//=====================================================================
//TITLE:
// TCC89x串口设置关键
//AUTHOR:
// norains
//DATE:
// Thursday 29-March-2011
//Environment:
// Visual Studio 2005
// Windows CE 6.0
// Telechips TCC8900
//=====================================================================
关于Telechips的TCC89x系列来说，串口资源不可谓不丰厚，整整六组串口，应该能满意大多数的运用场合了。
假如运转的是Windows CE操作系统的话，除掉作为调试的Debug口，那么还剩余五组可供运用程序运用。而这五组串口的使能，并不需求做太多的作业，只需求书写相应的注册表数值即可。只不过比较惋惜的的是，Telechips原版的注册表，只使能COM1~COM3这三组，而COM4和COM5只能自己着手。不过这关于经验丰厚的开发者来说，并不是一件很难的工作，完全能够依样画瓢。只不过，有下面几点需求留意。
1. COM_ChNum和COM_PortNum有必要对应
COM_ChNum是串口的通道，COM_PortNum是对应的PIN脚，这两个数值都能够在注册表中进行设置。但这并不意味着，能够随意设置，而有必要要依照如下的映射联系：
|
COM_ChNum |
COM_PortNum |
|
1 |
1 |
|
2 |
4 |
|
3 |
5 |
|
4 |
2 |
|
5 |
3 |
简略点来说，假如COM_ChNum为3的话，那么COM_PortNum就有必要为5。为什么会有如此古怪的联系呢?其实这是由于代码中规则的。翻开Magellan/Src/LIB/SOC/UART/TCC89x/tca_serial.c文件，检查tca_serial_portinit函数，就能够发现代码中现已逐个映射，如下图所示：
而注册表有必要要和代码保持一致，所以COM_ChNum和COM_PortNum的联系也就定死了。
2. DMA不支撑Channel4~Channel5
这个关键在Datasheet的800页有如下的阐明：
翻译为中文，大致是：DMA发送和接收在UART的Channel0~3是可用的。但假如是Channel4和Channel5，由于无法运用硬件操控，所以无法DMA。假如一定要运用DMA传输方法，请保证运用的是Channel0~3。
由于在Telechips的默许注册表中，Channel0~3现已被调试口和COM1~COM3所运用了，剩余的COM4和COM5只能抛弃DMA的方法。而详细到注册表，则是USEDMATX和USEDMARX这两个键值的数值有必要为0。
最终，则是看看完好的串口设置信息列表，Telechips没有给出的COM4和COM5设置也一并在表格中列出：
|
序号 |
Channel |
Port |
Tx |
Rx |
注册表 |
DMA |
|
Debug |
0 |
0 |
GPIO E[0] |
GPIO E[1] |
无 |
支撑 |
|
COM1 |
3 |
5 |
GPIO D[17] |
GPIO D[18] |
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/Serial1] DeviceArrayIndex=dword:0 COM_ChNum=dword:3 COM_PortNum=dword:5 MemBase=dword:B100C000 irq=dword:2F MemLen=dword:2C InterruptBitsShift=dword:0 ; UART 0 Interrupt Sub Register shift bit. ISTTimeouts=dword:200; every 512 ticks checking Modem status. Prefix=COM Index=dword:1 Dll=tcc_serial.dll Order=dword:1 Priority256=dword:e0 Port=COM1: DeviceType=dword:0 FriendlyName=Serial Cable on COM1: Tsp=unimodem.dll IsrDll=tcc_giisr.dll IsrHandler=ISRHandler DMAIsrHandler=DMAUARTISRHandler USEDMATX=dword:1; 1:on0:off USEDMARX=dword:0; 1:on0:off IClass={CC5195AC-BA49-48a0-BE17-DF6D1B0173DD} 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 |
支撑 |
|
COM2 |
1 |
1 |
GPIO E[4] |
GPIO E[5] |
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/Serial2] DeviceArrayIndex=dword:1 COM_ChNum=dword:1 COM_PortNum=dword:1 MemBase=dword:B1008000 irq=dword:2F MemLen=dword:2C InterruptBitsShift=dword:0 ; UART Interrupt Sub Register shift bit. ISTTimeouts=dword:200; every 512 ticks checking Modem status. Prefix=COM Index=dword:2 Dll=tcc_serial.dll Order=dword:1 Priority256=dword:e0 Port=COM2: DeviceType=dword:0 FriendlyName=Serial Cable on COM2: Tsp=unimodem.dll IsrDll=tcc_giisr.dll IsrHandler=ISRHandler DMAIsrHandler=DMAUARTISRHandler USEDMATX=dword:1; 1:on0:off USEDMARX=dword:1; 1:on0:off IClass={CC5195AC-BA49-48a0-BE17-DF6D1B0173DD} 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 |
支撑 |
|
COM3 |
2 |
4 |
GPIO D[13] |
GPIO D[14] |
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/Serial3] DeviceArrayIndex=dword:2 COM_ChNum=dword:2 COM_PortNum=dword:4 MemBase=dword:B1004000 irq=dword:2F MemLen=dword:2C InterruptBitsShift=dword:0 ; UART Interrupt Sub Register shift bit. ISTTimeouts=dword:200; every 512 ticks checking Modem status. Prefix=COM Index=dword:3 Dll=tcc_serial.dll Order=dword:1 Priority256=dword:e0 Port=COM3: DeviceType=dword:0 FriendlyName=Serial Cable on COM3: Tsp=unimodem.dll IsrDll=tcc_giisr.dll IsrHandler=ISRHandler DMAIsrHandler=DMAUARTISRHandler USEDMATX=dword:1; 1:on0:off USEDMARX=dword:1; 1:on0:off IClass={CC5195AC-BA49-48a0-BE17-DF6D1B0173DD} 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 |
支撑 |
|
COM4 |
4 |
2 |
GPIO E[8] |
GPIO E[9] |
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/Serial4] DeviceArrayIndex=dword:3 COM_ChNum=dword:4 COM_PortNum=dword:2 MemBase=dword:B1000000 irq=dword:2F MemLen=dword:2C InterruptBitsShift=dword:0 ; UART Interrupt Sub Register shift bit. ISTTimeouts=dword:200; every 512 ticks checking Modem status. Prefix=COM Index=dword:4 Dll=tcc_serial.dll Order=dword:1 Priority256=dword:e0 Port=COM4: DeviceType=dword:0 FriendlyName=Serial Cable on COM4: Tsp=unimodem.dll IsrDll=tcc_giisr.dll IsrHandler=ISRHandler DMAIsrHandler=DMAUARTISRHandler USEDMATX=dword:0; 1:on0:off USEDMARX=dword:0; 1:on0:off IClass={CC5195AC-BA49-48a0-BE17-DF6D1B0173DD} 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 |
不支撑 |
|
COM5 |
5 |
3 |
GPIO E[10] |
GPIO E[11] |
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/Serial5] DeviceArrayIndex=dword:4 COM_ChNum=dword:5 COM_PortNum=dword:3 MemBase=dword:B0FFC000 irq=dword:2F MemLen=dword:2C InterruptBitsShift=dword:0 ; UART Interrupt Sub Register shift bit. ISTTimeouts=dword:200; every 512 ticks checking Modem status. Prefix=COM Index=dword:5 Dll=tcc_serial.dll Order=dword:1 Priority256=dword:e0 Port=COM5: DeviceType=dword:0 FriendlyName=Serial Cable on COM5: Tsp=unimodem.dll IsrDll=tcc_giisr.dll IsrHandler=ISRHandler DMAIsrHandler=DMAUARTISRHandler USEDMATX=dword:0; 1:on0:off USEDMARX=dword:0; 1:on0:off %&&&&&%lass={CC5195AC-BA49-48a0-BE17-DF6D1B0173DD} 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 |
不支撑 |
