/* 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 . */ /** * @file STM8/hal_lld.h * @brief STM8 HAL subsystem low level driver source. * @pre This module requires the following macros to be defined in the * @p board.h file: * - HSECLK (@p 0 if disabled or frequency in Hertz). * . * One of the following macros must also be defined: * - STM8S103. * - STM8S105. * - STM8S207. * - STM8S208. * - STM8S903. * . * * @addtogroup HAL * @{ */ #ifndef _HAL_LLD_H_ #define _HAL_LLD_H_ #include "stm8.h" /*===========================================================================*/ /* Driver constants. */ /*===========================================================================*/ /** * @brief Platform name. */ #define PLATFORM_NAME "STM8S" #define LSICLK 128000 /**< Low speed internal clock. */ #define HSICLK 16000000 /**< High speed internal clock. */ #define CLK_SYSSEL_HSI 0xE1 /**< HSI clock selector. */ #define CLK_SYSSEL_LSI 0xD2 /**< LSI clock selector. */ #define CLK_SYSSEL_HSE 0xB4 /**< HSE clock selector. */ #define CLK_HSI_DIV1 0 /**< HSI clock divided by 1. */ #define CLK_HSI_DIV2 1 /**< HSI clock divided by 2. */ #define CLK_HSI_DIV4 2 /**< HSI clock divided by 4. */ #define CLK_HSI_DIV8 3 /**< HSI clock divided by 8. */ #define CLK_CPU_DIV1 0 /**< CPU clock divided by 1. */ #define CLK_CPU_DIV2 1 /**< CPU clock divided by 2. */ #define CLK_CPU_DIV4 2 /**< CPU clock divided by 4. */ #define CLK_CPU_DIV8 3 /**< CPU clock divided by 8. */ #define CLK_CPU_DIV16 4 /**< CPU clock divided by 16. */ #define CLK_CPU_DIV32 5 /**< CPU clock divided by 32. */ #define CLK_CPU_DIV64 6 /**< CPU clock divided by 64. */ #define CLK_CPU_DIV128 7 /**< CPU clock divided by 128. */ /*===========================================================================*/ /* Driver pre-compile time settings. */ /*===========================================================================*/ /** * @brief Disables the clock initialization in the HAL. */ #if !defined(STM8_NO_CLOCK_INIT) || defined(__DOXYGEN__) #define STM8_NO_CLOCK_INIT FALSE #endif /** * @brief Enables or disables the HSI clock source. */ #if !defined(STM8_HSI_ENABLED) || defined(__DOXYGEN__) #define STM8_HSI_ENABLED FALSE #endif /** * @brief Enables or disables the LSI clock source. */ #if !defined(STM8_LSI_ENABLED) || defined(__DOXYGEN__) #define STM8_LSI_ENABLED TRUE #endif /** * @brief Enables or disables the HSE clock source. */ #if !defined(STM8_HSE_ENABLED) || defined(__DOXYGEN__) #define STM8_HSE_ENABLED TRUE #endif /** * @brief Clock source setting. */ #if !defined(STM8_SYSCLK_SOURCE) || defined(__DOXYGEN__) #define STM8_SYSCLK_SOURCE CLK_SYSSEL_HSE #endif /** * @brief HSI clock divider. */ #if !defined(STM8_HSI_DIVIDER) || defined(__DOXYGEN__) #define STM8_HSI_DIVIDER CLK_HSI_DIV8 #endif /** * @brief CPU clock divider. */ #if !defined(STM8_CPU_DIVIDER) || defined(__DOXYGEN__) #define STM8_CPU_DIVIDER CLK_CPU_DIV1 #endif /** * @brief bxCAN divider value. */ #if !defined(STM8_CAN_DIVIDER_VALUE) || defined(__DOXYGEN__) #define STM8_CAN_DIVIDER_VALUE 1 #endif /*===========================================================================*/ /* Derived constants and error checks. */ /*===========================================================================*/ #if (STM8_HSI_DIVIDER != CLK_HSI_DIV1) && \ (STM8_HSI_DIVIDER != CLK_HSI_DIV2) && \ (STM8_HSI_DIVIDER != CLK_HSI_DIV4) && \ (STM8_HSI_DIVIDER != CLK_HSI_DIV8) #error "specified invalid HSI divider" #endif #if (STM8_CPU_DIVIDER != CLK_CPU_DIV1) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV2) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV4) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV8) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV16) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV32) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV64) && \ (STM8_CPU_DIVIDER != CLK_CPU_DIV128) #error "specified invalid CPU divider" #endif #if (STM8_CAN_DIVIDER_VALUE < 1) || (STM8_CAN_DIVIDER_VALUE > 8) #error "specified invalid CAN divider value" #endif #if STM8_HSE_ENABLED && (HSECLK == 0) #error "impossible to activate HSE" #endif #if !STM8_HSI_ENABLED && (STM8_SYSCLK_SOURCE == CLK_SYSSEL_HSI) #error "requested HSI clock is not enabled" #endif #if !STM8_LSI_ENABLED && (STM8_SYSCLK_SOURCE == CLK_SYSSEL_LSI) #error "requested LSI clock is not enabled" #endif #if !STM8_HSE_ENABLED && (STM8_SYSCLK_SOURCE == CLK_SYSSEL_HSE) #error "requested HSE clock is not enabled" #endif /** * @brief System clock. */ #if STM8L_NO_CLOCK_INIT || defined(__DOXYGEN__) #define SYSCLK (HSICLK / 8) #elif STM8_SYSCLK_SOURCE == CLK_SYSSEL_HSI #define SYSCLK (HSICLK / (1 << STM8_HSI_DIVIDER)) #elif STM8_SYSCLK_SOURCE == CLK_SYSSEL_LSI #define SYSCLK LSICLK #elif STM8_SYSCLK_SOURCE == CLK_SYSSEL_HSE #define SYSCLK HSECLK #else #error "specified invalid clock source" #endif /** * @brief CPU clock. * @details On the STM8S the CPU clock can be programmed to be a fraction of * the system clock. */ #define CPUCLK (SYSCLK / (1 << STM8_CPU_DIVIDER)) /*===========================================================================*/ /* Driver data structures and types. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver macros. */ /*===========================================================================*/ /*===========================================================================*/ /* External declarations. */ /*===========================================================================*/ #ifdef __cplusplus extern "C" { #endif void hal_lld_init(void); #ifdef __cplusplus } #endif #endif /* _HAL_LLD_H_ */ /** @} */