Which one should I choose? DSP vs ARM with DSP functions-EEWORLD

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　　Recently, in a project in the field of industrial control, I saw that the early engineering designers designed a pairing of Cortex-M3 microprocessor and TI DSP to complete the entire project. "Why not use the Cortex-M4 core?" This question immediately popped up. Today, I carefully checked and made a simple comparison for the reference of the majority of netizens.

Which one should I choose? DSP vs ARM with DSP functions

　　The above are just a few points. The main frequency of STM32F407 is three times that of DSP , which makes up for the shortcomings of floating-point operations to a certain extent. The relatively low price not only greatly saves the total cost of the project, but also makes it easier for engineers with ARM development experience to control DSP algorithms.

　　After all, it is an application in the field of industrial control. Cortex-M4 can give full play to its advantages in process control. Its rich IO pins and compatible 5v TTL level make it easy to connect with peripheral devices. However, compared with the DSP's IO port that is prone to breakdown, the interface of Cortex-M4 is far better than that of DSP.

　　However, we have to say that DSP still has traditional advantages, such as PWM waves. In Cortex-M4, although the PWM modulation waves are already very rich, this is only compared with similar ARM processors. The high-precision ePWM waves of DPS are still unmatched by Cortex-M4 to a certain extent.

　　For an enterprise, the issue of authenticity cannot be ignored. The legendary DSP compilation environment CCSv5 requires a relatively high licensing fee. This is still a big obstacle to reducing the project cost of enterprises. In comparison, the ARM development environment is still relatively easy to copy . The official development kit of STM32F407 even provides an online debugger, which indirectly helps enterprises solve certain authenticity issues.

　　With the continuous updates of Cortex-M4, I believe that in the future motion control field, Cortex-M4 will occupy the original DSP territory. Wait and see...

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