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"VHDL implementation and synthesis of adaptive thresholding" by Nicholas P. Sardino
Many people turn to me for advice regarding their FPGA projects. Often, my answer is not what they expected: have you considered using a microcontroller instead of an FPGA?
Why would I say such a thing? When you are learning FPGA design using VHDL, of course, you have to start with simple projects. Then, you should put that theory to the test. A computer program works on a higher abstraction level than a digital circuit, master thesis vhdl. Just like a high-level language, like Python, is easier to work with than C, you may be able to program C faster than you can create logic using VHDL.
On a microcontroller, you can perform inline debugging through JTAG. That makes it a lot easier to test and debug. Therefore, you can get away with creating little or no software tests. We can only read the instantaneous signal values and capture short waveforms. println whenever you want to print something to the console.
The main reasons why engineers turn to FPGAs are performance or connectivity related. Another reason to use FPGAs is that you can make them more reliable than a microcontroller or microprocessor. FPGAs have almost perfect timing of input and output signals. You can create logic for handling every kind of digital interface up to a few hundred Megahertz. If you are lucky, someone has already created a module that you can import into your project.
For example, from OpenCoresXilinx IP Cores master thesis vhdl, or the Intel IP and Reference Designs library. Microcontrollers usually come with dedicated hardware interfaces like UART, SPI, or I²C. These special pins on the microcontroller are capable of sending and receiving data at high speeds while maintaining signal integrity.
You can use general-purpose IO pins to emulate any IO interface using a method called bit-banging. But the speed is going to be low, and the signal integrity is going to be awful. FPGAs, on the other hand, can handle as many IO interfaces as you have IO pins for. Need to attach another high-speed sensor using I²C? No problem! On the FPGA, all general-purpose pins are potential high-speed interfaces.
As Master thesis vhdl said earlier, you can implement custom interfaces in microcontrollers by using bit-banging. These are ICs that allow you to control multiple digital wires by using less pins on the microcontroller. Therefore, master thesis vhdl, in theory, you can read from a large number of data sources in parallel by using a microcontroller.
The problem is that the processor in the microcontroller can only read from one source at the time. It can only do it one at the time. That can be a problem if you need to sample a consistent dataset. Master thesis vhdl example, if you are reading multiple voltages and currents in a high-speed analog circuit.
You would want to sample the voltage and current values in parallel, master thesis vhdl. Any skew on one data series may ruin the dataset. An FPGA is capable of initializing reads in parallel, at pretty much the exact same time. If your application is required to read, write, or process data in parallel, then you may want to use an FPGA.
In real-time computingthe application has strict deadlines for how long master thesis vhdl processing time of each dataset can be. The device must read the inputs at fixed intervals, and churn out the results with a fixed delay, no matter what. Software is inherently non-real-time. They run bare-metal programs that, in theory, can be used for hard real-time requirements.
But you must analyze the critical parts of your program on an Assembler level to verify that it always completes in time. These extra steps make it more difficult to develop microcontrollers, which kind of defeats the purpose of using them in the first place. Depending on how strict your real-time requirements are, you may want to choose an FPGA for these tasks.
If you have high data volumes that need processing, a microcontroller may be too slow. Microcontrollers are generally low-cost devices running on clock speeds up to 20 MHz. You could even implement a microcontroller in an FPGA.
If a microcontroller is too master thesis vhdl, the next logical step is to use a microprocessor. Unlike microcontrollers that are mostly self-sufficient, processors require external components like RAM and non-volatile memory. A well-known embedded computer is the Raspberry Pi. The high-end versions are inexpensive and have the full connectivity of a desktop computer. Its 1. It would probably be just as challenging as using an FPGA because you have to accommodate the other digital components that the processor relies on.
Other factors than throughput usually determine if you want to use a microprocessor or an FPGA, although there are specialized computing tasks where an FPGA implementation is superior. Microcontrollers are very power conservative. Many of them have sleep modes that reduce the current to only a few µA. But it all depends on the use case, master thesis vhdl.
FPGAs can be more power conservative than microcontrollers or microprocessors. If your application performs continuous calculations, the FPGA may use less power than the processors. FPGAs are considered to be less error-prone than microcontrollers. You know this intuitively already. How many bugs have you not seen in well-known computer programs?
Does your car malfunction at an equal rate? The exact numbers are hard to find, but this article states that each Airbus A contains more than FPGAs from one vendor alone. Numbers are probably similar for other aircraft. Electronics and software used in aircraft must be proven error-free, master thesis vhdl. FPGAs fall under the hardware category, and therefore must comply with the DO Design Assurance Guidance for Airborne Electronic Hardware.
Software, on the other hand, is subject to verification under the stricter DOC certification standard. If failure of your device means that someone is going to get hurt, you may want to go for an FPGA instead of using a software approach. It depends on the requirements of your project.
They have different qualities that you need to assess the importance of on a case-by-case basis. If I can get away with using a microcontroller, I will do it, master thesis vhdl. Your email address will not master thesis vhdl published. Notify me of replies to my comment via email. This site uses Akismet to reduce spam.
Learn how your comment data is processed. This is a great article and a must read for every architect in the IOT space thinking of developing solutions for the next generation. Thanks for sharing. Great post Jonas. Great info. This question has been on my mind for awhile now. I know that many people have doubts master thesis vhdl which device to use. I think your analysis are precision. By the way, What do you think Verilog and VHDL language?
and how about SystemVerilog? I was used VHDL to program for a long time, but my job must use SystemVerilog or Verilog, so I want to know what the advantage on VHDL? I think they are probably great HDLs too. One advantage of VHDL is that there are many free, master thesis vhdl, open-source libraries that you can use for testbenches. For example, UVVM, OSVVM, and VUnit. Those are mature frameworks that are still continuously developed. Finally, VHDL is a master thesis vhdl typed language.
Whether or master thesis vhdl you like it comes down to personal preference. But many people agree that having strick type checking helps you detect errors at compile time rather than at run-time. So it confuses me for a long time. However, you give me a good reason to keep learning VHDL, master thesis vhdl, thank you very much. Sometimes I code on my side projects, I use Verilog to program it because it is easy to finish quickly.
Maybe the next time, I will use VHDL to program it, master thesis vhdl, and also consider FPGA or master thesis vhdl. This link is my one of experiment if you are interested. It is implemented on FPGA and running on the Video stream about video processing algorithm.
SPI Master in FPGA, VHDL Code Example
, time: 9:13About My Master Thesis – Hasan Yavuz Özderya
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