freqm_example.c File Reference

FREQM example driver for AVR UC3.

This file provides an example for the FREQM on AVR UC3 devices.

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

#include "board.h"
#include "gpio.h"
#include "intc.h"
#include "usart.h"
#include "freqm.h"
#include "print_funcs.h"
#include "power_clocks_lib.h"
#include "conf_board.h"

Macros
#define	OSC32K_FREQ_HZ   32768

Functions
int	clock_measure (void)
	Measured and get result after configuration. More...
void	display_result (uint32_t refhz, uint32_t duration, uint32_t msrhz)
	Output result through usart. More...
int	main (void)
	main function More...

#define OSC32K_FREQ_HZ   32768

Referenced by clock_measure(), and main().

int clock_measure

(

void

)

Measured and get result after configuration.

Returns

Result of measured clock frequency(Hz)

References ERR_TIMEOUT, EXAMPLE_USART, freqm_get_result(), freqm_start(), OSC32K_FREQ_HZ, status, and usart_write_line().

Referenced by main().

void display_result	(	uint32_t	refhz,
		uint32_t	duration,
		uint32_t	msrhz
	)

Output result through usart.

Parameters

refhz	Frequency of reference clock(Hz)
duration	Reference clock cycles
msrhz	Frequency of measured clock(Hz)

References print_dbg(), and print_dbg_ulong().

Referenced by main().

int main

(

void

)

main function

References usart_options_t::baudrate, clock_measure(), cpu_irq_enable, display_result(), ERR_TIMEOUT, EXAMPLE_USART, EXAMPLE_USART_RX_FUNCTION, EXAMPLE_USART_RX_PIN, EXAMPLE_USART_TX_FUNCTION, EXAMPLE_USART_TX_PIN, FPBA, freqm_enable(), freqm_enable_measurement_done_int(), freqm_set_clock_source(), freqm_start(), freqm_write_config(), gpio_enable_module(), INTC_init_interrupts(), INTC_register_interrupt(), scif_osc32_opt_t::mode, OSC32K_FREQ_HZ, PM_CKSEL_DIVRATIO_16, PM_CLK_DOMAIN_3, pm_set_clk_domain_div(), SCIF_OSC_MODE_2PIN_CRYSTAL, SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR, scif_start_osc32(), status, sysclk_init(), USART_1_STOPBIT, USART_GPIO_MAP, usart_init_rs232(), USART_NO_PARITY, USART_OPTIONS, and usart_write_line().