W7500 vs W7500P : is detection possible at runtime or via SWD

Question

I want to detect what kind of chip I have on my SWD chain. (a W7500 a W7500P or some other cortex m0) Using st-link and gdb I can read the CPU ID Base register (as shown on page 220 of the The Definitive Guide to ARM ® Cortex ® -M0 and Cortex-M0+ Processors Second Edition Joseph Yiu) (gdb) x 0xe000ed00 0xe000ed00: 0x410cc200 The current release of the Cortex-M0 processor (r0p0) has CPU ID values of 0x410CC200 So it is a cortex m0, but is it a W7500 or W7500P (which needs different firmware version because I/O is mapped differently) ? What register can I read (using SWD) to tell me what chip I have? Thanks, Edwin van den Oetelaar

lawrence · Answer

Hello, oeretelaar Thank you for your interest. Simply, we wrote it down on Chip. So… I really recommend you to check it… Because there is no register to notice chip id… So, it will so annoyed to find out… you will find out with firmware… I think BOOT pin is easier than others… So sorry about it… Thank you lawrence