Communication Protocols for System Integration
Mailbox Communication
Interprocessor communication
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Mailbox
3
The Mailbox provides the following features:
interface that implements the BLE communication protocol on top of IPCC
supports only packets that are compliant to the HCI format
Supports Command/Event flow control
used by the HCI Transport Layer in all applications
Direct access with the Transparent mode application – HCI Format provided by
PC GUI
System IPCC Communication
•
Supports all system communication related to system, memory and trace for both the BLE
protocol and the Thread protocol.
•
IPCC channels are used to communicate system and memory information between the two
processors
•
IPCC channel 2 (System)
•
commands send by application to the radio stack
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response and events send by radio stack to application
•
IPCC channel 4 (Shared memory management)
•
buffer release notification send by application to the radio stack
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IPCC channel 4 (Traces) (Internal ST feature only)
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trace events send by radio stack to application
4
BLE IPCC Communication
•
Supports all communication related to the BLE protocol.
•
Different IPCC channels are used to communicate BLE information between the two
processors
•
IPCC channel 1 (BLE)
•
command send by application to the radio stack
•
events and ACL data packet send by radio stack to the application
•
IPCC channel 6 (BLE-HCI)
•
ACL data packet send by application to the radio stack
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ACL data packet acknowledgment send by radio stack to the application
5
SRAM2a table details
User Option
IPCCDBA
SRAM2a table
Device Info table
BLE table
Thread table
System table
Memory Manager table
Traces table
Shared IPCC buffers
•
IPCC buffers are to be allocated by the application in SRAM2a using the following table
structure:
6
This component provides several virtual timers to any user. It is based on the wakeup timer in the RTC IP and can be running in low power mode.
It is available only on CPU1.
This technical document explores various communication protocols used for system integration, focusing on mailbox communication, interprocessor communication, system communication using IPCC, and BLE communication utilizing different IPCC channels. The document delves into the features, functions, and procedures associated with each communication protocol, highlighting their importance in facilitating seamless data exchange between different components of a system.
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Presentation Transcript
Interprocessor communication 2 ARM CM4F Transport Layer (TL) IPCC SRAM2 ARM CM0+ Initialize TL (TL_BLE_Init function)
Mailbox 3 The Mailbox provides the following features: interface that implements the BLE communication protocol on top of IPCC supports only packets that are compliant to the HCI format Supports Command/Event flow control used by the HCI Transport Layer in all applications Direct access with the Transparent mode application HCI Format provided by PC GUI Function Description Initialize the BLE mapping void TL_BLE_Init ( ( initmode = cold/start used when standby is supported on the CPU2) TL_BLE_InitMode_t initmode, TL_CmdPacket_t * cmdbuffer, uint8_t *evtpool, uint32_t evtpoolsize); Send the command buffer Release an user event void TL_BLE_SendCmd (void); void TL_BLE_EvtDone (TL_EvtPacket_t * phcievt); void TL_BLE_EvtReceived (TL_EvtPacket_t * hcievt); Report an event received from the BLE controller (interrupt context)
System IPCC Communication 4 Supports all system communication related to system, memory and trace for both the BLE protocol and the Thread protocol. IPCC channels are used to communicate system and memory information between the two processors IPCC channel 2 (System) commands send by application to the radio stack response and events send by radio stack to application IPCC channel 4 (Shared memory management) buffer release notification send by application to the radio stack IPCC channel 4 (Traces) (Internal ST feature only) trace events send by radio stack to application
BLE IPCC Communication 5 Supports all communication related to the BLE protocol. Different IPCC channels are used to communicate BLE information between the two processors IPCC channel 1 (BLE) command send by application to the radio stack events and ACL data packet send by radio stack to the application IPCC channel 6 (BLE-HCI) ACL data packet send by application to the radio stack ACL data packet acknowledgment send by radio stack to the application
Shared IPCC buffers 6 IPCC buffers are to be allocated by the application in SRAM2a using the following table structure: SRAM2a table details System event queue System Cmd/Rsp Traces event queue SRAM2a table Thread Not/Ack Traces table Traces Event pool size Thread CLI Cmd/Not/Ack Memory Manager table Traces Event pool Thread Ot Cmd/Rsp System table System Event queue BLE HCL ACL data Thread table System Event pool size User Option BLE Event queue BLE table System Event pool IPCCDBA BLE CS Device Info table Spare system buffer BLE Cmd spare BLE buffer Device info
