This module provides simple loop-based delay routines for those applications requiring a brief wait during execution.
Common API for UC3, XMEGA, and AVR MEGA.
#define delay_init |
( |
|
fcpu_hz | ) |
|
Initialize the delay driver.
- Parameters
-
fcpu_hz | CPU frequency in Hz |
- Deprecated:
- This function is provided for compatibility with ASF applications that may not have been updated to configure the system clock via the common clock service; e.g. sysclk_init() and a configuration header file are used to configure clocks.
The functions in this module call sysclk_get_cpu_hz() function to obtain the system clock frequency.
Delay in milliseconds.
- Parameters
-
delay | Delay in milliseconds |
Referenced by mxt_init().
Delay in seconds.
- Parameters
-
Delay in microseconds.
- Parameters
-
delay | Delay in microseconds |
MCU Clock Frequency (Hertz)
- Deprecated:
- The F_CPU configuration constant is used for compatibility with the Busy-Wait Delay Routines routines. The common loop-based delay routines are designed to use the Clock Management modules while anticipating support for legacy applications assuming a statically defined clock frequency. Applications using a statically configured MCU clock frequency can define F_CPU (Hertz), in which case the common delay routines will use this value rather than calling sysclk_get_cpu_hz() to get the current MCU clock frequency.