UART串口作为最为常用的工业设备接口之一被广泛且大量的应用，本文就基于Toradex ARM平台设备为例介绍WinCE下UART配置。
我们采用Colibri ARM核心板产品搭配Colibri开发板来进行测试，OS为Toradex官方发布的最新版WinCE，其中Colibri系列默认定义了三个串口，UART A, UART B和UART C，其中UART A用作调试串口使用，下面就分别针对不同SoC产品进行说明。
1).基于NXP i.MX6Solo/DualLite的Colibri i.MX6产品
系统默认定义COM 1 – UART A (调试串口，全功能)；COM 2 – UART B (支持Flow control)；COM 3 – UART C；另外还支持额外的两个串口UART D和UART E，默认没有使能；所有串口默认均为DTE模式。
./使能UART D方法，请在注册表中添加下面内容并保存
[HKEY_LOCAL_MACHINEDriversBuiltInCOM4]
"Order"=dword:00000002
"IoLen"=dword:000000d4
"IoBase"=dword:021f0000
"Index"=dword:00000004
"DeviceArrayIndex"=dword:00000003
"Prefix"="COM"
"Dll"="csp_serial.dll"
[HKEY_LOCAL_MACHINEDriversBuiltInCOM4Unimodem]
"DevConfig"=hex:10,00,00,00,05,00,00,00,10,01,00,00,00,4B,00,00,00,00,08,00,00,00,00,00,00
"DeviceType"=dword:00000000
"Tsp"="Unimodem.dll"
"FriendlyName"="COM4 UNIMODEM"
[HKEY_LOCAL_MACHINEDriversBuiltInCOM4Pinout_Default]
"colibripin_165"="altfn=3"
"colibripin_167"="altfn=3"
./使能UART E方法，请在注册表中添加下面内容并保存
[HKEY_LOCAL_MACHINEDriversBuiltInCOM5]
"Order"=dword:00000002
"IoLen"=dword:000000d4
"IoBase"=dword:021f4000
"Index"=dword:00000005
"DeviceArrayIndex"=dword:00000004
"Prefix"="COM"
"Dll"="csp_serial.dll"
[HKEY_LOCAL_MACHINEDriversBuiltInCOM5Unimodem]
"DevConfig"=hex:10,00,00,00,05,00,00,00,10,01,00,00,00,4B,00,00,00,00,08,00,00,00,00,00,00
"DeviceType"=dword:00000000
"Tsp"="Unimodem.dll"
"FriendlyName"="COM5 UNIMODEM"
[HKEY_LOCAL_MACHINEDriversBuiltInCOM5Pinout_Default]
"colibripin_169"="altfn=3"
"colibripin_171"="altfn=3"
2).基于NXP Vybrid的Colibri VF50/VF61产品
系统默认定义COM 1 – UART A (调试串口，全功能控制引脚需使用GPIO)；COM 2 – UART B (支持Flow control)；COM 3 – UART C；另外还支持额外的两个串口UART D和UART E，默认没有使能。
./使能UART D方法，请在注册表中添加下面内容并保存
[HKEY_LOCAL_MACHINEDriversBuiltInUARTD]
"DeviceArrayIndex"=dword:00000003
"Index"=dword:00000004
"Prefix"="COM"
"Dll"="vybrid_serial.dll"
"Order"=dword:00000001
"TXPIN"=dword:00000017
"TXAF"=dword:00000006
"RXPIN"=dword:0000001f
"RXAF"=dword:00000006
./使能UART E方法，由于管脚和Colibir默认定义的SDHC接口冲突，因此需先关闭SDHC功能，请在注册表中修改下面内容并保存
[HKEY_LOCAL_MACHINEDriversBuiltInESDHC]
"Dll"="_esdhc.dll"
[HKEY_LOCAL_MACHINEDriversBuiltInUARTE]
"DeviceArrayIndex"=dword:00000004
"Index"=dword:00000005
"Prefix"="COM"
"Dll"="vybrid_serial.dll"
"Order"=dword:00000001
"TXPIN"=dword:00000033
"TXAF"=dword:00000004
"RXPIN"=dword:00000035
"RXAF"=dword:00000004
3).基于nVidia Tegra的Colibri T20/T30产品
系统默认定义COM 1 – UART A (UART 1,调试串口,全功能串口)；COM 2 – UART B (UART 4,支持Flow control)；COM 3 – IrDA (WinCE6)或UART C (WEC7)(UART2)；另外还支持额外的两个串口UART 3和UART 5，默认没有使能。
./ WinCE6下COM 3设置为普通串口方法，注册表如下修改
-----------------------------
[HKLMDriversBuiltInSerial3]
" IrConnected"=dword:00000000
[HKLMCommIRSIR]
"ImagePath "="_irsir.dll "
./ UART3 Pin脚定义
SODIMM Pin 115 (GMI_A2) – UART3 TxD
SODIMM Pin 117(GMI_A3) – UART3 RxD
./使能UART 3方法，请在注册表中添加下面内容并保存
-----------------------------
[HKEY_LOCAL_MACHINEDriversBuiltInSerial4]
"DeviceArrayIndex"=dword:00000083
"Prefix"="COM"
"Dll"="libnvuart.dll"
"Order"=dword:00000004
"Index"=dword:00000004
"IClass"=hex(7):7b,00,41,00,33,00,32,00,39,00,34,00,32,00,42,00,37,00,2d,00,39,00,32,00,30,
00,43,00,2d,00,34,00,38,00,36,00,62,00,2d,00,42,00,30,00,45,00,36,00,2d,00,
39,00,32,00,41,00,37,00,30,00,32,00,41,00,39,00,39,00,42,00,33,00,35,00,7d,
00,00,00,00,00
[HKEY_LOCAL_MACHINEDriversBuiltInSerial4Unimodem]
"Tsp"="Unimodem.dll"
"DeviceType"=dword:00000000
"FriendlyName"="Serial on COM4:"
"DevConfig"=hex:10,00,00,00,05,00,00,00,10,01,00,00,00,4b,00,00,00,00,08,00,00,00,00,00,00
./UART5 Pin脚定义
SODIMM Pin 192 – UART5 TxD
SODIMM Pin 49 – UART5 RxD
./使能UART 5方法，由于管脚和Colibir默认定义的SDIO接口冲突，因此需先关闭SDIO功能，请在注册表中修改下面内容并保存
[HKEY_LOCAL_MACHINEDriversBuiltInSDIO]
"Dll"="_libnvsdio.dll"
[HKEY_LOCAL_MACHINEDriversBuiltInSerial5]
"DeviceArrayIndex"=dword:00000084
"Prefix"="COM"
"Dll"="libnvuart.dll"
"Order"=dword:00000004
"Index"=dword:00000005
"IClass"=hex(7):7b,00,41,00,33,00,32,00,39,00,34,00,32,00,42,00,37,00,2d,00,39,00,32,00,30,
00,43,00,2d,00,34,00,38,00,36,00,62,00,2d,00,42,00,30,00,45,00,36,00,2d,00,
39,00,32,00,41,00,37,00,30,00,32,00,41,00,39,00,39,00,42,00,33,00,35,00,7d,
00,00,00,00,00
[HKEY_LOCAL_MACHINEDriversBuiltInSerial5Unimodem]
"Tsp"="Unimodem.dll"
"DeviceType"=dword:00000000
"FriendlyName"="Serial on COM5:"
"DevConfig"=hex:10,00,00,00,05,00,00,00,10,01,00,00,00,4b,00,00,00,00,08,00,00,00,00,00,00