180 lines
6.0 KiB
Markdown
180 lines
6.0 KiB
Markdown
# 红外遥控贪吃蛇/显示+上传温度等数据到云平台
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**梁浚超** 导师：**李镇鸿**
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[成果展示视频链接(new)(https://www.bilibili.com/video/BV1VqeceTEts) ](https://www.bilibili.com/video/BV1VqeceTEts)
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[简略教程视频链接(https://www.bilibili.com/video/BV15uYqeME6t)](https://www.bilibili.com/video/BV15uYqeME6t)
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[成果展示视频链接(https://www.bilibili.com/video/BV1x3YSesEcw)](https://www.bilibili.com/video/BV1x3YSesEcw)
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## 主要内容
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- [红外遥控贪吃蛇/显示+上传温度等数据到云平台](#红外遥控贪吃蛇显示上传温度等数据到云平台)
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- [主要内容](#主要内容)
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- [1. LCD显示温湿度等数据](#1-lcd显示温湿度等数据)
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- [1.1 LCD显示字符串](#11-lcd显示字符串)
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- [1.2 屏幕圆角](#12-屏幕圆角)
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- [2. LCD贪吃蛇小游戏](#2-lcd贪吃蛇小游戏)
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- [2.1 循环队列储存蛇身的坐标](#21-循环队列储存蛇身的坐标)
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- [2.2 放弃使用bool记录地图](#22-放弃使用bool记录地图)
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- [2.3 随机运动](#23-随机运动)
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- [2.4 引入按键](#24-引入按键)
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- [2.5 红外遥控](#25-红外遥控)
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- [3. 红外遥控](#3-红外遥控)
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- [3.1 填好对应的pin](#31-填好对应的pin)
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- [3.2 找到合适的遥控器](#32-找到合适的遥控器)
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- [3.3 基本操作](#33-基本操作)
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- [3.4 导致LCD闪烁](#34-导致lcd闪烁)
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- [4. 时间获取，显示](#4-时间获取显示)
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- [5. 菜单切换](#5-菜单切换)
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- [6. MQTT上传温湿度等数据到云平台](#6-mqtt上传温湿度等数据到云平台)
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- [6.1 简单修改](#61-简单修改)
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- [6.2 连接WiFi](#62-连接wifi)
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- [6.3 阿里云平台查看数据](#63-阿里云平台查看数据)
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- [光照强度](#光照强度)
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- [接近感应](#接近感应)
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- [蛇长](#蛇长)
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- [湿度](#湿度)
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- [温度](#温度)
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- [6.4 开启关闭MQTT](#64-开启关闭mqtt)
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- [展望](#展望)
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- [感谢](#感谢)
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## 1. LCD显示温湿度等数据
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[成果展示视频链接1:10(new)(https://www.bilibili.com/video/BV1VqeceTEts) ](https://www.bilibili.com/video/BV1VqeceTEts)
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### 1.1 LCD显示字符串
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左上角是（0，0） →x，↓y
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``` c
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void easy_show_lcd(char *title, float Temp)
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{
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lcd_show_string(10, plus_lcd_y(24), 24, title);
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rt_sprintf(tmp, "%f", Temp);
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lcd_show_string(10, plus_lcd_y(32), 32, tmp);
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}
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```
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### 1.2 屏幕圆角
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勾股定理、⚪的公式
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``` c
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if ((newi * newi + newj * newj) > (r * r))
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{
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lcd_black(i, j);
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}
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```
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## 2. LCD贪吃蛇小游戏
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[视频展示](https://www.bilibili.com/video/BV1WHafe1EBh/?spm_id_from=333.999.0.0&vd_source=4ac343050490681bfc3be821b46a4a18)
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### 2.1 循环队列储存蛇身的坐标
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``` c
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int snake_head = 2, snake_tail = 0; // 蛇头，蛇尾
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new_head_x = (snake_list[snake_head][0] + snake_direction[now_direction][0] + SNAKE_MAX) % (SNAKE_MAX);
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```
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### 2.2 放弃使用bool记录地图
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内存不够
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### 2.3 随机运动
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``` c
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int snake_direction[4][2] = {{0, -1}, {-1, 0}, {0, 1}, {1, 0}}; // 上，左，下，右
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```
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``` c
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// 50%的概率保持当前方向
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if (rand() % 100 < 50)
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{
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new_direction = rand() % 3;
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now_direction = (now_direction + 3 + new_direction) % 4; // 防止反向、走回头路
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}
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```
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### 2.4 引入按键
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修改`now_direction`就可以了
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### 2.5 红外遥控
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## 3. 红外遥控
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### 3.1 填好对应的pin
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### 3.2 找到合适的遥控器
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| 编号（key）| 功能 |
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| :----: | :----: |
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| 0x30| 上 |
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| 0xE8 | 左 |
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| 0xB0 | 下 |
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| 0x68 | 右 |
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| 0xFF | OK |
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| 0x38 | 电源键 |
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| 0xA8 | 静音 |
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| 0x88 | 菜单 |
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| 0x28 | 退出 |
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### 3.3 基本操作
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``` c
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ir_select_decoder("nec");
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infrared_read("nec", &infrared_data);
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snake_compare(infrared_data.data.nec.key, infrared_data.data.nec.repeat);
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rt_sprintf(tmp, "%02X", key);
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```
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### 3.4 导致LCD闪烁
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[闪烁展示](https://www.bilibili.com/video/BV1frakeoEbc/?spm_id_from=333.999.0.0)
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[问题解决](https://club.rt-thread.org/ask/article/23706daa8b2e9e55.html)
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## 4. 时间获取，显示
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[参考(https://blog.csdn.net/toopoo/article/details/113665077)](https://blog.csdn.net/toopoo/article/details/113665077)
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``` c
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void greattime()
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{
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time_t cur_time;
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struct tm *info;
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cur_time = ntp_get_time(RT_NULL);
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info=localtime(&cur_time);
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strftime(tmp, 80, "%Y-%m-%d", info);
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lcd_show_string(40, 240/2-32-24, 32, tmp);
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strftime(tmp, 80, "%H:%M:%S", info);
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lcd_show_string(50, 240/2+24, 32, tmp);
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if (cur_time)
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{
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rt_kprintf("NTP Server Time: %s", ctime((const time_t *)&cur_time));
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}
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}
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```
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## 5. 菜单切换
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``` c
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// 菜单（切换页面）
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if (repeat == 0 && (rt_strcmp(tmp, "88") == 0 || rt_strcmp(tmp, "11") == 0))
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{
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page_chosen = (page_chosen % PAGE_MAX) + 1;
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page_first = 1;
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}
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```
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[展示1:51](https://www.bilibili.com/video/BV1VqeceTEts/?spm_id_from=333.999.0.0&vd_source=4ac343050490681bfc3be821b46a4a18)
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## 6. MQTT上传温湿度等数据到云平台
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### 6.1 简单修改
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``` c
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char tmp[];
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rt_sprintf(tmp, "{\"params\":{\"temperature\":%.2f,\"humidity\":%.2f,\"LightLux\":%.2f,\"Psdata\":%d,\"Snakelen\":%d}}", Temp, Humi, brightness, ps_data, snake_len);
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const char *fmt = "/sys/%s/%s/thing/event/property/post";
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char *payload = tmp;
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```
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### 6.2 连接WiFi
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``` c
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rt_wlan_config_autoreconnect(RT_TRUE);
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rt_wlan_connect("Dong", "abcd07691234");
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system("myproject");
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```
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### 6.3 阿里云平台查看数据
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#### 光照强度
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#### 接近感应
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#### 蛇长
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#### 湿度
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#### 温度
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### 6.4 开启关闭MQTT
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``` c
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IOT_MQTT_Destroy(&pclient);
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```
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#### 展望
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LVGL,网页/小程序展示操作
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## 感谢
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RT-Thread和各位导师的指导 |