Most two-wire implementations of RS485 will do that. The hardware is usually implemented such that the TX and RX lines are tied together. So whatever is...
1158
Slava
slavka001@...
Aug 1, 2001 3:29 pm
Matthew, if you need to diplay current manifold presure you can use presure sensors that provides output in the digital form. I forgot who makes the, Texas...
1159
dhansen@...
Aug 1, 2001 3:46 pm
Correct - on a half-duplex system you will receive whatever you transmit unless you disable your UART Rx while you transmit. If the ... serBwrFlush(); ...
1160
bmurthazw@...
Aug 1, 2001 4:07 pm
The serial packet drivers are better suited for RS485 than the circular buffer libraries. ... using ... want to...
1161
fisherman95616@...
Aug 1, 2001 6:25 pm
Hello, For your example: serBwrite(TxBuf,len); while (serBwrFree() != BOUTBUFSIZE); this will only detect when the data buffer is empty and doesn't indicate...
1162
David Martin
dmartin@...
Aug 1, 2001 8:05 pm
Hi I've seen mention of Modbus support libraries for either the Rabbit or Z-World boards. Does such a library exist? In my ideal scenario, I'm looking for the...
1163
Rob Henningsgard
rhenn@...
Aug 1, 2001 9:37 pm
Hello all, Has anybody else written code to interface a 2100 to a PC-style keyboard? I need to do this in the coming months, but have no "itch" to do it from...
1164
Charlie Krauter
ckrauter@...
Aug 1, 2001 10:47 pm
The packet driver library (PACKET.LIB) handles some of the trickier, low level parts of writing a full driver for a specific protocol. The 'start character'...
1165
Lynn Wood
lwood@...
Aug 1, 2001 11:03 pm
... I just had a small conversation with someone about this very topic on the Z-World Technical Bulletin Board (http://www.zworld.com/support/bb/index.html)....
1166
bmurthazw@...
Aug 1, 2001 11:49 pm
... Z-World has Modbus libraries for Z180 products. ASCII and RTU is supported for both master and slave. The code is almost all Dynamic C, very little...
1167
mnegron@...
Aug 2, 2001 12:04 am
Does anyone have experience reading and writing the User Block? It seems like the solution to my final hurdle... I read carefully but still am nervous about...
1168
Matthew Snoby
m_snoby@...
Aug 2, 2001 12:49 am
Thank you for all your recommendations. i have decided to go with a analog devices AD7828. When ordering the part the sales person found out that I was...
1169
Bun Fai
rifai@...
Aug 2, 2001 3:00 am
Dear all member, Thanks for give me some explaination of the problem. By the way if I want to define slave-master system with this RS-485 half duplex. The...
1170
bmurthazw@...
Aug 2, 2001 3:32 am
... The user ID block is separate from the system ID block Argument 1 is the destination offset into the block, use 0000 for your first item and go up from...
1171
dhansen@...
Aug 2, 2001 3:57 am
In the instance I used this code, I was using the uC/OS2 RTOS and surrounded the transmit portion with an OSSchedLock()/OSSchedUnlock() pair to prevent context...
1172
spfeif@...
Aug 2, 2001 8:42 am
From and LCD and Keypad a user can select the following commands 1. Change temperature 2. Create unlimited nested loops with a Loop command A hypothetical...
1173
jwhitmire@...
Aug 2, 2001 1:40 pm
Can someone supply me with good code examples where they have implemented SPI? I have been working my way up from the Appl Note AN200, through the test code...
1174
Steve Hardy
shardy@...
Aug 2, 2001 4:15 pm
Compiling the user program would probably be more complex than simply writing an interpreter. If, as your example suggests, you are only changing temperatures...
1175
Rob Henningsgard
rhenn@...
Aug 2, 2001 4:37 pm
Lynn, <<all I've really done is connected the keyboard up to a serial port and read the raw scancodes when keys are pressed. As long as you're not looking for...
1176
mnegron@...
Aug 2, 2001 5:25 pm
Mine is the RCM2200, so no more worries about overwriting! :) Thanks to you, I get it, and I am sure it will work. The last question (obligatory) is: (Forgive...
1177
Tom Barker
tombarker@...
Aug 2, 2001 6:37 pm
Ron, With regard to the kbio, its possible that the serial rate can vary per manufacturer. You may be better off watching the clock from an interrupt and then...
1178
mnegron@...
Aug 2, 2001 10:51 pm
Actually, I did try it and it works : char item1[32],item2[32],item3[32],item4[32]; // assuming null terminated char arrays... writeUserBlock(0x00, item1,...
1179
Tom Collins
tom@...
Aug 2, 2001 11:47 pm
It might be easier to design a complex STRUCT that contains all of the user data you're interested in. typedef struct { char version; char item1[32]; char...
1180
Bill
bill@...
Aug 2, 2001 11:53 pm
... Or use the Windows standard mechanism of storing the size in the first two bytes (or byte). You can always read too much and after the read you then know...
1181
Nick Belson
nbelson@...
Aug 3, 2001 8:08 am
Matthew, Your application looks very similar to one I have been working on. Instead of using a color LCD and touch screen I ended up using the cheap approach ...
1182
pplegrub@...
Aug 3, 2001 1:02 pm
Hi All, I am in need of some assistance with 9-Bit protocol. I have implemented 9-bit high start protocol on RS485 using packet.lib and it seems to work fine,...
1183
Alex (can't you tell)
alex_50_zx6r@...
Aug 3, 2001 2:46 pm
Hello all, Could anyone give me an example of some initialization code in which all ports and other things that need to be initialized via Dynamic C are. I...
1184
Mike Rauch
MRauch@...
Aug 3, 2001 3:05 pm
Not sure of question? everything is automatically initialized to defaults. Sample program on what you have to do void main() { } ... From: Alex (can't you...
1185
Alexis Bussiere
alexisbussiere@...
Aug 3, 2001 3:13 pm
I knw about the main(), but what I meant was about initializing the Ports. I was having problems with the initializations of Port E when it cam to the internal...
1186
Lynn Wood
lwood@...
Aug 3, 2001 3:22 pm
... Port E is set up by the BIOS as follows: PECR = 0x00 update on perclk/2 PEDDR = 0x00 all inputs PEDR = 0x00 data = 0x00 PEFR = 0x00 no external I/O...
