HAL I2C Use Cases ¶

Prerequisite ¶

@startuml
==Prerequisite==

participant App as "User application"
participant "HAL GENERIC" as GENERIC
participant "HAL RCC" as RCC

App -> GENERIC : HAL_Init
GENERIC --> App
App -> RCC : Configure system clock
RCC --> App
@enduml

Full I2C Initialization Sequence ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C participant "HAL CORTEX\n(NVIC)" as CORTEX participant "HAL DMA" as DMA participant "HAL RCC" as RCC participant "HAL GPIO" as GPIO ==I2C HAL Initialization == App -> I2C : HAL_I2C_Init alt#grey #lightgrey If USE_HAL_I2C_CLK_ENABLE_MODEL > HAL_CLK_ENABLE_NO I2C->RCC : Enable the I2C clock RCC-->I2C end App <-- I2C : HAL_OK ==I2C System Initialization== Note over I2C : I2C System initialization can be called before\nI2C HAL initialization alt#grey #lightgrey If USE_HAL_I2C_DMA == 1 App->DMA : Initialization of DMA DMA-->App App->I2C : HAL_I2C_SetTxDMA / HAL_I2C_SetRxDMA DMA-->App end alt#grey #lightgrey If Interrupt needed App->CORTEX : Enable needed Interrupt CORTEX-->App end alt#grey #lightgrey If GPIO(s) needed App->GPIO : Initialization of GPIOs GPIO-->App end alt#grey #lightgrey If USE_HAL_I2C_CLK_ENABLE_MODEL == HAL_CLK_ENABLE_NO App->RCC : Enable the I2C clock RCC --> App end ==I2C Configuration== App -> I2C : HAL_I2C_SetConfig App <-- I2C :HAL_OK note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. ==Advanced I2C Configuration== App -> I2C : HAL_I2C_EnableAnalogFilter App <-- I2C :HAL_OK App -> I2C : HAL_I2C_SetConfigXXX App <-- I2C :HAL_OK App -> I2C : HAL_I2C_EnableXXX App <-- I2C :HAL_OK @enduml$

Called functions:

Full I2C Deinitialization Sequence ¶

Called functions:

HAL_I2C_DeInit()

Process Polling ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Master Transmit Polling== App -> I2C : HAL_I2C_MASTER_Transmit(...,uint32_t timeout_ms) alt successful case App <-- I2C : HAL_OK else invalid param App <-- I2C : HAL_INVALID_PARAM else busy App <-- I2C : HAL_BUSY note over App : Another Process is running...\nPlease wait and retry. else timeout App <-- I2C : HAL_TIMEOUT else error case App <-- I2C : HAL_ERROR App -> I2C : \ alt#grey #lightgrey If USE_HAL_I2C_GET_LAST_ERRORS == 1 App->I2C : HAL_I2C_GetLastErrors() App <-- I2C : \ (HAL_I2C_ERROR_XXX | HAL_I2C_ERROR_YYY) end end note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Process Master Transmit IT ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Master Transmit IT== App -> I2C : HAL_I2C_MASTER_Transmit_IT(handle, addr, &buffer,\n size_in_byte = N) App <-- I2C : HAL_OK ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt TXIS, Byte 1 ... Byte N I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Master_ISR() alt if (size-- != 0) note over I2C : buffer++;\nTXDR = buffer[0]; end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt STOP "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag STOP App <- I2C : HAL_I2C_MASTER_TxCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Process Slave Transmit IT ¶

$@startuml ==Process : Slave Transmit IT== participant App as "User application" participant "HAL I2C" as I2C App -> I2C : HAL_I2C_SLAVE_Transmit_IT(handle, addr, &buffer,\n size_in_byte = N) App <-- I2C : HAL_OK ... "I2Cx_IRQHandler" <- : I2Cx interrupt ADDR "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag ADDR "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt TXIS, Byte 1 ... Byte N I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() alt if (size-- != 0) note over I2C : buffer++;\nTXDR = buffer[0]; end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt STOP "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag STOP App <- I2C : HAL_I2C_SLAVE_TxCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Slave Receive IT ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Slave Receive IT== App -> I2C : HAL_I2C_SLAVE_Receive_IT(handle, addr, &buffer,\n size_in_byte = N) App <-- I2C : HAL_OK ... "I2Cx_IRQHandler" <- : I2Cx interrupt ADDR "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag ADDR "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt RXNE\nByte 1 ... Byte N I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() alt if (size-- != 0) note over I2C : buffer++;\nbuffer[0] = RXDR; end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt STOP "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag STOP App <- I2C : HAL_I2C_SLAVE_RxCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Master Mode IT ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Master Mode. Send CMD M bytes + Receive N bytes == App -> I2C : HAL_I2C_MASTER_SEQ_Transmit_IT(handle, addr, &buffer,\n size_in_byte = M, I2C_FIRST_FRAME) App <-- I2C : HAL_OK ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt TXIS\nCMD Byte 1 ... CMD Byte M I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Master_ISR() alt if (size-- != 0) note over I2C : buffer++;\nTXDR = buffer[0]; else else App <- I2C : HAL_I2C_MASTER_TxCpltCallback App --> I2C end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... App -> I2C : HAL_I2C_MASTER_SEQ_Receive_IT(handle, addr, &buffer,\n size_in_byte = N bytes, I2C_LAST_FRAME) App <-- I2C : HAL_OK ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt RXNE\nByte 1 ... Byte N I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Master_ISR() alt if (size-- != 0) note over I2C : buffer++;\nbuffer[0] = RXDR; end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt STOP "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag STOP App <- I2C : HAL_I2C_MASTER_RxCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Slave Mode IT ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Slave Mode. Receive CMD M bytes + Send N bytes == App -> I2C : HAL_I2C_SLAVE_EnableListen_IT(handle) note over I2C : Enable ADDRI, STOPI, NACKI, ERRI App <-- I2C : HAL_OK ... "I2Cx_IRQHandler" <- : I2Cx interrupt ADDR, DIR=Wr "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() App <- I2C : HAL_I2C_SLAVE_AddrCallback(handle,\nDirection=Write, Addr Match code) App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> ... App -> I2C : HAL_I2C_SLAVE_SEQ_Receive_IT(handle, addr, &buffer,\n size_in_byte = M, I2C_FIRST_FRAME) App <-- I2C : HAL_OK ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt RXNE, CMD Byte 1 ... CMD Byte M I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() alt if (size-- != 0) note over I2C : buffer++;\nbuffer[0] = RXDR; else else App <- I2C : HAL_I2C_SLAVE_RxCpltCallback App --> I2C end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt ADDR, DIR=Rd "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() App <- I2C : HAL_I2C_SLAVE_AddrCallback(handle,\nDirection=Read, Addr Match Code) App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> ... App -> I2C : HAL_I2C_SLAVE_SEQ_Transmit_IT(handle, addr, &buffer,\n size_in_byte = N, I2C_LAST_FRAME) App <-- I2C : HAL_OK ... loop while (size-- != 0) "I2Cx_IRQHandler" <- : I2Cx interrupt TXIS, Byte 1 ... Byte N I2C <- "I2Cx_IRQHandler" : HAL_I2C_EV_IRQHandler note over I2C : I2C_Slave_ISR() alt if (size-- != 0) note over I2C : buffer++;\nTXDR = buffer[0]; else else App <- I2C : HAL_I2C_SLAVE_TxCpltCallback App --> I2C end I2C --> "I2Cx_IRQHandler" "I2Cx_IRQHandler" --> end ... "I2Cx_IRQHandler" <- : I2Cx interrupt STOP "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler note over I2C : Clear Flag STOP App <- I2C : HAL_I2C_SLAVE_ListenCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Process DMA ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process : Master Transmit DMA== participant App participant I2C participant "I2Cx_IRQHandler" participant "HAL DMA driver" participant "DMAx_IRQHandler" App -> I2C : HAL_I2C_MASTER_Transmit_DMA I2C-> "HAL DMA driver" : HAL_DMA_Start_IT "HAL DMA driver" --> I2C : HAL_OK App <-- I2C : HAL_OK "DMAx_IRQHandler" <- : DMAx complete interrupt "DMAx_IRQHandler" -> "HAL DMA driver" : HAL_DMA_IRQHandler "HAL DMA driver" -> I2C : XferCpltCallback "HAL DMA driver" <-- I2C "DMAx_IRQHandler" <-- "HAL DMA driver" "DMAx_IRQHandler" --> "I2Cx_IRQHandler" <- : I2Cx Stop complete interrupt "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler I2C-> App : HAL_I2C_MASTER_TxCpltCallback I2C<-- App "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Process Abort IT ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process abort : Master Transmit asynchrone (IT)\n== App -> I2C : HAL_I2C_MASTER_Transmit_IT App <-- I2C : HAL_OK ... App -> I2C : HAL_I2C_MASTER_Abort_IT App <-- I2C : HAL_OK ... "I2Cx_IRQHandler" <- : I2Cx Stop complete interrupt "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler App <- I2C : HAL_I2C_AbortCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Process Abort DMA ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process abort : Master Transmit asynchrone (DMA)\n== App -> I2C : HAL_I2C_MASTER_Transmit_DMA App <-- I2C : HAL_OK ... App -> I2C : HAL_I2C_MASTER_Abort_IT I2C -> "HAL DMA driver" : HAL_DMA_Abort_IT I2C <-- "HAL DMA driver" : HAL_OK App <-- I2C : HAL_OK ... "DMAx_IRQHandler" <- : DMAx interrupt I2C <- "DMAx_IRQHandler" : I2C_DMAAbort I2C --> "DMAx_IRQHandler" "DMAx_IRQHandler" --> ... "I2Cx_IRQHandler" <- : I2Cx Stop complete interrupt "I2Cx_IRQHandler" -> I2C : HAL_I2C_EV_IRQHandler App <- I2C : HAL_I2C_AbortCpltCallback App --> I2C "I2Cx_IRQHandler" <-- I2C "I2Cx_IRQHandler" --> note over App : Driver state is IDLE,\nUser can start any process or execute any configuration. @enduml$

Called functions:

Recoverable Blocking Error ¶

$@startuml participant App as "User application" participant "HAL I2C" as I2C ==Process recoverable blocking error : Master Transmit asynchrone (IT or DMA)\n == App -> I2C : HAL_I2C_MASTER_Transmit_IT/DMA App <-- I2C : HAL_OK ... I2C <- : I2Cx or DMAx recoverable error interrupt App <-[#Orange] I2C :\ <color #Orange> HAL_I2C_ErrorCallback(&hi2c) </color> alt#grey #lightgrey If USE_HAL_I2C_GET_LAST_ERRORS == 1 App->I2C : HAL_I2C_GetLastErrorCodes() App <-- I2C : \ (HAL_I2C_ERROR_XXX | HAL_I2C_ERROR_YYY) end App [#Orange]--> I2C I2C --> note over App : Driver state is IDLE,\nUser can start any process or execute\n any configuration. @enduml$

Called functions:

Acquire/Release ¶

$@startuml participant "User 1" participant "User 2" participant "HAL I2C" as I2C participant "HAL OS wrapper" "User 1"-[#green]>I2C : <color #green>HAL_I2C_AcquireBus</color> I2C-[#green]>"HAL OS wrapper" :<color #green>HAL_OS_SemaphoreTake</color> I2C <-[#green]- "HAL OS wrapper" "User 1" <-[#green]- I2C : <color #green>HAL_OK</color> note over I2C : Bus acquired by user 1. Any Process can be executed.\nFor instance : Master Transmit Polling "User 2"-[#red]>I2C : <color #red>HAL_I2C_AcquireBus</color> I2C-[#red]>"HAL OS wrapper" :<color #red>HAL_OS_SemaphoreTake</color> "User 1"-[#green]>I2C : <color #green>HAL_I2C_ReleaseBus</color> "User 1" <-[#green]- I2C : <color #green>HAL_OK</color> I2C <-[#red]- "HAL OS wrapper" "User 2" <-[#red]- I2C : <color #red>HAL_OK</color> note over I2C : Bus acquired by user 2. Any Process can be executed.\nFor instance : Master Transmit Polling @enduml$

Called functions: