Class hal::cortex_m::dwt_counter
ClassList > hal > cortex_m > dwt_counter
A counter with a frequency fixed to the CPU clock rate. More...
#include <dwt_counter.hpp>
Inherits the following classes: hal::steady_clock
Public Functions
| Type | Name |
|---|---|
| dwt_counter (hertz p_cpu_frequency) Construct a new dwt counter object. |
|
| void | register_cpu_frequency (hertz p_cpu_frequency) Inform the driver of the operating frequency of the CPU in order to generate the correct uptime. |
Public Functions inherited from hal::steady_clock
| Type | Name |
|---|---|
| frequency_t | frequency () Get the operating frequency of the steady clock. |
| uptime_t | uptime () Get the current value of the steady clock. |
| virtual | ~steady_clock () = default |
Detailed Description
This driver is supported for Cortex M3 devices and above.
Public Functions Documentation
function dwt_counter
Construct a new dwt counter object.
hal::cortex_m::dwt_counter::dwt_counter (
hertz p_cpu_frequency
)
Parameters:
p_cpu_frequency- the operating frequency of the CPU
function register_cpu_frequency
Inform the driver of the operating frequency of the CPU in order to generate the correct uptime.
void hal::cortex_m::dwt_counter::register_cpu_frequency (
hertz p_cpu_frequency
)
Use this when the CPU's operating frequency has changed and no longer matches the frequency supplied to the constructor. Care should be taken when expecting this function when there is the potentially other parts of the system that depend on this counter's uptime to operate.
Parameters:
p_cpu_frequency- the operating frequency of the CPU
The documentation for this class was generated from the following file libraries/include/libhal-armcortex/dwt_counter.hpp