AN4141 datasheet(31/42 Pages) STMICROELECTRONICS

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AN4141

HAL to StdPeriph_Lib list of changes

The STM32W108 has four externals interrupts lines: EXTIA, EXTIB, EXTIC and EXTID.

These names are equivalent to IRQA, IRQB, IRQC and IRQD, respectively, in the HAL

library. Using EXTI_InitStruct, the user can configure the desired line on which he wants to

generate an interrupt.

Function EXTI_GetITStatus gives the status of interrupt of a specified line.

The StdPeriph functions cover the HAL code that manages these interrupts. The StdPeriph

and HAL are not fully compliant.

Table 17. STM32W108xx GPIO driver overview

HAL

StdPeriph_Driver

Functionality description

halGpioConfig()

GPIO_StructInit()

Initializes the GPIOx peripheral according to the specified

parameters

halGpioSet()

GPIO_SetBits()

GPIO_ResetBits()

Sets/clears single GPIO bit

GPIO_ReadInputDataBit()

Reads the specified input port pin

GPIO_ReadInputData()

Reads the specified GPIO input data port

GPIO_ReadOutputDataBit()

Reads the specified output data port bit

GPIO_ReadOutputData()

Reads the specified GPIO output data port

GPIO_WriteBit()

Sets or clears the selected data port bit

GPIO_Write()

Writes data to the specified GPIO data port

GPIO_DebugInterfaceCmd()

Enables or disables the debug interface

GPIO_ExternalOverrideCmd()

Enables or disables the REG_EN override of PA7's normal

GPIO configuration

FlagStatus

GPIO_GetDebugFlagStatus()

Checks whether the specified GPIO debug flag is set or not

GPIO_DeInit();

Deinitializes the GPIOx peripheral registers to their default

reset values

Table 18. STM32W108xx EXTI driver overview

StdPeriph_Driver API

Functionality description

EXTI_DeInit()

Deinitializes the EXTI_IRQn line registers to their default reset values

EXTI_Init()

Initializes the EXTI peripheral according to the specified parameters

EXTI_StructInit()

Fills each EXTI_InitStruct member with its reset value

ITStatus EXTI_GetITStatus() Checks whether the specified EXTI line is asserted or not

EXTI_ClearITPendingBit()

Clears the EXTI's line pending bits

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