arch/avr32/delay.c File Reference
AVR32-specific delay implementation. More...
#include <delay.h>
#include <types.h>
#include <util.h>
#include <arch/sysreg.h>
#include <chip/clk.h>
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Functions | |
| void | udelay (unsigned long us) |
| Delay for a specified number of microseconds. | |
Detailed Description
AVR32-specific delay implementation.This implementation of udelay() uses the architecture-specified COUNT system register. Note that this breaks on some chips when the COUNT/COMPARE interrupt is used.
- Compiler: IAR EWAVR32 and GNU GCC for AVR32
- Supported devices: All AVR32 devices
- AppNote:
Definition in file delay.c.
Function Documentation
| 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
![\[ \frac{2^{31}}{66000000} \approx 32 \textnormal{s} \]](form_0.png)
- 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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