lora-car/libopencm3/lib/cm3/scb.c
Arti Zirk 054740c5de git subrepo clone https://github.com/libopencm3/libopencm3.git
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2023-01-21 21:54:42 +02:00

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C

/** @defgroup CM3_scb_file SCB
*
* @ingroup CM3_files
*
* @brief <b>libopencm3 Cortex-M System Control Block</b>
*
* The System Control Block (SCB) is a section of the System Control Space
* which provides status information and control features for the processor core.
* It allows, amongst other:
* * software reset control
* * exception management and grouping
* * fault information
* * power management
* * debug status information
*
* @see ARMv7m Architecture Reference Manual (Chapter B3.2.1 About the SCB)
*
* LGPL License Terms @ref lgpl_license
* @{
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <libopencm3/cm3/scb.h>
/* Those are defined only on CM3 or CM4 */
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
void scb_reset_core(void)
{
SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_VECTRESET;
while (1);
}
#endif
void scb_reset_system(void)
{
SCB_AIRCR = SCB_AIRCR_VECTKEY | SCB_AIRCR_SYSRESETREQ;
while (1);
}
/* Those are defined only on CM3 or CM4 */
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
void scb_set_priority_grouping(uint32_t prigroup)
{
SCB_AIRCR = SCB_AIRCR_VECTKEY | prigroup;
}
#endif
/**@}*/