sam4s/osc.h File Reference

Chip-specific oscillator management functions.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include "board.h"
#include "pmc.h"

Macros
#define	BOARD_FREQ_MAINCK_BYPASS   (12000000UL)
#define	BOARD_FREQ_MAINCK_XTAL   (12000000UL)
#define	BOARD_FREQ_SLCK_BYPASS   (32768UL)
#define	BOARD_FREQ_SLCK_XTAL   (32768UL)
#define	BOARD_OSC_STARTUP_US   (15625UL)
Oscillator identifiers
#define	OSC_SLCK_32K_RC   0
	Internal 32kHz RC oscillator. More...
#define	OSC_SLCK_32K_XTAL   1
	External 32kHz crystal oscillator. More...
#define	OSC_SLCK_32K_BYPASS   2
	External 32kHz bypass oscillator. More...
#define	OSC_MAINCK_4M_RC   3
	Internal 4MHz RC oscillator. More...
#define	OSC_MAINCK_8M_RC   4
	Internal 8MHz RC oscillator. More...
#define	OSC_MAINCK_12M_RC   5
	Internal 12MHz RC oscillator. More...
#define	OSC_MAINCK_XTAL   6
	External crystal oscillator. More...
#define	OSC_MAINCK_BYPASS   7
	External bypass oscillator. More...
Oscillator clock speed in hertz
#define	OSC_SLCK_32K_RC_HZ   CHIP_FREQ_SLCK_RC
	Internal 32kHz RC oscillator. More...
#define	OSC_SLCK_32K_XTAL_HZ   BOARD_FREQ_SLCK_XTAL
	External 32kHz crystal oscillator. More...
#define	OSC_SLCK_32K_BYPASS_HZ   BOARD_FREQ_SLCK_BYPASS
	External 32kHz bypass oscillator. More...
#define	OSC_MAINCK_4M_RC_HZ   CHIP_FREQ_MAINCK_RC_4MHZ
	Internal 4MHz RC oscillator. More...
#define	OSC_MAINCK_8M_RC_HZ   CHIP_FREQ_MAINCK_RC_8MHZ
	Internal 8MHz RC oscillator. More...
#define	OSC_MAINCK_12M_RC_HZ   CHIP_FREQ_MAINCK_RC_12MHZ
	Internal 12MHz RC oscillator. More...
#define	OSC_MAINCK_XTAL_HZ   BOARD_FREQ_MAINCK_XTAL
	External crystal oscillator. More...
#define	OSC_MAINCK_BYPASS_HZ   BOARD_FREQ_MAINCK_BYPASS
	External bypass oscillator. More...

Functions
static void	osc_disable (uint32_t ul_id)
static void	osc_enable (uint32_t ul_id)
static uint32_t	osc_get_rate (uint32_t ul_id)
static bool	osc_is_ready (uint32_t ul_id)

#define BOARD_FREQ_MAINCK_BYPASS   (12000000UL)

Referenced by osc_get_rate().

#define BOARD_FREQ_MAINCK_XTAL   (12000000UL)

Referenced by main(), and osc_get_rate().

#define BOARD_FREQ_SLCK_BYPASS   (32768UL)

Referenced by osc_get_rate().

#define BOARD_FREQ_SLCK_XTAL   (32768UL)

Referenced by config_uart_and_pck(), configure_watchdog(), main(), and osc_get_rate().

#define BOARD_OSC_STARTUP_US   (15625UL)

Referenced by main(), osc_enable(), run_switch_mainck_as_mck_test(), set_default_working_clock(), sys_enter_wait_mode(), and user_change_clock().