164 lines
5.7 KiB
C
164 lines
5.7 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : lwns_multicast_example.c
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* Author : WCH
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* Version : V1.0
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* Date : 2021/06/20
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* Description : single-hop multicast，组播传输例子
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "lwns_multicast_example.h"
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//每个文件单独debug打印的开关，置0可以禁止本文件内部打印
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#define DEBUG_PRINT_IN_THIS_FILE 1
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#if DEBUG_PRINT_IN_THIS_FILE
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#define PRINTF(...) PRINT(__VA_ARGS__)
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#else
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#define PRINTF(...) \
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do \
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{ \
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} while(0)
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#endif
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static uint8_t subaddrs_index = 0; //发送订阅地址序号
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#define SUBADDR_NUM 3 //订阅地址数量
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static uint16_t subaddrs[SUBADDR_NUM] = {1, 2, 3}; //订阅地址数组
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static uint8_t TX_DATA[10] =
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{0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39};
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static uint8_t RX_DATA[10];
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static uint16_t lwns_multicast_ProcessEvent(uint8_t task_id, uint16_t events);
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static void multicast_recv(lwns_controller_ptr c, uint16_t subaddr, const lwns_addr_t *sender); //组播接收回调函数
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static void multicast_sent(lwns_controller_ptr ptr); //组播发送完成回调函数
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static lwns_multicast_controller multicast; //声明组播控制结构体
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static uint8_t multicast_taskID; //声明组播控制任务id
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/*********************************************************************
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* @fn multicast_recv
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*
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* @brief lwns multicast接收回调函数
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*
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* @param ptr - 本次接收到的数据所属的组播控制结构体指针.
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* @param subaddr - 本次接收到的数据的订阅地址.
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* @param sender - 本次接收到的数据的发送者地址指针.
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*
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* @return None.
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*/
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static void multicast_recv(lwns_controller_ptr ptr, uint16_t subaddr, const lwns_addr_t *sender)
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{
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uint8_t len;
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len = lwns_buffer_datalen(); //获取当前缓冲区接收到的数据长度
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if(len == 10)
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{
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lwns_buffer_save_data(RX_DATA); //接收数据到用户数据区域
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PRINTF("multicast %d rec from %02x %02x %02x %02x %02x %02x\n",
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get_lwns_object_port(ptr),
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sender->v8[0], sender->v8[1], sender->v8[2], sender->v8[3],
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sender->v8[4], sender->v8[5]); //from为接收到的数据的发送方地址
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PRINTF("subaddr:%d data:", subaddr);
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for(uint8_t i = 0; i < len; i++)
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{
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PRINTF("%02x ", RX_DATA[i]);
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}
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PRINTF("\n");
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}
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else
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{
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PRINTF("data len err\n");
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}
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}
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/*********************************************************************
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* @fn multicast_sent
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*
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* @brief lwns multicast发送完成回调函数
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*
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* @param ptr - 本次发送完成的组播控制结构体指针.
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*
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* @return None.
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*/
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static void multicast_sent(lwns_controller_ptr ptr)
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{
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PRINTF("multicast %d sent\n", get_lwns_object_port(ptr));
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}
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/**
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* lwns组播回调函数结构体，注册回调函数
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*/
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static const struct lwns_multicast_callbacks multicast_callbacks =
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{multicast_recv, multicast_sent};
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/*********************************************************************
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* @fn lwns_multicast_process_init
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*
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* @brief lwns multicast例程初始化.
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*
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* @param None.
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*
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* @return None.
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*/
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void lwns_multicast_process_init(void)
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{
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multicast_taskID = TMOS_ProcessEventRegister(lwns_multicast_ProcessEvent);
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lwns_multicast_init(&multicast,
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136, //打开一个端口号为136的组播
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subaddrs, //订阅地址数组指针
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SUBADDR_NUM, //订阅地址数量
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&multicast_callbacks); //返回0代表打开失败。返回1打开成功。
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tmos_start_task(multicast_taskID, MULTICAST_EXAMPLE_TX_PERIOD_EVT,
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MS1_TO_SYSTEM_TIME(1000));
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}
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/*********************************************************************
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* @fn lwns_multicast_ProcessEvent
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*
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* @brief lwns multicast Task event processor. This function
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* is called to process all events for the task. Events
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* include timers, messages and any other user defined events.
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*
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* @param task_id - The TMOS assigned task ID.
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* @param events - events to process. This is a bit map and can
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* contain more than one event.
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*
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* @return events not processed.
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*/
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uint16_t lwns_multicast_ProcessEvent(uint8_t task_id, uint16_t events)
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{
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if(events & MULTICAST_EXAMPLE_TX_PERIOD_EVT)
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{ //周期性在不同的组播地址上发送组播消息
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uint8_t temp;
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temp = TX_DATA[0];
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for(uint8_t i = 0; i < 9; i++)
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{
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TX_DATA[i] = TX_DATA[i + 1]; //移位发送数据，以便观察效果
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}
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TX_DATA[9] = temp;
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lwns_buffer_load_data(TX_DATA, sizeof(TX_DATA)); //载入需要发送的数据到缓冲区
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if(subaddrs_index >= SUBADDR_NUM)
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{
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subaddrs_index = 0;
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}
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lwns_multicast_send(&multicast, subaddrs[subaddrs_index]); //组播发送数据给指定节点
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subaddrs_index++;
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tmos_start_task(multicast_taskID, MULTICAST_EXAMPLE_TX_PERIOD_EVT,
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MS1_TO_SYSTEM_TIME(1000)); //周期性发送
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return events ^ MULTICAST_EXAMPLE_TX_PERIOD_EVT;
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}
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if(events & SYS_EVENT_MSG)
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{
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uint8_t *pMsg;
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if((pMsg = tmos_msg_receive(task_id)) != NULL)
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{
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// Release the TMOS message
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tmos_msg_deallocate(pMsg);
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}
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// return unprocessed events
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return (events ^ SYS_EVENT_MSG);
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}
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return 0;
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}
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