WhyCan Forum(哇酷开发者社区)

OggyJFX 说：

大家一起搞

LittleVGL_qt_T9_.7z

https://whycan.cn/files/members/1681/lvgl.png

支持ttf矢量字体吗

这个我已经入坑好久了，先说说吧，板子上设计有些不合理，首先反复按复位键，LCD会花屏，这个LCD的电源控制有关系。
自己飞了根线，加了个MOS管，用一个IO控制LCD电源，这也上电先关闭LCD电源，然后LCD上电初始化，就不会有花屏了。

另外自己把PA14、PA15接了出来，终于可以Jlink调试了

由于没有TF卡的例程，TF卡文件读写还是玩不了。

我这边源代码后缀是cpp但是不用cpp的特征, 仅仅是为了vscode不会报错, 编译的时候是写脚本把文件后缀从cpp改成c, 最后通过脚本调用Keil提供的C51工具链在命令行进行编译, vscode默认下面有终端所以基本编译都是上箭头+回车就可以解决.
通过脚本调用C51工具链, 顺序是C51编译器, A51汇编器, lx51链接器, OHx51文件转换器, 这四个程序的命令行使用方法可以在http://www.keil.com/c51里面查到.
附件是我自己用的脚本, 程序用python 3.6.3验证过了, 有一个KEILPATH变量需要自行修改, 可能要使用pip install click, 用于解析命令行参数.
附件: buildC51_py.zip

opengl/directx 了解一下，只要给一组参数调用函数就可以渲染出来，protel99应该是软件渲染的，速度非常慢，后来的dxp速度很快了。

这是要笑死我然后继承我的花呗账单？

...

渲染效果真酷，usb可以考虑叠一个micro usb座子就更完美了。

Linux代码备份太容易了， 用git就好，天生的云备份，随便你推送到哪个git服务器，或者本地硬盘。

遇到这种人，你们还上杆子回答他的问题，要我说，对于中国友好的国际友人帮帮得了，这种诋毁中国的外国人一句话也不搭理他，管他的闲事，你们就是太闲了

But, from what I understand, initially the Chinese government cover the cases

...

个人感觉还行, 主要是方便, 家里搞完到办公室继续玩, 手机也可以ssh操控, 不用担心断网连不上的问题.

带背胶的泡棉垫片吧，粘在接插件翻盖上，泡棉上面应该顶住外壳，压住翻盖。

这个没有人研究的呀，都是买回去垫桌脚？

对，老板和口罩都是稀缺资源，我朋友以前就是帮前东家送货的，后来公司倒闭，顺利"继承"了前东家的客户，委托前东家的供应商供货，几乎完美白手起家。

@OggyJFX, People pay some times with money that are very hardly earned and expect good products, services and proper financial return. If you do not value and have respect to customers, developers … there are other that do.

I would like to show you one board I recently made. It is modified version of ESP32Controller (https://github.com/simon-jouet/ESP32Controller) for 3D printer/CNC control.

https://whycan.cn/files/members/667/ESP32Controller1.jpg

Some can say a Chinese product, except that it was developed by French developers and modified and assembled in Bulgaria. Still the Marlin and ESP3D software support are incomplete, have lots of issues etc. But for open-source work a developer doesn’t get paid, so the developers are not much willing to look at the issues. Potentially the product developers, have to provide some PCBs … for free to other developers etc. Some say that have no intentions about developing something that has poor software quality SDK, availability issues etc. When I ask a Chinese company about free samples, they usually say - no such things in China. On the other hand, let say I invest in this board … who is going to guarantee that some Chinese will not copy the product, dump the price and I will not loose my investments. There are already Chinese copies of DuetWiFi boards (www.duet3d.com) ? Still, the board was developed. In your opinion should it be thrown away ?

By the way I was considering Hi3516EV200 for such usage, but more and more I read your comments, get convinced that I should not deal with Chinese products at all etc.

@nothing, Is there Hi3516EV200 SDK in English, the versions I was able to find so far are in Chinese.

I got one board from zhenfanhei with  Hi3516EV200 , but when connect the USB in upload mode, it keeps reseting. Not sure what the issue might be ?

https://whycan.cn/files/members/667/Hi3516EV200.jpg

无法关机，我拆了，

就是用 ctrl + l 的吧

这个方法好！我原先以为这个EEPROM是FPGA的配置，一时没想到是FX2的。
LA4016我看了，原模原样抄的DSLogic Plus，外面套了一个公模的金属壳，声称【不仅与上位机软件DSView永久同步，LA4016比DSlogic具备更高性能价格比】，太low了。

@k455619:科普下：故意用激烈的言辞引起别人进行没有意义的争论的行为

@OggyJFX, Apparently some of the Chinese are. I received the package after 2 months of delay. I had financial loses, replacement and substitute items were purchased from other places etc. And the ship-forwarding company demands payment. In China haven’t you heard about COMPENSATIONS ... ?
Everyone wants to hear just good things, but the Chinese ship-forwarding companies services are horrible. I had to inquire various authorities regarding this matter, spending much time and resources etc.

....

手册写多少 uA ?

union它不香吗
用匿名union可以用多种方式访问同一地址，形式也很简洁。像USB Request就很适合用这种表达方式。

typedef __packed struct _REQUEST_TYPE {
    U8 Recipient : 5;                     /* D4..0: Recipient */
    U8 Type      : 2;                     /* D6..5: Type */
    U8 Dir       : 1;                     /* D7:    Data Phase Txsfer Direction */
} REQUEST_TYPE;
typedef __packed struct _USB_SETUP_PACKET {
    REQUEST_TYPE bmRequestType;           /* bmRequestType */
    U8  bRequest;                         /* bRequest */
    __packed union {
        U16        wValue;                  /* wValue */
        __packed struct {
            U8         wValueL;
            U8         wValueH;
        };
    };
    __packed union {
        U16        wIndex;                  /* wIndex */
        __packed struct {
            U8         wIndexL;
            U8         wIndexH;
        };
    };
    U16          wLength;                 /* wLength */
} USB_SETUP_PACKET;

#ifndef __VS_CODE_H__
#define __VS_CODE_H__
#ifdef VSCODE
    #define _nop_() (void*)0;
    #define interrupt(x)
    #define using(x)
    #include <stdbool.h>
    #include <stdint.h>
    typedef bool bit;
    class sfr{
    public:
        sfr(int){};
        sfr(){};
        ~sfr(){};
        bool operator ^ (uint16_t data);
        bool operator ^ (int data);
        sfr& operator=(const sfr& other);
        sfr& operator=(const int other);
        int operator ^= (int data);
        int operator &= (int data);
        int operator |= (int data);
        int operator | (int data);
        int operator & (int data);
        operator int(){};
    };
    #define sbit bool
#else
    #define interrupt(x) interrupt x
    #define using(x) using x
#endif
#endif

@cityf, Quite agree. Still, there is this package that is held in China. It has items that I paid for: 3204.27 CNY. In addition, I paid about 150 USD shipping fess . Please refund my money !

https://github.com/CHERTS/esp8266-devkit/blob/master/Espressif/ESP8266_RTOS_SDK/third_party/freertos/heap_4.c

这个 heap_4.c 也实现了 pvPortCalloc  pvPortRealloc

字体小的时候，有些时候，上对齐或者下对齐都不大好看         //居中对齐         copy_bitmap(sbit->buffer, sbit->width, sbit->height, sbit->left,                     (lv_font_ttf.h_px - sbit->height)>>1,                     sbit->xadvance);这样会好看很多