104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 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 MSP430/hal_lld.h
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* @brief MSP430 HAL subsystem low level driver header.
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* @addtogroup MSP430_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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#include "msp430x16x.h"
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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#define MSP430_CLOCK_SOURCE_XT2CLK 0 /** @brief XT2CLK clock selector. */
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#define MSP430_CLOCK_SOURCE_DCOCLK 1 /** @brief DCOCLK clock selector. */
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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 Clock source.
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* @details The clock source can be selected from:
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* - @p MSP430_CLOCK_SOURCE_XT2CLK.
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* - @p MSP430_CLOCK_SOURCE_DCOCLK.
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* .
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*/
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#if !defined(MSP430_USE_CLOCK) || defined(__DOXYGEN__)
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#define MSP430_USE_CLOCK MSP430_CLOCK_SOURCE_XT2CLK
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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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/*
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* Calculating the derived clock constants.
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*/
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#define ACLK LFXT1CLK
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#if MSP430_USE_CLOCK == MSP430_CLOCK_SOURCE_XT2CLK
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#define MCLK XT2CLK
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#define SMCLK (XT2CLK / 8)
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#elif MSP430_USE_CLOCK == MSP430_CLOCK_SOURCE_DCOCLK
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#define MCLK DCOCLK
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#define SMCLK DCOCLK
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#else
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#error "unknown clock source specified"
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#endif
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/*
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* Calculating the initialization values.
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*/
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#define VAL_DCOCTL (DCO0 | DCO1)
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#if MSP430_USE_CLOCK == MSP430_CLOCK_SOURCE_XT2CLK
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#define VAL_BCSCTL1 (RSEL2)
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#define VAL_BCSCTL2 (SELM_2 | DIVM_0 | DIVS_3 | SELS)
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#endif
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#if MSP430_USE_CLOCK == MSP430_CLOCK_SOURCE_DCOCLK
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#define VAL_BCSCTL1 (XT2OFF | RSEL2)
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#define VAL_BCSCTL2 (SELM_0 | DIVM_0 | DIVS_0)
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#endif
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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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/* 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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