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79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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* FreeRTOS Kernel V10.2.1
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* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://www.FreeRTOS.org
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* http://aws.amazon.com/freertos
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*
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* 1 tab == 4 spaces!
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*/
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/*
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* This file implements functions to access and manipulate the PIC32 hardware
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* without reliance on third party library functions that may be liable to
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* change.
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*/
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/* FreeRTOS includes. */
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#include "FreeRTOS.h"
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/* Demo includes. */
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#include "ConfigPerformance.h"
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#define hwUNLOCK_KEY_0 ( 0xAA996655UL )
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#define hwUNLOCK_KEY_1 ( 0x556699AAUL )
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/*-----------------------------------------------------------*/
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void vHardwareConfigurePerformance( void )
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{
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/* set PBCLK2 to deliver 40Mhz clock for PMP/I2C/UART/SPI. */
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SYSKEY = hwUNLOCK_KEY_0;
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SYSKEY = hwUNLOCK_KEY_1;
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/* 200MHz / 5 = 40MHz */
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PB2DIVbits.PBDIV = 0b100;
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/* Timers use clock PBCLK3, set this to 40MHz. */
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PB3DIVbits.PBDIV = 0b100;
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/* Ports use PBCLK4. */
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PB4DIVbits.PBDIV = 0b000;
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SYSKEY = 0;
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/* Disable interrupts - note taskDISABLE_INTERRUPTS() cannot be used here as
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FreeRTOS does not globally disable interrupt. */
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__builtin_disable_interrupts();
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}
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/*-----------------------------------------------------------*/
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void vHardwareUseMultiVectoredInterrupts( void )
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{
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/* Enable multi-vector interrupts. */
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_CP0_BIS_CAUSE( 0x00800000U );
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INTCONSET = _INTCON_MVEC_MASK;
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__builtin_enable_interrupts();
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}
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