UM0097 datasheet(52/229 Pages) STMICROELECTRONICS

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Peripheral firmware overview

UM0097

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APB_SwResetConfig

Note:

One or more peripheral software resets can be enabled on the same APB bridge with a

single APB_SwResetConfig function call. One or more peripheral software resets can be

disabled with another APB_SwResetConfig function call.

It is not possible to simultaneously enable and disable several peripheral software resets in

a single APB_SwResetConfig function call.

Example:

This example illustrates how to configure the BSPI0 and the BSPI1 peripherals to be kept

always under reset:

{

APB_SwResetConfig (APB1, ENABLE, BSPI0_Periph | BSPI1_Periph);

}

3.4

Enhanced interrupt controller (EIC)

The driver may be used for several purposes, such as enabling and disabling interrupts

(IRQ) and fast interrupts (FIQ), enabling and disabling individual IRQ channels, changing

IRQ channel priorities, saving and restoring context and installing IRQ handlers.

The first and the second sections describe the data structure and the common parameter

values. The second one presents the EIC firmware library functions.

Function Name

APB_SwResetConfig

Function Prototype

void APB_SwResetConfig (APB_TypeDef *APBx,

FunctionalState New_Status, u16 Periph);

Behavior Description

This function enables/disables the software reset for the specified

peripheral on the specified APB Bridge. It updates the bits[14:0] of the

SWRES register with the value of the input parameter.

Input Parameter 1

APBx: selects the APB bridge (APB1 or APB2).

Input Parameter 2

New_Status: the peripheral software reset new status to be set.

– ENABLE: The peripheral is kept under reset

– DISABLE: The peripheral is reset by the system-wide reset

Input Parameter 3

Periph: specifies the APB bridge peripheral:

Refer to Bridge peripheral codes on page 49 for more details on the

allowed values of this parameter.

Output Parameter

None

Return Value

None

Required preconditions

None

Called Functions

None

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