#programming style

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Want A Proper Programming Style? Here Are Rules You Need To Follow

Irrespective of whether you’re an amateur or a professional programmer, following a proper programming style allows you to increase the functionality of the software product. Plus, you can also ensure a visible reduction in the occurrence of software disasters. Today, through this post I’ll be making you familiar with some of the best rules that help you in attaining a better programming style.…

Today, we got down to business and programmed a checkers game by ourselves. It was the first time we had a whole day to program without pairing up with a partner. It was a great barometer of what we could handle individually and also instructive about what coding will be like in most organizations. While pair programming is great as a learning device, it is not practiced very often in the field. It's valuable, then, to get exposure to coding non-trivial projects on our own, and end of second week seems a fine a time as any.

I found that it was refreshing to code without vetting design decisions through another person. Lots of my peers felt the same way. There's a speed and joy that comes from being free to explore your thoughts in code on your own terms. My own style, as it seems so far, is to build out a class/method skeleton, and pick and chew at the implementation from the bottom and the top, meeting at the middle. I figure out how to represent my data, and start growing it up like roots. Then, as fancy strikes, I may switch up to code user interaction and the general run interface. I jump around and work inwards. That's something I definitely cannot do while pair programming with a partner. The unimplemented methods would drive them mad.

On the flip side, I feel that, without a steadying presence of a partner, I ended up building upon some rather brittle design decisions. My Board class, for example, ended up being passed as an instance variable to my Piece class, passed as an argument to many methods on my Player class, and being invoked in my Game class's play(run ~main) method. I implemented move validation in a circuitous cycle involving the Player and Piece classes, both referencing the board for coordinates. It all works, but the repetition and coupling leaves a slightly bitter taste.

During class, I ran into a lot of bugs in my code. A particularly sneaky one kept my board from properly instantiating the initial pieces. After trying out several approaches, I called for help from my mentor, Ryan. He was visibly annoyed that I had not debugged as thoroughly as I should have. I love Ryan. He's a hard-ass, which is exactly what I needed at that moment. In a few minutes he got me back on track. As enamored as I had become with PRY, sometimes the best medicine is a whole bunch of puts statements. Print out the method you're in, print out the values you're looking for, and BAM...now you've got an easily visible chain of where the logic is going wrong. This won't work so well on larger projects, of course. That's why next week we begin with TDD and RSpec.

I should mention that to get my checkers to a working state required more time than only Friday. I continued working into the weekend. When coming into App Academy I was aware that the average course load was going to be ~80 hours per week. I'd say that the figure is fairly accurate, if anything on the low end. Is it exhausting? Yes. That's why it's a bootcamp. Each morning, though, is a new adventure. It is exhilarating to come in each day and create.

Through being familiar with the device framework, is chosen appropriate hardware platform and silicon dice characteristic, and through disposing the appropriate and of good performance implementation tool, designers can obtain higher design performance. However, in it is to write the efficient HDL code for the goal device if the numerous methods to improve design performance are easiest to ignore. Programming style and skill that this text discusses can improve design performance.

Use and reset the impact on characteristic

Which kind of system level choice is there such influence that is important can emerge to the characteristic, area and power as resetting and choosing. Some systematic framework teachers stipulate that must use the overall situation systematically asynchronously to reset. Adopt, have a match clever the intersection of FPGA and framework that think, use and type that reset exert an important influence to the intersection of code and characteristic.

All is comparable to fairy and think in FPGA framework at present, look-up table (LUT) The unit is just like logic, ROM/RAM or shift register (SRL or shift register LUT) It is the configurated like that. The synthesis tool can educe that adopts a certain structure according to RTL code. However, in order to use LUT as the shift register, can't describe the reset function in the code, because SRL does not have reset function. This means too the shift register code with reset function can't get realizing (needs a plurality of flip-flops and relevant routes between the shift registers) best ,But the code without reset function can obtain the fast and compact realization result (use SRL) .

Two the intersection of situation and impact on area and power these, obviously a little, but impact on characteristic does not very obvious. Generally speaking, the shift register adopting the flip-flop and producing will not become the critical path in the design, because the sequence route between the registers does not usually have sufficient length that become the most long route in the design. And resources (flip-flop and routing) Can consume about designs other have overall arrangementing more partial and routing to choose to exert a negative influence, therefore may cause and route in the route more longly.

Specialized multiplier and RAM module

The multiplier is usually used in DSP to design. Have a match clever FPGA that think include the intersection of multiplication and private resource in the framework, have application of multiplier in a lot of design. These multipliers offer other functions besides carrying out multiplication to operate. Similarly, no matter which kind of application in fact, each FPGA can use RAM not of uniform size to design.

Comparable to fairy and think of FPGA and include several pieces of RAM module, can use in the design as RAM, ROM, large-scale LUT even common logic. It can obtain compactness, have more high-performance design to use multiplier and RAM resource, but reset and choose the one with front, there is negative influence, depend on specifically what used reset the type. RAM and multiplier module only include resetting synchronously, so if the codes of these functions use asynchronously to reset writing, the register then in the module is unable to use. This impact on characteristic is very severe. For example, the whole pipeline type multiplier of Virtex-4 device is adopted asynchronously and reset while designing, the frequency is the highest can only reach 200MHz, and after making the code into resetting synchronously, the characteristic can be raised by more than twice, frequency reachable 500MHz.

Treat the problem related to RAM from two respects. Similar to multiplier, Virtex-4 piece RAM has available output registers, uses the clock that they can reduce RAM to output time, improve the whole design speed. But register these offer, reset synchronously only, offer asynchronous to reset, so register in the contemporary yard adopt asynchronous to reset while describing right away unable to use these register.

When the second question comes from RAM and is used as LUT or common logic. The consideration based on area and characteristic sometimes, it is very beneficial to configure a plurality of logical LUT to ROM or common and compress and enter the single piece RAM. This through presuming the structure manually, or realize by mapping some logic design to RAM storage area not in use by automatic way. Because RAM synchronous reset function, resets(or not reset) synchronously as using When, can realize common that logical that shine upon without changing the design function that has been already defined. But reset it while describing as adopting asynchronously, this can not be realized.

Common logic

Asynchronous will exert an influence on the common logic structure too to reset. If you can't have a match clever, think to because that all FPGA general-purpose register reset /set programming as abilities synchronous asynchronous, so the designer may think that it is nothing improper to use asynchronously and is restored to the throne. But this kind of assumption is usually Improper. If asynchronous to reset without being used,then set /can put as synchronous logic to last logic. In this case, can release extra resources and is used in logic to optimize.

In order to understand better asynchronously that resets how to influence optimizing the result, let's see the following some code examples not so ideal:

1 of VHDL example #

process (CLK, RST)

begin

if (RST = '1') then

Q

elsif (CLK'event and CLK = '1') then

Q

end if;

end process;

1 of Verilog example #

always @ (posedge CLK, posedge RST)

if (RESET)

Q

else

Q