SCA core reset in CRU python utilities

O² O² CRU
1

Hi,

could you explain the difference of the following two code sections?
Which one is the correct way of resetting the SCA FPGA core?

https://gitlab.cern.ch/alice-cru/cru-sw/blob/master/COMMON/SCA.py#L28
https://gitlab.cern.ch/alice-cru/cru-sw/blob/master/COMMON/SCA.py#L194

On a side note:
We would prefer it if the init() routines would not already change the state of the hardware. It is quite confusing to simply run, e.g., GBTSC/sw/sca_prg.py, without ‘doing’ anything, but behind the scenes something gets reset in the hardware and stuff magically works again.

Best regards

2

Ciao,
indeed the function

def reset(self, debug = None) :
        """
        RESET the SCA block inside the FPGA
        """
        self.rocWr(self.wr_add_ctr, 0x800000, debug)
        self.rocWr(self.wr_add_ctr, 0x0, debug)

is old and not supported by the firmware anymore.

I used the reset in the init, because when I switch from one gbt CH to another one I want to reset the core.
I will discuss with the other and see if we should remove it.

Thx