Ready to develop.

.gitignore

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+.vscode/ccls-cache
+build

.gitmodules

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+[submodule "lib/Pico_USB_Host"]
+	path = lib/Pico_USB_Host
+	url = https://gitea.skadubpc.net/ulysse/Pico_USB_Host_Lib.git

.vscode/c_cpp_properties.json

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+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "intelliSenseMode": "linux-gcc-arm",
+            "includePath": [
+                "${env:PICO_SDK_PATH}/src/**/include/",
+                "${env:PICO_SDK_PATH}/lib/**/include/",
+                "${env:PICO_SDK_PATH}/lib/**/src/",
+                "${workspaceFolder}/build/generated/pico_base/",
+                "${workspaceFolder}/src/",
+                "${workspaceFolder}/lib/**/"
+            ],
+            "compilerPath": "/usr/bin/arm-none-eabi-gcc",
+            "cStandard": "c17",
+            "browse": {
+                "path": [
+                    "${workspaceFolder}"
+                ],
+                "limitSymbolsToIncludedHeaders": true,
+                "databaseFilename": ""
+            }
+        }
+    ],
+    "version": 4
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Configure",
+            "detail": "configure project",
+            "type": "shell",
+            "command": "cmake",
+            "args": [
+                "-H.",
+                "-Bbuild"
+            ],
+            "group": "build",
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": true,
+                "panel": "shared",
+                "showReuseMessage": true,
+                "clear": true
+            }
+        },
+        {
+            "label": "Build",
+            "detail": "Build project",
+            "dependsOn": [
+                "Configure"
+            ],
+            "type": "shell",
+            "command": "make",
+            "args": [
+                "-C",
+                "build",
+                "-j$(nproc)"
+            ],
+            "group": "build",
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": true,
+                "panel": "shared",
+                "showReuseMessage": true,
+                "clear": true
+            }
+        },
+        {
+            "label": "Flash Access Point",
+            "detail": "Build and flash access point",
+            "type": "shell",
+            "dependsOn": [
+                "Configure"
+            ],
+            "command": "make",
+            "args": [
+                "-C",
+                "build",
+                "-j$(nproc)",
+                "Flash_Access_Point"
+            ],
+            "group": "build",
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": true,
+                "panel": "shared",
+                "showReuseMessage": true,
+                "clear": true
+            }
+        },
+        {
+            "label": "Flash Station",
+            "detail": "Build and flash station",
+            "type": "shell",
+            "dependsOn": [
+                "Configure"
+            ],
+            "command": "make",
+            "args": [
+                "-C",
+                "build",
+                "-j$(nproc)",
+                "Flash_Station"
+            ],
+            "group": "build",
+            "presentation": {
+                "echo": true,
+                "reveal": "always",
+                "focus": true,
+                "panel": "shared",
+                "showReuseMessage": true,
+                "clear": true
+            }
+        },
+        {
+            "label": "Clean",
+            "detail": "Clean build directory and executable",
+            "type": "shell",
+            "command": "rm",
+            "args": [
+                "-rf",
+                "build"
+            ],
+            "group": "build",
+            "presentation": {
+                "echo": false,
+                "reveal": "never",
+                "focus": false,
+                "panel": "shared",
+                "showReuseMessage": false,
+                "clear": true
+            }
+        }
+    ]
+}

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+# Explicitely define board
+set(PICO_BOARD pico)
+if(NOT DEFINED PICO_BOARD)
+    add_definitions(-DPICO_BOARD=${PICO_BOARD})
+endif()
+
+# Include pico-sdk cmake support
+include($ENV{PICO_SDK_PATH}/external/pico_sdk_import.cmake)
+
+project(Pico_USB_Tests C CXX ASM)
+set(CMAKE_C_STANDARD 17)
+set(CMAKE_CXX_STANDARD 17)
+
+pico_sdk_init()
+
+# Executables and sources
+add_executable(Pico_Host
+  src/main_host.c
+)
+
+add_executable(Pico_Device
+  src/main_device.c
+)
+
+# Libs
+add_subdirectory(lib/Pico_USB_Host)
+
+target_link_libraries(Pico_Host
+  pico_stdlib
+  Pico_USB_Host
+)
+
+target_link_libraries(Pico_Device
+  pico_stdlib
+)
+
+# Stdio configuration
+pico_enable_stdio_usb(Pico_Host 1)
+pico_enable_stdio_uart(Pico_Host 1)
+
+pico_enable_stdio_usb(Pico_Device 1)
+pico_enable_stdio_uart(Pico_Device 1)
+
+# Output
+pico_add_extra_outputs(Pico_Host)
+pico_add_extra_outputs(Pico_Device)
+
+# Flash target
+add_custom_target(Flash_host
+    DEPENDS Pico_Host
+    COMMAND picotool load -f ${PROJECT_BINARY_DIR}/Pico_Host.uf2
+)
+
+add_custom_target(Flash_Device
+    DEPENDS Pico_Device
+    COMMAND picotool load -f ${PROJECT_BINARY_DIR}/Pico_Device.uf2
+)

README.md

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+# PicoW_UDP_Tests
+
+Test of the library PicoW_UDP_Lib.

lib/Pico_USB_Host

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+Subproject commit adffbe805b938541659b6fa4688a5665ddbc5b9e

src/main_device.c

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+#include <pico/stdlib.h>
+
+int main(void)
+{
+    stdio_init_all();
+
+    gpio_init(PICO_DEFAULT_LED_PIN);
+    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+
+    while(true)
+    {
+        static uint64_t last_time = 0;
+        uint64_t time = time_us_64();
+        if(time - last_time > 1000 * 1000)
+        {
+            last_time = time;
+
+            static bool led_state = true;
+            led_state = !led_state;
+
+            gpio_put(PICO_DEFAULT_LED_PIN, led_state);
+        }
+
+        tight_loop_contents();
+    }
+
+    return PICO_OK;
+}

src/main_host.c

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+#include <pico/stdlib.h>
+
+int main(void)
+{
+    stdio_init_all();
+
+    gpio_init(PICO_DEFAULT_LED_PIN);
+    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+
+    for(int i = 0; i < 3; i++)
+    {
+        gpio_put(PICO_DEFAULT_LED_PIN, false);
+        sleep_ms(100);
+        gpio_put(PICO_DEFAULT_LED_PIN, true);
+        sleep_ms(100);
+    }
+
+    while(true)
+    {
+        tight_loop_contents();
+    }
+
+    return PICO_OK;
+}