Being Rumplestiltskin...

I haven't really been asleep for 20 years, just the last 2 weeks... Back to work today.

Trying to get reoriented...

Darrel & Tyler are here; giving them some tips on the VHDL coding for the output stub module for the pulse form digitizer...

I am currently adding the following PIOs to the Nios SOPC system in my test project in C:\LOCAL\FEDM_gelware\COSMICi-mods\Stratix-TDC-V1:

• icdp_ctrl (Input Capture Datapath Control) - 8 bits, output.  For controlling the datapath.
  
  - Bit #0:  RUN_PAUSEn - Pause the whole datapath (0), or let it run normally (1).
  - Bit #1:  PUMP_DATA - Rise = pull next word.  Fall = done with word.
  - Bits #2-7:  Reserved for possible future use.
  
  
• icdp_stat (Input Capture Datapath Status) - 8 bits, input, with synchronous rising-edge capture IRQs with single-bit reset for the edge capture register.  This will allow the CPU to independently manage interrupts on each of the kinds of events that can occur.
  
  - Bit #0:  BUF_FULL - Datapath is stalled b/c FIFO buffer is full (1), or not (0).
  - Bit #1:  HAVE_DATA - Data is available to be pulled (1), or none is left (0).
  - Bits #2-7:  Reserved for possible future use.
  
  
• icdp_data (Input Capture Datapath Data) -32 bits, input.  No interrupts.

Re-generated the design files.  Now working on re-wiring the top-level schematic to add the new Nios system, and wire it up to the PMT_IC_Datapath module.  That's done.


The guys got their output module to the point of testing, and identified another 6 output pins to use so that they can display the input pulse alongside the output data.

There is some unexpected high-frequency glitching of the data from the output stub; not yet diagnosed.

There was a misunderstanding about I wanted WRT the output data; that is  being fixed.

For me to do tomorrow: 

1. Import their (the students') input stub (which is working) to my top-level schematic, to feed test inputs into the input capture datapath;
   
2. Start slapping together the C code to drive the PMT input capture datapath, and output diagnostic information to the JTAG stdout, and formatted data to the serial port.