Hello Mitch,
Thanks for the help and the speedy reply. If it's not too much trouble,
could you describe any new calling semantics that have changed in the
function rfdc_update_nco_cmd() ??
int rfdc_update_nco_cmd(struct katcp_dispatch *d, int argc)
There is a variable number of arguments present and so we are somewhat
lost. Originally, our requirement for calling *XRFdc_ResetNCOPhase( )*
was motivated by page 195 of PG269. To avoid any bot censors that may be
in Google Groups, I will not post an image, but instead reproduce page 195
below. It is possible we are missing a step. Thanks!
.
*AMD _>^|* Chapter 4: Designing with the core
1. Disable the analog SYSREF receiver with the API command.
SysRefEnable = 0
status_dac|=XRFdc_MTS_Sysref_Config(&InstancePtr,
&DACSyncConfigPtr,&ADCSyncConfigPtr, SysRefEnable)
2. Set the mixer settings, NCO phase reset, QMC, and/or coarse delay.
XRFdc_Mixer_Settings Mixer_Settings; // Declare mixer settings struct
u32 Type = XRFDC_DAC_TILE;
u32 Tile_Id ;
u32 Block_Id ;
u32 Mixer_Settings.EventSource = XRFDC_EVNT_SRC_SYSREF;
// it is assumed other Mixer settings have been previously assigned in the
user code
for (Tile_Id = 0; Tile_Id < 4; Tile_Id++ ) {
for (Block_Id = 0; Block_Id < 4; Block_Id++ ) {
XRFdc_SetMixerSettings(&RFdcInst, Type, Tile_Id,
Block_Id,&Mixer_Settings);
status_dac |= XRFdc_ResetNCOPhase(&RFdcInst,Type,Tile_Id,Block_Id);
// Note that Coarse mixer and QMC could also be part of this for
loop.
}
}
3. Wait for successful return of API calls to ensure all register writes
have been completed.
if (status_dac!=XST_SUCCESS) // Execute error code;
4. Enable the analog SYSREF clock in continuous mode and ensure this clock
is stable.
5. Enable the analog SYSREF receiver with the API command.
SysRefEnable = 1;
status_dac|=XRFdc_MTS_Sysref_Config(&InstancePtr,
&DACSyncConfigPtr,&ADCSyncConfigPtr, SysRefEnable);
6. Wait long enough to ensure a rising edge has been detected, at this
point the update would commence.
7. Disable the analog SYSREF receiver with the API command.
SysRefEnable = 0;
status_dac|=XRFdc_MTS_Sysref_Config(&InstancePtr,
&DACSyncConfigPtr,&ADCSyncConfigPtr, SysRefEnable);
8. Disable the external analog SYSREF clock (optional).
Figure 148:
*Dynamic Update Event Trigger Using SYSREF for Single Device with AC-
orDC-Coupling*
.
On Thursday, February 5, 2026 at 11:23:03 AM UTC-5 Mitchell Burnett wrote:
> Hi Ken,
>
> Just closing the loop here. I did take a look and can confirm that the
> py38 branch for casperfpga at https://github.com/casper-astro/casperfpga had
> already received all the updates necessary for tbs3’s changes.
>
> Mitch
>
>
> On Feb 4, 2026, at 2:52 PM, Mitchell Burnett <[email protected]> wrote:
>
> Ignore the previously suggested branch for caspefpga, the best one to try
> would already be https://github.com/casper-astro/casperfpga py38 branch.
> It had previously been changed to immediately trigger an update or wait for
> some other external event.
>
> Mitch
>
> On Feb 4, 2026, at 2:44 PM, Mitchell Burnett <[email protected]> wrote:
>
> Hi Ken,
>
> A version with your requested change was made last night and can be found
> here: https://casper.groups.et.byu.net/zcu216/zcu216update/. It’s the
> tcpborphserver3_v8.1 file with md5
> checksum 6b9f2c25a7d1c0f34883574a5e0fcb04.
>
> I’m still working on the changes to casperfpga’s rfdc.py to push back.
> But, you may be able to try this branch until I can get some time tonight
> to push it back:
> https://github.com/mitchburnett/casperfpga/tree/rfsocs/rfdc-mts-nco
>
> Hope this helps,
> Mitch
>
> On Jan 29, 2026, at 3:59 PM, Ken Semanov <[email protected]> wrote:
>
> Hello,
>
> We are attempting to perform MTS on a quadtile ZCU216. Our use-case
> requires a call to API function, *XRFdc_ResetNCOPhase( )* At present,
> it does not appear that tcpborphserver3 has functionality for this,
> neither in master branch nor rfsoc/rfdc branch.
>
> Below is a section of rfsoc.c located at
> /alpaca/casper/katcp/-/blob/rfsoc/rfdc/tcpborphserver3/rfsoc.c starting
> line 1413,
>
> int rfdc_update_nco_cmd(struct katcp_dispatch *d, int argc) {
> struct tbs_raw *tr;
> struct tbs_rfdc *rfdc;
> // cmd variables
> int result;
> unsigned int tile, blk;
> XRFdc_Mixer_Settings mixer;
> char* type;
> int converter_type;
> double nco_freq;
> double nco_phase;
> unsigned int trigger_update = 1; // defaulat to force update event
>
> To match our use-case we would make the following modifications.
>
> (1) trigger_update would be moved to a function argument , so that we
> can toggle it. (we believe a call to *XRFdc_UpdateEvent()* at line 1506
> invokes an error by design)
>
> (2) *XRFdc_ResetNCOPhase( )* would be called somewhere after the call
> to *XRFdc_SetMixerSettings()* (line 1498 in rfsoc.c )
>
> Are these modifications possible?
> Thanks for reading!
>
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