1 ******************** (C) COPYRIGHT 2010 NXPSemiconductors *******************
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2 * @file USBDEV\USBCDC\abstract.txt
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3 * @author NXP MCU SW Application Team
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6 * @brief Description of the USBDEV CDC example.
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7 ******************************************************************************
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8 * Software that is described herein is for illustrative purposes only
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9 * which provides customers with programming information regarding the
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10 * products. This software is supplied "AS IS" without any warranties.
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11 * NXP Semiconductors assumes no responsibility or liability for the
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12 * use of the software, conveys no license or title under any patent,
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13 * copyright, or mask work right to the product. NXP Semiconductors
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14 * reserves the right to make changes in the software without
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15 * notification. NXP Semiconductors also make no representation or
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16 * warranty that such application will be suitable for the specified
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17 * use without further testing or modification.
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18 ******************************************************************************
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20 @Example description:
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22 This example describes how to use USBDEV on LPC1768 to demo the virtual COM port.
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27 - processor clock = CCLK = 100 MHz
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28 - USB clock = 48 MHz
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29 - CCLK / 4 clock = 25 MHz
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31 The PC will install a virtual COM port on the PC (see Driver Installation).
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32 After installation an additional port "LPC17xx USB VCom Port(COMx)"
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33 can be found under System/Hardware/Device Manager/Ports(COM&LPT).
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34 Number "x" is not fixed as different PC configuration may have different
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35 "x" displayed on the device manager. The USB host driver assigns "x"
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36 dynamically based on the existing COM port configuration of the system.
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38 Testing the USB Virtual COM port with serial cable:
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40 Open two Hyperterminal windows.
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41 One with "LPC17xx USB VCom Port(COMx)"
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42 One with "Communications Port (COM1)".
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43 Connect PC port COM1 to the comport on the board and open "COM1"
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44 and "COMx". Data from COM1 will be echoed on "COMx" and visa versa.
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45 So, this is bi-directional communication between the physical COM
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46 port 0 or 1 on the board and the virtual COM port COMx on host PC.
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47 By default, COM PORT1 on the board is used for VirtualCOM port test.
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48 In order to use COM PORT0 on the board, modify the definition PORT_NUM
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49 from 1 to 0 in serial.h, recompile and reprogram the flash. RST jumper
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50 needs to removed to start the Virtual COM port test.
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52 @Driver Installation:
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53 "Welcome to the Found New Hardware Wizard" appears
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54 - select 'No, not this time'
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57 - select 'Install from a list or specific location (Advanced)'
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60 - select 'Search for the best driver in these locations'
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61 - check 'include this location in the serach'
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62 - set to <project folder>
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65 "Hardware Installation" appears
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66 "has not passed Windows Logo testing..."
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67 - press 'Continue Anyway'
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69 "Completing the Found New Hardware Wizard" appears
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72 @Directory contents:
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73 \EWARM: includes EWARM (IAR) project and configuration files
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74 \Keil: includes RVMDK (Keil)project and configuration files
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76 cdc.h: USB CDC (Communication Device) Definitions
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77 cdcuser.h/.c: USB Communication Device Class User module
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78 lpc17xx_libcfg.h: Library configuration file - include needed driver library for this example
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79 serial.h/.c: serial port handling for LPC17xx
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80 usb.h: USB Definitions
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81 usbcfg.h: USB Custom Configuration
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82 usbcore.h/.c: USB Core Module
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83 usbdesc.h/.c: USB Descriptors
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84 usbhw.h/.c: SB Hardware Layer Module
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85 usbreg.h: USB Hardware Layer Definitions for NXP Semiconductors LPC
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86 usbuser.h/.c: USB Custom User Module
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87 vcomdemo.h/.c: main program
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88 makefile: Example's makefile (to build with GNU toolchain)
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89 lpc17xx-vom.inf: driver info for VCOM LPC17xx (used when Windows requires install driver)
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92 Hardware configuration:
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93 This example was tested only on:
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94 Keil MCB1700 with LPC1768 vers.1
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95 These jumpers must be configured as following:
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103 - Remain jumpers: OFF
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106 This example can run on RAM/ROM mode.
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108 Note: If want to burn hex file to board by using Flash Magic, these jumpers need
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110 - MCB1700 with LPC1768 ver.1:
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113 - IAR LPC1768 KickStart vers.A:
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117 (Please reference "LPC1000 Software Development Toolchain" - chapter 4 "Creating and working with
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118 LPC1000CMSIS project" for more information)
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121 - Step 1: Build example.
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122 - Step 2: Burn hex file into board (if run on ROM mode)
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123 - Step 3: Configure hardware as above instruction
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124 - Step 4: Hit reset button to run example. (install driver if required)
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125 - Step 5: After see UGL(USB Good Link) led on board turn on, open Device Manager > Ports (COM & LPT)
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126 see if "LPC17xx USB Vcom Port (COMx)" appears or not.
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127 - Step 6: Open one HyperTerminal for COM1 and other for COMx with below configuration:
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132 - None flow control
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133 - Step 7: Sure that you already connected COM1 port on board with PC. Type any character on
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134 one HyperTerminal screen and see this character will be echoed in other screen and vice versa
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136 (Pls see "LPC17xx Example Description" document - chapter "Examples > USBDEV > USBCDC"
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140 - Open \EWARM\*.eww project file to run example on IAR
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141 - Open \RVMDK\*.uvproj project file to run example on Keil