How can I use DSP in Kinetis K40 MCU?
All the DSP instructions and documentation can be found on the ARM website.
Here is the latest reference manual for the M4 that has the DSP instructions with cycle times: http://infocenter.arm.com/help/topic/com.arm.doc.ddi0439c/DDI0439C_cortex_m4_r0p1_trm.pdf
And the assembly instructions are described in detail in this document: http://infocenter.arm.com/help/topic/com.arm.doc.dui0553a/DUI0553A_cortex_m4_dgug.pdf
You can also find the ARM CMSIS (Cortex Microcontroller Software Interface Standard) DSP 2.0 Library at http://www.onarm.com/
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