25-03-2021

Delay

31 synonyms of delay from the Merriam-Webster Thesaurus, plus 52 related words, definitions, and antonyms. Find another word for delay. Delay: an instance. Definition of delay in the Definitions.net dictionary. Meaning of delay. What does delay mean? Information and translations of delay in the most comprehensive dictionary definitions resource on the web.

In this article. Azure Pipelines. Use this task in an agentless job of a release pipeline to pause execution of the pipeline for a fixed delay time. 'It was simply,' replied Colbert, quickly, 'the fear of causing your majesty the least delay; for, according to established etiquette, you cannot enter any place, with the exception of your own royal residences, until the soldiers' quarters have been marked out by the quartermaster, and the garrison properly distributed.'


Also found in: Dictionary, Thesaurus, Legal, Idioms, Encyclopedia, Wikipedia.
Related to delay: developmental delay, Propagation delay

delay

Delay [de-la´]
atrioventricular delay (AV delay) atrioventricular interval (def. 2).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

delay

Delay (dĕ-lā'),
1. In a medical sense, to put off for a time, either for clinical reasons or through physiologic dysfunction.
Farlex Partner Medical Dictionary © Farlex 2012

de·lay

(dĕ-lā')
[O.Fr. deslaier, fr. Germanic]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

School Closings And Delays

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.
Link to this page: Delay

Macros

#define F_CPU 1000000UL

Functions

void _delay_ms (double __ms)
void _delay_us (double __us)

Detailed Description

//#define F_CPU 14.7456E6
Note
As an alternative method, it is possible to pass the F_CPU macro down to the compiler from the Makefile. Obviously, in that case, no #define statement should be used.

The functions in this header file are wrappers around the basic busy-wait functions from <util/delay_basic.h>. They are meant as convenience functions where actual time values can be specified rather than a number of cycles to wait for. The idea behind is that compile-time constant expressions will be eliminated by compiler optimization so floating-point expressions can be used to calculate the number of delay cycles needed based on the CPU frequency passed by the macro F_CPU.

Note
In order for these functions to work as intended, compiler optimizations must be enabled, and the delay time must be an expression that is a known constant at compile-time. If these requirements are not met, the resulting delay will be much longer (and basically unpredictable), and applications that otherwise do not use floating-point calculations will experience severe code bloat by the floating-point library routines linked into the application.

The functions available allow the specification of microsecond, and millisecond delays directly, using the application-supplied macro F_CPU as the CPU clock frequency (in Hertz).

Macro Definition Documentation

CPU frequency in Hz.

The macro F_CPU specifies the CPU frequency to be considered by the delay macros. This macro is normally supplied by the environment (e.g. from within a project header, or the project's Makefile). The value 1 MHz here is only provided as a 'vanilla' fallback if no such user-provided definition could be found.

In terms of the delay functions, the CPU frequency can be given as a floating-point constant (e.g. 3.6864E6 for 3.6864 MHz). However, the macros in <util/setbaud.h> require it to be an integer value.

Function Documentation

Perform a delay of __ms milliseconds, using _delay_loop_2().

The macro F_CPU is supposed to be defined to a constant defining the CPU clock frequency (in Hertz).

The maximal possible delay is 262.14 ms / F_CPU in MHz.

When the user request delay which exceed the maximum possible one, _delay_ms() provides a decreased resolution functionality. In this mode _delay_ms() will work with a resolution of 1/10 ms, providing delays up to 6.5535 seconds (independent from CPU frequency). The user will not be informed about decreased resolution.

If the avr-gcc toolchain has __builtin_avr_delay_cycles() support, maximal possible delay is 4294967.295 ms/ F_CPU in MHz. For values greater than the maximal possible delay, overflows results in no delay i.e., 0ms.

Conversion of __ms into clock cycles may not always result in integer. By default, the clock cycles rounded up to next integer. This ensures that the user gets at least __ms microseconds of delay.

Alternatively, by defining the macro __DELAY_ROUND_DOWN__, or __DELAY_ROUND_CLOSEST__, before including this header file, the algorithm can be made to round down, or round to closest integer, respectively.

Note

The implementation of _delay_ms() based on __builtin_avr_delay_cycles() is not backward compatible with older implementations. In order to get functionality backward compatible with previous versions, the macro '__DELAY_BACKWARD_COMPATIBLE__' must be defined before including this header file. Also, the backward compatible algorithm will be chosen if the code is compiled in a freestanding environment (GCC option -ffreestanding), as the math functions required for rounding are not available to the compiler then.

Perform a delay of __us microseconds, using _delay_loop_1().

The macro F_CPU is supposed to be defined to a constant defining the CPU clock frequency (in Hertz).

The maximal possible delay is 768 us / F_CPU in MHz.

If the user requests a delay greater than the maximal possible one, _delay_us() will automatically call _delay_ms() instead. The user will not be informed about this case.

If the avr-gcc toolchain has __builtin_avr_delay_cycles() support, maximal possible delay is 4294967.295 us/ F_CPU in MHz. For values greater than the maximal possible delay, overflow results in no delay i.e., 0us.

Conversion of __us into clock cycles may not always result in integer. By default, the clock cycles rounded up to next integer. This ensures that the user gets at least __us microseconds of delay.

Delayed Reaction To Covid Vaccine

Alternatively, by defining the macro __DELAY_ROUND_DOWN__, or __DELAY_ROUND_CLOSEST__, before including this header file, the algorithm can be made to round down, or round to closest integer, respectively.

Note

The implementation of _delay_ms() based on __builtin_avr_delay_cycles() is not backward compatible with older implementations. In order to get functionality backward compatible with previous versions, the macro __DELAY_BACKWARD_COMPATIBLE__ must be defined before including this header file. Also, the backward compatible algorithm will be chosen if the code is compiled in a freestanding environment (GCC option -ffreestanding), as the math functions required for rounding are not available to the compiler then.