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 6 y% J+ ^: U' j# q: g! \一．正面：. p) T4 N+ l9 ?. ?
官方原文指导：. |! l, {3 ~" I7 r2 n
The top assembly of the board includes these key features, as indicated in Figure 1-1: 1 C7 r- g& ^0 l2 f% z1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西 8 F8 x5 f) x! l2. Green power indicator LED (D4). 电源指示灯 m5 d7 Z7 y G$ U" Z& \) b3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振 ' A% h, ^5 T2 x+ _ X# c; \4 q: t, _4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG 6 j4 l( f% G* y, [+ p) o5. Debug indicator LED (D7). Debug指示灯 % M# E d/ ~# W9 o6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入& q7 I7 i0 @% w+ Q% Z
7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯! I" t+ b1 i- R8 f& s' Y
8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用 ' I. f, O0 ] l9. HOST mode power jumper (J5). 电源模式跳线4 S9 R, _& y5 O8 u# r
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5 |8 V6 j& j3 n3 [- \, k1 u
11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容 ( }& y7 }+ l$ B* [: k# K
12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振$ U/ o5 G4 V5 W: E$ w8 L4 k
13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。 5 _: T/ M |8 A: @5 @! a& f二．反面： % _. {. P+ I5 O( ?' ?' U1. Regulated +3.3V power supply for powering the starter kit through USB or ! { e7 c" m# M: qexpansion board (U8). 3.3V的电源支撑9 o. C; `6 @- q$ K4 {+ Y
2.Connector for various expansion boards (J1). 扩展板连接器$ M9 T6 N$ ]7 t
3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 * J# M, u, V/ Y3 ?. bOTG/device-based applications (J3). OTG,micro-USB连接器 0 r: p) e7 j7 j" l. G3 Y4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。 6 C# X- ?1 C, {# z) D9 C' y基本情况就介绍到这儿，这个板子本身所带的资源及信息。/ M7 b: l; L/ G- E
! r2 W4 v; c$ w8 B" G Z% a2 Q6 M1 x
======================================================================================================= 1 d9 F# I: @+ @9 F% a0 \三．性能及相关参数（捡主要的）& F% Z6 x" I5 p5 C3 Z5 w8 R$ g+ J
3.1 power supply" W9 R" s- B$ Z2 B4 u
• USB bus power connected to USB debug connector, J7.USB_debug连接器提供4 U: { A/ h# P5 _
• 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。% o9 l+ z' R* _) G9 U+ w7 ?
can be connected to the J1 application board connector that is provided on the bottom side of the board. ( S* R6 k! j! x1 m- y$ w) M4 ~. o& B$ C3.2 PIC32 USB Connectivity（USB连接）! X- E! C5 N( d. X" ~* c) E. {
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， 7 _( \/ h/ ^# b! n# f# p还有一种是OTG模式， 7 [9 v4 J) P" d•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 # Y7 `9 }8 J# Ijumper 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. 5 `! u- d! {% \: [* i! b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# \& |1 l" z0 n; O+ a
在面板上看到的那两个排针。( I% h- |7 t- _$ X
•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& N$ c# t L. k5 g. F1 w4 H
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 - r8 i5 @ R7 ?; abe removed. D5 ]5 h) j! f8 R7 ^4 [5 G
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。, Q0 v% n7 d# R6 A/ Q9 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 & |: P$ S# F5 {. wstarter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should2 D& K* U$ B' O# N( W: h2 d! g
be removed. 7 O0 p8 v- z6 Z' P, r6 \1 p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……