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ESP32-C6 是一款具有双 CAN 接口的微控制器,它支持 TWAI(Time-Triggered CAN)协议。要在 ESP32-C6 上实现两路 TWAI 读写,可以按照以下步骤进行:
1. 首先,确保您已经安装了 ESP-IDF 开发环境。如果没有,请访问 https://docs.espressif.com/projects/esp-idf/en/latest/esp32c6/getting-started/index.html 了解如何安装。 2. 创建一个新的 ESP-IDF 项目。在命令行中,输入以下命令: ``` mkdir my_twai_project cd my_twai_project git clone https://github.com/espressif/esp-idf.git cd esp-idf git checkout release/v4.4 cd .. ./esp-idf/install.sh export IDF_PATH=$(pwd) cd .. ``` 3. 配置项目。在 `my_twai_project` 目录下,创建一个新的 CMakeLists.txt 文件,内容如下: ``` cmake_minimum_required(VERSION 3.5) set(PROJECT_NAME "my_twai_project") project(${PROJECT_NAME}) include($ENV{IDF_PATH}/tools/cmake/project.cmake) ``` 4. 创建一个新的源文件,例如 `main.c`,并在其中编写以下代码: ```c #include #include #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "esp_log.h" #include "driver/can.h" static const char *TAG = "TWAI_EXAMPLE"; void twai_example_task(void *arg) { can_device_handle_t can0_handle, can1_handle; can_timing_config_t can_timing = CAN_TIMING_CONFIG_500KBPS(); // 初始化 CAN 接口 0 can_driver_install(can0, &can_timing, CAN_MODE_NORMAL); can0_handle = can_get_device_handle(can0); // 初始化 CAN 接口 1 can_driver_install(can1, &can_timing, CAN_MODE_NORMAL); can1_handle = can_get_device_handle(can1); // 配置 CAN 接口 0 的过滤器 can_filter_config_t can0_filter = { .acceptance_code = 0x123, .acceptance_mask = 0x1FF, .single_filter = true }; can_filter_set_config(can0_handle, 0, &can0_filter); // 配置 CAN 接口 1 的过滤器 can_filter_config_t can1_filter = { .acceptance_code = 0x456, .acceptance_mask = 0x7FF, .single_filter = true }; can_filter_set_config(can1_handle, 0, &can1_filter); // 创建 CAN 消息结构体 can_message_t message; message.identifier = 0x100; // 消息 ID message.data_length_code = 8; // 数据长度 message.data = "ABCDEFGH"; // 消息数据 // 发送消息到 CAN 接口 0 can_write_message(can0_handle, &message, portMAX_DELAY); // 发送消息到 CAN 接口 1 message.identifier = 0x200; can_write_message(can1_handle, &message, portMAX_DELAY); // 接收消息 can_message_t received_message; can_receive_message(can0_handle, &received_message, portMAX_DELAY); ESP_LOGI(TAG, "Received message on CAN0: ID=%03x, DLC=%d, Data=%s", received_message.identifier, received_message.data_length_code, received_message.data); can_receive_message(can1_handle, &received_message, portMAX_DELAY); ESP_LOGI(TAG, "Received message on CAN1: ID=%03x, DLC=%d, Data=%s", received_message.identifier, received_message.data_length_code, received_message.data); // 卸载 CAN 驱动 can_driver_uninstall(can0_handle); can_driver_uninstall(can1_handle); vTaskDelete(NULL); } void app_main() { xTaskCreatePinnedToCore(twai_example_task, "twai_example_task", 4096, NULL, 5, NULL, 0); } ``` 5. 编译并烧录程序。在 `my_twai_project` 目录下,执行以下命令: ``` idf.py set-target esp32c6 idf.py menuconfig idf.py build idf.py flash idf.py monitor ``` 6. 运行程序并观察输出。您应该能够看到通过两个 CAN 接口发送 |
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有没有办法在不使用混杂模式的情况下实现Wifi驱动程序接收缓冲区访问中断呢?
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