HAL LTDC Overview ¶
Introducing LTDC ¶
- group LTDC_Introduction
-
-
This introduction is under development.
-
Module and files ¶
The following diagram illustrates the LTDC module and its associated files.
Component diagram ¶
The following diagram illustrates the software components involved in the LTDC module. It shows the interactions between the user application, HAL drivers, low-level drivers, and the hardware components.
![@startuml
!$ppp = "LTDC"
!use_ppp_ll = 0
!use_ppp_isr = 1
!$use_hal_service = 1
!$use_hal_rcc = 1
!$use_hal_dma = 0
!$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()\nHAL_DMA_Abort_IT"
!$hal_rcc_itf = "\t\t\t\tGetClockFreq()\n\t\t\t\tHAL_RCC_"+$ppp+"_EnableClock()"
!$hal_ppp_itf = "DMA CallBacks\nDMA Half transfer complete CallBack\nError CallBacks"
!$hal_generic_itf = "HAL_GetTick()"
!$ll_ppp_itf = "LL " + $ppp +" API"
!$ppp_xIRQ = $ppp+"x_IRQ"
<style>
componentDiagram {
arrow {
FontSize 12
}
interface {
FontSize 8
}
}
</style>
title $ppp Software Component Diagram whitout <<Core Layer>>
Package "Application Layer" #DarkMagenta {
component [Appli]
interface "$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_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
package "Low Layer" #Technology {
!if (use_ppp_ll == 1)
[$ll_ppp]
interface "$ll_ppp_itf" as LL_PPP_Interface
[$ll_ppp] -u- LL_PPP_Interface
!endif
interface "$ppp_ISR" as PPP_ISR
[$ppp_ISR] -r- PPP_ISR
[CMSIS-Devices]
[$ppp_ISR]
!if ($use_hal_dma == 1)
[DMA ISR]
interface "DMA ISR" as DMA_ISR
[DMA ISR] -u- DMA_ISR
!endif
}
package "HW" #LightCyan {
[STM32_HW]
interface "$ppp_xIRQ" as PPPx_IRQ
[STM32_HW] -u- PPPx_IRQ
!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] .l.> [CMSIS-Devices]: $ppp register def
[STM32_HW] <.u. [$ll_ppp] : $ppp registers R/W
!else
[$ppp_name] .d.> [CMSIS-Devices]: $ppp register def
[STM32_HW] <.l. [$ppp_name] : $ppp registers R/W
!endif
[$ppp_ISR] -d-( PPPx_IRQ
[$ppp_name] -d-( PPP_ISR
@enduml](../../../../_images/plantuml-db1640481ad09c10ab2c4b4cfae1951ff886a8a6.png)
Configuration table ¶
The following table lists the configuration defines for the HAL LTDC module, specifying their locations, default values, and descriptions:
- group LTDC_Configuration_Table
-
¶
Configuration inside the LTDC driver ¶
Config defines
Description
Default value
Note
USE_HAL_LTDC_MODULE
from hal_conf.h
1
When set, HAL LTDC module is enabled
USE_HAL_LTDC_REGISTER_CALLBACKS
from hal_conf.h
0
When set, enable the register callbacks
USE_HAL_LTDC_CLK_ENABLE_MODEL
from hal_conf.h
HAL_CLK_ENABLE_NO
Enable the gating of the peripheral clock
USE_HAL_CHECK_PARAM
from hal_conf.h
0
When set, the vital parameters (pointers or sizes) are checked in runtime .
USE_ASSERT_DBG_PARAM
from PreProcessor env
None
When defined, enable the params assert
USE_ASSERT_DBG_STATE
from PreProcessor env
None
When defined, enable the state assert
USE_HAL_LTDC_USER_DATA
from hal_conf.h
0
When set, user data is defined in handle
USE_HAL_LTDC_GET_LAST_ERRORS
from hal_conf.h
0
When set, user can get the last error code