main_sam4l.c File Reference

Getting Started Application.

Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"

Macros
#define	BLINK_PERIOD   1000
	LED0 blink time, in ms. More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	configure_button (void)
	Configure push button 0 to generate an EIC interrupt. More...
static void	configure_console (void)
	Configure UART console. More...
static void	configure_tc (void)
	Configure Timer Counter 0 to generate an interrupt every 200ms. More...
int	main (void)
	getting-started Application entry point. More...
static void	mdelay (uint32_t ul_dly_ticks)
	Waits for the given number of milliseconds (using the g_ul_ms_ticks generated by the SAM's microcontrollers's system tick). More...
static void	set_toggle_flag (void)
	Interrupt handler for EIC interrupt. More...
void	SysTick_Handler (void)
	Handler for System Tick interrupt. More...
void	TC00_Handler (void)
	Interrupt handler for TC00 interrupt. More...

Variables
volatile uint32_t	g_b_led0_active = 1
	LED0 blinking control. More...
volatile uint32_t	g_ul_ms_ticks = 0
	Global g_ul_ms_ticks in milliseconds since start of application. More...

#define BLINK_PERIOD   1000

LED0 blink time, in ms.

Referenced by main().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

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

Referenced by main().

static void configure_button ( void  )

static

Configure push button 0 to generate an EIC interrupt.

References eic_line_config::eic_async, EIC_ASYNCH_MODE, eic_line_config::eic_edge, EIC_EDGE_FALLING_EDGE, eic_enable(), eic_line_config::eic_filter, EIC_FILTER_DISABLED, eic_line_config::eic_level, EIC_LEVEL_LOW_LEVEL, eic_line_enable(), eic_line_set_callback(), eic_line_set_config(), eic_line_config::eic_mode, EIC_MODE_EDGE_TRIGGERED, GPIO_PUSH_BUTTON_EIC_IRQ, GPIO_PUSH_BUTTON_EIC_LINE, and set_toggle_flag().

Referenced by main().

static void configure_console ( void  )

static

Configure UART console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, and stdio_serial_init().

Referenced by main().

static void configure_tc ( void  )

static

Configure Timer Counter 0 to generate an interrupt every 200ms.

References sysclk_enable_peripheral_clock(), sysclk_get_cpu_hz(), tc_enable_interrupt(), tc_find_mck_divisor(), tc_init(), tc_start(), and tc_write_rc().

Referenced by main().

int main

(

void

)

getting-started Application entry point.

Returns

Unused (ANSI-C compatibility).

References BLINK_PERIOD, board_init(), BUTTON_0_NAME, configure_button(), configure_console(), configure_tc(), g_b_led0_active, LED0, LED_Toggle, mdelay(), STRING_HEADER, sysclk_get_cpu_hz(), and sysclk_init().

static void mdelay ( uint32_t  ul_dly_ticks )

static

Waits for the given number of milliseconds (using the g_ul_ms_ticks generated by the SAM's microcontrollers's system tick).

Parameters

ul_dly_ticks

Delay to wait for, in milliseconds.

References g_ul_ms_ticks.

Referenced by main().

static void set_toggle_flag ( void  )

static

Interrupt handler for EIC interrupt.

References eic_line_clear_interrupt(), eic_line_interrupt_is_pending(), g_b_led0_active, GPIO_PUSH_BUTTON_EIC_LINE, LED0, and LED_Off.

Referenced by configure_button().

void SysTick_Handler

(

void

)

Handler for System Tick interrupt.

Process System Tick Event Increments the g_ul_ms_ticks counter.

References g_ul_ms_ticks.

void TC00_Handler

(

void

)

Interrupt handler for TC00 interrupt.

References tc_get_status(), and UNUSED.

volatile uint32_t g_b_led0_active = 1

LED0 blinking control.

Referenced by main(), and set_toggle_flag().

volatile uint32_t g_ul_ms_ticks = 0

Global g_ul_ms_ticks in milliseconds since start of application.

Referenced by mdelay(), and SysTick_Handler().