freqm_example.c File Reference

Frequency Meter Example for SAM4L.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"

Macros
#define	STRING_EOL   "\r"
#define	STRING_HEADER
Example configuration
#define	GCLK_ID   0
	Generic clock ID. More...
#define	GCLK_SOURCE   GENCLK_SRC_CLK_CPU
	Generic clock source. More...
#define	GCLK_DIV   1
	Generic clock divider. More...

Functions
static void	configure_console (void)
	Configure UART console. More...
int	main (void)
	Application entry point for freqm example. More...

Variables
struct freqm_config	g_freqm_cfg
	FREQM configuration. More...
struct freqm_dev_inst	g_freqm_inst
	FREQM instance. More...

#define GCLK_DIV   1

Generic clock divider.

This is how much the generic clock should divide the frequency of the configured clock source by.

Referenced by main().

#define GCLK_ID   0

Generic clock ID.

GENCLK Configuration Value.

This is the ID of the generic clock to use.

Referenced by main().

#define GCLK_SOURCE   GENCLK_SRC_CLK_CPU

Generic clock source.

This is the clock source to use for the generic clock.

Referenced by main().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- Freqm Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

static void configure_console ( void  )

static

Configure UART console.

References uart_rs232_options::baudrate, and stdio_serial_init().

Referenced by main().

int main

(

void

)

Application entry point for freqm example.

Returns

Unused (ANSI-C compatibility).

References board_init(), configure_console(), freqm_config::duration, FREQM_DURATION_DEFAULT, freqm_enable(), freqm_get_config_defaults(), freqm_get_result_blocking(), freqm_init(), freqm_start_measure(), g_freqm_cfg, g_freqm_inst, GCLK_DIV, GCLK_ID, GCLK_SOURCE, genclk_enable_config(), freqm_config::msr_clk, osc_disable(), osc_enable(), OSC_ID_OSC0, OSC_ID_RCSYS, OSC_RC32K_NOMINAL_HZ, OSC_RCSYS_NOMINAL_HZ, osc_wait_ready(), pll_config_init(), pll_enable(), PLL_SRC_OSC0, pll_wait_for_lock(), freqm_config::ref_clk, STATUS_OK, STRING_HEADER, and sysclk_init().

struct freqm_config g_freqm_cfg

FREQM configuration.

struct freqm_dev_inst g_freqm_inst

FREQM instance.