Hi Geert and Linus, On Friday, May 12, 2017, Geert Uytterhoeven wrote: > Jacopo, Chris: Would two bits per pin/function (none, input, output, > bidir) > be sufficient? > That makes one u16 per pin. So roughtly 12 ports x 16 pins => 384 bytes. > Plus code to handle it. After all not that bad... OK...I give up! If that's what it takes to get it, I'm fine. NOTE, your math is a little off, the issue is that depending on the function that you use, you might need to do extra settings, so you'd have to have a lookup table for every pin & function. Each pin can have 1 of 8 functions (which is good because a 'byte' has 8 bits). So, 12 ports x 16 pins => 384 bytes (this table would just be for checking if bi-dir is needed) 12 ports x 16 pins => 384 bytes (this table would just be for checking if input is needed) 12 ports x 16 pins => 384 bytes (this table would just be for checking if input is needed) ------------ 1,152 bytes But then...there are package variations so you need another entire table for those parts. 1,152 bytes x 2 = 2,304 bytes However, if these tables are constants, they will reside in flash for the XIP_KERNEL systems, so that's OK. #What we should really do is just make a look-up table (tables) for the 'special' ones. But, we can have that discussion in a different thread. One final note: There is still a need for "input-enable" and "output-enable" for the timer pins. Because, when you choose the pin to be connected to the MTU2 timer, the pin can be used as either input-capture/output-compare/PWM and that's the user's choice. So that's probably a valid usage of the generic pin properties for configuration. Sorry Jacopo, but we'll need another round of patches. It sounds like for sure the bi-direction needs to get ripped back out. Chris ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f