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thanks KlausST
as i mentioned in first post, the communication speed between CPU (slot) and peripherals(cards) Must be at least 25Mbit/s.
It is not a high bit-rate, what i need here is low bit error rate in bus.
thanks for the answers,
so you both recommend to use differential signalling:???:
here is my sketch, i am going to use SN65LVDM1676 any suggestions ?
I think i should use 96 pin DIN connectors for the back-plane. any suggestions for the designing back-plane ping mappings?
Our team has developed a several controller boards for our current Projects for over three years. With little modifications we have used this board in several projects so far. Its structure is as follows:
As you see almost all peripherals are connected to FPGA and The data bus between FPGA...
Hi there !
i have successfully managed to connect a touch screen and a GLCD (128*64)to Atmega128 and wrote a simple PAINT program. :grin:
now i need some sample c codes or maybe some algorithms for
* building Menus on GLCD (heirachical menus),
* making switches on touch screen
* getting...
GPS NTP server provides one pulse per second (1pps) and also it send Network Time Protocol (NTP) packets (via Ethernet) to the PC to sync it. the time pulse can be seen on ocs but how to see time pulse of pc on it to !! there should be a way to see computers clock on the osc , shouln't it?
i have a GPS NTP Time server synchronizing my PC.
HOW am i able to compare 1PPS of the GPS receiver with clock pulse of my PC to see how much accurately it is synced to the GPS time?(with an oscilloscope maybe!)
Hi
I have connected a GPS to Mega32 via USART; I can successfully read both binary and NMEA messages but cannot write to GPS!!!
For example for polling a GPGLL message ,first I disabled all messages via u-center software(I have a ublox GPS and it can be configured via PC with this...
back again !!
Thanks to Jack for directing my notice to my Hardware!!
i found where my problem arise!! it is due to the SPI connection and clk of MCU and ENC but can't solve it completely yet.
i tried these things:
1-i added three 180 ohm on Serial-In, Clock-In and Chip-Select pins on the...
hi
i am doing a project with enc28j60 +AVR
i have written a function that sends out packet: send_packet(length,buffer);
i can successfully capture those packets with WIRESHAK program on the pc side
There is no problem when i send a few packets
but,
When i write this:
While(1) {...
hi
i have successfully connected a UBLOX GPS to an AVR MCU with a simple program in CodevisionAVR, i can read both NMEA and UBX protocol messages in a simple program and then display the raw data on a LCD connected to MCU.
i just need the UBX protocol not NMEA !
I have read the protocol...
Thanks for the replies,
I used a 74HCT125 for converting 3.3 to 5 and it works OK.
I have not connected the reverse direction yet!!
I am going to use a voltage divider for 5 to 3.3!!!
some questions in this regard!
1-“Dose a resistor divider or a transistor switch (above post) may lead to...
i need to connect a GPS operating on 3.3 v to an AVR mega32 with 5v supply via USART.
how is it possible to do that?
i think i need a level convertor!
here are my suggestions!!! are they able to do this?
GPS(3.3v) RX,TX =====>74ACT125(5v)======>MCU(5v) RX,TX
GPS(3.3v) RX,TX...
hello
i need to receive an NTP packet via MATLAB.
as you may know NTP packet is send out using UDP with destination port=123 and source port =123.
so i need to get the packet with an object which has source port(LocalPor)=123 but MATLAB do not allow me to create one :sad:
This is the code...
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