sam/utils/cmsis/cm4_bit_banding_example/main.c File Reference

Bit Banding Example.

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

#include <math.h>
#include "asf.h"
#include "conf_board.h"

Macros
#define	BITBAND_ALIAS_ADDRESS(addr, bit)
	Calculate bit band alias address. More...

Functions
static __INLINE void	delay_ms (uint32_t ul_dly_ticks)
	Delay number of tick Systicks (happens every 1 ms). More...
static __INLINE void	led_config (void)
	Configure LED pins. More...
int	main (void)
	Application entry point. More...
void	SysTick_Handler (void)
	SysTick_Handler. More...

Variables
volatile uint32_t	g_ul_ms_ticks = 0
	Counts for 1ms timeTicks. More...

#define BITBAND_ALIAS_ADDRESS	(		addr,
			bit
	)

Value:

((volatile uint32_t*)((((uint32_t)(addr) & 0xF0000000) + 0x02000000) \
                          +((((uint32_t)(addr)&0xFFFFF)*32)\
                          +(  (uint32_t)(bit)*4))))

Calculate bit band alias address.

Calculate the bit band alias address and return a pointer address to word.

Parameters

addr	The byte address of bitbanding bit.
bit	The bit position of bitbanding bit.

Referenced by main().

static __INLINE void delay_ms ( uint32_t  ul_dly_ticks )

static

Delay number of tick Systicks (happens every 1 ms).

References g_ul_ms_ticks.

Referenced by main().

static __INLINE void led_config ( void  )

static

Configure LED pins.

Referenced by main().

int main

(

void

)

Application entry point.

Returns

Unused (ANSI-C compatibility).

References BITBAND_ALIAS_ADDRESS, delay_ms(), and led_config().

void SysTick_Handler

(

void

)

SysTick_Handler.

References g_ul_ms_ticks.

volatile uint32_t g_ul_ms_ticks = 0

Counts for 1ms timeTicks.