Device architecture in startup

[darnaiadam]

Hi everyone,

I'd like to make my own bootloader for frdmk64 dev. board, and I saw that in the SDK startup, that is take place in /platform/devices/MK64F12/GCC/, the architecture is defined as ARMV7-M instead of ARMV7E-M. I'm not really sure about the effects but if I'm right, the ARMV7-M is for Cortex-M3 core and ARMV7E-M is for Cortex-m4. Can you please tell my the difference between them, and the reason, why is the wrong architecture included?

[jeremyzhou · Accepted solution]

Hi,

The Cortex -M3 and Cortex-M4 processors are two of the products in the ARM  Cortex-M processor family. The whole Cortex-M processor family is shown in following figure.
The Cortex-M3 and Cortex-M4 processors are based on ARMv7-M architecture.
So the startup files is suit for the K64.

Have a great day,
Ping

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------