Yes, you can design a board of your own.
Just be sure to put a female SUBD9 connector
on the board for easy programming.
And don't forget the two 0.1uF capacitors
on the ATN line.
Yes you can.
The required parts to be able to program the javelin are connectors J1 and J2,
capacitors C3 and C4 and socket U1. If you design an application board,
I advice to include series resistors of 220 ohm on·all Javelin I/O pins to prevent
damage to the javelin due to program errors. These resistors will limit
I/O pin current in case two output pins are connected together.
Yes you can. The difference is the Javelin Demo Board has a 2nd COM port with
onboard level shifter TTL-RS232. This was done because the Javelin JIDE port,
which is used for programming, outputs debug data that contains additional bytes,
so the programming port cannot be used to talk to serial devices.
If you used the basic stamp board with basic stamp to talk to such a device
then you need to add a levelshifter when you use the basic stamp board with a javelin.
Robot Freak,
That issue has been resolved. See this thread: http://forums.parallax.com/showthread.php?p=656527
If you think you have a small program that proves otherwise,
please post it and I will test it.
The problem is that there is no design flaw. The issue that causes this is related in part to PC USB latency issues. Some people don’t experience the problem. Those that do can use Peter’s work-around, but since the USB-BOE was designed for the BASIC Stamp it will most likely not be revised due to this one issue. At some future point it may be revisited but even now some BASIC Stamp users have to make software adjustments to the PC USB settings to get communication. Again, not everyone is affected and, at least with the BASIC Stamps, this work-around solves 99% of the communication problems with the BASIC Stamp over the USB connection, but it also serves to point out that the issue isn’t on our hardware. As technology changes we will attempt to adapt as best we can to serve our customers. Take care.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Chris Savage Parallax Tech Support
ichoel
Posts: 17
Comments
Just be sure to put a female SUBD9 connector
on the board for easy programming.
And don't forget the two 0.1uF capacitors
on the ATN line.
regards peter
The required parts to be able to program the javelin are connectors J1 and J2,
capacitors C3 and C4 and socket U1. If you design an application board,
I advice to include series resistors of 220 ohm on·all Javelin I/O pins to prevent
damage to the javelin due to program errors. These resistors will limit
I/O pin current in case two output pins are connected together.
regards peter
onboard level shifter TTL-RS232. This was done because the Javelin JIDE port,
which is used for programming, outputs debug data that contains additional bytes,
so the programming port cannot be used to talk to serial devices.
If you used the basic stamp board with basic stamp to talk to such a device
then you need to add a levelshifter when you use the basic stamp board with a javelin.
regards peter
It stops functioning.
That issue has been resolved. See this thread:
http://forums.parallax.com/showthread.php?p=656527
If you think you have a small program that proves otherwise,
please post it and I will test it.
regards peter
Yes, I know you solved it.
But are the new BoE's changed?
Isn't it a littlebit strange?
You buy something from Parallax and you have to modify it right away?
The problem is that there is no design flaw. The issue that causes this is related in part to PC USB latency issues. Some people don’t experience the problem. Those that do can use Peter’s work-around, but since the USB-BOE was designed for the BASIC Stamp it will most likely not be revised due to this one issue. At some future point it may be revisited but even now some BASIC Stamp users have to make software adjustments to the PC USB settings to get communication. Again, not everyone is affected and, at least with the BASIC Stamps, this work-around solves 99% of the communication problems with the BASIC Stamp over the USB connection, but it also serves to point out that the issue isn’t on our hardware. As technology changes we will attempt to adapt as best we can to serve our customers. Take care.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support