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$ O) S! b" h1 d% Z' l* \; M
一．正面：; p- N% t- N. u4 S5 O# S
官方原文指导： 7 J8 l: }! Q2 WThe top assembly of the board includes these key features, as indicated in Figure 1-1:7 Z2 [* a: c+ [5 {+ r& |6 C' O/ t
1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西4 |9 m+ v8 V- P$ G/ V
2. Green power indicator LED (D4). 电源指示灯. A& ^) \" g4 S: g
3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振 + z! u' }) n# q& u4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG* O* |! {, f2 v9 o$ B
5. Debug indicator LED (D7). Debug指示灯 3 r) d% d3 w4 o9 C G5 H2 T6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入* S8 |& c# L+ U! f8 [
7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯 6 s) u! K% g8 F7 V2 G4 r6 e3 Y8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用 V0 c8 P: C8 V: z, ^. t2 a2 D
9. HOST mode power jumper (J5). 电源模式跳线 ! ? \5 D" b) h; Q3 q+ i% ` |" N10. LAN8740A PHY Daughter Board headers (J2) 这个拿到板的人一看就明白,网络连接接口 [& ]5 @5 q5 q8 n8 {+ m11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容 1 ^( c* D( H4 @8 y% v
12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振 9 n. y5 N5 H: M8 v, p3 }+ h13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。 1 i# h0 `+ W+ H# D1 L8 ~4 i; t. T二．反面：) ^1 Y i" i6 V# s
1. Regulated +3.3V power supply for powering the starter kit through USB or ) m$ O i- N# d" Q: N' oexpansion board (U8). 3.3V的电源支撑 ~" B% T+ m% t2.Connector for various expansion boards (J1). 扩展板连接器 1 W0 o7 }) u8 K+ Z7 a; y( @3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 1 N# q, c- p: f4 a- C7 V7 B9 YOTG/device-based applications (J3). OTG,micro-USB连接器 0 e' L3 T" j$ {" Q' j4 w4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。 9 \4 H+ K- Y- A8 A1 \) G* |基本情况就介绍到这儿，这个板子本身所带的资源及信息。& h; l6 V) B3 D% l6 Y/ h/ j
( F: \4 F6 C: g9 @======================================================================================================= 3 M, S) ~. W8 X( Z$ E三．性能及相关参数（捡主要的） $ w$ v5 `+ E( ^; w3.1 power supply' I H5 ?, e5 ?: k @! Q# X4 w- J7 v
• USB bus power connected to USB debug connector, J7.USB_debug连接器提供 $ i9 E( o" ~9 I6 F- @0 s• 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。 4 p, Y% ^6 Q* C, }# m# Ican be connected to the J1 application board connector that is provided on the bottom side of the board.- ?7 f5 s8 l* E
3.2 PIC32 USB Connectivity（USB连接）0 A/ p* `1 W$ A! s; C! g# h5 f5 U; _" T
USB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，5 }# m, D* Z2 ^! t, y
还有一种是OTG模式， 1 S' s, m5 J* {1 J•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, install: K, ^$ V+ @- K; W& D' B
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.. Z/ C s w, u# Y$ L
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 $ y+ [+ k& ^- \/ o- }在面板上看到的那两个排针。 ( S6 a% m% P! R•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 % r5 G) p8 c& x/ d- {9 Tkit’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! {+ r6 O) ?! L/ T5 R* M& A- O
be removed. ! H% _# S5 M( Z3 D4 m0 GDEBUG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。& j( b" d% O) b4 L2 W" [3 Z
•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# k( R' b- P. ?! J% F& v3 i
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 6 N4 E; G& |; ibe removed.; P* `) r- ^+ Q6 w( F8 {1 u: Z
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……