致敬學長！J20航模遙控器開源項目計劃【開局篇】 | 先作一個開機界面 | MATLAB圖像二值化 | Img2Lcd圖片取模 | OLED顯示圖片

時間 2020-08-21

標籤致敬學長 j20 航模遙控器開源項目計劃開局篇一個開機界面 matlab 圖像 img2lcd img lcd 圖片 oled 顯示欄目快樂工作简体版

原文原文鏈接

咱們的開源宗旨：自由協調開放合做共享git

擁抱開源，豐富國內開源生態，開展多人運動，歡迎加入咱們哈~github

和一羣志同道合的人，作本身所熱愛的事！數組

項目開源地址：https://github.com/Cai-Zi/STM32_RC_Transmitteride

Bilibili帳號：蔡子CaiZi函數

我的主頁：https://space.bilibili.com/349576976性能

1.爲何要用STM32作航模遙控器？Arduino不香嘛？

以前用Arduino Pro Mini製做了一個航模遙控器+接收機，不得不說Arduino開發起來很是方便，可是博主用的開發板比較廉價，芯片資源較少，只能實現基礎功能，遙控性能也不能使人滿意。咱們的經費又不夠來買大幾百的UNO，怎麼辦？我找到了同價位的STM32F103C8T6開發板，十元包郵解君愁！這個小板子於咱們遙控器而言，資源足夠用了，別人甚至拿它來玩平衡車、四旋翼、智能家居，足見其強大！學習

2.爲何要命名爲J20遙控器？

其一，咱們本身DIY的遙控器，固然要用我國之重器-J20來命名！相信若是當年LUOLI大佬開發遙控器時，咱們祖國的J20面世了，他也會用J20來命名本身的遙控器，而不是SU27，每一個人都有本身的民族自豪感，我也同樣！測試

其二，J20的總設計師-楊偉院士，是個人學長！招生宣傳一波哈哈哈哈哈哈，歡迎報考西北工業大學！（招生辦是否是該打錢了）咱們學校真是過低調了，當年報考前我壓根沒據說過西工大，宣傳力度要增強啊。ui

其三，今年是2020年，就說應景不該景！J20中的數字也象徵着咱們的開發時間，獨特的年份，用來命名咱們的遙控器剛恰好~spa

3.爲何要記錄開發製做過程？

博主也是邊學邊作，而且是利用業餘時間（導師：論文看累了，就敲點代碼放鬆一下），實際上很耗費時間和精力啊！把學習過程記錄下來，一是方便加深本身的理解，二是但願能幫到別人叭，三是提供給DIY玩家本身改造的空間，一千我的心中有一千個哈姆雷特，每一個人都有本身的想法，授人以魚不如授人以漁，教程能夠幫助讀者完成本身的個性化設計，好比設計開機界面、添加修改功能。

項目徹底開源，還附帶教程，怎麼樣？上車吧！

開始正文

1. 項目計劃

前天，北斗三號最後一顆全球組網衛星發射成功，實現全球組網。不得不說咱們祖國愈來愈強大了，咱們本身也要更努力才行啊，如今咱們總被漂亮國卡脖子，可是莫欺少年窮！咱們每一個人都爲祖國建設添磚加瓦，早晚祖國會實現偉大復興！

北斗系統建設採用「三步走」戰略-【從無到有-服務亞太-全球組網】，那麼咱們的遙控器也分三步走，先完成基礎版，實現遙控器的基礎功能，再進行升級，添加屏幕界面交互，最後添加更高級人性化的功能。先會爬再會走路最後學會奔跑，這樣看，萬物是否是都相通的？

2. 開機界面製做

侃了這麼多，來開工吧，萬事開頭難，咱們先作一個帥氣的J20開機界面！

（1）修改圖片尺寸

找一張J20圖片，用2345看圖王修改圖片尺寸128像素*64像素（或者比這個範圍小一點），由於咱們的OLED顯示屏只有128*64個像素點，這一步也能夠和第二步一塊兒用程序實現。

（2）圖像二值化

所謂圖像二值化，就是將彩色圖片變成黑白的，咱們的顯示屏單個像素只有亮/暗兩種狀態，對應1/0二值。能夠用MATLAB/Python/Photoshop等來處理成黑白的，這裏我用的是MATLAB，圖片和m文件放在同一文件夾，代碼以下：

 1 close all
 2 clear all
 3 clc
 4 %%
 5 A=imread('j20.jpg');% 輸入圖片
 6 n = graythresh(A);
 7 % D=imbinarize(A,n);
 8 D=im2bw(A,n);
 9 % figure;
10 % imshow(D);
11 imwrite(D,'j20.bmp');% 輸出圖片
12 e=imread('j20.bmp');
13 [m,n] = size(e);
14 img = zeros(m,n);
15 fd=[m,n,3];%設置空白圖片矩陣
16 f=uint8 (round (fd*255)); %轉換爲RGB值
17 bg=255;%灰色背景51
18 for i=1:1:m
19    for j=1:1:n
20        if (e(i,j)<=200)
21            f(i,j,1)=91;
22            f(i,j,2)=155;
23            f(i,j,3)=213;
24        else
25            f(i,j,1)=255;
26            f(i,j,2)=255;
27            f(i,j,3)=255;
28        end
29    end
30 end
31 % figure;
32 % imshow(f);
33 % sa=imcrop(f,[0,0,140,140]);%裁剪[左上角起始位置x,y,裁剪寬,高]
34 % imwrite(f,'j20.png');

生成j20.bmp後，有一些不滿意的地方，接下來咱們拿PS來修一下。

花費一點時間，把邊邊角角清理乾淨，把線條補充上，再加個J-20文字，最後保存成bmp文件。

（3）Img2Lcd圖片轉數組

打開剛纔修好的bmp圖片，按以下四步操做，保存數組。若是發現顯示不對，能夠嘗試改變圖中設置，若是你不想搞懂OLED顯示原理，那麼一個一個試就能夠了。掃描模式（4種選項）和6個選項欄（勾選/不勾選），最多4*2^6=256次，我比較幸運，只試了10次。

奉上我作好的兩個數組，建議給咱們的UI設計師加雞腿！最後一張太好看了叭！

  1 unsigned char J20logo[] =
  2 {
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 67 };
 68  
 69 unsigned char J20logoR[]=
 70 {
 71 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
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135 };

圖片取模數組代碼

（4）圖片顯示程序

首先聲明數組是全局變量，再在循環中調用顯示函數。

 1 /*
 2 =============菜單顯示==============
 3     芯片STM32F103C8T6，先作一個J20開機界面
 4     OLED顯示屏：
 5                 GND   電源地
 6                 VCC   接3.3v電源
 7                 SCL   接PB8（SCL）
 8                 SDA   接PB9（SDA）
 9     串口USB-TTL接法：    
10                 GND   電源地
11                 3V3   接3.3v
12                 TXD   接PB7
13                 RXD   接PB6
14     ST-LINK V2接法：
15                 GND   電源地
16                 3V3   接3.3v
17                 SWCLK 接DCLK
18                 SWDIO 接DIO
19     by Bilibili 蔡子CaiZi
20 */
21 #include "config.h"
22 #include "delay.h"
23 #include "usart.h"
24 #include "stm32f10x.h"
25 #include "oled.h"
26 #include "rtc.h" 
27 #include "stdio.h"
28 #include "string.h"
29 extern unsigned char J20logo[];
30 extern unsigned char J20logoR[];
31 extern unsigned char BMP1[];
32 int main()
33 {
34 //    u8 txt[16]={0};
35     delay_init();//初始化延時函數
36     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //設置NVIC中斷分組2，2位搶佔優先級和2位子優先級
37     usart_init(115200);//初始化串口1，波特率爲115200
38 //    TIM3_PWM_Init(19999,71);//預分頻72，頻率1MHz，週期1us；自動裝載值20 000，故PWM週期1us*20 000
39 //    TIM2_Init(499,71);//1MHz，每500us採集一次；可設置9us以上，但太小影響OLED顯示
40 //    DMA1_Init();    //DMA初始化
41 //    GPIOA_Init();    //PA初始化
42 //    Adc_Init();        //ADC初始化
43 //    RTC_Init();          //RTC初始化
44     OLED_Init();    //初始化OLED  
45     OLED_Clear();
46     OLED_Refresh_Gram();
47     while (1){
48 //        itoa(PWM1value,txt,10);//將int類型轉換成10進制字符串
49 //        printf("採樣值：%d\t舵量：%s\t",ch1Value,txt);
50 //        printf("當前時間：%d:%d:%d\n",calendar.hour,calendar.min,calendar.sec);
51 //        //OLED_Clear();//一直清屏會形成閃爍
52 //        strcat(txt," us");//合併字符串
53 //        OLED_ShowString(6,3,txt,24); //位置6,3；字符大小24*24點陣
54         OLED_DrawBMP(0,0,128,8,J20logo);
55 //        OLED_DrawBMP(0,0,128,8,BMP1);
56         //OLED_ShowString(6,3,"CaiZi",24); //位置6,3；字符大小24*24點陣
57         //OLED_Refresh_Gram();
58         delay_ms(500);
59     }
60 }

完整的工程文件已上傳天翼雲盤：

https://cloud.189.cn/t/rYZzQ3yIbIrm（訪問碼：5eju）

項目宣傳視頻

https://www.bilibili.com/video/BV1Vg4y1v7oQ

寫在最後：

若是你手上有廢棄的遙控器，有吃灰的開發板，有9塊9包郵的烙鐵或者焊臺，歡迎加入咱們，一塊兒來感覺DIY的樂趣；

若是你是一個技術小白，擁有一腔熱血卻很迷茫，歡迎加入咱們，雖然這裏除了知識和快樂，其餘什麼都沒有；

不管你是入坑菜鳥仍是航模老鳥，只要你有一顆熱愛的心，來自五湖四海，咱們都期待你的加入！

咱們期待聽到不一樣的聲音，但願獲得更多人的反饋，幫助咱們來研發和測試~

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開源團隊現有成員：（持續更新）

蔡子CaiZi（B站up主）   - STM32開發
A-XIN（模友） - STM32開發
小何（模友）    - PCB設計
ZL_Studio（B站up主）   - C51開發
王每天（舍友）        - STM32開發
劉桶桶（模友）          - PCB設計
簡繁（模友）         - UI設計
王博（模友）         - STM32開發
與非門（模友）          - STM32開發
Talons（模友） - STM32開發
大米粥（模友） - 結構設計
P a S S ||（模友） - STM32開發