227 lines
8.0 KiB
C
227 lines
8.0 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM8S/hal_lld.h
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* @brief STM8S HAL subsystem low level driver source.
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* @pre This module requires the following macros to be defined in the
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* @p board.h file:
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* - HSECLK (@p 0 if disabled or frequency in Hertz).
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* .
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* One of the following macros must also be defined:
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* - STM8S103.
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* - STM8S105.
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* - STM8S207.
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* - STM8S208.
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* - STM8S903.
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* .
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*
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* @addtogroup HAL
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* @{
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*/
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#ifndef _HAL_LLD_H_
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#define _HAL_LLD_H_
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#undef FALSE
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#undef TRUE
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#if defined(STM8S208) || defined(STM8S207) || defined(STM8S105) || \
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defined(STM8S103) || defined(STM8S903)
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#include "stm8s.h"
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#else
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#error "unsupported or invalid STM8 platform"
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#endif
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#define FALSE 0
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#define TRUE (!FALSE)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @brief Defines the support for realtime counters in the HAL.
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*/
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#define HAL_IMPLEMENTS_COUNTERS FALSE
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/**
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* @brief Platform name.
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*/
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#define PLATFORM_NAME "STM8S"
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#define LSICLK 128000 /**< Low speed internal clock. */
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#define HSICLK 16000000 /**< High speed internal clock. */
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#define CLK_SYSSEL_HSI 0xE1 /**< HSI clock selector. */
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#define CLK_SYSSEL_LSI 0xD2 /**< LSI clock selector. */
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#define CLK_SYSSEL_HSE 0xB4 /**< HSE clock selector. */
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#define CLK_HSI_DIV1 0 /**< HSI clock divided by 1. */
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#define CLK_HSI_DIV2 1 /**< HSI clock divided by 2. */
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#define CLK_HSI_DIV4 2 /**< HSI clock divided by 4. */
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#define CLK_HSI_DIV8 3 /**< HSI clock divided by 8. */
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#define CLK_CPU_DIV1 0 /**< CPU clock divided by 1. */
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#define CLK_CPU_DIV2 1 /**< CPU clock divided by 2. */
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#define CLK_CPU_DIV4 2 /**< CPU clock divided by 4. */
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#define CLK_CPU_DIV8 3 /**< CPU clock divided by 8. */
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#define CLK_CPU_DIV16 4 /**< CPU clock divided by 16. */
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#define CLK_CPU_DIV32 5 /**< CPU clock divided by 32. */
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#define CLK_CPU_DIV64 6 /**< CPU clock divided by 64. */
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#define CLK_CPU_DIV128 7 /**< CPU clock divided by 128. */
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief Disables the clock initialization in the HAL.
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*/
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#if !defined(STM8S_NO_CLOCK_INIT) || defined(__DOXYGEN__)
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#define STM8S_NO_CLOCK_INIT FALSE
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#endif
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/**
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* @brief Enables or disables the HSI clock source.
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*/
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#if !defined(STM8S_HSI_ENABLED) || defined(__DOXYGEN__)
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#define STM8S_HSI_ENABLED FALSE
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#endif
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/**
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* @brief Enables or disables the LSI clock source.
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*/
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#if !defined(STM8S_LSI_ENABLED) || defined(__DOXYGEN__)
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#define STM8S_LSI_ENABLED TRUE
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#endif
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/**
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* @brief Enables or disables the HSE clock source.
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*/
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#if !defined(STM8S_HSE_ENABLED) || defined(__DOXYGEN__)
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#define STM8S_HSE_ENABLED TRUE
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#endif
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/**
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* @brief Clock source setting.
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*/
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#if !defined(STM8S_SYSCLK_SOURCE) || defined(__DOXYGEN__)
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#define STM8S_SYSCLK_SOURCE CLK_SYSSEL_HSE
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#endif
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/**
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* @brief HSI clock divider.
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*/
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#if !defined(STM8S_HSI_DIVIDER) || defined(__DOXYGEN__)
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#define STM8S_HSI_DIVIDER CLK_HSI_DIV8
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#endif
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/**
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* @brief CPU clock divider.
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*/
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#if !defined(STM8S_CPU_DIVIDER) || defined(__DOXYGEN__)
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#define STM8S_CPU_DIVIDER CLK_CPU_DIV1
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if (STM8S_HSI_DIVIDER != CLK_HSI_DIV1) && \
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(STM8S_HSI_DIVIDER != CLK_HSI_DIV2) && \
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(STM8S_HSI_DIVIDER != CLK_HSI_DIV4) && \
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(STM8S_HSI_DIVIDER != CLK_HSI_DIV8)
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#error "specified invalid HSI divider"
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#endif
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#if (STM8S_CPU_DIVIDER != CLK_CPU_DIV1) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV2) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV4) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV8) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV16) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV32) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV64) && \
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(STM8S_CPU_DIVIDER != CLK_CPU_DIV128)
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#error "specified invalid CPU divider"
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#endif
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#if STM8S_HSE_ENABLED && (HSECLK == 0)
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#error "impossible to activate HSE"
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#endif
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#if !STM8S_HSI_ENABLED && (STM8S_SYSCLK_SOURCE == CLK_SYSSEL_HSI)
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#error "requested HSI clock is not enabled"
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#endif
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#if !STM8S_LSI_ENABLED && (STM8S_SYSCLK_SOURCE == CLK_SYSSEL_LSI)
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#error "requested LSI clock is not enabled"
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#endif
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#if !STM8S_HSE_ENABLED && (STM8S_SYSCLK_SOURCE == CLK_SYSSEL_HSE)
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#error "requested HSE clock is not enabled"
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#endif
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/**
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* @brief System clock.
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*/
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#if STM8SL_NO_CLOCK_INIT || defined(__DOXYGEN__)
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#define SYSCLK (HSICLK / 8)
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#elif STM8S_SYSCLK_SOURCE == CLK_SYSSEL_HSI
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#define SYSCLK (HSICLK / (1 << STM8S_HSI_DIVIDER))
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#elif STM8S_SYSCLK_SOURCE == CLK_SYSSEL_LSI
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#define SYSCLK LSICLK
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#elif STM8S_SYSCLK_SOURCE == CLK_SYSSEL_HSE
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#define SYSCLK HSECLK
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#else
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#error "specified invalid clock source"
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#endif
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/**
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* @brief CPU clock.
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* @details On the STM8SS the CPU clock can be programmed to be a fraction of
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* the system clock.
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*/
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#define CPUCLK (SYSCLK / (1 << STM8S_CPU_DIVIDER))
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void hal_lld_init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _HAL_LLD_H_ */
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/** @} */
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