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examples: using xEventGroup bits properly

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Closes IDF-1177

* changed
  ../../wifi/getting_started/station/README.md
  ../../wifi/getting_started/station/main/station_example_main.c
This commit is contained in:
Jakob Hasse 2020-01-02 18:53:49 +08:00
parent 16e102199a
commit 509ac2cfc1
3 changed files with 146 additions and 77 deletions
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46
examples/protocols/esp_local_ctrl/main/app_main.c
View file

@ -32,9 +32,11 @@
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about one event
* - are we connected to the AP with an IP? */
const int WIFI_CONNECTED_BIT = BIT0;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static const char *TAG = "local_ctrl_example";
@ -48,9 +50,10 @@ static void event_handler(void* arg, esp_event_base_t event_base,
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
xEventGroupClearBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
@ -62,8 +65,9 @@ static void event_handler(void* arg, esp_event_base_t event_base,
}
}
void wifi_init_sta()
esp_err_t wifi_init_sta(void)
{
esp_err_t ret_value = ESP_OK;
s_wifi_event_group = xEventGroupCreate();
tcpip_adapter_init();
@ -87,8 +91,33 @@ void wifi_init_sta()
ESP_ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "wifi_init_sta finished.");
ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
ret_value = ESP_FAIL;
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
ret_value = ESP_ERR_INVALID_STATE;
}
ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler));
ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler));
vEventGroupDelete(s_wifi_event_group);
return ret_value;
}
/* Function responsible for configuring and starting the esp_local_ctrl service.
@ -106,6 +135,9 @@ void app_main()
ESP_ERROR_CHECK(ret);
ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
wifi_init_sta();
if (wifi_init_sta() == ESP_OK) {
start_esp_local_ctrl_service();
} else {
ESP_LOGI(TAG, "Connection failed, not starting esp_local_ctrl service");
}
}

132
examples/wifi/getting_started/station/README.md
View file

@ -28,70 +28,82 @@ idf.py -p PORT flash monitor
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
## Example Output
Note that the output, in particular the order of the output, may vary depending on the environment.
There is the console output for station connects to ap successfully:
Console output if station connects to AP successfully:
```
I (727) wifi station: ESP_WIFI_MODE_STA
I (727) wifi: wifi driver task: 3ffc0c68, prio:23, stack:3584, core=0
I (727) wifi: wifi firmware version: 19b3110
I (727) wifi: config NVS flash: enabled
I (727) wifi: config nano formating: disabled
I (737) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (747) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (777) wifi: Init dynamic tx buffer num: 32
I (777) wifi: Init data frame dynamic rx buffer num: 32
I (777) wifi: Init management frame dynamic rx buffer num: 32
I (777) wifi: Init static rx buffer size: 1600
I (787) wifi: Init static rx buffer num: 10
I (787) wifi: Init dynamic rx buffer num: 32
I (907) phy: phy_version: 3960, 5211945, Jul 18 2018, 10:40:07, 0, 0
I (907) wifi: mode : sta (30:ae:a4:80:45:68)
I (907) wifi station: wifi_init_sta finished.
I (907) wifi station: connect to ap SSID:myssid password:mypassword
I (1027) wifi: n:6 0, o:1 0, ap:255 255, sta:6 0, prof:1
I (2017) wifi: state: init -> auth (b0)
I (2017) wifi: state: auth -> assoc (0)
I (2027) wifi: state: assoc -> run (10)
I (2067) wifi: connected with myssid, channel 6
I (2067) wifi: pm start, type: 1
I (589) wifi station: ESP_WIFI_MODE_STA
I (599) wifi: wifi driver task: 3ffc08b4, prio:23, stack:3584, core=0
I (599) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (599) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (629) wifi: wifi firmware version: 2d94f02
I (629) wifi: config NVS flash: enabled
I (629) wifi: config nano formating: disabled
I (629) wifi: Init dynamic tx buffer num: 32
I (629) wifi: Init data frame dynamic rx buffer num: 32
I (639) wifi: Init management frame dynamic rx buffer num: 32
I (639) wifi: Init management short buffer num: 32
I (649) wifi: Init static rx buffer size: 1600
I (649) wifi: Init static rx buffer num: 10
I (659) wifi: Init dynamic rx buffer num: 32
I (759) phy: phy_version: 4180, cb3948e, Sep 12 2019, 16:39:13, 0, 0
I (769) wifi: mode : sta (30:ae:a4:d9:bc:c4)
I (769) wifi station: wifi_init_sta finished.
I (889) wifi: new:<6,0>, old:<1,0>, ap:<255,255>, sta:<6,0>, prof:1
I (889) wifi: state: init -> auth (b0)
I (899) wifi: state: auth -> assoc (0)
I (909) wifi: state: assoc -> run (10)
I (939) wifi: connected with #!/bin/test, aid = 1, channel 6, BW20, bssid = ac:9e:17:7e:31:40
I (939) wifi: security type: 3, phy: bgn, rssi: -68
I (949) wifi: pm start, type: 1
I (3227) event: sta ip: 172.20.10.7, mask: 255.255.255.240, gw: 172.20.10.1
I (3227) wifi station: got ip:172.20.10.7
I (1029) wifi: AP's beacon interval = 102400 us, DTIM period = 3
I (2089) esp_netif_handlers: sta ip: 192.168.77.89, mask: 255.255.255.0, gw: 192.168.77.1
I (2089) wifi station: got ip:192.168.77.89
I (2089) wifi station: connected to ap SSID:myssid password:mypassword
```
There is the console output for station connects to ap failed:
Console output if the station failed to connect to AP:
```
I (728) wifi station: ESP_WIFI_MODE_STA
I (728) wifi: wifi driver task: 3ffc0c68, prio:23, stack:3584, core=0
I (728) wifi: wifi firmware version: 19b3110
I (728) wifi: config NVS flash: enabled
I (738) wifi: config nano formating: disabled
I (738) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (748) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (778) wifi: Init dynamic tx buffer num: 32
I (778) wifi: Init data frame dynamic rx buffer num: 32
I (778) wifi: Init management frame dynamic rx buffer num: 32
I (788) wifi: Init static rx buffer size: 1600
I (788) wifi: Init static rx buffer num: 10
I (788) wifi: Init dynamic rx buffer num: 32
I (908) phy: phy_version: 3960, 5211945, Jul 18 2018, 10:40:07, 0, 0
I (908) wifi: mode : sta (30:ae:a4:80:45:68)
I (908) wifi station: wifi_init_sta finished.
I (918) wifi station: connect to ap SSID:myssid password:mypassword
I (3328) wifi station: retry to connect to the AP
I (3328) wifi station: connect to the AP fail
I (5738) wifi station: retry to connect to the AP
I (5738) wifi station: connect to the AP fail
I (8148) wifi station: retry to connect to the AP
I (8148) wifi station: connect to the AP fail
I (10558) wifi station: retry to connect to the AP
I (10558) wifi station: connect to the AP fail
I (12968) wifi station: retry to connect to the AP
I (12968) wifi station: connect to the AP fail
I (15378) wifi station: connect to the AP fail
I (589) wifi station: ESP_WIFI_MODE_STA
I (599) wifi: wifi driver task: 3ffc08b4, prio:23, stack:3584, core=0
I (599) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (599) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (629) wifi: wifi firmware version: 2d94f02
I (629) wifi: config NVS flash: enabled
I (629) wifi: config nano formating: disabled
I (629) wifi: Init dynamic tx buffer num: 32
I (629) wifi: Init data frame dynamic rx buffer num: 32
I (639) wifi: Init management frame dynamic rx buffer num: 32
I (639) wifi: Init management short buffer num: 32
I (649) wifi: Init static rx buffer size: 1600
I (649) wifi: Init static rx buffer num: 10
I (659) wifi: Init dynamic rx buffer num: 32
I (759) phy: phy_version: 4180, cb3948e, Sep 12 2019, 16:39:13, 0, 0
I (759) wifi: mode : sta (30:ae:a4:d9:bc:c4)
I (769) wifi station: wifi_init_sta finished.
I (889) wifi: new:<6,0>, old:<1,0>, ap:<255,255>, sta:<6,0>, prof:1
I (889) wifi: state: init -> auth (b0)
I (1889) wifi: state: auth -> init (200)
I (1889) wifi: new:<6,0>, old:<6,0>, ap:<255,255>, sta:<6,0>, prof:1
I (1889) wifi station: retry to connect to the AP
I (1899) wifi station: connect to the AP fail
I (3949) wifi station: retry to connect to the AP
I (3949) wifi station: connect to the AP fail
I (4069) wifi: new:<6,0>, old:<6,0>, ap:<255,255>, sta:<6,0>, prof:1
I (4069) wifi: state: init -> auth (b0)
I (5069) wifi: state: auth -> init (200)
I (5069) wifi: new:<6,0>, old:<6,0>, ap:<255,255>, sta:<6,0>, prof:1
I (5069) wifi station: retry to connect to the AP
I (5069) wifi station: connect to the AP fail
I (7129) wifi station: retry to connect to the AP
I (7129) wifi station: connect to the AP fail
I (7249) wifi: new:<6,0>, old:<6,0>, ap:<255,255>, sta:<6,0>, prof:1
I (7249) wifi: state: init -> auth (b0)
I (8249) wifi: state: auth -> init (200)
I (8249) wifi: new:<6,0>, old:<6,0>, ap:<255,255>, sta:<6,0>, prof:1
I (8249) wifi station: retry to connect to the AP
I (8249) wifi station: connect to the AP fail
I (10299) wifi station: connect to the AP fail
I (10299) wifi station: Failed to connect to SSID:myssid, password:mypassword
```

35
examples/wifi/getting_started/station/main/station_example_main.c
View file

@ -31,9 +31,11 @@
/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;
/* The event group allows multiple bits for each event, but we only care about one event
* - are we connected to the AP with an IP? */
const int WIFI_CONNECTED_BIT = BIT0;
/* The event group allows multiple bits for each event, but we only care about two events:
* - we are connected to the AP with an IP
* - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1
static const char *TAG = "wifi station";
@ -47,9 +49,10 @@ static void event_handler(void* arg, esp_event_base_t event_base,
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
xEventGroupClearBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG,"connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
@ -86,8 +89,30 @@ void wifi_init_sta()
ESP_ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "wifi_init_sta finished.");
ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler));
ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler));
vEventGroupDelete(s_wifi_event_group);
}
void app_main()