mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
Replaced ASCII art drawings with blockdiag drawings
This commit is contained in:
krzychb
parent
8955db6d29
commit
713141e631
@ -73,25 +73,49 @@ as the default error-handling code in the application development phase. However
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ESP32 Wi-Fi Programming Model
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------------------------------
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The ESP32 Wi-Fi programming model is depicted as follows::
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The ESP32 Wi-Fi programming model is depicted as follows:
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.. blockdiag::
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:caption: Wi-Fi Programming Model
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:align: center
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blockdiag wifi-programming-model {
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# global attributes
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node_height = 60;
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node_width = 100;
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span_width = 100;
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span_height = 60;
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default_shape = roundedbox;
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default_group_color = none;
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# node labels
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TCP_STACK [label="TCP\n stack", fontsize=12];
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EVNT_TASK [label="Event\n task", fontsize=12];
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APPL_TASK [label="Application\n task", width = 120, fontsize=12];
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WIFI_DRV [label="Wi-Fi\n Driver", width = 120, fontsize=12];
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KNOT [shape=none];
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# node connections + labels
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TCP_STACK -> EVNT_TASK [label=event];
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EVNT_TASK -> APPL_TASK [label="callback\n or event"];
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# arrange nodes vertically
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group {
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label = "default handler";
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orientation = portrait;
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EVNT_TASK <- WIFI_DRV [label=event];
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}
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# intermediate node
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group {
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label = "user handler";
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orientation = portrait;
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APPL_TASK -- KNOT;
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}
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WIFI_DRV <- KNOT [label="API\n call"];
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}
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default handler user handler
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----------- ------------- -------------
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| | event | | callback or | |
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| TCPIP | ---------> | event | ----------> | application |
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| stack | | task | event | task |
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----------- ------------- -------------
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/|\ |
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| |
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event | |
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| |
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| |
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------------- |
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| | |
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| Wi-Fi Driver|/__________________|
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| |\ API call
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| |
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-------------
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The Wi-Fi driver can be considered a black box that knows nothing about high-layer code, such as the
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TCPIP stack, application task, event task, etc. All the Wi-Fi driver can do is receive API calls from the high layer,
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@ -211,78 +235,61 @@ Currently, the ESP32 implementation will never generate this event. It may be re
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ESP32 Wi-Fi Station General Scenario
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---------------------------------------
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Below is a "big scenario" which describes some small scenarios in Station mode::
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Below is a "big scenario" which describes some small scenarios in Station mode:
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.. seqdiag::
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:caption: Sample Wi-Fi Event Scenarios in Station Mode
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:align: center
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seqdiag sample-scenarios-station-mode {
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activation = none;
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node_width = 80;
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node_height = 60;
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edge_length = 140;
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span_height = 5;
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default_shape = roundedbox;
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default_fontsize = 12;
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MAIN_TASK [label = "Main\ntask"];
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APP_TASK [label = "App\ntask"];
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EVENT_TASK [label = "Event\ntask"];
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LWIP_TASK [label = "LwIP\ntask"];
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WIFI_TASK [label = "Wi-Fi\ntask"];
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=== 1. Init Phase ===
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MAIN_TASK -> LWIP_TASK [label="1.1> Create / init LwIP"];
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MAIN_TASK -> EVENT_TASK [label="1.2> Create / init event"];
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MAIN_TASK -> WIFI_TASK [label="1.3> Create / init Wi-Fi"];
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MAIN_TASK -> APP_TASK [label="1.4> Create app task"];
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=== 2. Configure Phase ===
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MAIN_TASK -> WIFI_TASK [label="2> Configure Wi-Fi"];
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=== 3. Start Phase ===
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MAIN_TASK -> WIFI_TASK [label="3.1> Start Wi-Fi"];
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EVENT_TASK <- WIFI_TASK [label="3.2> SYSTEM_EVENT_STA_START"];
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APP_TASK <- EVENT_TASK [label="3.3> SYSTEM_EVENT_STA_START"];
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=== 4. Connect Phase ===
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APP_TASK -> WIFI_TASK [label="4.1> Connect Wi-Fi"];
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EVENT_TASK <- WIFI_TASK [label="4.2> SYSTEM_EVENT_STA_CONNECTED"];
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APP_TASK <- EVENT_TASK [label="4.3> SYSTEM_EVENT_STA_CONNECTED"];
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=== 5. Got IP Phase ===
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EVENT_TASK -> LWIP_TASK [label="5.1> Start DHCP client"];
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EVENT_TASK <- LWIP_TASK [label="5.2> SYSTEM_EVENT_STA_GOT_IP"];
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APP_TASK <- EVENT_TASK [label="5.3> SYSTEM_EVENT_STA_GOT_IP"];
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APP_TASK -> APP_TASK [label="5.4> socket related init"];
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=== 6. Disconnect Phase ===
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EVENT_TASK <- WIFI_TASK [label="6.1> SYSTEM_EVENT_STA_DISCONNECTED"];
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APP_TASK <- EVENT_TASK [label="6.2> SYSTEM_EVENT_STA_DISCONNECTED"];
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APP_TASK -> APP_TASK [label="6.3> disconnect handling"];
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=== 7. IP Change Phase ===
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EVENT_TASK <- LWIP_TASK [label="7.1> SYSTEM_EVENT_STA_GOT_IP"];
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APP_TASK <- EVENT_TASK [label="7.2> SYSTEM_EVENT_STA_GOT_IP"];
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APP_TASK -> APP_TASK [label="7.3> Socket error handling"];
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=== 8. Deinit Phase ===
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APP_TASK -> WIFI_TASK [label="8.1> Disconnect Wi-Fi"];
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APP_TASK -> WIFI_TASK [label="8.2> Stop Wi-Fi"];
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APP_TASK -> WIFI_TASK [label="8.3> Deinit Wi-Fi"];
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}
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--------- --------- --------- --------- ---------
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| Main | | app | | Event | | LwIP | | Wi-Fi |
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| task | | task | | task | | task | | task |
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--------- --------- --------- --------- ---------
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| | | | | ---
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| 1.1> create/init LwIP | | | |
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|---------------------------------------------------------->| | |
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| 1.2> create/init event | | |
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|-------------------------------------->| | | 1. Init Phase
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| | 1.3> create/init Wi-Fi | |
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|----------------------------------------------------------------------------->| |
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| 1.4> create app task | | | |
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|------------------>| | | | |
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| | | | | ---
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| | | | | |
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| | | | |
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| | 2> configure Wi-Fi | | 2. Configure Phase
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|----------------------------------------------------------------------------->|
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| | | | | |
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| | | | | ---
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| | 3.1> start Wi-Fi | | |
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|----------------------------------------------------------------------------->|
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| | | 3.2 > SYSTEM_EVENT_STA_START | 3. Start Phase
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| | |<-------------------------------------|
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| 3.3> SYSTEM_EVENT_STA_START | | |
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| |<------------------| | | ---
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| | | | | |
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| | | | | |
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| | 4.1> connect wifi | | |
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| |--------------------------------------------------------->| 4. Connect Phase
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| | | 4.2> SYSTEM_EVENT_STA_CONNECTED | |
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| | |<-------------------------------------| |
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| 4.3> SYSTEM_EVENT_STA_CONNECTED | | |
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| |<------------------| | | ---
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| | | | | |
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| | | | | |
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| | 5.1> start DHCP client | | |
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| | |------------------>| | |
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| | 5.2> SYSTEM_EVENT_STA_GOT_IP | |
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| | |<------------------| |
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| 5.3> SYSTEM_EVENT_STA_GOT_IP | | 5. Got IP Phase
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| |<------------------| | |
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| |----- | | | |
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| | | 5.4> socket related init | | |
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| |<---- | | | |
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| | | | | ---
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| | | 6.1> SYSTEM_EVENT_STA_DISCONNECTED | |
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| | |<-------------------------------------|
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| 6.2> SYSTEM_EVENT_STA_DISCONNECTED | | 6. Disconnect Phase
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| |<------------------| | |
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| |----- | | | |
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| | | 6.3> disconnect handling | | |
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| |<---- | | | ---
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| | | | | |
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| | 7.1> SYSTEM_EVENT_STA_GOT_IP | |
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| | |<------------------| | |
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| 7.2> SYSTEM_EVENT_STA_GOT_IP | |
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| |<------------------| | | 7. IP change phase
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| |----- | | |
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| | | 7.3> socket error handling | | |
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| |<---- | | | |
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| | | | | ---
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| | 8.1> disconnect Wi-Fi | | |
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| |--------------------------------------------------------->|
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| | 8.2> stop Wi-Fi | | 8. Deinit phase
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| |--------------------------------------------------------->|
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| | 8.3> deinit Wi-Fi | | |
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| |--------------------------------------------------------->| |
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| | | | | ---
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1. Wi-Fi/LwIP Init Phase
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++++++++++++++++++++++++++++++
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@ -349,63 +356,51 @@ In step 4.2, the Wi-Fi connection may fail because, for example, the password is
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ESP32 Wi-Fi soft-AP General Scenario
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---------------------------------------------
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Below is a "big scenario" which describes some small scenarios in Soft-AP mode::
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Below is a "big scenario" which describes some small scenarios in Soft-AP mode:
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.. seqdiag::
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:caption: Sample Wi-Fi Event Scenarios in Soft-AP Mode
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:align: center
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seqdiag sample-scenarios-soft-ap-mode {
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activation = none;
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node_width = 80;
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node_height = 60;
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edge_length = 140;
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span_height = 5;
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default_shape = roundedbox;
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default_fontsize = 12;
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MAIN_TASK [label = "Main\ntask"];
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APP_TASK [label = "App\ntask"];
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EVENT_TASK [label = "Event\ntask"];
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LWIP_TASK [label = "LwIP\ntask"];
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WIFI_TASK [label = "Wi-Fi\ntask"];
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=== 1. Init Phase ===
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MAIN_TASK -> LWIP_TASK [label="1.1> Create / init LwIP"];
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MAIN_TASK -> EVENT_TASK [label="1.2> Create / init event"];
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MAIN_TASK -> WIFI_TASK [label="1.3> Create / init Wi-Fi"];
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MAIN_TASK -> APP_TASK [label="1.4> Create app task"];
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=== 2. Configure Phase ===
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MAIN_TASK -> WIFI_TASK [label="2> Configure Wi-Fi"];
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=== 3. Start Phase ===
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MAIN_TASK -> WIFI_TASK [label="3.1> Start Wi-Fi"];
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EVENT_TASK <- WIFI_TASK [label="3.2> SYSTEM_EVENT_AP_START"];
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APP_TASK <- EVENT_TASK [label="3.3> SYSTEM_EVENT_AP_START"];
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=== 4. Connect Phase ===
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EVENT_TASK <- WIFI_TASK [label="4.1> SYSTEM_EVENT_AP_STA_CONNECTED"];
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APP_TASK <- EVENT_TASK [label="4.2> SYSTEM_EVENT_AP_STA_CONNECTED"];
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=== 5. Disconnect Phase ===
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EVENT_TASK <- WIFI_TASK [label="5.1> SYSTEM_EVENT_STA_DISCONNECTED"];
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APP_TASK <- EVENT_TASK [label="5.2> SYSTEM_EVENT_STA_DISCONNECTED"];
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APP_TASK -> APP_TASK [label="5.3> disconnect handling"];
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=== 6. Deinit Phase ===
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APP_TASK -> WIFI_TASK [label="6.1> Disconnect Wi-Fi"];
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APP_TASK -> WIFI_TASK [label="6.2> Stop Wi-Fi"];
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APP_TASK -> WIFI_TASK [label="6.3> Deinit Wi-Fi"];
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}
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--------- --------- --------- --------- ---------
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| Main | | app | | Event | | LwIP | | Wi-Fi |
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| task | | task | | task | | task | | task |
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--------- --------- --------- --------- ---------
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| | | | |
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| | | | | ---
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| 1.1> create/init LwIP | | | |
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|---------------------------------------------------------->| | |
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| 1.2> create/init event | | |
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|-------------------------------------->| | | 1. Init Phase
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| | 1.3> create/init Wi-Fi | |
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|----------------------------------------------------------------------------->| |
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| 1.4> create app task | | | |
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|------------------>| | | | |
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| | | | | ---
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| | | | | |
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| | | | |
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| | 2> configure Wi-Fi | | 2. Configure Phase
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|----------------------------------------------------------------------------->|
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| | | | | |
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| | | | | ---
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| | | | | |
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| | 3.1> start Wi-Fi | |
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|----------------------------------------------------------------------------->| 3. Start Phase
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| | | 3.2 > SYSTEM_EVENT_AP_START |
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| | |<-------------------------------------| |
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| 3.3> SYSTEM_EVENT_AP_START | | |
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| |<------------------| | | ---
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| | | | | |
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| | | | |
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| | | 4.1> SYSTEM_EVENT_AP_STACONNECTED | 4. Connect Phase
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| | |<-------------------------------------|
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| 4.2> SYSTEM_EVENT_AP_STACONNECTED | | |
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| |<------------------| | | ---
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| | | | | |
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| | | | | |
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| | | 5.1> SYSTEM_EVENT_STA_DISCONNECTED |
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| | |<-------------------------------------| 5. Disconnect Phase
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| 5.2> SYSTEM_EVENT_STA_DISCONNECTED | |
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| |<------------------| | | |
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| |----- | | | |
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| | | 5.3> disconnect handling | | |
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| |<---- | | | ---
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| | | | | |
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| | | | | |
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| | | | | |
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| | 6.1> disconnect Wi-Fi | | |
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| |--------------------------------------------------------->|
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| | 6.2> stop Wi-Fi | | 6. Deinit phase
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| |--------------------------------------------------------->|
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| | 6.3> deinit Wi-Fi | | |
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| |--------------------------------------------------------->| |
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| | | | | ---
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| | | | |
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ESP32 Wi-Fi Scan
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------------------------
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@ -514,38 +509,34 @@ The scan type and other scan attributes are configured by esp_wifi_scan_start. T
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Scan All APs In All Channels(foreground)
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+++++++++++++++++++++++++++++++++++++++++++
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Scenario::
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Scenario:
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--------- --------- ---------
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| app | | event | | Wi-Fi |
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| task | | task | | task |
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--------- --------- ---------
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| | |
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| | |
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| 1.1> Configure country code |
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|-------------------------------------->|
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| 1.2> Scan configuration |
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|-------------------------------------->|
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| | |
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| | |
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| | |----
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| | | | 2.1> Scan channel 1
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| | |<---
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| | |----
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| | | | 2.2> Scan channel 2
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| | |<---
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| | |
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| | | .... ...
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| | |
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| | |----
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| | | | 2.x> Scan channel N
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| | |<---
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| | |
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| 3.1 SYSTEM_EVENT_SCAN_DONE |
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| |<------------------|
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| 3.2 SYSTEM_EVENT_SCAN_DONE |
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|<------------------| |
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| | |
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.. seqdiag::
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:caption: Foreground Scan of all Wi-Fi Channels
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:align: center
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seqdiag foreground-scan-all-channels {
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activation = none;
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node_width = 80;
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node_height = 60;
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edge_length = 160;
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span_height = 5;
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default_shape = roundedbox;
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default_fontsize = 12;
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APP_TASK [label = "App\ntask"];
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EVENT_TASK [label = "Event\ntask"];
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WIFI_TASK [label = "Wi-Fi\ntask"];
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APP_TASK -> WIFI_TASK [label="1.1 > Configure country code"];
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APP_TASK -> WIFI_TASK [label="1.2 > Scan configuration"];
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WIFI_TASK -> WIFI_TASK [label="2.1 > Scan channel 1"];
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WIFI_TASK -> WIFI_TASK [label="2.2 > Scan channel 2"];
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WIFI_TASK -> WIFI_TASK [label="..."];
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WIFI_TASK -> WIFI_TASK [label="2.x > Scan channel N"];
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EVENT_TASK <- WIFI_TASK [label="3.1 > SYSTEM_EVENT_SCAN_DONE"];
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APP_TASK <- EVENT_TASK [label="3.2 > SYSTEM_EVENT_SCAN_DONE"];
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}
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The scenario above describes an all-channel, foreground scan. The foreground scan can only occur in Station mode where the station does not connect to any AP. Whether it is a foreground or background scan is totally determined by the Wi-Fi driver, and cannot be configured by the application.
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@ -574,84 +565,70 @@ Scan-Done Event Handling Phase
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Scan All APs on All Channels(background)
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++++++++++++++++++++++++++++++++++++++++
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Scenario::
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Scenario:
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--------- --------- ---------
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| app | | event | | Wi-Fi |
|
||||
| task | | task | | task |
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--------- --------- ---------
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| | |
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| | |
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| 1.1> Configure country code |
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|-------------------------------------->|
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| 1.2> Scan configuration |
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|-------------------------------------->|
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| | |
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| | |
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| | |----
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| | | | 2.1> Scan channel 1
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| | |<---
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| | |----
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| | | | 2.2> Back to home channel H
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| | |<---
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| | |----
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| | | | 2.3> Scan channel 2
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| | |<---
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| | |----
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| | | | 2.4> Back to home channel H
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| | |<---
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| | |
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| | | .... ...
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| | |
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| | |----
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| | | | 2.x-1> Scan channel N
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| | |<---
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| | |----
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| | | | 2.x> Back to home channel H
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| | |<---
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| | |
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| 3.1 SYSTEM_EVENT_SCAN_DONE |
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| |<------------------|
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| 3.2 SYSTEM_EVENT_SCAN_DONE |
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|<------------------| |
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| | |
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.. seqdiag::
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:caption: Background Scan of all Wi-Fi Channels
|
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:align: center
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||||
|
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seqdiag background-scan-all-channels {
|
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activation = none;
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node_width = 80;
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node_height = 60;
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edge_length = 160;
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span_height = 5;
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default_shape = roundedbox;
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default_fontsize = 12;
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|
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APP_TASK [label = "App\ntask"];
|
||||
EVENT_TASK [label = "Event\ntask"];
|
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WIFI_TASK [label = "Wi-Fi\ntask"];
|
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|
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APP_TASK -> WIFI_TASK [label="1.1 > Configure country code"];
|
||||
APP_TASK -> WIFI_TASK [label="1.2 > Scan configuration"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.1 > Scan channel 1"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.2 > Back to home channel H"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.3 > Scan channel 2"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.4 > Back to home channel H"];
|
||||
WIFI_TASK -> WIFI_TASK [label="..."];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.x-1 > Scan channel N"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.x > Back to home channel H"];
|
||||
EVENT_TASK <- WIFI_TASK [label="3.1 > SYSTEM_EVENT_SCAN_DONE"];
|
||||
APP_TASK <- EVENT_TASK [label="3.2 > SYSTEM_EVENT_SCAN_DONE"];
|
||||
}
|
||||
|
||||
The scenario above is an all-channel background scan. Compared to `Scan All APs In All Channels(foreground)`_ , the difference in the all-channel background scan is that the Wi-Fi driver will scan the back-to-home channel for 30 ms before it switches to the next channel to give the Wi-Fi connection a chance to transmit/receive data.
|
||||
|
||||
Scan for a Specific AP in All Channels
|
||||
+++++++++++++++++++++++++++++++++++++++
|
||||
Scenario::
|
||||
Scenario:
|
||||
|
||||
--------- --------- ---------
|
||||
| app | | event | | Wi-Fi |
|
||||
| task | | task | | task |
|
||||
--------- --------- ---------
|
||||
| | |
|
||||
| | |
|
||||
| 1.1> Configure country code |
|
||||
|-------------------------------------->|
|
||||
| 1.2> Scan configuration |
|
||||
|-------------------------------------->|
|
||||
| | |
|
||||
| | |
|
||||
| | |----
|
||||
| | | | 2.1> Scan channel C1
|
||||
| | |<---
|
||||
| | |----
|
||||
| | | | 2.2> Scan channel C2
|
||||
| | |<---
|
||||
| | |
|
||||
| | | ...
|
||||
| | |
|
||||
| | |----
|
||||
| | | | 2.x> Scan channel CN, or the AP is found
|
||||
| | |<---
|
||||
| | |
|
||||
| 3.1 SYSTEM_EVENT_SCAN_DONE |
|
||||
| |<------------------|
|
||||
| 3.2 SYSTEM_EVENT_SCAN_DONE |
|
||||
|<------------------| |
|
||||
| | |
|
||||
.. seqdiag::
|
||||
:caption: Scan of specific Wi-Fi Channels
|
||||
:align: center
|
||||
|
||||
seqdiag scan-specific-channels {
|
||||
activation = none;
|
||||
node_width = 80;
|
||||
node_height = 60;
|
||||
edge_length = 160;
|
||||
span_height = 5;
|
||||
default_shape = roundedbox;
|
||||
default_fontsize = 12;
|
||||
|
||||
APP_TASK [label = "App\ntask"];
|
||||
EVENT_TASK [label = "Event\ntask"];
|
||||
WIFI_TASK [label = "Wi-Fi\ntask"];
|
||||
|
||||
APP_TASK -> WIFI_TASK [label="1.1 > Configure country code"];
|
||||
APP_TASK -> WIFI_TASK [label="1.2 > Scan configuration"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.1 > Scan channel C1"];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.2 > Scan channel C2"];
|
||||
WIFI_TASK -> WIFI_TASK [label="..."];
|
||||
WIFI_TASK -> WIFI_TASK [label="2.x > Scan channel CN, or the AP is found"];
|
||||
EVENT_TASK <- WIFI_TASK [label="3.1 > SYSTEM_EVENT_SCAN_DONE"];
|
||||
APP_TASK <- EVENT_TASK [label="3.2 > SYSTEM_EVENT_SCAN_DONE"];
|
||||
}
|
||||
|
||||
This scan is similar to `Scan All APs In All Channels(foreground)`_. The differences are:
|
||||
|
||||
@ -681,60 +658,50 @@ ESP32 Wi-Fi Station Connecting Scenario
|
||||
----------------------------------------
|
||||
Generally, the application does not need to care about the connecting process. Below is a brief introduction to the process for those who are really interested.
|
||||
|
||||
Scenario::
|
||||
Scenario:
|
||||
|
||||
.. seqdiag::
|
||||
:caption: Wi-Fi Station Connecting Process
|
||||
:align: center
|
||||
|
||||
seqdiag station-connecting-process {
|
||||
activation = none;
|
||||
node_width = 80;
|
||||
node_height = 60;
|
||||
edge_length = 160;
|
||||
span_height = 5;
|
||||
default_shape = roundedbox;
|
||||
default_fontsize = 12;
|
||||
|
||||
EVENT_TASK [label = "Event\ntask"];
|
||||
WIFI_TASK [label = "Wi-Fi\ntask"];
|
||||
AP [label = "AP"];
|
||||
|
||||
=== 1. Scan Phase ===
|
||||
WIFI_TASK -> WIFI_TASK [label="1.1 > Scan"];
|
||||
EVENT_TASK <- WIFI_TASK [label="1.2 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
=== 2. Auth Phase ===
|
||||
WIFI_TASK -> AP [label="2.1 > Auth request"];
|
||||
EVENT_TASK <- WIFI_TASK [label="2.2 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
WIFI_TASK <- AP [label="2.3 > Auth response"];
|
||||
EVENT_TASK <- WIFI_TASK [label="2.4 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
=== 3. Assoc Phase ===
|
||||
WIFI_TASK -> AP [label="3.1 > Assoc request"];
|
||||
EVENT_TASK <- WIFI_TASK [label="3.2 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
WIFI_TASK <- AP [label="3.3 > Assoc response"];
|
||||
EVENT_TASK <- WIFI_TASK [label="3.4 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
=== 4. 4-way Handshake Phase ===
|
||||
WIFI_TASK -> AP [label="4.1 > 1/4 EAPOL"];
|
||||
EVENT_TASK <- WIFI_TASK [label="4.2 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
WIFI_TASK -> AP [label="4.3 > 2/4 EAPOL"];
|
||||
EVENT_TASK <- WIFI_TASK [label="4.4 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
WIFI_TASK -> AP [label="4.5 > 3/4 EAPOL"];
|
||||
EVENT_TASK <- WIFI_TASK [label="4.6 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
WIFI_TASK -> AP [label="4.7 > 4/4 EAPOL"];
|
||||
EVENT_TASK <- WIFI_TASK [label="4.8 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
EVENT_TASK <- WIFI_TASK [label="4.9 > SYSTEM_EVENT_STA_DISCONNECTED"];
|
||||
}
|
||||
|
||||
--------- --------- ---------
|
||||
| Event | | Wi-Fi | | AP |
|
||||
| task | | task | | |
|
||||
--------- --------- ---------
|
||||
| | |
|
||||
| | | ---
|
||||
| |---- | |
|
||||
| | | 1.1> Scan |
|
||||
| |<--- | Scan phase
|
||||
| 1.2> SYSTEM_EVENT_STA_DISCONNECTED |
|
||||
|<------------------| | |
|
||||
| | | ---
|
||||
| | | |
|
||||
| 2.1> Auth Request | |
|
||||
| |------------------>| |
|
||||
| 2.2> SYSTEM_EVENT_STA_DISCONNECTED |
|
||||
|<------------------| | Auth phase
|
||||
| 2.3> Auth Response |
|
||||
| |<------------------| |
|
||||
| 2.4> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | ---
|
||||
| | | |
|
||||
| | 3.1 Assoc Request | |
|
||||
| |------------------>| |
|
||||
| 3.2> SYSTEM_EVENT_STA_DISCONNECTED |
|
||||
|<------------------| | Assoc phase
|
||||
| 3.3 Assoc Response |
|
||||
| |<------------------| |
|
||||
| 3.4> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | |
|
||||
| | | ---
|
||||
| | | |
|
||||
| | 4.1> 1/4 EAPOL | |
|
||||
| |<------------------| |
|
||||
| 4.2> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | |
|
||||
| | 4.3> 2/4 EAPOL | |
|
||||
| |------------------>| |
|
||||
| 4.4> SYSTEM_EVENT_STA_DISCONNECTED |
|
||||
|<------------------| | 4-way handshake phase
|
||||
| | 4.5> 3/4 EAPOL |
|
||||
| |<------------------| |
|
||||
| 4.6> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | |
|
||||
| | 4.7> 4/4 EAPOL | |
|
||||
| |------------------>| |
|
||||
| 4.8> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | |
|
||||
| | | |
|
||||
| 4.9> SYSTEM_EVENT_STA_DISCONNECTED | |
|
||||
|<------------------| | ---
|
||||
| | |
|
||||
|
||||
Scan Phase
|
||||
+++++++++++++++++++++
|
||||
@ -1598,26 +1565,73 @@ Wi-Fi Menuconfig
|
||||
Wi-Fi Buffer Configure
|
||||
+++++++++++++++++++++++
|
||||
|
||||
If you are going to modify the default number or type of buffer, it would be helpful to also have an overview of how the buffer is allocated/freed in the data path. The following diagram shows this process in the TX direction::
|
||||
If you are going to modify the default number or type of buffer, it would be helpful to also have an overview of how the buffer is allocated/freed in the data path. The following diagram shows this process in the TX direction:
|
||||
|
||||
.. blockdiag::
|
||||
:caption: TX Buffer Allocation
|
||||
:align: center
|
||||
|
||||
blockdiag buffer_allocation_tx {
|
||||
|
||||
# global attributes
|
||||
node_height = 60;
|
||||
node_width = 100;
|
||||
span_width = 50;
|
||||
span_height = 20;
|
||||
default_shape = roundedbox;
|
||||
|
||||
# labels of diagram nodes
|
||||
APPL_TASK [label="Application\n task", fontsize=12];
|
||||
LWIP_TASK [label="LwIP\n task", fontsize=12];
|
||||
WIFI_TASK [label="Wi-Fi\n task", fontsize=12];
|
||||
|
||||
# labels of description nodes
|
||||
APPL_DESC [label="1> User data", width=120, height=25, shape=note, color=yellow];
|
||||
LWIP_DESC [label="2> Pbuf", width=120, height=25, shape=note, color=yellow];
|
||||
WIFI_DESC [label="3> Dynamic (Static)\n TX Buffer", width=150, height=40, shape=note, color=yellow];
|
||||
|
||||
# node connections
|
||||
APPL_TASK -> LWIP_TASK -> WIFI_TASK
|
||||
APPL_DESC -> LWIP_DESC -> WIFI_DESC [style=none]
|
||||
}
|
||||
|
||||
------------- ------------- -------------
|
||||
| Application | | LwIP | | Wi-Fi |
|
||||
| task | ---------> | task | ---------> | task |
|
||||
------------- ------------- -------------
|
||||
1> User data 2> Pbuf 3> Dynamic (Static) TX Buffer
|
||||
|
||||
Description:
|
||||
- The application allocates the data which needs to be sent out.
|
||||
- The application calls TCPIP-/Socket-related APIs to send the user data. These APIs will allocate a PBUF used in LwIP, and make a copy of the user data.
|
||||
- When LwIP calls a Wi-Fi API to send the PBUF, the Wi-Fi API will allocate a "Dynamic Tx Buffer" or "Static Tx Buffer", make a copy of the LwIP PBUF, and finally send the data.
|
||||
|
||||
The following diagram shows how buffer is allocated/freed in the RX direction::
|
||||
The following diagram shows how buffer is allocated/freed in the RX direction:
|
||||
|
||||
------------- ------------- ------------- -------------
|
||||
| Application | | LwIP | | Wi-Fi | | Wi-Fi |
|
||||
| Task | <--------- | task | <--------- | task | <--------- | Interrupt |
|
||||
------------- ------------- ------------- -------------
|
||||
4> User data 3> Pbuf 2> Dynamic RX Buffer 1> Static RX Buffer
|
||||
.. blockdiag::
|
||||
:caption: RX Buffer Allocation
|
||||
:align: center
|
||||
|
||||
blockdiag buffer_allocation_rx {
|
||||
|
||||
# global attributes
|
||||
node_height = 60;
|
||||
node_width = 100;
|
||||
span_width = 40;
|
||||
span_height = 20;
|
||||
default_shape = roundedbox;
|
||||
|
||||
# labels of diagram nodes
|
||||
APPL_TASK [label="Application\n task", fontsize=12];
|
||||
LWIP_TASK [label="LwIP\n task", fontsize=12];
|
||||
WIFI_TASK [label="Wi-Fi\n task", fontsize=12];
|
||||
WIFI_INTR [label="Wi-Fi\n interrupt", fontsize=12];
|
||||
|
||||
# labels of description nodes
|
||||
APPL_DESC [label="4> User\n Data Buffer", height=40, shape=note, color=yellow];
|
||||
LWIP_DESC [label="3> Pbuf", height=40, shape=note, color=yellow];
|
||||
WIFI_DESC [label="2> Dynamic\n RX Buffer", height=40, shape=note, color=yellow];
|
||||
INTR_DESC [label="1> Static\n RX Buffer", height=40, shape=note, color=yellow];
|
||||
|
||||
# node connections
|
||||
APPL_TASK <- LWIP_TASK <- WIFI_TASK <- WIFI_INTR
|
||||
APPL_DESC <- LWIP_DESC <- WIFI_DESC <- INTR_DESC [style=none]
|
||||
}
|
||||
|
||||
Description:
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user