kopia lustrzana https://github.com/raspberrypi/pico-playground
Merge b65568972d into 49a701a955
Jack Whitham
GitHub
commit
e4afeb40e1
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@ -40,3 +40,4 @@ add_subdirectory(reset)
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add_subdirectory(scanvideo)
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add_subdirectory(sleep)
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add_subdirectory(stdio)
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add_subdirectory(wifi_settings_connect)
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@ -68,3 +68,11 @@ even though it is in the Pico SDK
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Name|Description
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---|---
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[stdio_pio](stdio/pio)| Demonstrates adding a custom STDIO driver using a PIO UART
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## WiFi
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Example using the wifi\_settings\_connect library from pico\_extras.
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Name|Description
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---|---
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[wifi\_settings\_connect\_example](wifi_settings_connect/example)| Demonstrates connecting to WiFi hotspots and sending UDP broadcasts
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@ -0,0 +1 @@
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add_subdirectory(example)
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@ -0,0 +1,40 @@
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#
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# Copyright (c) 2025 Jack Whitham
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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# Example for wifi_settings_connect.
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#
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# This example connects to WiFi using wifi_settings_connect functions,
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# and then broadcasts a message on UDP port 1234 every second.
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# You can receive these with any tool that can receive
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# UDP, e.g. tcpdump, Wireshark, or netcat:
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#
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# nc -l -u -p 1234
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#
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# The WiFi connection details must be configured in Flash as described here:
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# https://github.com/jwhitham/pico-wifi-settings/blob/master/doc/SETTINGS_FILE.md
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#
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# only build wifi_settings_connect example if library is available
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if (TARGET wifi_settings_connect)
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# Build example with async_context tasks running in the background
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# You can use pico_cyw43_arch_lwip_poll instead of
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# pico_cyw43_arch_lwip_threadsafe_background to use polling, if you prefer.
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add_executable(wifi_settings_connect_example
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example.c
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)
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target_include_directories(wifi_settings_connect_example PRIVATE
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${CMAKE_CURRENT_LIST_DIR}
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)
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target_link_libraries(wifi_settings_connect_example
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pico_cyw43_arch_lwip_threadsafe_background
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wifi_settings_connect
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pico_stdlib
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)
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pico_enable_stdio_usb(wifi_settings_connect_example 1)
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pico_enable_stdio_uart(wifi_settings_connect_example 0)
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pico_add_extra_outputs(wifi_settings_connect_example)
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endif ()
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@ -0,0 +1,44 @@
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# wifi\_settings\_connect example
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Example using the wifi\_settings\_connect library to connect to a WiFi hotspot.
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The Flash storage location for hotspot details is specified in
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`include/wifi_settings/wifi_settings_configuration.h`. It is at
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`0x101fc000` (for Pico W) and `0x103fc000` (for Pico 2 W). This
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"wifi-settings file" is a text file which can be edited with any text editor.
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Here is an example of typical contents:
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```
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ssid1=MyHomeWiFi
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pass1=mypassword1234
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ssid2=MyPhoneHotspot
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pass2=secretpassword
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country=GB
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```
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To add your WiFi details at this location, please [see the setup instructions in the pico-extras
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repo](https://github.com/raspberrypi/pico-extras/tree/master/src/rp2_common/wifi_settings_connect/doc/SETTINGS_FILE.md).
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To build this example, first run `cmake` at the top level of the
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`pico-playground` repository, specifying the locations for
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the `pico-sdk` and `pico-extras` repositories, e.g.:
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```
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cd /home/user/pico-playground
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mkdir build
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cd build
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cmake -DPICO_SDK_PATH=/home/user/pico-sdk \
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-DPICO_EXTRAS_PATH=/home/user/pico-extras \
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-DPICO_BOARD=pico_w ..
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```
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Then, run `make` within the `build/wifi_settings_connect/example`
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directory, e.g.
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```
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cd /home/user/pico-playground
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make -C build/wifi_settings_connect/example
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```
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This will create the UF2 file to be downloaded to the Pico
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in `build/wifi_settings_connect/example`.
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The example program will search for WiFi hotspots. If it finds a hotspot which
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matches those configured in Flash, then it will automatically
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connect to it and begin a UDP broadcast. The example program prints
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its status to the USB serial port; connect with a terminal program
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to see what it is doing.
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@ -0,0 +1,157 @@
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/**
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* Copyright (c) 2025 Jack Whitham
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Example for wifi-settings.
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*
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* This example connects to WiFi using wifi_settings_connect functions,
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* and then broadcasts a message on UDP port 1234 every second.
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* You can receive these with any tool that can receive
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* UDP, e.g. tcpdump, Wireshark, or netcat:
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*
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* nc -l -u -p 1234
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*
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* The WiFi connection details must be configured in Flash as described here:
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* https://github.com/jwhitham/pico-wifi-settings/blob/master/doc/SETTINGS_FILE.md
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*/
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#include <string.h>
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#include <time.h>
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#include "pico/stdlib.h"
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#include "pico/cyw43_arch.h"
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#include "pico/bootrom.h"
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#include "lwip/pbuf.h"
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#include "lwip/tcp.h"
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#include "wifi_settings/wifi_settings_connect.h"
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#include "wifi_settings/wifi_settings_hostname.h"
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bool send_udp_packet(uint count) {
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// Send a UDP broadcast to port 1234
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char text[256];
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bool ok = false;
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struct udp_pcb* udp_pcb = udp_new();
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if (!udp_pcb) {
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printf("Failed to allocate space for UDP PCB!\n");
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} else {
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snprintf(text, sizeof(text), "Hello World %u from %s\n", count, wifi_settings_get_hostname());
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const uint size = strlen(text);
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struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
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if (!p) {
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printf("Failed to allocate space for UDP packet!\n");
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} else {
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memcpy(p->payload, text, size);
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ip_addr_t addr;
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ipaddr_aton("255.255.255.255", &addr);
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const err_t err = udp_sendto(udp_pcb, p, &addr, 1234);
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if (err) {
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printf("Failed to send UDP packet! error=%d\n", (int) err);
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} else {
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printf("UDP broadcast, port 1234: %s", text);
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ok = true;
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}
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pbuf_free(p);
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}
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udp_remove(udp_pcb);
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}
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return ok;
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}
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int main() {
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stdio_init_all();
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// Initialise pico-wifi-settings
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int rc = wifi_settings_init();
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if (rc != 0) {
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panic("wifi_settings_init() failed");
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return 1;
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}
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// Begin connecting to WiFi (this function returns immediately)
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wifi_settings_connect();
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uint count = 0;
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bool stay_in_loop = true;
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while (stay_in_loop) {
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// clear screen
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printf("\x1b[2J\r");
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// print host name and board ID
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printf("Hostname = %s\n"
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"Board ID = %s\n\n",
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wifi_settings_get_hostname(),
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wifi_settings_get_board_id_hex());
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fflush(stdout);
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// print connection status
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char text[512];
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wifi_settings_get_connect_status_text(text, sizeof(text));
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printf("%s\n\n", text);
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if (wifi_settings_has_no_wifi_details()) {
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// Help the user if no SSIDs are configured
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printf("You need to configure at least one hotspot! See\n"
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"https://github.com/jwhitham/pico-wifi-settings/blob/master/doc/SETTINGS_FILE.md\n"
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"for instructions.\n\n");
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} else {
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wifi_settings_get_hw_status_text(text, sizeof(text));
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printf("%s\n", text);
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wifi_settings_get_ip_status_text(text, sizeof(text));
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printf("%s\n", text);
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}
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fflush(stdout);
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// Send a UDP broadcast to port 1234 if connected
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if (wifi_settings_is_connected()) {
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if (send_udp_packet(count)) {
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count++;
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}
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}
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printf("press 'c' to connect, 'd' to disconnect, 'r' to return to bootloader\n");
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fflush(stdout);
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switch (getchar_timeout_us(1)) {
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case 'c':
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wifi_settings_connect();
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break;
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case 'd':
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wifi_settings_disconnect();
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break;
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case 'r':
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stay_in_loop = false;
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break;
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default:
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break;
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}
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#if PICO_CYW43_ARCH_POLL
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// if you are using pico_cyw43_arch_poll, then you must poll periodically from your
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// main loop (not from a timer interrupt) to check for wifi_settings, WiFi driver
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// or lwIP work that needs to be done.
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cyw43_arch_poll();
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// you can poll as often as you like, however if you have nothing else to do you can
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// choose to sleep:
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sleep_ms(1000);
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#else
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// if you are not using pico_cyw43_arch_poll, then wifi_settings, WiFI driver and lwIP work
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// is done via interrupt in the background. This sleep is just an example of some (blocking)
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// work you might be doing.
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sleep_ms(1000);
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#endif
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}
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printf("That's all\n");
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// Disconnection and de-initialisation are optional steps
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// with wifi_settings, but you may wish to explicitly stop
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// the WiFi connection for some reason:
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wifi_settings_disconnect();
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wifi_settings_deinit();
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printf("Goodbye\n");
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// return to boot loader
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reset_usb_boot(0, 0);
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return 0;
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}
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@ -0,0 +1,85 @@
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#ifndef _LWIPOPTS_H
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#define _LWIPOPTS_H
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// This example LWIP settings file has been adapted from the pico-examples repo.
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// See https://www.nongnu.org/lwip/2_1_x/group__lwip__opts.html for details.
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// Note: pico-wifi-settings has been tested with LWIP projects that use NO_SYS and
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// don't use LWIP_SOCKET - there has not yet been any attempt to support FreeRTOS.
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#define NO_SYS 1
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#define LWIP_SOCKET 0
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#if PICO_CYW43_ARCH_POLL
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#define MEM_LIBC_MALLOC 1
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#else
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// MEM_LIBC_MALLOC is incompatible with non polling versions
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#define MEM_LIBC_MALLOC 0
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#endif
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#define MEM_ALIGNMENT 4
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#define MEM_SIZE 4000
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#define MEMP_NUM_TCP_SEG 32
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#define MEMP_NUM_ARP_QUEUE 10
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#define PBUF_POOL_SIZE 24
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#define LWIP_ARP 1
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#define LWIP_ETHERNET 1
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#define LWIP_ICMP 1
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#define LWIP_RAW 1
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#define TCP_WND (8 * TCP_MSS)
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#define TCP_MSS 1460
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#define TCP_SND_BUF (8 * TCP_MSS)
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#define TCP_SND_QUEUELEN ((4 * (TCP_SND_BUF) + (TCP_MSS - 1)) / (TCP_MSS))
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#define LWIP_NETIF_STATUS_CALLBACK 1
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#define LWIP_NETIF_LINK_CALLBACK 1
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#define LWIP_NETIF_HOSTNAME 1
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#define LWIP_NETCONN 0
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#define MEM_STATS 0
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#define SYS_STATS 0
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#define MEMP_STATS 0
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#define LINK_STATS 0
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// #define ETH_PAD_SIZE 2
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#define LWIP_CHKSUM_ALGORITHM 3
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#define LWIP_DHCP 1
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#define LWIP_IPV4 1
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#define LWIP_TCP 1
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#define LWIP_UDP 1
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#define LWIP_DNS 1
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#define LWIP_TCP_KEEPALIVE 1
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#define LWIP_NETIF_TX_SINGLE_PBUF 1
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#define DHCP_DOES_ARP_CHECK 0
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#define LWIP_DHCP_DOES_ACD_CHECK 0
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#ifndef NDEBUG
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#define LWIP_DEBUG 1
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#define LWIP_STATS 1
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#define LWIP_STATS_DISPLAY 1
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#endif
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#define ETHARP_DEBUG LWIP_DBG_OFF
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#define NETIF_DEBUG LWIP_DBG_OFF
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#define PBUF_DEBUG LWIP_DBG_OFF
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#define API_LIB_DEBUG LWIP_DBG_OFF
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#define API_MSG_DEBUG LWIP_DBG_OFF
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#define SOCKETS_DEBUG LWIP_DBG_OFF
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#define ICMP_DEBUG LWIP_DBG_OFF
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#define INET_DEBUG LWIP_DBG_OFF
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#define IP_DEBUG LWIP_DBG_OFF
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#define IP_REASS_DEBUG LWIP_DBG_OFF
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#define RAW_DEBUG LWIP_DBG_OFF
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#define MEM_DEBUG LWIP_DBG_OFF
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#define MEMP_DEBUG LWIP_DBG_OFF
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#define SYS_DEBUG LWIP_DBG_OFF
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#define TCP_DEBUG LWIP_DBG_OFF
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#define TCP_INPUT_DEBUG LWIP_DBG_OFF
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#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
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#define TCP_RTO_DEBUG LWIP_DBG_OFF
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#define TCP_CWND_DEBUG LWIP_DBG_OFF
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#define TCP_WND_DEBUG LWIP_DBG_OFF
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#define TCP_FR_DEBUG LWIP_DBG_OFF
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#define TCP_QLEN_DEBUG LWIP_DBG_OFF
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#define TCP_RST_DEBUG LWIP_DBG_OFF
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#define UDP_DEBUG LWIP_DBG_OFF
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#define TCPIP_DEBUG LWIP_DBG_OFF
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#define PPP_DEBUG LWIP_DBG_OFF
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#define SLIP_DEBUG LWIP_DBG_OFF
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#define DHCP_DEBUG LWIP_DBG_OFF
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#endif /* __LWIPOPTS_H__ */
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Ładowanie…
Reference in New Issue