distance measuring by encoder
I bought an encoder which generate square pulses sig. i have to stop the engine if arrived to a required distance. i know that the wheel diameter is 7cm. and the distance is pi*diameter and it equals...
View ArticleQuestions about SGDMA's IN connected to Avalon-ST Dual Clock FIFO.
If SGDMA(Stream to Memory)'s IN is connected to Avalon-ST Dual Clock FIFO's out,the there are SOP,EOP signals built in SGDMA IN port. The SOP,EOP inside SGDMA IN port is INPUT attributes,and the DC...
View ArticleAdditional circuit within a circuit - if then else
Hello, I am a beginner to VHDL and currently have an assignment to complete. It is as follows: A digital circuit has two 4-bit inputs a[3..0] and b[3..0]. A 4-bit output s[3..0] is to represent the...
View ArticleAccess SPI Slave to Avalon Master Bridge via AVR XMega
Hello, I'm just going to insert into my QSys system, an SPI slave Avalon MM bridge. MISO / MOSI / SCK / nSS are physically connected to an AVR XMega. The XMega acts as SPI master. The QSys contains an...
View ArticleTransceivers on a GX FPGA - to use or not to use?
Hello, I am designing a custom board using a Stratix IV GX FPGA for the first time (EP4SGX70HF35). I'm interfacing three 16-bit ADCs to the FPGA and was considering using transceivers to receive the...
View ArticleGenerate Device Tree Help and kernel compile questions
Thanks in advance for any help. Im a newbie to NIOS II embedded system design and would like to use the uClinux (version 2.6.38+mmu) running NIOS 2/f processor on my project. I have been following the...
View Articlelog /* with Modelsim doesn't log all signals at top level, etc...?
Hi - I can't find much on the web about this, but I'm wondering if anyone else has run into, or (even better) solved, this issue... I'm using free modelsim with my paid quartus. When I run modelsim...
View ArticleHAL-Driver not included in BSP
Hallo! I'm currently trying to include a driver into the auto-generated HAL in a BSP. I followed the steps in the "Nios II Software Developers Handbook" from May 2011 (p. 7-20ff). So I currently have a...
View Articlevhdl SXT function
Hai all, Can anyone explain the SXT function in vhdl code? For example bp<=SXT(a,9)..I try to study from reference book and find others tutorial, but make me more confuse. Please help me :confused:
View ArticleTerminal in PC to store USB port data
Hello, I want to store data coming from USB port of FPGA in some form like text file. The data on the USB port is generated after some processing in FPGA. The data rate is 12 Mbps. Is there any...
View ArticleDDR2 synthesis error with Arria II Gx
Hi Folks, I get the following error message when I try to compile my design using DDR2 controller. Error (17044): Illegal connection found on I/O input buffer primitive...
View ArticlePerformance of SPI SD Controller
Hi, I am planning on using SD card and FAT library with my Altera design. SPI mode seems the simplest variant of all, so google'd for some benchmarking of this mode. The only one I could find was the...
View ArticleHow to Examine EPM7128S?
Hello, I'm trying to extract the binary from an EPM7128SLC85 so I can program new chips. The original developer left the company a few years ago and provide no documentation and I have no idea where...
View ArticleVHDL entity and architecture not in same file not accepted by quartos (12.1)
We generate VHDL entities with automated tools, and then write the VHDL architecture code using the generated entity code contained in a different file. This works with lots of other VHDL tools. Am I...
View ArticleMaking a process
Hello A B C F(A,B,C) Code: 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 0 1 1 0 0 1 1 1 1 With the truth table above,how can I make a process? A,B,C need to...
View ArticleCyclone III FPGA Starter Kit External Power supply Question
Hello: What external power supply Cyclone III FPGA Starter Kit External Power supply would be recommended Manufacture and model number if possible Thank You DLW
View ArticleReed Solomon Decoder Simulation - Missing Files?
I used the MegaFunction Wizard to build a Reed Solomon II Encoder and Decoder. The encoder works great; however, the decoder appears to be missing files. Has anyone come across this? The specific...
View ArticleQuartus II Settings File changed outside of Quartus II warning?
Hi, I see this warning pop up when I compile my design: "The Quartus II Settings File changed outside of the Quartus II software and contains errors. Rewriting the Quartus II Settings File with the...
View Articleforce SGDMA receive side shutdown using TSE MAC
Hello All, When using the SGDMA stream-to-memory configuration of the TSE MAC receive side, the network interface driver software typically sets the buffer length to zero in the SGDMA's DMA descriptor...
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Error: Type conversion (to UNSIGNED) can not have string literal operand
Hai all, I have run a testbench simulation in ModelSim and get this error: # ** Error: bmp_generator.vhd(401): Type conversion (to UNSIGNED) can not have string literal operand. # ** Error:...
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