clock_example3_sam.c File Reference

Clock system example 3.

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

#include "asf.h"
#include "genclk.h"
#include "conf_board.h"
#include "conf_example3.h"

Macros
#define	GCLK_ID   GENCLK_PCK_0
	Programmable Clock ID for the example by default. More...

Functions
int	main (void)
	Switch between various system clock sources and prescalers at run time. More...
static void	mdelay (uint32_t ul_dly_ticks)
	Wait for the given number of milliseconds (using the ul_ms_ticks generated by the SAM microcontroller system tick). More...
void	SysTick_Handler (void)
	Handler for System Tick interrupt. More...
static void	wait_for_switches (void)
	Wait for user push the button. More...

Variables
volatile uint32_t	ul_ms_ticks = 0

#define GCLK_ID   GENCLK_PCK_0

Programmable Clock ID for the example by default.

Referenced by main().

int main

(

void

)

Switch between various system clock sources and prescalers at run time.

Returns

Unused (ANSI-C compatibility).

References board_init(), GCLK_ID, GCLK_PIN, GCLK_PIN_MUX, genclk_config_defaults(), genclk_config_set_divider(), genclk_config_set_source(), genclk_enable(), GENCLK_PCK_PRES_1, GENCLK_PCK_PRES_2, GENCLK_PCK_SRC_MAINCK_8M_RC, GENCLK_PCK_SRC_MAINCK_XTAL, GENCLK_PCK_SRC_PLLACK, GENCLK_PCK_SRC_SLCK_RC, ioport_disable_pin(), ioport_set_pin_mode(), osc_disable(), osc_enable(), OSC_MAINCK_8M_RC, OSC_MAINCK_XTAL, osc_wait_ready(), sysclk_enable_peripheral_clock(), sysclk_init(), SYSCLK_PRES_1, SYSCLK_PRES_2, sysclk_set_prescalers(), sysclk_set_source(), SYSCLK_SRC_MAINCK_8M_RC, SYSCLK_SRC_MAINCK_XTAL, SYSCLK_SRC_SLCK_RC, and wait_for_switches().

static void mdelay ( uint32_t  ul_dly_ticks )

static

Wait for the given number of milliseconds (using the ul_ms_ticks generated by the SAM microcontroller system tick).

Parameters

ul_dly_ticks

Delay to wait for, in milliseconds.

References ul_ms_ticks.

Referenced by wait_for_switches().

void SysTick_Handler

(

void

)

Handler for System Tick interrupt.

Process System Tick Event Increments the ul_ms_ticks counter.

References ul_ms_ticks.

static void wait_for_switches ( void  )

static

Wait for user push the button.

References ioport_get_pin_level(), and mdelay().

Referenced by main().

volatile uint32_t ul_ms_ticks = 0