main.c File Reference

Getting Started Application.

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

#include "asf.h"
#include "stdio_serial.h"
#include "conf_board.h"
#include "conf_clock.h"

Macros
#define	BLINK_PERIOD   1000
	LED0 blink time, LED1 blink half this time, in ms. More...
#define	IRQ_PRIOR_PIO   0
	IRQ priority for PIO (The lower the value, the greater the priority) More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	Button1_Handler (uint32_t id, uint32_t mask)
	Handler for Button 1 rising edge interrupt. More...
static void	configure_buttons (void)
	Configure the Pushbuttons. More...
static void	configure_console (void)
	Interrupt handler for TC0 interrupt. More...
int	main (void)
	getting-started Application entry point. More...
static void	mdelay (uint32_t ul_dly_ticks)
	Wait for the given number of milliseconds (using the g_ul_ms_ticks generated by the SAM's microcontrollers's system tick). More...
static void	ProcessButtonEvt (uint8_t uc_button)
	Process Buttons Events. More...
void	SysTick_Handler (void)
	Handler for System Tick interrupt. More...

Variables
volatile bool	g_b_led0_active = true
	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, LED1 blink half this time, in ms.

#define IRQ_PRIOR_PIO   0

IRQ priority for PIO (The lower the value, the greater the priority)

Referenced by configure_buttons().

#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 Button1_Handler ( uint32_t  id, uint32_t  mask  )

static

Handler for Button 1 rising edge interrupt.

Handle process led1 status change.

References PIN_PUSHBUTTON_1_ID, PIN_PUSHBUTTON_1_MASK, and ProcessButtonEvt().

Referenced by configure_buttons().

static void configure_buttons ( void  )

static

Configure the Pushbuttons.

Configure the PIO as inputs and generate corresponding interrupt when pressed or released.

References Button1_Handler(), IRQ_PRIOR_PIO, PIN_PUSHBUTTON_1_ATTR, PIN_PUSHBUTTON_1_ID, PIN_PUSHBUTTON_1_MASK, PIN_PUSHBUTTON_1_PIO, pio_enable_interrupt(), pio_handler_set(), pio_handler_set_priority(), pio_set_debounce_filter(), and pmc_enable_periph_clk().

Referenced by main().

static void configure_console ( void  )

static

Interrupt handler for TC0 interrupt.

Toggles the state of LED#2. Configure UART console.

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

Referenced by main().

int main

(

void

)

getting-started Application entry point.

Returns

Unused (ANSI-C compatibility).

[main_step_sys_init]

[main_step_sys_init]

[main_step_console_init]

[main_step_console_init]

[main_step_systick_init]

[main_step_systick_init]

[main_step_btn_init]

[main_step_btn_init]

[main_step_loop]

[main_step_loop]

References board_init(), configure_buttons(), configure_console(), g_b_led0_active, IOPORT_DIR_INPUT, ioport_set_pin_dir(), ioport_set_pin_mode(), ioport_set_pin_sense_mode(), ioport_toggle_pin_level(), LED0_GPIO, LED_0_NAME, matrix_get_system_io(), matrix_set_system_io(), mdelay(), PUSHBUTTON_1_NAME, STRING_HEADER, sysclk_get_cpu_hz(), and sysclk_init().

static void mdelay ( uint32_t  ul_dly_ticks )

static

Wait 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 ProcessButtonEvt ( uint8_t  uc_button )

static

Process Buttons Events.

Change active states of LEDs when corresponding button events happened.

References g_b_led0_active, IOPORT_PIN_LEVEL_HIGH, IOPORT_PIN_LEVEL_LOW, ioport_set_pin_level(), LED0_GPIO, tc_start(), and tc_stop().

Referenced by Button1_Handler().

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.

volatile bool g_b_led0_active = true

LED0 blinking control.

Referenced by main(), and ProcessButtonEvt().

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().