passing through serial

hinv · 2010-03-04 02:05

Hi,

I want to use a ProtoBoardUSB to connect to any number of 3v3 line level serial consoles, like for the Zipit, or my wgt634u. For some reason, I just get garbage out, when captured through Brad's spin tool looks like this:

80 E8 EC 2D 0F 25 98 CA F8 B4 5D AD B0 2F 56 A4
  53 05 82 DE 2F 35 80 44 26 53 13 09 CC FC 98 BC
  26 9D 48 80 54 4B DC A2 33 48 21 F0 98 1C 4C 26
  90 48 50 85 51 E6 F2 FB BA DC 2D 52 EC FC EC B4
  5B 00 C6 EF B6 B6 FD D6 22 A4 81 60 40 8C 6F 90
  86 80 DE F0 B7 8C AA 75 82 E2 2D 87 00 62 B3 E0
  B7 06 6B 8C 80 CA F9 B0 7C E7 E4 F3 35 14 A3 1C
  7B 13 2D 18 14 86 B0 5B 2D EC 98 97 4C 89 F3 C9
  7F 07 25 E2 26 0C 44 F0 84 34 F2 B9 7F 87 45 1E
  8F E6 B3 7C 0F 8C 16 B5 60 1B 2C FB A4 FC E6 B3
  0F 8C 16 B5 60 AC A4 D0 DC E6 B7 7C 0F 00 A6 A2
  2C 96 8B D5 00 FE F0 B6 90 84 E5 F8 DA A2 33 5D
  F0 E3 B4 DC 86 F3 6B 1A 87 A1 EF 45 00 CC B9 85
  13 9C FB 86 C2 E1 B7 0F A0 B7 1B 2D 55 90 D2 B7
  51 57 65 DA FB 86 C2 A2 F8 29 13 B0 5A 4F 00 7A
  66 A2 EC E0 B9 43 E0 FB B2 3B 6F 6F 29 FF EC B7
  3B 18 14 43 B4 2C 15 04 C1 18 14 BB 13 3C E5 2D
  00 7A A0 92 9A C2 FB 53 00 7A A0 98 27 03 53 A9
  40 72 9D 1C 21 E0 FB BA 5C 07 A4 67 45 98 FB B0
  2D 13 29 25 9E EE EC B2 5B AE CC FC B9 BF 7C 17
  E5 70 40 E0 B8 5C 21 E0 FF A4 54 29 29 4A 81 10
  87 94 AA 55 99 C4 FF B6 FF 2C 97 E4 E4 F3 35 14
  BA 59 AD EC 7A 98 21 E0 00 00 00

instead of like this:

Aeronix Zipit2 Version 1.00 7-10-2007

blob version 2.0.5-pre3 for Intel HCDDBBVA0 (Mainstone)
Copyright (C) 2007 Jan-Derk Bakker and Erik Mouw
blob comes with ABSOLUTELY NO WARRANTY; read the GNU GPL for details.
This is free software, and you are welcome to redistribute it
under certain conditions; read the GNU GPL for details.

RTC Clock Enabled.
Memory map:
  0x02000000 @ 0xa0000000 (32 MB)
LCD: init ...Loading blob from flash . done
Loading kernel from flash ......... done
Autoboot (0 seconds) in progress, press any key to stop
Autoboot aborted
Type "help" to get a list of commands
blob>

Which is what get when using my propplug.
Here's my program:

{{3vSerial.spin}}
' Eventually this will be a program to use the prop dongle as a 3.3v port to
' connect to a WGT634u and similar 3.3v serial ports
CON
  _clkmode = xtal1 + pll4x   'Set for slow crystal
  _xinfreq = 5_000_000       'Use 5 MHz accurate crystal

  conTx    = 30                      ' Boot serial port(USB FTDI) transmit pin
  conRx    = 31                      ' Boot serial port(USB FTDI) receive pin
  devTx    = 1                       ' 3v target serial port transmit pin
  devRx    = 0                       ' 3v target serial port receive pin
  
OBJ
  console : "FullDuplexSerial"     ' Serial port for console
  device  : "FullDuplexSerial"     ' Serial port for device

VAR
  Long console2deviceStack[noparse][[/noparse]20]

PUB main | err, s
  console.start(conRx,conTx,%0000,115200)    ' Start console serial port
  device.start(devRx,devTx,%0000,115200)     ' Start device serial port
  CogNew( console2device, @console2deviceStack )
  repeat  'run device2console in main cog
    device.tx(console.rx)

PRI console2device
  repeat
    console.tx(device.rx)

I also get zero's when I should get nothing. Anybody know what I am doing wrong?
I have tried %1000 and even %0001 in the device start configuration bits, but to no avail.

Any help would be appreciated.

Thanks,
Doug

Mike Green · 2010-03-04 02:14

For a start, you're not going to be able to run a full duplex 115.2KBaud channel (or two of them) with a 20MHz system clock. Either speed up the system clock or lower the Baud you're using.

hinv · 2010-03-04 03:25

Well, that was simple. Than you so much mike. It works great now.

Thanks,
Doug

passing through serial

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