Skip to content
STMicroelectronics Logo
Type to start searching
  • Table Of Contents
  • STM32 HAL/LL Drivers Documentation
  • Drivers Overview
  • STM32U5 HAL/LL Drivers Documentation
    • STM32U5 Drivers Overview
    • HAL Drivers
      • HAL Common Drivers
      • HAL ADC
      • HAL ADF
      • HAL AES
      • HAL COMP
      • HAL CORDIC
      • HAL CORTEX
      • HAL CRC
      • HAL CRS
      • HAL DAC
      • HAL DBGMCU
      • HAL DCACHE
      • HAL DCMI
      • HAL DMA2D
      • HAL DMA
      • HAL DSI
      • HAL EXTI
      • HAL FDCAN
      • HAL FLASH
      • HAL FMAC
      • HAL GFXMMU
      • HAL GFXTIM
      • HAL GPIO
      • HAL GPU2D
      • HAL GTZC
      • HAL HASH
      • HAL HCD
      • HAL I2C
      • HAL ICACHE
      • HAL IWDG
      • HAL JPEG
      • HAL LPTIM
      • HAL LTDC
      • HAL MDF
      • HAL MMC
      • HAL NOR
      • HAL OPAMP
      • HAL PCD
        • HAL PCD Overview
        • HAL PCD How to Use
        • HAL PCD Use Cases
          • HAL PCD Use Cases
            • prerequisite
            • initialization_seq
        • HAL PCD APIs
      • HAL PKA
      • HAL PSSI
      • HAL PWR
      • HAL Q
      • HAL RAMCFG
      • HAL RCC
      • HAL RNG
      • HAL RTC
      • HAL SAI
      • HAL SD
      • HAL SDIO
      • HAL SMARTCARD
      • HAL SMBUS
      • HAL SPI
      • HAL SRAM
      • HAL SYSCFG
      • HAL TAMP
      • HAL TIM
      • HAL UART
      • HAL UCPD
      • HAL USART
      • HAL VREFBUF
      • HAL WWDG
      • HAL XSPI
    • LL Drivers
  • HAL PCD Use Cases
    • prerequisite
    • initialization_seq

HAL PCD Use Cases ¶

prerequisite ¶

@startuml ==Prerequisite== ' To add a number by line 'autonumber ' Fix order of each column participant "User Application" as part1 participant "Driver PCD" as part2 Participant "USB OTG CORE" as part4 Participant "USB DRD CORE" as part5 participant "System" as part3 part1->part3 : HAL_Init() part3 --> part1 part1->part3 : Configure system clock part3 --> part1 part1->part3 : Configure GPIO, NVIC @enduml

Functions called:

  • HAL_Init()

initialization_seq ¶

@startuml participant App as "User application" participant "<font color=green><b>HAL PCD Driver</b></font>" as PCD participant "USB DRD CORE" as DRD participant "USB OTG CORE " as OTG participant "PCD_IRQHandler " as IRQ == Initialization == App -> PCD : HAL_PCD_Init alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_PCD_InitDriver OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_PCD_InitDriver DRD-->PCD end App <-- PCD : HAL_OK or HAL_INVALID_PARAM == Configuration== App -> PCD : HAL_PCD_SetConfig alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_DisableGlobalInterrupt OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_DisableGlobalInterrupt DRD-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_InitCore OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_InitCore DRD-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_SetCurrentMode OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_SetCurrentMode DRD-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_InitDevice OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_InitDevice DRD-->PCD end alt#grey #lightgrey if (p_config->lpm_enable == 1U): PCD->OTG : If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS)\n USB_OTG_LPM_Activate OTG-->PCD PCD->DRD : If (instance == HAL_PCD_DRD_FS) \n USB_DRD_LPM_Activate DRD-->PCD end alt#grey #lightgrey if (p_config->battery_charging_enable == 1U): hpcd->driver.bcd_activate PCD->OTG : If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) \n USB_OTG_BCD_Activate OTG-->PCD PCD->DRD : If (instance == HAL_PCD_DRD_FS) \n USB_DRD_BCD_Activate DRD-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_DisconnectDevice OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_DisconnectDevice DRD-->PCD end App <-- PCD :HAL_OK or HAL_ERROR == Process== App -> PCD : HAL_PCD_Start alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_EnableGlobalInterrupt OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_EnableGlobalInterrupt DRD-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) PCD->OTG : USB_OTG_ConnectDevice OTG-->PCD end alt#grey #lightgrey If (instance == HAL_PCD_DRD_FS) PCD->DRD : USB_DRD_ConnectDevice DRD-->PCD end IRQ ->PCD : HAL_PCD_IRQHandler alt#grey #lightgrey HAL_PCD_DRD_IRQHandler PCD->DRD : If (instance == HAL_PCD_DRD_FS) end alt#grey #lightgrey HAL_PCD_OTG_IRQHandler PCD->OTG : If (instance == HAL_PCD_OTG_FS) or (instance ==HAL_PCD_OTG_HS) end PCD -->App : HAL_OK or HAL_INVALID_PARAM @enduml

Functions called:

  • HAL_PCD_Init()

  • HAL_PCD_SetConfig()

  • HAL_PCD_Start()

  • HAL_PCD_IRQHandler()

© Copyright 2025, STMicroelectronics.