UM0097 datasheet(29/229 Pages) STMICROELECTRONICS

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UM0097

Peripheral firmware overview

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PCU_32OSCCmd

Example:

This example illustrates how to enable the 32 kHz oscillator.

{ ...

/* Enable the 32 kHz oscillator */

PCU_32OSCCmd(ENABLE);

...

}

3.2

Reset and clock control unit (RCCU)

The RCCU driver may be used for a variety of purposes, including internal clock

configuration and clock source selection.

The first section describes the data structure members used in the RCCU firmware library.

The second section presents the RCCU firmware library functions.

3.2.1

Data structures

RCCU register structure

The RCCU peripheral register structure RCCU_TypeDef is defined in the 71x_map.h file as

follows:

typedef volatile struct

{

vu32 CCR;

u32 EMPTY1;

vu32 CFR;

u32 EMPTY2[3];

vu32 PLL1CR;

vu32 PER;

vu32 SMR;

} RCCU_TypeDef;

Function Name

PCU_32OSCCmd

Function Prototype

void PCU_32OSCCmd (FunctionalState NewState)

Behavior Description

Enables or disables the 32 kHz oscillator

Input Parameter

NewState: specifies whether the 32 kHz oscillator is enabled or

disabled.

– ENABLE: enables the 32 kHz oscillator.

– DISABLE: disables the 32 kHz oscillator.

Output Parameter

None

Return Value

None

Required preconditions

None

Called Functions

None

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