sysclk.c File Reference

Chip-specific system clock management functions.

Copyright (c) 2009-2018 Microchip Technology Inc. and its subsidiaries.

#include <avr32/io.h>
#include <compiler.h>
#include <stdbool.h>
#include <sysclk.h>
#include <flashcdw.h>
#include <osc.h>

Macros
Initial module clock masks
These are the mask values written to the xxxMASK registers during initialization if the user has overridden the default behavior of all clocks left enabled. These values assume that: Debugging should be possible The program may be running from flash The PM should be available to unmask other clocks All on-chip RAM should be available INTC, SCIF, PM and GPIO are made permanently available for now; this may change in the future.
#define	SYSCLK_INIT_MINIMAL_CPUMASK
	Initial value of CPUMASK. More...
#define	SYSCLK_INIT_MINIMAL_HSBMASK
	Initial value of HSBMASK. More...
#define	SYSCLK_INIT_MINIMAL_PBAMASK
	Initial value of PBAMASK. More...
#define	SYSCLK_INIT_MINIMAL_PBBMASK   0
	Initial value of PBBMASK. More...

Functions
void	sysclk_priv_disable_module (unsigned int bus_id, unsigned int module_index)
	Disable a maskable module clock. More...
void	sysclk_priv_enable_module (unsigned int bus_id, unsigned int module_index)
	Enable a maskable module clock. More...
Enabling and disabling synchronous clocks
void	sysclk_enable_pbb_module (unsigned int index)
	Enable a module clock derived from the PBB clock. More...
void	sysclk_disable_pbb_module (unsigned int index)
	Disable a module clock derived from the PBB clock. More...
System Clock Source and Prescaler configuration
void	sysclk_set_prescalers (unsigned int cpu_shift, unsigned int pba_shift, unsigned int pbb_shift)
	Set system clock prescaler configuration. More...
void	sysclk_set_source (uint_fast8_t src)
	Change the source of the main system clock. More...
System Clock Initialization
void	sysclk_init (void)
	Initialize the synchronous clock system. More...

Variables
static uint8_t	sysclk_pbb_refcount
	Number of enabled peripherals on the PBB bus. More...