The ARM Cortex M4 is quite an amazing core, actually. The DSP instruction set is beautiful in its simplicity, and the best part is the table with clock cycles p

The ARM Cortex M4 is quite an amazing core, actually. The DSP instruction set is beautiful in its simplicity, and the best part is the table with clock cycles per instruction ("1" in all rows). On a related note, I wonder — the OP used a Freescale Kinetis microcontroller, those begin at around $2.50 at Farnell. Meanwhile, Texas Instruments still hasn't began distributing their Tiva (formerly Stellaris) chips, with the M4F core. I wonder when they'll finally get around to it, and whether the pricing will be competitive with Kinetis.