Chip-specific system clock management functions.

#include <board.h>
#include <avr32/io.h>
#include <dfll.h>
#include <osc.h>
#include <pll.h>
#include <genclk.h>

Macros
#define	AVR32_ACIFB_CLK_PBA 86

#define	AVR32_ADCIFB_CLK_PBA 85

#define	AVR32_AW_ADDRESS 0xFFFF7000

#define	AVR32_AW_CLK_PBA 89

#define	AVR32_CAT_CLK_PBA 87

#define	AVR32_CORE_CLK_CPU_COUNT 16

#define	AVR32_GLOC_CLK_PBA 88

#define	AVR32_TC1_CLK_PBA 84

#define	CONFIG_SYSCLK_CPU_DIV 0
	Configuration symbol for dividing the CPU clock frequency by \(2^{CONFIG\_SYSCLK\_CPU\_DIV}\). More...

#define	CONFIG_SYSCLK_INIT_CPUMASK
	Configuration symbol for the CPU clocks enabled at power-on after the sysclock module has been initialized. More...

#define	CONFIG_SYSCLK_INIT_HSBMASK
	Configuration symbol for the HSB clocks enabled at power-on after the sysclock module has been initialized. More...

#define	CONFIG_SYSCLK_INIT_PBAMASK
	Configuration symbol for the PBA clocks enabled at power-on after the sysclock module has been initialized. More...

#define	CONFIG_SYSCLK_INIT_PBBMASK
	Configuration symbol for the PBB clocks enabled at power-on after the sysclock module has been initialized. More...

#define	CONFIG_SYSCLK_PBA_DIV 0
	Configuration symbol for dividing the PBA clock frequency by \(2^{CONFIG\_SYSCLK\_PBA\_DIV}\). More...

#define	CONFIG_SYSCLK_PBB_DIV 0
	Configuration symbol for dividing the PBB clock frequency by \(2^{CONFIG\_SYSCLK\_PBB\_DIV}\). More...

#define	CONFIG_SYSCLK_SOURCE SYSCLK_SRC_RCSYS

#define	CONFIG_USBCLK_DIV
	Configuration symbol for the USB generic clock divider setting. More...

#define	CONFIG_USBCLK_SOURCE
	Configuration symbol for the USB generic clock source. More...

System clock source
#define	SYSCLK_SRC_RCSYS AVR32_PM_MCSEL_SLOW
	System RC oscillator. More...

#define	SYSCLK_SRC_OSC0 AVR32_PM_MCSEL_OSC0
	Oscillator 0. More...

#define	SYSCLK_SRC_DFLL AVR32_PM_MCSEL_DFLL0
	Digital Frequency Locked Loop. More...

#define	SYSCLK_SRC_RC120M AVR32_PM_MCSEL_RC120M
	120 MHz RC oscillator More...

Clocks derived from the CPU clock
#define	SYSCLK_OCD AVR32_OCD_CLK_CPU
	On-Chip Debug system. More...

#define	SYSCLK_SYSTIMER AVR32_CORE_CLK_CPU_COUNT
	COUNT/COMPARE registers. More...

Clocks derived from the HSB clock
#define	SYSCLK_PDCA_HSB (AVR32_PDCA_CLK_HSB % 32)
	PDCA memory interface. More...

#define	SYSCLK_FLASHCDW_DATA (AVR32_FLASHCDW_CLK_HSB % 32)
	Flash data interface. More...

#define	SYSCLK_SAU_HSB (AVR32_SAU_CLK_HSB % 32)
	Secure Access Unit HSB interface. More...

#define	SYSCLK_PBA_BRIDGE (AVR32_HMATRIX_CLK_HSB_PBA_BRIDGE % 32)
	HSB<->PBA bridge. More...

#define	SYSCLK_PBB_BRIDGE (AVR32_HMATRIX_CLK_HSB_PBB_BRIDGE % 32)
	HSB<->PBB bridge. More...

#define	SYSCLK_EVENT (AVR32_PES_CLK_HSB % 32)
	Peripheral Event System. More...

Clocks derived from the PBA clock
#define	SYSCLK_PDCA_PB (AVR32_PDCA_CLK_PBA % 32)
	PDCA peripheral bus interface. More...

#define	SYSCLK_INTC (AVR32_INTC_CLK_PBA % 32)
	Internal interrupt controller. More...

#define	SYSCLK_PM (AVR32_PM_CLK_PBA % 32)
	PM/RTC/EIM configuration. More...

#define	SYSCLK_SCIF (AVR32_SCIF_CLK_PBA % 32)
	System Control Interface. More...

#define	SYSCLK_AST (AVR32_AST_CLK_PBA % 32)
	Asynchronous Timer. More...

#define	SYSCLK_WDT (AVR32_WDT_CLK_PBA % 32)
	Watchdog Timer. More...

#define	SYSCLK_EIC (AVR32_EIC_CLK_PBA % 32)
	External Interrupt Controller. More...

#define	SYSCLK_FREQM (AVR32_FREQM_CLK_PBA % 32)
	Frequency Meter. More...

#define	SYSCLK_GPIO (AVR32_GPIO_CLK_PBA % 32)
	General-Purpose I/O. More...

#define	SYSCLK_USART0 (AVR32_USART0_CLK_PBA % 32)
	USART 0. More...

#define	SYSCLK_USART1 (AVR32_USART1_CLK_PBA % 32)
	USART 1. More...

#define	SYSCLK_USART2 (AVR32_USART2_CLK_PBA % 32)
	USART 2. More...

#define	SYSCLK_USART3 (AVR32_USART3_CLK_PBA % 32)
	USART 3. More...

#define	SYSCLK_SPI (AVR32_SPI_CLK_PBA % 32)
	SPI Controller. More...

#define	SYSCLK_TWIM0 (AVR32_TWIM0_CLK_PBA % 32)
	TWI Master 0. More...

#define	SYSCLK_TWIM1 (AVR32_TWIM1_CLK_PBA % 32)
	TWI Master 1. More...

#define	SYSCLK_TWIS0 (AVR32_TWIS0_CLK_PBA % 32)
	TWI Slave 0. More...

#define	SYSCLK_TWIS1 (AVR32_TWIS1_CLK_PBA % 32)
	TWI Slave 1. More...

#define	SYSCLK_PWMA (AVR32_PWMA_CLK_PBA % 32)
	Pulse Width Modulator. More...

#define	SYSCLK_TC0 (AVR32_TC0_CLK_PBA % 32)
	Timer/Counter 0. More...

#define	SYSCLK_TC1 (AVR32_TC1_CLK_PBA % 32)
	Timer/Counter 1. More...

#define	SYSCLK_ADCIFB (AVR32_ADCIFB_CLK_PBA % 32)
	A/D Converter. More...

#define	SYSCLK_ACIFB (AVR32_ACIFB_CLK_PBA % 32)
	Analog Comparator. More...

#define	SYSCLK_CAT (AVR32_CAT_CLK_PBA % 32)
	Capacitive Touch. More...

#define	SYSCLK_GLOC (AVR32_GLOC_CLK_PBA % 32)
	Glue Logic Controller. More...

#define	SYSCLK_AW (AVR32_AW_CLK_PBA % 32)
	aWire UART More...

Clocks derived from the PBB clock
#define	SYSCLK_FLASHCDW_REGS (AVR32_FLASHC_CLK_PBB % 32)
	Flash Controller registers. More...

#define	SYSCLK_HMATRIX (AVR32_HMATRIX_CLK_PBB % 32)
	HSB Matrix configuration. More...

#define	SYSCLK_SAU_REGS (AVR32_SAU_CLK_PBB % 32)
	Secure Access Unit register. 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...

Querying the system clock and its derived clocks
The following functions may be used to query the current frequency of the system clock and the CPU and bus clocks derived from it. sysclk_get_main_hz() and sysclk_get_cpu_hz() can be assumed to be available on all platforms, although some platforms may define additional accessors for various chip-internal bus clocks. These are usually not intended to be queried directly by generic code.
static uint32_t	sysclk_get_main_hz (void)
	Return the current rate in Hz of the main system clock. More...

static uint32_t	sysclk_get_cpu_hz (void)
	Return the current rate in Hz of the CPU clock. More...

static uint32_t	sysclk_get_hsb_hz (void)
	Return the current rate in Hz of the High-Speed Bus clock. More...

static uint32_t	sysclk_get_pba_hz (void)
	Return the current rate in Hz of the Peripheral Bus A clock. More...

static uint32_t	sysclk_get_pbb_hz (void)
	Return the current rate in Hz of the Peripheral Bus B clock. More...

static uint32_t	sysclk_get_peripheral_bus_hz (const volatile void *module)
	Retrieves the current rate in Hz of the Peripheral Bus clock attached to the specified peripheral. More...

Enabling and disabling synchronous clocks
static void	sysclk_enable_cpu_module (unsigned int index)
	Enable a module clock derived from the CPU clock. More...

static void	sysclk_disable_cpu_module (unsigned int index)
	Disable a module clock derived from the CPU clock. More...

static void	sysclk_enable_hsb_module (unsigned int index)
	Enable a module clock derived from the HSB clock. More...

static void	sysclk_disable_hsb_module (unsigned int index)
	Disable a module clock derived from the HSB clock. More...

static void	sysclk_enable_pba_module (unsigned int index)
	Enable a module clock derived from the PBA clock. More...

static void	sysclk_disable_pba_module (unsigned int index)
	Disable a module clock derived from the PBA clock. More...

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...

static void	sysclk_enable_peripheral_clock (const volatile void *module)
	Enable a peripheral's clock from its base address. More...

static void	sysclk_disable_peripheral_clock (const volatile void *module)
	Disable a peripheral's clock from its base address. 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...

#define AVR32_ACIFB_CLK_PBA 86

#define AVR32_ADCIFB_CLK_PBA 85

#define AVR32_AW_ADDRESS 0xFFFF7000

Referenced by sysclk_disable_peripheral_clock(), sysclk_enable_peripheral_clock(), and sysclk_get_peripheral_bus_hz().

#define AVR32_AW_CLK_PBA 89

#define AVR32_CAT_CLK_PBA 87

#define AVR32_CORE_CLK_CPU_COUNT 16

#define AVR32_GLOC_CLK_PBA 88

#define AVR32_TC1_CLK_PBA 84

Microchip® Advanced Software Framework

Macros

Functions