STM32C5xx HAL Drivers
HAL EXTI Overview ¶
Introducing EXTI ¶
- group EXTI_Introduction
-
The EXTI hardware abstraction layer provides a set of APIs to interface with the EXTI peripheral on STM32 microcontrollers.
The EXTI peripheral manages each line (configurable and direct) using a state machine per line. The EXTI includes the following features:
Initialize a line.
Configure a line.
Enable a line in a specific mode (interrupt or event).
Force a software interrupt on a specific line.
Manage interrupts for a specific line.
This abstraction layer guarantees portability and ease of use across different STM32 series.
Module and files ¶
The following diagram illustrates the EXTI module and its associated files.
Component diagram ¶
The following diagram illustrates the software components involved in the EXTI module. It shows the interactions between the user application, HAL drivers, low-level drivers, and the hardware components.
![@startuml
!$use_ppp_core = 0
!$use_ll_rcc = 0
!$use_ppp_ll = 1
!$use_ppp_hal = 1
!$use_api_itf = 1
!$use_hal_itf = 1
!$use_ll_itf = 1
!$use_core_itf = 1
!$use_hal_generic_dep = 1
!$use_ppp_isr = 1
!$use_hal_service = 0
!$use_hal_rcc = 0
!$use_hal_dma = 0
!$use_kernel_clock = 1
!$core = "XXX" + "_CORE"
!$ppp = "EXTI"
!$hal_api_itf = "HAL " + $ppp + " API"
!$appli_itf = "User Callback"
!$ppp_name = "HAL_"+$ppp
!$ppp_ISR = $ppp+" ISR"
!$ll_ppp = "LL_"+$ppp
!$hal_dma_itf = "HAL_DMA_StartDirectXfer_IT_Opt()\nHAL_DMA_Abort_IT"
!if ($use_kernel_clock == 1)
!$hal_rcc_itf = "\t\t\tHAL_RCC_"+$ppp+"_GetClockFreq()\n\t\t\tHAL_RCC_"+$ppp+"_EnableClock()"
!else
!$hal_rcc_itf = "\t\t\tHAL_RCC_"+$ppp+"_EnableClock()"
!endif
!$hal_ppp_itf = "Half transfer complete\nTransfer complete\nError callback\nAbort callback"
!$hal_generic_itf = "HAL_GetTick()"
!$ll_ppp_itf = "LL " + $ppp +" API"
!$ppp_xIRQ = $ppp+"x_IRQ"
<style>
componentDiagram {
arrow {
FontSize 8
}
interface {
FontSize 8
}
}
</style>
title $ppp Software Component Diagram
Package "Application Layer" #DarkMagenta {
component [Appli]
interface "$appli_itf" as APPLI_Interface
[Appli] -r- APPLI_Interface
}
package "HAL" #DarkOrange {
[$ppp_name]
!if ($use_hal_dma == 1)
interface "$hal_ppp_itf" as HAL_PPP_Interface
[$ppp_name] -d- HAL_PPP_Interface
!endif
interface "$hal_api_itf" as HAL_PPP_APPLI_Interface
[$ppp_name] -u- HAL_PPP_APPLI_Interface
!if ($use_hal_service == 1)
[HAL_SERVICE]
interface "$hal_generic_itf" as HAL_Service_Interface
[HAL_SERVICE] -r- HAL_Service_Interface
[$ppp_name] -l-( HAL_Service_Interface
!endif
!if ($use_hal_generic_dep == 1)
[HAL_SERVICE]
[$ppp_name] .r.> [HAL_SERVICE]
!endif
!if ($use_hal_dma == 1)
[HAL_DMA]
interface "$hal_dma_itf" as HAL_DMA_Interface
[HAL_DMA] -u- HAL_DMA_Interface
[HAL_DMA] -u-( HAL_PPP_Interface
[$ppp_name] --( HAL_DMA_Interface
!endif
!if ($use_hal_rcc == 1)
[HAL_RCC]
interface "$hal_rcc_itf" as HAL_RCC_Interface
[HAL_RCC] -l- HAL_RCC_Interface
[$ppp_name] -r-( HAL_RCC_Interface
!endif
}
[Appli] -d-( HAL_PPP_APPLI_Interface
[$ppp_name] -u-( APPLI_Interface
!if ($use_ppp_core ==1)
Package "Core Layer" #Lavender{
[$core]
interface "core API" as Core_api_itf
[$core] -u- Core_api_itf
}
[$ppp_name] -d-( Core_api_itf
!endif
package "Low Layer" #Technology {
[CMSIS-Devices]
!if ($use_ppp_ll == 1)
[$ll_ppp]
interface "$ll_ppp_itf" as LL_PPP_Interface
[$ll_ppp] -u- LL_PPP_Interface
!endif
!if ($use_ppp_isr == 1)
interface "$ppp_ISR" as PPP_ISR
[$ppp_ISR] -U- PPP_ISR
[$ppp_ISR]
!endif
!if ($use_ll_rcc == 1)
[LL_RCC]
interface "LL RCC API" as LL_RCC_API
[LL_RCC] -u- LL_RCC_API
[HAL_RCC] -d-(LL_RCC_API
!endif
!if ($use_hal_dma == 1)
[DMA ISR]
interface "DMA ISR" as DMA_ISR
[DMA ISR] -u- DMA_ISR
!endif
}
package "HW" #LightCyan {
[STM32_HW]
!if ($use_ppp_isr == 1)
interface "$ppp_xIRQ" as PPPx_IRQ
[STM32_HW] -u- PPPx_IRQ
!endif
!if ($use_hal_dma == 1)
interface "DMAx_IRQ_Ch" as DMA_IRQ_CH
[STM32_HW] -u- DMA_IRQ_CH
[DMA ISR] -d-( DMA_IRQ_CH
[HAL_DMA] --( DMA_ISR
!endif
}
!if ($use_ppp_ll == 1)
[$ppp_name] -d-( LL_PPP_Interface
[$ll_ppp] .r.> [CMSIS-Devices]: $ppp register def
[STM32_HW] <.u. [$ll_ppp] : $ppp registers R/W
!else
!if ($use_ppp_core == 1)
[$core] .l.> [CMSIS-Devices]: $ppp register def
[STM32_HW] <.u. [$core] : $ppp registers R/W
!else
[$ppp_name] .d.> [CMSIS-Devices]: $ppp register def
[STM32_HW] <.l. [$ppp_name] : $ppp registers R/W
!endif
!endif
!if ($use_ppp_isr == 1)
[$ppp_ISR] -d-( PPPx_IRQ
[$ppp_name] -d-( PPP_ISR
!endif
!if ($use_ll_rcc == 1)
[STM32_HW] <.u. [LL_RCC] : RCC registers R/W
!endif
@enduml](../../../../_images/plantuml-f228a9eaf91c3bfb563b5e51e3e4e79717f3dd11.png)
Configuration table ¶
The following table lists the configuration defines for the HAL EXTI module, specifying their locations, default values, and descriptions:
- group EXTI_Configuration_Table
-
Configuration inside the EXTI driver ¶
Config defines
Description
Default value
Note
USE_ASSERT_DBG_PARAM
from IDE
None
Enables parameter assertions when defined
USE_ASSERT_DBG_STATE
from IDE
None
Enables state assertions when defined
USE_HAL_CHECK_PARAM
from hal_conf.h
0
Parameters such as pointers are checked at runtime
USE_HAL_EXTI_MODULE
from hal_conf.h
1
If defined, stm32c5xx_hal_exti.h is included
USE_HAL_EXTI_REGISTER_CALLBACKS
from hal_conf.h
0
If defined, EXTI register callbacks are enabled
USE_HAL_EXTI_USER_DATA
from hal_conf.h
0
If defined, allows the use of user data
CMSE_SECURE_EXECUTION_ENVIRONMENT
from stm32tnxx.h
NA
Defined in secure context