include/delay.h File Reference

Delay functions. More...

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Functions
unsigned int	ns2cyc (unsigned int ns, unsigned int rate)
	Convert from nanoseconds to clock cycles using 32-bit arithmetic.
void	udelay (unsigned long us)
	Delay for a specified number of microseconds.
static void	mdelay (unsigned long ms)
	Delay for a specified number of milliseconds.

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Detailed Description

Delay functions.

• Compiler: IAR EWAVR32 and GNU GCC for AVR32
• Supported devices: All devices
• AppNote:

Author:

Atmel Corporation: http://www.atmel.com
Support and FAQ: http://support.atmel.no/

Definition in file delay.h.

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Function Documentation

static void mdelay

(

unsigned long

ms

)

[inline, static]

Delay for a specified number of milliseconds.

Parameters:

ms

Number of milliseconds to delay.

Definition at line 52 of file delay.h.

References udelay().

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unsigned int ns2cyc	(	unsigned int	ns,
		unsigned int	rate
	)

Convert from nanoseconds to clock cycles using 32-bit arithmetic.

Parameters:

	ns	Number of nanoseconds
	rate	Clock rate in Hz

Returns:

(ns * rate) / 1000000000

Definition at line 53 of file delay.c.

References div_ceil.

void udelay

(

unsigned long

us

)

Delay for a specified number of microseconds.

Since the max CPU frequency at this point is 66 MHz, this function supports delays up to

Parameters:

us

Number of microseconds to delay.

Definition at line 64 of file delay.c.

References div_ceil, and get_cpu_clock_rate().

Referenced by mdelay().

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