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c++使用队列queque的时候需不需要导库

时间: 2025-06-12 11:12:23 浏览: 11
<think>嗯,用户问的是在C++中使用队列queue时是否需要导库。这个问题看起来挺基础的,但作为刚开始学C++的人可能会有点困惑,毕竟不同的语言处理数据结构的方式不同。比如在Python里,直接可以用,但C++可能需要包含头文件或者使用命名空间之类的。 首先,我得回忆一下C++的标准库结构。C++的标准模板库(STL)里确实有queue这个容器适配器,它通常是在<queue>头文件中定义的。所以用户需要包含这个头文件才能使用queue。不过有时候可能会和其他的数据结构搞混,比如stack或者deque,但queue确实是单独的头文件。 然后,考虑到用户可能对include和using namespace std的关系不太清楚。需要告诉用户不仅要包含<queue>,还要注意std命名空间,否则可能需要用std::queue来声明。不过一般建议使用using namespace std或者在代码中显式指明。 另外,用户可能在实际编程中遇到编译错误,比如“queue未声明”,这时候可能就是忘记包含头文件或者没有使用std命名空间。应该提醒用户检查这两个方面。 还有,可能需要简单介绍一下queue的基本用法,比如如何声明、常用的成员函数如push、pop、front等,这样用户能更清楚如何正确使用。同时,提醒他们queue是一个适配器,默认基于deque实现,但也可以换用list等容器,不过这可能对新手来说有点高级,暂时提一下即可。 总结一下,回答应该分步骤:包含头文件、使用命名空间、示例代码,以及常见错误的解决方法。确保用户能一步步操作,避免混淆。</think>在 C++ 中使用标准库提供的队列(`std::queue`)时,需要遵循以下步骤: 1. **必须包含头文件** 需在代码开头添加 `#include <queue>`,这是队列容器的标准头文件。 2. **命名空间** 推荐使用 `using namespace std;` 或在代码中显式标注 `std::queue`。 --- ### 示例代码 ```cpp #include <queue> // 必须包含的头文件 int main() { std::queue<int> myQueue; // 声明一个整数队列 myQueue.push(10); // 入队操作 myQueue.pop(); // 出队操作(需确保队列非空) return 0; } ``` --- ### 常见问题 - **错误提示 "queue is not a member of std"** 原因:未包含 `<queue>` 头文件或拼写错误。 - **队列的特性** `std::queue` 是容器适配器,默认基于 `std::deque` 实现,遵循先进先出(FIFO)规则。 --- ### 关键函数 | 函数 | 作用 | 时间复杂度 | |-------------|--------------------------|------------| | `push(val)` | 将元素插入队尾 | O(1) | | `pop()` | 移除队首元素(需非空) | O(1) | | `front()` | 访问队首元素(需非空) | O(1) | | `back()` | 访问队尾元素(需非空) | O(1) | | `empty()` | 检查队列是否为空 | O(1) | | `size()` | 返回队列中元素数量 | O(1) | --- 总结:**必须显式包含 `<queue>` 头文件**,这是使用标准库队列的必要条件。
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/*! \file main.c \brief Implementation of ble datatrans server demo. \version 2023-07-20, V1.0.0, firmware for GD32VW55x */ /* Copyright (c) 2023, GigaDevice Semiconductor Inc. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <stdint.h> #include "dbg_print.h" #include "gd32vw55x_platform.h" #include "wrapper_os.h" #include "ble_adapter.h" #include "ble_adv.h" #include "ble_conn.h" #include "ble_utils.h" #include "ble_export.h" #include "ble_sec.h" #include "ble_datatrans_srv.h" #include "app_uart.h" /* Device name */ #define DEV_NAME "GD-BLE-DEV" /* Device name length*/ #define DEV_NAME_LEN strlen(dev_name) /* Advertising parameters */ typedef struct { uint8_t adv_idx; /*!< Advertising id. use to stop advertising */ ble_adv_state_t adv_state; /*!< Advertising state */ } app_adv_param_t; /* Definitions of the different task priorities */ enum { BLE_STACK_TASK_PRIORITY = OS_TASK_PRIORITY(2), /*!< Priority of the BLE stack task */ BLE_APP_TASK_PRIORITY = OS_TASK_PRIORITY(1), /*!< Priority of the BLE APP task */ }; /* Definitions of the different BLE task stack size requirements */ enum { BLE_STACK_TASK_STACK_SIZE = 768, /*!< BLE stack task stack size */ BLE_APP_TASK_STACK_SIZE = 512, /*!< BLE APP task stack size */ }; /* Device name array*/ char dev_name[] = {DEV_NAME}; /* advertising env*/ app_adv_param_t app_adv_env = {0}; /* connection index */ uint8_t conn_idx = 0; /*! \brief Start advertising \param[in] p_adv: pointer to BLE advertising set \param[out] none \retval none */ static ble_status_t app_adv_start(void) { ble_data_t adv_data = {0}; ble_data_t adv_scanrsp_data = {0}; ble_adv_data_set_t adv = {0}; ble_adv_data_set_t scan_rsp = {0}; uint8_t data[BLE_GAP_LEGACY_ADV_MAX_LEN] = {0}; uint8_t idx = 0; data[idx++] = 2; data[idx++] = BLE_AD_TYPE_FLAGS; data[idx++] = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED | BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE; data[idx++] = DEV_NAME_LEN + 1; data[idx++] = 0x09; memcpy(&data[idx], dev_name, DEV_NAME_LEN); idx += DEV_NAME_LEN; adv_data.len = idx; adv_data.p_data = data; adv_scanrsp_data.len = idx - 3; adv_scanrsp_data.p_data = &data[3]; adv.data_force = true; adv.data.p_data_force = &adv_data; scan_rsp.data_force = true; scan_rsp.data.p_data_force = &adv_scanrsp_data; return ble_adv_start(app_adv_env.adv_idx, &adv, &scan_rsp, NULL); } /*! \brief Callback function to handle BLE advertising events \param[in] adv_evt: BLE advertising event type \param[in] p_data: pointer to BLE advertising event data \param[in] p_context: context data used when create advertising \param[out] none \retval none */ static void app_adv_mgr_evt_hdlr(ble_adv_evt_t adv_evt, void *p_data, void *p_context) { if (adv_evt == BLE_ADV_EVT_STATE_CHG) { ble_adv_state_chg_t *p_chg = (ble_adv_state_chg_t *)p_data; ble_adv_state_t old_state = app_adv_env.adv_state; app_print("%s state change 0x%x ==> 0x%x, reason 0x%x\r\n", __func__, old_state, p_chg->state, p_chg->reason); app_adv_env.adv_state = p_chg->state; if ((p_chg->state == BLE_ADV_STATE_CREATE) && (old_state == BLE_ADV_STATE_CREATING)) { app_adv_env.adv_idx = p_chg->adv_idx; app_adv_start(); } } } /*! \brief Create an advertising \param[in] p_param: pointer to advertising parameters \param[out] none \retval ble_status_t: BLE_ERR_NO_ERROR on success, otherwise an error code */ static ble_status_t app_adv_create(void) { ble_adv_param_t adv_param = {0}; adv_param.param.disc_mode = BLE_GAP_ADV_MODE_GEN_DISC; adv_param.param.own_addr_type = BLE_GAP_LOCAL_ADDR_STATIC; adv_param.param.type = BLE_GAP_ADV_TYPE_LEGACY; adv_param.param.prop = BLE_GAP_ADV_PROP_UNDIR_CONN; adv_param.param.filter_pol = BLE_GAP_ADV_ALLOW_SCAN_ANY_CON_ANY; adv_param.param.ch_map = 0x07; adv_param.param.primary_phy = BLE_GAP_PHY_1MBPS; adv_param.param.adv_intv_min = 160; adv_param.param.adv_intv_max = 160; adv_param.restart_after_disconn = true; return ble_adv_create(&adv_param, app_adv_mgr_evt_hdlr, NULL); } /*! \brief Function to execute app code after stack ready \param[in] none \param[out] none \retval none */ void ble_task_ready(void) { app_adv_create(); } /*! \brief Callback function to handle BLE adapter events \param[in] event: BLE adapter event type \param[in] p_data: pointer to BLE adapter event data \param[out] none \retval none */ static void app_adp_evt_handler(ble_adp_evt_t event, ble_adp_data_u *p_data) { uint8_t i = 0; if (event == BLE_ADP_EVT_ENABLE_CMPL_INFO) { if (p_data->adapter_info.status == BLE_ERR_NO_ERROR) { app_print("=== Adapter enable success ===\r\n"); app_print("hci_ver 0x%x, hci_subver 0x%x, lmp_ver 0x%x, lmp_subver 0x%x, manuf_name 0x%x\r\n", p_data->adapter_info.version.hci_ver, p_data->adapter_info.version.hci_subver, p_data->adapter_info.version.lmp_ver, p_data->adapter_info.version.lmp_subver, p_data->adapter_info.version.manuf_name); app_print("adv_set_num %u, min_tx_pwr %d, max_tx_pwr %d, max_adv_data_len %d \r\n", p_data->adapter_info.adv_set_num, p_data->adapter_info.tx_pwr_range.min_tx_pwr, p_data->adapter_info.tx_pwr_range.max_tx_pwr, p_data->adapter_info.max_adv_data_len); app_print("sugg_max_tx_octets %u, sugg_max_tx_time %u \r\n", p_data->adapter_info.sugg_dft_data.sugg_max_tx_octets, p_data->adapter_info.sugg_dft_data.sugg_max_tx_time); app_print("loc irk:"); for (i = 0; i < BLE_GAP_KEY_LEN; i++) { app_print(" %02x", p_data->adapter_info.loc_irk_info.irk[i]); } app_print("\r\n"); app_print("identity addr %02X:%02X:%02X:%02X:%02X:%02X \r\n ", p_data->adapter_info.loc_irk_info.identity.addr[5], p_data->adapter_info.loc_irk_info.identity.addr[4], p_data->adapter_info.loc_irk_info.identity.addr[3], p_data->adapter_info.loc_irk_info.identity.addr[2], p_data->adapter_info.loc_irk_info.identity.addr[1], p_data->adapter_info.loc_irk_info.identity.addr[0]); app_print("=== BLE Adapter enable complete ===\r\n"); ble_task_ready(); } else { app_print("=== BLE Adapter enable fail ===\r\n"); } } } /*! \brief Init adapter application module \param[in] none \param[out] none \retval none */ void app_adapter_init(void) { ble_adp_callback_register(app_adp_evt_handler); } /*! \brief Send security request \param[in] conidx: connection index \param[out] none \retval none */ void app_sec_send_security_req(uint8_t conidx) { uint8_t auth = BLE_GAP_AUTH_REQ_NO_MITM_NO_BOND; if (ble_sec_security_req(conidx, auth) != BLE_ERR_NO_ERROR) { app_print("app_sec_send_security_req fail! \r\n"); } } /*! \brief Callback function to handle BLE connection event \param[in] event: BLE connection event type \param[in] p_data: pointer to BLE connection event data \param[out] none \retval none */ static void app_conn_evt_handler(ble_conn_evt_t event, ble_conn_data_u *p_data) { switch (event) { case BLE_CONN_EVT_STATE_CHG: { if (p_data->conn_state.state == BLE_CONN_STATE_DISCONNECTD) { app_print("disconnected. conn idx: %u, conn_hdl: 0x%x reason 0x%x\r\n", p_data->conn_state.info.discon_info.conn_idx, p_data->conn_state.info.discon_info.conn_hdl, p_data->conn_state.info.discon_info.reason); } else if (p_data->conn_state.state == BLE_CONN_STATE_CONNECTED) { app_print("connect success. conn idx:%u, conn_hdl:0x%x \r\n", p_data->conn_state.info.conn_info.conn_idx, p_data->conn_state.info.conn_info.conn_hdl); if (p_data->conn_state.info.conn_info.role == BLE_SLAVE) { app_sec_send_security_req(p_data->conn_state.info.conn_info.conn_idx); } conn_idx = p_data->conn_state.info.conn_info.conn_idx; } } break; case BLE_CONN_EVT_PARAM_UPDATE_IND: { app_print("conn idx %u, intv_min 0x%x, intv_max 0x%x, latency %u, supv_tout %u\r\n", p_data->conn_param_req_ind.conn_idx, p_data->conn_param_req_ind.intv_min, p_data->conn_param_req_ind.intv_max, p_data->conn_param_req_ind.latency, p_data->conn_param_req_ind.supv_tout); ble_conn_param_update_cfm(p_data->conn_param_req_ind.conn_idx, true, 2, 4); } break; case BLE_CONN_EVT_PARAM_UPDATE_RSP: { app_print("conn idx %u, param update result status: 0x%x\r\n", p_data->conn_param_rsp.conn_idx, p_data->conn_param_rsp.status); } break; case BLE_CONN_EVT_PARAM_UPDATE_INFO: { app_print("conn idx %u, param update ind: interval %d, latency %d, sup to %d\r\n", p_data->conn_params.conn_idx, p_data->conn_params.interval, p_data->conn_params.latency, p_data->conn_params.supv_tout); } break; case BLE_CONN_EVT_PKT_SIZE_SET_RSP: { app_print("conn idx %u, packet size set status 0x%x\r\n", p_data->pkt_size_set_rsp.conn_idx, p_data->pkt_size_set_rsp.status); } break; case BLE_CONN_EVT_PKT_SIZE_INFO: { app_print("le pkt size info: conn idx %u, tx oct %d, tx time %d, rx oct %d, rx time %d\r\n", p_data->pkt_size_info.conn_idx, p_data->pkt_size_info.max_tx_octets, p_data->pkt_size_info.max_tx_time, p_data->pkt_size_info.max_rx_octets, p_data->pkt_size_info.max_rx_time); } break; case BLE_CONN_EVT_NAME_GET_IND: { ble_conn_name_get_cfm(p_data->name_get_ind.conn_idx, 0, p_data->name_get_ind.token, DEV_NAME_LEN, (uint8_t *)dev_name, DEV_NAME_LEN); } break; case BLE_CONN_EVT_APPEARANCE_GET_IND: { ble_conn_appearance_get_cfm(p_data->appearance_get_ind.conn_idx, 0, p_data->appearance_get_ind.token, 0); } break; default: break; } } /*! \brief Callback function to handle @ref BLE_SEC_EVT_PAIRING_REQ_IND event \param[in] p_ind: pointer to the pairing request indication data \param[out] none \retval none */ static void app_pairing_req_hdlr(ble_gap_pairing_req_ind_t *p_ind) { ble_gap_pairing_param_t param = {0}; param.auth = BLE_GAP_AUTH_MASK_NONE; param.iocap = BLE_GAP_IO_CAP_NO_IO; param.key_size = 16; param.ikey_dist = BLE_GAP_KDIST_IDKEY | BLE_GAP_KDIST_SIGNKEY | BLE_GAP_KDIST_ENCKEY; param.rkey_dist = BLE_GAP_KDIST_IDKEY | BLE_GAP_KDIST_SIGNKEY | BLE_GAP_KDIST_ENCKEY; ble_sec_pairing_req_cfm(p_ind->conn_idx, true, ¶m, BLE_GAP_NO_SEC); } /*! \brief Callback function to handle @ref BLE_SEC_EVT_PAIRING_FAIL_INFO event \param[in] p_info: pointer to the pairing fail information data \param[out] none \retval none */ static void app_pairing_fail_hdlr(ble_sec_pairing_fail_t *p_info) { app_print("pairing fail reason 0x%x\r\n", p_info->param.reason); } /*! \brief Callback function to handle @ref BLE_SEC_EVT_PAIRING_SUCCESS_INFO event \param[in] p_info: pointer to the pairing success information data \param[out] none \retval none */ static void app_pairing_success_hdlr(ble_sec_pairing_success_t *p_info) { app_print("conn_idx %u pairing success, level 0x%x ltk_present %d sc %d\r\n", p_info->conidx, p_info->bond_info.pairing_lvl, p_info->bond_info.enc_key_present, p_info->sc); } /*! \brief Callback function to handle BLE security events \param[in] event: BLE security event type \param[in] p_data: pointer to the BLE security event data \param[out] none \retval none */ static void app_sec_evt_handler(ble_sec_evt_t event, ble_sec_data_u *p_data) { switch (event) { case BLE_SEC_EVT_PAIRING_REQ_IND: app_pairing_req_hdlr((ble_gap_pairing_req_ind_t *)p_data); break; case BLE_SEC_EVT_PAIRING_SUCCESS_INFO: app_pairing_success_hdlr((ble_sec_pairing_success_t *)p_data); break; case BLE_SEC_EVT_PAIRING_FAIL_INFO: app_pairing_fail_hdlr((ble_sec_pairing_fail_t *)p_data); break; default: break; } } /*! \brief Callback function to handle data received by datatrans server service \param[in] data_len: received data length \param[in] p_data: pointer to received data \param[out] none \retval none */ void app_datatrans_srv_rx_callback(uint16_t data_len, uint8_t *p_data) { uint8_t *p_str = sys_malloc(data_len + 1); if (p_str) { app_print("datatrans srv receive data: \r\n"); memset(p_str, 0, data_len + 1); memcpy(p_str, p_data, data_len); app_print("%s\r\n", p_str); sys_mfree(p_str); } } /*! \brief Init application security module \param[in] none \param[out] none \retval none */ void app_sec_mgr_init(void) { ble_sec_callback_register(app_sec_evt_handler); } /*! \brief Init APP connection manager module \param[in] none \param[out] none \retval none */ void app_conn_mgr_init(void) { ble_conn_callback_register(app_conn_evt_handler); } /*! \brief Init BLE component modules needed \param[in] none \param[out] none \retval none */ void ble_init(void) { ble_init_param_t param = {0}; ble_os_api_t os_interface = { .os_malloc = sys_malloc, .os_calloc = sys_calloc, .os_mfree = sys_mfree, .os_memset = sys_memset, .os_memcpy = sys_memcpy, .os_memcmp = sys_memcmp, .os_task_create = sys_task_create, .os_task_init_notification = sys_task_init_notification, .os_task_wait_notification = sys_task_wait_notification, .os_task_notify = sys_task_notify, .os_task_delete = sys_task_delete, .os_ms_sleep = sys_ms_sleep, .os_current_task_handle_get = sys_current_task_handle_get, .os_queue_init = sys_queue_init, .os_queue_free = sys_queue_free, .os_queue_write = sys_queue_write, .os_queue_read = sys_queue_read, .os_random_bytes_get = sys_random_bytes_get, }; ble_power_on(); param.role = BLE_GAP_ROLE_PERIPHERAL; param.keys_user_mgr = false; param.pairing_mode = BLE_GAP_PAIRING_SECURE_CONNECTION | BLE_GAP_PAIRING_LEGACY; param.privacy_cfg = BLE_GAP_PRIV_CFG_PRIV_EN_BIT; param.ble_task_stack_size = BLE_STACK_TASK_STACK_SIZE; param.ble_task_priority = BLE_STACK_TASK_PRIORITY; param.ble_app_task_stack_size = BLE_APP_TASK_STACK_SIZE; param.ble_app_task_priority = BLE_APP_TASK_PRIORITY; param.name_perm = BLE_GAP_WRITE_NOT_ENC; param.appearance_perm = BLE_GAP_WRITE_NOT_ENC; param.en_cfg = 0; param.p_os_api = &os_interface; ble_sw_init(¶m); app_adapter_init(); app_conn_mgr_init(); app_sec_mgr_init(); ble_datatrans_srv_init(); ble_datatrans_srv_rx_cb_reg(app_datatrans_srv_rx_callback); /* The BLE interrupt must be enabled after ble_sw_init. */ ble_irq_enable(); } /*! \brief Main entry point This function is called right after the booting process has completed. \param[in] none \param[out] none \retval none */ int main(void) { sys_os_init(); platform_init(); app_uart_init(); ble_init(); sys_os_start(); for ( ; ; ); } /*! \file app_uart.c \brief APP UART for GD32VW55x SDK. \version 2023-07-20, V1.0.0, firmware for GD32VW55x */ /* Copyright (c) 2023, GigaDevice Semiconductor Inc. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <ctype.h> #include "gd32vw55x.h" #include <stdio.h> #include "app_uart.h" #include "wrapper_os.h" #include "dbg_print.h" #include "wakelock.h" #include "log_uart.h" #include "ble_datatrans_srv.h" /* Priority of the uart task */ #define UART_TASK_PRIORITY OS_TASK_PRIORITY(4) /* Uart queque size */ #define UART_QUEUE_SIZE 3 /* Message format */ struct uart_msg { uint16_t len; /*!< Length, in bytes, of the message */ void *data; /*!< Pointer to the message */ }; extern uint8_t conn_idx; /* Uart queque */ static os_queue_t uart_queue; /* Uart cyclic buffer */ static cyclic_buf_t uart_cyc_buf; /* Uart RX buffer */ char uart_rx_buf[UART_BUFFER_SIZE]; /* Uart RX buffer index*/ uint32_t uart_index = 0; /*! \brief app uart rx handle \param[in] uart_cyc_buf: uart cyclic buffer \param[out] buf: data buf \param[in] len: data length \retval none */ static void app_uart_rx_handle_done(cyclic_buf_t *uart_cyc_buf, uint8_t *buf, uint16_t *len) { if (*len > cyclic_buf_count(uart_cyc_buf)) { *len = cyclic_buf_count(uart_cyc_buf); } if (buf == NULL) { cyclic_buf_drop(uart_cyc_buf, *len); } else { cyclic_buf_read(uart_cyc_buf, buf, *len); } } /*! \brief uart message precess \param[in] msg: uart message \retval none */ static void app_uart_msg_process(struct uart_msg *msg) { cyclic_buf_t *p_cyclic_buf = (cyclic_buf_t *)msg->data; char *command; command = sys_malloc(msg->len + 1); if (command == NULL) { app_print("No buffer alloc for uart msg !\r\n"); return; } app_uart_rx_handle_done((cyclic_buf_t *)msg->data, (uint8_t *)command, &msg->len); command[msg->len] = '\0'; if (ble_datatrans_srv_tx(conn_idx, (uint8_t *)command, msg->len) == BLE_ERR_NO_ERROR) { app_print("datatrans srv send data: \r\n"); app_print("%s\r\n", command); } sys_mfree(command); return; } /*! \brief uart task \param[in] param: \retval none */ static void app_uart_task(void *param) { struct uart_msg msg; for (;;) { sys_queue_read(&uart_queue, &msg, -1, false); app_uart_msg_process(&msg); } } /*! \brief uart message send \param[in] msg_data: message data \param[in] len: message length \retval success 0 */ int app_uart_send(void *msg_data, uint16_t len) { struct uart_msg msg; msg.len = len; msg.data = msg_data; return sys_queue_write(&uart_queue, &msg, 0, true); } /*! \brief uart rx data handler \param[in] none \retval none */ static void rx_handler(void) { // uart_index - 2 to remove 0x0d and 0x0a when using Husky if (uart_index > 2) { if (app_uart_send((void *)(&uart_cyc_buf), uart_index - 2) == 0) { if (cyclic_buf_write(&uart_cyc_buf, (uint8_t *)uart_rx_buf, uart_index - 2) == false) { dbg_print(ERR, "uart cyclic buffer full\r\n"); } } else { /* queue was full */ dbg_print(ERR, "queue full\r\n"); /* TODO: report 'message ignored' status */ } } uart_index = 0; } /*! \brief app uart rx irq handler \param[in] uart_port: uart port \retval none */ static void app_uart_rx_irq_hdl(uint32_t uart_port) { usart_interrupt_disable(uart_port, USART_INT_RBNE); while (1) { // We should have chance to check overflow error // Otherwise it may cause dead loop handle rx interrupt if (RESET != usart_flag_get(uart_port, USART_FLAG_ORERR)) { usart_flag_clear(uart_port, USART_FLAG_ORERR); } if ((RESET != usart_flag_get(uart_port, USART_FLAG_RBNE))) { uart_rx_buf[uart_index++] = (char)usart_data_receive(uart_port); if (uart_index >= UART_BUFFER_SIZE) { uart_index = 0; } } else { break; } } if (RESET != usart_flag_get(uart_port, USART_FLAG_IDLE)) { usart_flag_clear(UART2, USART_FLAG_IDLE); if (uart_index > 0) rx_handler(); } sys_wakelock_release(LOCK_ID_USART); usart_interrupt_enable(uart_port, USART_INT_RBNE); } /*! \brief app uart config \param[in] none \retval none */ void app_uart_config(void) { rcu_periph_clock_disable(RCU_GPIOA); rcu_periph_clock_disable(RCU_GPIOB); rcu_periph_clock_disable(RCU_UART2); rcu_periph_clock_enable(RCU_GPIOA); rcu_periph_clock_enable(RCU_GPIOB); rcu_periph_clock_enable(RCU_UART2); gpio_af_set(UART2_TX_GPIO, UART2_TX_AF_NUM, UART2_TX_PIN); gpio_af_set(UART2_RX_GPIO, UART2_RX_AF_NUM, UART2_RX_PIN); gpio_mode_set(UART2_TX_GPIO, GPIO_MODE_AF, GPIO_PUPD_NONE, UART2_TX_PIN); gpio_output_options_set(UART2_TX_GPIO, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, UART2_TX_PIN); gpio_mode_set(UART2_RX_GPIO, GPIO_MODE_AF, GPIO_PUPD_NONE, UART2_RX_PIN); gpio_output_options_set(UART2_RX_GPIO, GPIO_OTYPE_PP, GPIO_OSPEED_25MHZ, UART2_RX_PIN); /* close printf buffer */ setvbuf(stdout, NULL, _IONBF, 0); usart_deinit(UART2); usart_word_length_set(UART2, USART_WL_8BIT); usart_stop_bit_set(UART2, USART_STB_1BIT); usart_parity_config(UART2, USART_PM_NONE); usart_baudrate_set(UART2, 115200U); usart_receive_config(UART2, USART_RECEIVE_ENABLE); usart_transmit_config(UART2, USART_TRANSMIT_ENABLE); usart_interrupt_enable(UART2, USART_INT_RBNE); usart_receive_fifo_enable(UART2); usart_enable(UART2); /*wait IDLEF set and clear it*/ while(RESET == usart_flag_get(UART2, USART_FLAG_IDLE)) { } usart_flag_clear(UART2, USART_FLAG_IDLE); usart_interrupt_enable(UART2, USART_INT_IDLE); } /*! \brief app uart initialize \retval success 0 */ int app_uart_init(void) { if (sys_task_create_dynamic((const uint8_t *)"UART task", 512, UART_TASK_PRIORITY, app_uart_task, NULL) == NULL) { return -1; } if (sys_queue_init(&uart_queue, UART_QUEUE_SIZE, sizeof(struct uart_msg))) { return -2; } app_uart_config(); memset(uart_rx_buf, 0, UART_BUFFER_SIZE); uart_index = 0; cyclic_buf_init(&uart_cyc_buf, 4 * UART_BUFFER_SIZE); uart_irq_callback_register(UART2, app_uart_rx_irq_hdl); return 0; } 详细介绍代码

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