查看: 3199|回复: 2

Teensy 3.2 with Chinese version USB HOST MINI

[复制链接]

该用户从未签到

发表于 2018-8-25 15:17 | 显示全部楼层 |阅读模式
I have brought a USB HOST Mini a few years ago. It’s really cheap (29.5 Yuan/$4.6964). But there is no document for it and very hard to use. And I began to study it this month. At last, I make a covert board for it. You can use it with Teensy 3.2.
Before start, we should know below things:
1.        All the pins use on this USB Host Mini is 3.3V, it can be connected to Teensy directly(and don’t do it on your Arduino Micro Pro which is 5v)
2.        You should know the difference between original board [pic1] and Chinese version[pic2], I have marked in red and green cycles. I think that’s the only difference between them.
image001.png
Pic1
image002.gif
Pic2

3.        Before using the USB Host Shield you have to make some rework on it.
3.1 cut the wire in the red circle. Reason:it’s the power pin for USB device. And if we don’t cut it, the USB device will only get 3.3v. We cut the wire and send 5V power from outside(green in the below picture)
image003.png
3.2        Connect the reset pin directly to the 3.3v pin. In this way, reset pin is always high.
image004.gif

4.        The pin on this board is as below. DON’T trust the pins naming on backward board side[ref:1]
5.        I think there is something wrong with SPI4Teensy Library. Please make changes in \libraries\USB_Host_Shield_2.0-master\settings.h  to disable SPI4Teensy Lib
#if defined(CORE_TEENSY) && defined(KINETISK)
//move this #define USING_SPI4TEENSY3 USE_SPI4TEENSY3
#else
#define USING_SPI4TEENSY3 0
#endif
//Add++
#define USING_SPI4TEENSY3 0
//Add++

I have make a simple table for Teensy to UHS connections. You can connect them directly.
Teensy        UHS       
GND        GND       
D13        SCK       
D12        MISO       
D11        MOSI       
D10        SS       
D9          INT       
VIN         5V        It’s for USB device.
3.3V         MAX_RST        As you can see, I have connect 3.3V to the MAX_RST on the board, but I don’t know why it’s not work (too thin?). That’s the reason why you should make 3.2 rework.
PCB:
image006.gif
Schematic:
image007.gif

Note:as you can see, I have connected the Reset Pin of UHS to 3.3V, but I don’t know why UHS doesn’t. But after I connect theses pin with a wire, it works well.
image009.png
Teensy is much faster than Adruino.


image008.gif
image010.png
image005.png

该用户从未签到

 楼主| 发表于 2018-8-25 15:25 | 显示全部楼层
USBHOST2Teensy.zip (112.65 KB, 下载次数: 7)
  • TA的每日心情
    开心
    2019-9-18 00:08
  • 签到天数: 2 天

    [LV.1]初来乍到

    发表于 2018-10-10 22:54 | 显示全部楼层
    that is great.
    i also have one.
    we can chat more via my emal 15339875231@163.com
    您需要登录后才可以回帖 登录 | 立即注册

    本版积分规则

    热门推荐

    [限时福利]5分钟带你快速了解新一代开发板:M5STACK
    [限时福利]5分钟带你快速
    一、什么是M5Stack M5Stack是一种模块化、可堆叠扩展的开发板,每个模块
    Arduino使用电阻分压测量电池电压问题
    Arduino使用电阻分压测量
    请教,下图中的连接有什么问题,如何调整? 让只有一块电池的条件下,解决测量电压不
    上传一个蓝牙串口助手,安卓版的
    上传一个蓝牙串口助手,安
    /* 本软件为蓝牙串口通讯工具,可与蓝牙模块(如:HC-05)建立连接,进行串口通讯,可
    蓝牙串口助手 1.3 beta 1测试版
    蓝牙串口助手 1.3 beta 1
    在之前版本的基础上增加了视觉相关功能: 颜色跟踪模式及人脸跟踪模式, 增加了发
    萌新跪求arduinoUNO板对接无线模块(如何接和程序)
    萌新跪求arduinoUNO板对接
    哪位dalao能帮帮我啊???急!!! (提供有偿服务可加我QQ3285396460)
    Copyright   ©2015-2016  Arduino中文社区  Powered by©Discuz!   
    快速回复 返回顶部 返回列表