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722 lines
22 KiB
C
722 lines
22 KiB
C
/**
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* \file
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*
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* \brief SAM System related functionality
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*
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* Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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/*
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* Support and FAQ: visit <a href="https://www.microchip.com/support/">Microchip Support</a>
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*/
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#ifndef SYSTEM_H_INCLUDED
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#define SYSTEM_H_INCLUDED
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#include <compiler.h>
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#include <clock.h>
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#include <gclk.h>
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#include <pinmux.h>
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#include <power.h>
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#include <reset.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup asfdoc_sam0_system_group SAM System (SYSTEM) Driver
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*
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* This driver for Atmel® | SMART ARM®-based microcontrollers provides an interface for the configuration
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* and management of the device's system relation functionality, necessary for
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* the basic device operation. This is not limited to a single peripheral, but
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* extends across multiple hardware peripherals.
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*
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* The following peripherals are used by this module:
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* \if DEVICE_SAML21_SYSTEM_SUPPORT
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* - PM (Power Manager)
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* - RSTC (Reset Controller)
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* - SUPC (Supply Controller)
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* \endif
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* \if DEVICE_SAMC21_SYSTEM_SUPPORT
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* - PM (Power Manager)
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* - RSTC (Reset Controller)
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* - SUPC (Supply Controller)
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* \endif
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* \if DEVICE_SAMD21_SYSTEM_SUPPORT
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* - SYSCTRL (System Control)
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* - PM (Power Manager)
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* \endif
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*
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* The following devices can use this module:
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* \if DEVICE_SAML21_SYSTEM_SUPPORT
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* - Atmel | SMART SAM L21
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* - Atmel | SMART SAM R30
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* - Atmel | SMART SAM R34
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* - Atmel | SMART SAM R35
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* \endif
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* \if DEVICE_SAMC21_SYSTEM_SUPPORT
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* - Atmel | SMART SAM C20/C21
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* \endif
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* \if DEVICE_SAMD21_SYSTEM_SUPPORT
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* - Atmel | SMART SAM D20/D21
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* - Atmel | SMART SAM R21
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* - Atmel | SMART SAM D09/D10/D11
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* - Atmel | SMART SAM DA1
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* \endif
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*
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* The outline of this documentation is as follows:
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* - \ref asfdoc_sam0_system_prerequisites
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* - \ref asfdoc_sam0_system_module_overview
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* - \ref asfdoc_sam0_system_special_considerations
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* - \ref asfdoc_sam0_system_extra_info
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* - \ref asfdoc_sam0_system_examples
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* - \ref asfdoc_sam0_system_api_overview
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*
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*
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* \section asfdoc_sam0_system_prerequisites Prerequisites
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*
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* There are no prerequisites for this module.
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*
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*
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* \section asfdoc_sam0_system_module_overview Module Overview
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*
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* The System driver provides a collection of interfaces between the user
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* application logic, and the core device functionality (such as clocks, reset
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* cause determination, etc.) that is required for all applications. It contains
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* a number of sub-modules that control one specific aspect of the device:
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*
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* - System Core (this module)
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* - \ref asfdoc_sam0_system_clock_group "System Clock Control" (sub-module)
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* - \ref asfdoc_sam0_system_interrupt_group "System Interrupt Control" (sub-module)
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* - \ref asfdoc_sam0_system_pinmux_group "System Pin Multiplexer Control" (sub-module)
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*
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*
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* \if DEVICE_SAML21_SYSTEM_SUPPORT
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* \subsection asfdoc_sam0_system_module_overview_vreg_l21 Voltage Regulator
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* The SAM device controls the voltage regulators for the core (VDDCORE) and
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* backup (VDDBU) domains. It sets the voltage regulators according to the sleep
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* modes, the performance level, or the user configuration.
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*
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* In active mode, the voltage regulator can be chosen on the fly between a LDO
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* or a Buck converter. In standby mode, the low power voltage regulator is used
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* to supply VDDCORE.
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*
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* \subsection asfdoc_sam0_system_module_overview_bbps Battery Backup Power Switch
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* The SAM device supports connection of a battery backup to the VBAT power pin.
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* It includes functionality that enables automatic power switching between main
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* power and battery backup power. This will ensure power to the backup domain,
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* when the main battery or power source is unavailable.
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* \endif
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*
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* \if DEVICE_SAMC21_SYSTEM_SUPPORT
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* \subsection asfdoc_sam0_system_module_overview_vreg_c21 Voltage Regulator
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* The SAM device controls the voltage regulators for the core (VDDCORE). It sets
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* the voltage regulators according to the sleep modes.
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*
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* There are a selectable reference voltage and voltage dependent on the temperature
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* which can be used by analog modules like the ADC.
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* \endif
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*
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* \subsection asfdoc_sam0_system_module_overview_vref Voltage References
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* The various analog modules within the SAM devices (such as AC, ADC, and
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* DAC) require a voltage reference to be configured to act as a reference point
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* for comparisons and conversions.
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*
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* The SAM devices contain multiple references, including an internal
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* temperature sensor and a fixed band-gap voltage source. When enabled, the
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* associated voltage reference can be selected within the desired peripheral
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* where applicable.
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*
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* \subsection asfdoc_sam0_system_module_overview_reset_cause System Reset Cause
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* In some applications there may be a need to execute a different program
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* flow based on how the device was reset. For example, if the cause of reset
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* was the Watchdog timer (WDT), this might indicate an error in the application,
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* and a form of error handling or error logging might be needed.
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*
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* For this reason, an API is provided to retrieve the cause of the last system
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* reset, so that appropriate action can be taken.
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*
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* \if DEVICE_SAML21_SYSTEM_SUPPORT
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* There are three groups of reset sources:
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* - Power supply reset: Resets caused by an electrical issue. It covers POR and BOD reset.
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* - User reset: Resets caused by the application. It covers external reset,
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* system reset, and watchdog reset.
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* - Backup reset: Resets caused by a backup mode exit condition.
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*
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* \subsection asfdoc_sam0_system_module_overview_performance_level Performance Level
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* Performance level allows the user to adjust the regulator output voltage to reduce
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* power consumption. The user can on the fly select the most suitable performance
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* level, depending on the application demands.
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*
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* The SAM device can operate at two different performance levels (PL0 and PL2).
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* When operating at PL0, the voltage applied on the full logic area is reduced
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* by voltage scaling. This voltage scaling technique allows to reduce the active
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* power consumption while decreasing the maximum frequency of the device. When
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* operating at PL2, the voltage regulator supplies the highest voltage, allowing
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* the device to run at higher clock speeds.
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*
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* Performance level transition is possible only when the device is in active
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* mode. After a reset, the device starts at the lowest performance level
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* (lowest power consumption and lowest max. frequency). The application can then
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* switch to another performance level at any time without any stop in the code
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* execution. As shown in \ref asfdoc_sam0_system_performance_level_transition_figure.
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*
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* \note When scaling down the performance level, the bus frequency should first be
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* scaled down in order to not exceed the maximum frequency allowed for the
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* low performance level.
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* When scaling up the performance level (e.g. from PL0 to PL2), check the performance
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* level status before increasing the bus frequency. It can be increased only
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* when the performance level transition is completed.
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*
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* \anchor asfdoc_sam0_system_performance_level_transition_figure
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* \image html performance_level_transition.svg "Performance Level Transition"
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*
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* \subsection asfdoc_sam0_system_module_overview_power_domain Power Domain Gating
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* Power domain gating allows power saving by reducing the voltage in logic
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* areas in the device to a low-power supply. The feature is available in
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* Standby sleep mode and will reduce the voltage in domains where all peripherals
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* are idle. Internal logic will maintain its content, meaning the corresponding
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* peripherals will not need to be reconfigured when normal operating voltage
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* is returned. Most power domains can be in the following three states:
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*
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* - Active state: The power domain is powered on.
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* - Retention state: The main voltage supply for the power domain is switched off,
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* while maintaining a secondary low-power supply for the sequential cells. The
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* logic context is restored when waking up.
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* - Off state: The power domain is entirely powered off. The logic context is lost.
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*
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* The SAM L21 device contains three power domains which can be controlled using
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* power domain gating, namely PD0, PD1, and PD2. These power domains can be
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* configured to the following cases:
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* - Default with no sleepwalking peripherals: A power domain is automatically set
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* to retention state in standby sleep mode if no activity require it. The application
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* can force all power domains to remain in active state during standby sleep mode
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* in order to accelerate wakeup time.
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* - Default with sleepwalking peripherals: If one or more peripherals are enabled
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* to perform sleepwalking tasks in standby sleep mode, the corresponding power
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* domain (PDn) remains in active state as well as all inferior power domains (<PDn).
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* - Sleepwalking with dynamic power domain gating: During standby sleep mode, a
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* power domain (PDn) in active can wake up a superior power domain (>PDn) in order
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* to perform a sleepwalking task. The superior power domain is then automatically
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* set to active state. At the end of the sleepwalking task, the device can either
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* be woken up or the superior power domain can return to retention state.
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*
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* Power domains can be linked to each other, it allows a power domain (PDn) to be kept
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* in active state if the inferior power domain (PDn-1) is in active state too.
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*
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* \ref asfdoc_sam0_system_power_domain_overview_table illustrates the
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* four cases to consider in standby mode.
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*
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* \anchor asfdoc_sam0_system_power_domain_overview_table
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* <table>
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* <caption>Sleep Mode versus Power Domain State Overview</caption>
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* <tr>
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* <th>Sleep mode</th>
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* <th>PD0</th>
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* <th>PD1</th>
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* <th>PD2</th>
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* <th>PDTOP</th>
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* <th>PDBACKUP</th>
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* </tr>
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* <tr>
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* <td>Idle</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Standby - Case 1</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Standby - Case 2</td>
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* <td>active</td>
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* <td>active</td>
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* <td>retention</td>
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* <td>active</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Standby - Case 3</td>
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* <td>active</td>
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* <td>retention</td>
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* <td>retention</td>
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* <td>active</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Standby - Case 4</td>
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* <td>retention</td>
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* <td>retention</td>
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* <td>retention</td>
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* <td>active</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Backup</td>
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* <td>off</td>
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* <td>off</td>
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* <td>off</td>
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* <td>off</td>
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* <td>active</td>
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* </tr>
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* <tr>
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* <td>Off</td>
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* <td>off</td>
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* <td>off</td>
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* <td>off</td>
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* <td>off</td>
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* <td>off</td>
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* </tr>
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* </table>
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*
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* \subsection asfdoc_sam0_system_module_overview_ram_state RAMs Low Power Mode
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* By default, in standby sleep mode, RAM is in low power mode (back biased)
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* if its power domain is in retention state.
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* \ref asfdoc_sam0_system_power_ram_state_table lists RAMs low power mode.
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*
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* \anchor asfdoc_sam0_system_power_ram_state_table
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* <table>
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* <caption>RAM Back-biasing Mode</caption>
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* <tr>
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* <th>RAM mode</th>
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* <th>Description</th>
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* </tr>
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* <tr>
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* <td>Retention Back-biasing mode</td>
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* <td>RAM is back-biased if its power domain is in retention mode</td>
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* </tr>
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* <tr>
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* <td>Standby Back-biasing mode</td>
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* <td>RAM is back-biased if the device is in standby mode</td>
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* </tr>
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* <tr>
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* <td>Standby OFF mode</td>
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* <td>RAM is OFF if the device is in standby mode</td>
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* </tr>
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* <tr>
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* <td>Always OFF mode</td>
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* <td>RAM is OFF if the device is in RET mode</td>
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* </tr>
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* </table>
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*
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* \endif
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*
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* \subsection asfdoc_sam0_system_module_overview_sleep_mode Sleep Modes
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* The SAM devices have several sleep modes. The sleep mode controls
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* which clock systems on the device will remain enabled or disabled when the
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* device enters a low power sleep mode.
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* \ref asfdoc_sam0_system_module_sleep_mode_table "The table below" lists the
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* clock settings of the different sleep modes.
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*
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* \anchor asfdoc_sam0_system_module_sleep_mode_table
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* <table>
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* <caption>SAM Device Sleep Modes</caption>
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* \if DEVICE_SAML21_SYSTEM_SUPPORT
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* <tr>
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* <th>Sleep mode</th>
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* <th>System clock</th>
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* <th>CPU clock</th>
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* <th>AHB/AHB clock</th>
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* <th>GCLK clocks</th>
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* <th>Oscillators (ONDEMAND = 0)</th>
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* <th>Oscillators (ONDEMAND = 1)</th>
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* <th>Regulator mode</th>
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* <th>RAM mode</th>
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* </tr>
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* <tr>
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* <td>Idle</td>
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* <td>Run</td>
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* <td>Stop</td>
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* <td>Run if requested</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run if requested</td>
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* <td>Normal</td>
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* <td>Normal</td>
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* </tr>
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* <tr>
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* <td>Standby</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Run if requested</td>
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* <td>Run if requested</td>
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* <td>Run if requested or RUNSTDBY = 1</td>
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* <td>Run if requested</td>
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* <td>Low pwer</td>
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* <td>Low pwer</td>
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* </tr>
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* <tr>
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* <td>Backup</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Backup</td>
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* <td>Off</td>
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* </tr>
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* <tr>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* <td>Off</td>
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* </tr>
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* \else
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* <tr>
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* <th>Sleep mode</th>
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* <th>CPU clock</th>
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* <th>AHB clock</th>
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* <th>APB clocks</th>
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* <th>Clock sources</th>
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* <th>System clock</th>
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* <th>32KHz</th>
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* <th>Reg mode</th>
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* <th>RAM mode</th>
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* </tr>
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* <tr>
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* <td>Idle 0</td>
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* <td>Stop</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Normal</td>
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* <td>Normal</td>
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* </tr>
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* <tr>
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* <td>Idle 1</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Normal</td>
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* <td>Normal</td>
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* </tr>
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* <tr>
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* <td>Idle 2</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Run</td>
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* <td>Normal</td>
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* <td>Normal</td>
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* </tr>
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* <tr>
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* <td>Standby</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Stop</td>
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* <td>Low Power</td>
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* <td>Source/Drain biasing</td>
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* </tr>
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* \endif
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* </table>
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|
*
|
|
* Before entering device sleep, one of the available sleep modes must be set.
|
|
* The device will automatically wake up in response to an interrupt being
|
|
* generated or upon any other sleep mode exit condition.
|
|
*
|
|
* Some peripheral clocks will remain enabled during sleep, depending on their
|
|
* configuration. If desired, the modules can remain clocked during sleep to allow
|
|
* them continue to operate while other parts of the system are powered down
|
|
* to save power.
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_special_considerations Special Considerations
|
|
*
|
|
* Most of the functions in this driver have device specific restrictions and
|
|
* caveats; refer to your device datasheet.
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_extra_info Extra Information
|
|
*
|
|
* For extra information, see \ref asfdoc_sam0_system_extra. This includes:
|
|
* - \ref asfdoc_sam0_system_extra_acronyms
|
|
* - \ref asfdoc_sam0_system_extra_dependencies
|
|
* - \ref asfdoc_sam0_system_extra_errata
|
|
* - \ref asfdoc_sam0_system_extra_history
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_examples Examples
|
|
*
|
|
* For SYSTEM module related examples, refer to the sub-modules listed in
|
|
* the \ref asfdoc_sam0_system_module_overview "Module Overview".
|
|
*
|
|
* \if DEVICE_SAML21_SYSTEM_SUPPORT
|
|
* For a list of examples related to this driver, see
|
|
* \ref asfdoc_sam0_drivers_power_exqsg.
|
|
* \endif
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_api_overview API Overview
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \name System Debugger
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Check if debugger is present.
|
|
*
|
|
* Check if debugger is connected to the onboard debug system (DAP).
|
|
*
|
|
* \return A bool identifying if a debugger is present.
|
|
*
|
|
* \retval true Debugger is connected to the system
|
|
* \retval false Debugger is not connected to the system
|
|
*
|
|
*/
|
|
static inline bool system_is_debugger_present(void)
|
|
{
|
|
return DSU->STATUSB.reg & DSU_STATUSB_DBGPRES;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* \name System Identification
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Retrieve the device identification signature.
|
|
*
|
|
* Retrieves the signature of the current device.
|
|
*
|
|
* \return Device ID signature as a 32-bit integer.
|
|
*/
|
|
static inline uint32_t system_get_device_id(void)
|
|
{
|
|
return DSU->DID.reg;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* \name System Initialization
|
|
* @{
|
|
*/
|
|
|
|
void system_init(void);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
*
|
|
* \if DEVICE_SAML21_SYSTEM_SUPPORT
|
|
* \page asfdoc_sam0_drivers_power_exqsg Examples for SYSTEM Driver
|
|
*
|
|
* This is a list of the available Quick Start Guides (QSGs) and example
|
|
* applications for \ref asfdoc_sam0_system_group. QSGs are simple examples with step-by-step instructions to
|
|
* configure and use this driver in a selection of
|
|
* use cases. Note that a QSG can be compiled as a standalone application or be
|
|
* added to the user application.
|
|
*
|
|
* - \subpage asfdoc_sam0_power_basic_use_case
|
|
* \endif
|
|
*
|
|
* \page asfdoc_sam0_system_extra Extra Information for SYSTEM Driver
|
|
*
|
|
* \section asfdoc_sam0_system_extra_acronyms Acronyms
|
|
* Below is a table listing the acronyms used in this module, along with their
|
|
* intended meanings.
|
|
*
|
|
* <table>
|
|
* <tr>
|
|
* <th>Acronym</th>
|
|
* <th>Definition</th>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>PM</td>
|
|
* <td>Power Manager</td>
|
|
* </tr>
|
|
* \if DEVICE_SAML21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>SUPC</td>
|
|
* <td>Supply Controller</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>RSTC</td>
|
|
* <td>Reset Controller</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMC21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>SUPC</td>
|
|
* <td>Supply Controller</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>RSTC</td>
|
|
* <td>Reset Controller</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMD21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>SYSCTRL</td>
|
|
* <td>System control interface</td>
|
|
* </tr>
|
|
* \endif
|
|
* </table>
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_extra_dependencies Dependencies
|
|
* This driver has the following dependencies:
|
|
*
|
|
* - None
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_extra_errata Errata
|
|
* There are no errata related to this driver.
|
|
*
|
|
*
|
|
* \section asfdoc_sam0_system_extra_history Module History
|
|
* An overview of the module history is presented in the table below, with
|
|
* details on the enhancements and fixes made to the module since its first
|
|
* release. The current version of this corresponds to the newest version in
|
|
* the table.
|
|
*
|
|
* <table>
|
|
* <tr>
|
|
* <th>Changelog</th>
|
|
* </tr>
|
|
* \if DEVICE_SAML21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>Initial Release</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMC21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>Initial Release</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMD21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>Added new \c system_reset() to reset the complete MCU with some exceptions</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>Added new \c system_get_device_id() function to retrieved the device
|
|
* ID</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>Initial Release</td>
|
|
* </tr>
|
|
* \endif
|
|
* </table>
|
|
*
|
|
* \page asfdoc_sam0_system_document_revision_history Document Revision History
|
|
*
|
|
* <table>
|
|
* <tr>
|
|
* <th>Doc. Rev.</th>
|
|
* <th>Date</th>
|
|
* <th>Comments</th>
|
|
* </tr>
|
|
* \if DEVICE_SAML21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>42449A</td>
|
|
* <td>07/2015</td>
|
|
* <td>Initial document release</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMC21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>42484A</td>
|
|
* <td>12/2015</td>
|
|
* <td>Initial document release.</td>
|
|
* </tr>
|
|
* \endif
|
|
* \if DEVICE_SAMD21_SYSTEM_SUPPORT
|
|
* <tr>
|
|
* <td>42120E</td>
|
|
* <td>12/2015</td>
|
|
* <td>Added support for SAM DA1 and SAM D09</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>42120D</td>
|
|
* <td>12/2014</td>
|
|
* <td>Added support for SAM R21 and SAM D10/D11</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>42120C</td>
|
|
* <td>01/2014</td>
|
|
* <td>Added support for SAM D21</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>42120B</td>
|
|
* <td>06/2013</td>
|
|
* <td>Corrected documentation typos</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>42120A</td>
|
|
* <td>06/2013</td>
|
|
* <td>Initial document release</td>
|
|
* </tr>
|
|
* \endif
|
|
* </table>
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* SYSTEM_H_INCLUDED */
|
|
|