标题: 【PIC32 starter kit】之性能初窥 [打印本页] 作者: duzy 时间: 2016-4-7 11:42 标题: 【PIC32 starter kit】之性能初窥 板载资源介绍 1 `* O8 R) @* y/ t; N一．正面： 5 ]; ~. C7 d' T) h3 \# F8 n# {9 W官方原文指导： a: [3 I# p6 o/ x' I2 C/ w' x
The top assembly of the board includes these key features, as indicated in Figure 1-1: . r5 f$ ?* L; _, Z$ F! Z: v9 ^1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西9 s* d7 N' @- n5 w* \5 _% S2 }
2. Green power indicator LED (D4). 电源指示灯4 D+ T+ D+ l H- `+ p' d0 u. c
3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振 ; B9 k, q0 s. F' L! S4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG ; i2 t# K2 T3 j2 u) Y% d5. Debug indicator LED (D7). Debug指示灯 : R+ b, r+ g9 V) `4 w6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入! C7 K% U, r; D, D% ^' X
7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯 , e" {% W/ h5 q _7 b8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用- b+ q' E/ `+ u2 f9 _) e
9. HOST mode power jumper (J5). 电源模式跳线6 x8 C0 v# j1 F4 L
10. LAN8740A PHY Daughter Board headers (J2) 这个拿到板的人一看就明白,网络连接接口 ) R% W' \0 n2 ~8 `9 V9 V+ @11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容 0 ~1 X2 ]+ C! n! J
12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振( B% h M" j' n; _7 }: _) I
13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。 }' W6 d' c/ f二．反面： D+ l- A0 d2 c1. Regulated +3.3V power supply for powering the starter kit through USB or7 \" Y8 |4 [& C$ k
expansion board (U8). 3.3V的电源支撑, w+ d, V( O" j& D- S* A
2.Connector for various expansion boards (J1). 扩展板连接器 4 V( [. b8 e+ f3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 0 B2 M; [0 y6 [' C P) g- ]: BOTG/device-based applications (J3). OTG,micro-USB连接器 / _! A" g) E) S4 I7 `! h4 U. `4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。 1 F }3 [ V' c3 d8 n9 l' [基本情况就介绍到这儿，这个板子本身所带的资源及信息。 ' X0 B) `6 N& f2 l+ W/ [" G0 e4 ~ ( E4 t+ A; M. v+ P' Y
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三．性能及相关参数（捡主要的） + x0 w+ b, c* H8 d3.1 power supply ( u1 d1 n4 P/ Y$ m/ t0 U• USB bus power connected to USB debug connector, J7.USB_debug连接器提供3 O5 ?' V% o. p9 C( ?8 f
• An external application board with a regulated DC power supply that provides +5V J1也就是板子背面最大的那个接扩展板的接口接供，暂不满足。, a$ p# F* U0 C% j" w
can be connected to the J1 application board connector that is provided on the bottom side of the board.! `0 c0 z2 l; p, G( f
3.2 PIC32 USB Connectivity（USB连接） & Y! S5 C: s p& G) QUSB连接有3种模式，像大家最常用U盘，接到PC上，这种U盘就属于DEVICE MODE，PC就属于HOST MODE这种是大家最常用到的，+ W7 y T: Q" H# l9 G2 ~
还有一种是OTG模式，8 B; e+ @) \5 }! M7 B% J: w% T
•HOST Mode – Connect the device to the Type A connector J4, located on the top side of the starter kit. If using the Debug USB port to power the Host port, install1 \* ?, D- W6 i) E5 ^- R- d/ h$ W
jumper J5 to short the back-power prevention diode. Note that a maximum of ~400 mA can be supplied from the Debug USB port to the Host port using this method./ }2 K9 t$ ~; B5 l; U
如果想要使用USB主机模式，那么必需就要接到J4上，也就是那个我们最常见的USB口上，如果是用MICRO-USB供电，则需要短接J5,也就是我们* e7 _0 l$ n. b% C) [+ d3 w: Z
在面板上看到的那两个排针。- K- J1 t D# o h7 \
•DEVICE Mode – Connect the debug mini-B USB cable to port J7 and then connect the starter kit to the host using a cable with a Type-B micro-plug to the starter) V) H( Q3 d, l8 X: E9 {7 ]
kit’s micro-A/B port J3, located on the bottom side of the starter kit. The other end of the cable must have a Type-A plug. Connect it to a USB host. Jumper J5 should' N: F# L5 w! ?( A
be removed.7 G( m' K+ d) `, ]7 _
DEBUG口，即是设备模式，但是需要将j7,跟J3都连接到电脑，J5也就是那个跳线需要断开。' x9 W0 l7 P- \' V* {( t
•OTG Mode – Connect the starter kit to the OTG device using an OTG micro-A/B cable to the micro-A/B port J3, located on the bottom side of the starter kit. The: i* g0 ^4 l ?. d$ A1 r
starter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should; z" u8 @. Z! Z* b7 `4 _
be removed.' n0 a& d/ g5 A3 ?
只需要连接J3,但J5跳线要断开。作者: helendcany 时间: 2016-4-7 15:10
哦，哦，哦，这个要记……作者: Haiting32451 时间: 2016-4-19 09:24
学习了……