL_LLD_H_ */

/** @} */