69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/** @defgroup CM3_scb_file SCB
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*
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* @ingroup CM3_files
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*
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* @brief <b>libopencm3 Cortex-M System Control Block</b>
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*
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* The System Control Block (SCB) is a section of the System Control Space
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* which provides status information and control features for the processor core.
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* It allows, amongst other:
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* * software reset control
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* * exception management and grouping
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* * fault information
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* * power management
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* * debug status information
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*
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* @see ARMv7m Architecture Reference Manual (Chapter B3.2.1 About the SCB)
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*
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* LGPL License Terms @ref lgpl_license
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* @{
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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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*
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* This library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <libopencm3/cm3/scb.h>
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/* Those are defined only on CM3 or CM4 */
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#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
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void scb_reset_core(void)
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{
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SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_VECTRESET;
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while (1);
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}
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#endif
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void scb_reset_system(void)
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{
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SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_SYSRESETREQ;
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while (1);
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}
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/* Those are defined only on CM3 or CM4 */
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#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
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void scb_set_priority_grouping(uint32_t prigroup)
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{
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SCB_AIRCR = SCB_AIRCR_VECTKEY | prigroup;
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}
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#endif
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/**@}*/ |