FreeRTOS/Demo/PIC32MZ_MPLAB/ConfigPerformance.c

/*
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*/

/*
 * This file implements functions to access and manipulate the PIC32 hardware
 * without reliance on third party library functions that may be liable to
 * change.
 */

/* FreeRTOS includes. */
#include "FreeRTOS.h"

/* Demo includes. */
#include "ConfigPerformance.h"

#define hwUNLOCK_KEY_0					( 0xAA996655UL )
#define hwUNLOCK_KEY_1					( 0x556699AAUL )

/*-----------------------------------------------------------*/

void vHardwareConfigurePerformance( void )
{
	/* set PBCLK2 to deliver 40Mhz clock for PMP/I2C/UART/SPI. */
	SYSKEY = hwUNLOCK_KEY_0;
	SYSKEY = hwUNLOCK_KEY_1;

	/* 200MHz / 5 = 40MHz */
	PB2DIVbits.PBDIV = 0b100;

	/* Timers use clock PBCLK3, set this to 40MHz. */
	PB3DIVbits.PBDIV = 0b100;

	/* Ports use PBCLK4. */
	PB4DIVbits.PBDIV = 0b000;

	SYSKEY = 0;

	/* Disable interrupts - note taskDISABLE_INTERRUPTS() cannot be used here as
	FreeRTOS does not globally disable interrupt. */
	__builtin_disable_interrupts();
}
/*-----------------------------------------------------------*/

void vHardwareUseMultiVectoredInterrupts( void )
{
	/* Enable multi-vector interrupts. */
	_CP0_BIS_CAUSE( 0x00800000U );
	INTCONSET = _INTCON_MVEC_MASK;
	__builtin_enable_interrupts();
}