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恩山无线论坛»论坛 › 无线设备硬件相关板块 › 无线路由器硬件改造以及故障维修 › 终于搞定340G+的TTL了
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终于搞定340G+的TTL了

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atshot
发表于 2012-6-12 13:18 | 显示全部楼层 |阅读模式
        最近想玩一下路由器改造和WRT，手头只有340G+和541G+，无奈两个加上TTL都乱码，淘宝买的带TTL的编程器始终没给人家确认，怕是TTL的问题，
网上看了不少帖子，基本上就是给出了接法而已，很多人直接能用了，有的人能输出但是不能输入。
       我这个340G+版本是V2.3的，线路上不缺电阻，按照https://www.right.com.cn/forum/forum.php?mod=viewthread&tid=44851的接法，TTL输出的全是乱码，
看到过论坛上关于841的TTL的一个说法，说是TP使用了一个容量过小的电容导致的，于是照搬，把PCB上的C356给刮下来短接了，图省事直接用焊锡短的，
好大一坨，想想应该没啥事，就没管，再次接上TTL线，速度设置38400，成功输出了，但是不能输入。
      仔细看了一下电路，RX和地线短路了，于是去认真的清焊点，发现怎么清都短路，于是直接断开C356再次测试，这次能正常的显示和输入了，至此TTL
正常工作。
      总结给只想看结论的朋友：断开C356并保持它的两端断路并设置波特率为38400即可。
ttl40pin, ttl等于60, ttl一般多少

点评

cutebt
这个如何断开C356呢。。。有图吗。。谢谢。。  发表于 2013-3-4 13:20

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hanhg
发表于 2012-6-12 13:38 | 显示全部楼层
好贴，顶起！
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atshot
 楼主| 发表于 2012-6-12 19:32 | 显示全部楼层
刚才拆开了一个541G+，发现PCB和340G+基本上是一样的，处理方法也是一样的，不过这个电容位置小有变化
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pierlee
发表于 2012-8-13 11:22 | 显示全部楼层
我刚刚试了，是115200的速率

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atshot
反正我的38400好好的，而且我的TTL线跑115200是会乱码的，所以我那台肯定没弄错  详情 回复 发表于 2012-8-14 08:29
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ymym
发表于 2012-8-13 16:10 | 显示全部楼层
学习了，谢谢分享
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atshot
 楼主| 发表于 2012-8-14 08:29 | 显示全部楼层
pierlee 发表于 2012-8-13 11:22
我刚刚试了，是115200的速率

反正我的38400好好的，而且我的TTL线跑115200是会乱码的，所以我那台肯定没弄错
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发表于 2012-10-17 15:39 | 显示全部楼层
我的是115200的速率，只是按ctrl+c停不住，反复在重启啊，反复显示

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading.........................................................................
...........mem setup
scanning for root partition

found RedBoot partition at [0xA8000000]
found linux partition at [0xA8010000]
decode 1f02
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
Rebooting in 1 seconds..MicroRedBoot v1.3, (c) 2009 DD-WRT.COM (Jul  6 2009)
CPU Clock: 184Mhz
Found Flash device SIZE=0x00800000 SECTORSIZE=0x00010000 FLASHBASE=0xA8000000
DD-WRT NVRAM with size = 24 found on [0xA87D0000]
found bootable image: [linux] at [0xA8010000] EP [0x80041000]
Booting Linux
loading................


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atshot
 楼主| 发表于 2012-10-17 21:05 | 显示全部楼层
你这个刷的fullflash固件，uboot不是tp的了，能停下来才怪
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发表于 2012-10-30 11:51 | 显示全部楼层
已经搞定了，一直按复位键到不再反复重启，然后TFTP上传，我的是硬改DD，刷FON2201的固件，现在恢复到原厂固件后速率是38400
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发表于 2013-3-7 16:11 | 显示全部楼层
波特率还都不一样？版本不同？

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cutebt
是的。。。。我的4.0 还不清楚ttl接法。。我是vcc rx tx gnd 还  发表于 2013-3-7 18:33
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发表于 2013-5-16 21:13 | 显示全部楼层
{:soso_e127:}LZ，按你说的，拆了那个电阻，还是不行.TTL，没输出信息！波特率也设置过了
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guyueno
发表于 2013-11-9 13:30 | 显示全部楼层
学习了哦，备注一下。
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