Some more notes.

applications/lofar2/doc/prestudy/station2_sdp_transient_buffer.txt

@@ -281,6 +281,9 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
     . FPGA_tbuf_signal_input_rsn_R = RSN at sync
       FPGA_tbuf_signal_input_nof_blocks_R : expected value nof_block_per_sync = 100k or 80k
       FPGA_tbuf_signal_input_nof_samples_R : expected value nof_clk_per_sync = 200M or 160M
+          If FPGA_tbuf_signal_input_rsn_R == -1 then either FPGA_processing_enable_R == False
+          or there is or was something wrong with the data path processing clock (dp_clk
+          = 200MHz or 160MHz).
 
   * Record:
     . FPGA_tbuf_record_all_RW[pn]
@@ -289,7 +292,7 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
     . FPGA_tbuf_record_enable_RW[pn]
       FPGA_tbuf_record_enable_R[pn]
           True = start/continue recording, all ai or half of ai (dependent on FPGA_tbuf_record_all_RW)
-          False = stop/freeze recording immediately
+          False = RW: stop/freeze recording immediately, R: recording has stopped
 
   * Recording:
     . FPGA_tbuf_recorded_last_timestamp_R[pn] = reg_recorded_last_rsn_R * T_adc
@@ -328,7 +331,7 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
           - when busy then FPGA_tbuf_memory_read_nof_packets_R increments until it reaches value of
             FPGA_tbuf_dump_nof_packets_R
           - when finished then FPGA_tbuf_memory_remaining_nof_packets_R = 0
-          False = stop dumping packets immediately
+          False = RW: stop dumping packets immediately, R: dumping has stopped
           SDPFW:
           - loops over one or multiple ai
           SC / dump tool:
@@ -366,12 +369,12 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
           Enable output on the pn at end of ring that has interface to CEP.
 
   * 10GbE output monitor:
-    . FPGA_tbuf_output_nof_packets_R[pn]
-          Number of dump packets that have been output while FPGA_tbuf_output_enable_RW = True,
-          reset to 0 when FPGA_tbuf_output_clear_counts_RW = True event
     . FPGA_tbuf_output_clear_counts_RW[pn]
           Use dp_strobe_total_count with MM clear register rather than in_clr = revt(reg_output_enable_RW) and
           rather then dp_bsn_monitor with sync = revt(reg_output_enable_RW).
+          . FPGA_tbuf_output_nof_packets_R[pn]
+              Number of dump packets that have been output while FPGA_tbuf_output_enable_RW = True,
+              reset to 0 when FPGA_tbuf_output_clear_counts_RW = True event
 
   * Memory DDR4:
     With streaming use of io_ddr then the dvr_wr_flush_en = '0' (so ctlr_wr_flush_en = 0 in MP), because
@@ -416,9 +419,12 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
           True = pn is recording, all ai or half of ai (dependent on reg_record_all_RW)
           False = pn is frozen
 
-    . c_tbuf_nof_samples_per_page = c_tbuf_nof_samples_per_packet = 2000
-    . reg_nof_ddr_words_per_page_R = 657 or 329, depends on reg_record_enable_RW
-          SDPTR: ddr_nof_pages = floor(ddr_gigabytes * 1024**3 / (reg_nof_ddr_words_per_page_R * ctrl_nof_bytes_per_ddr_word)
+      Constants, signals:
+      . c_tbuf_nof_samples_per_page = c_tbuf_nof_samples_per_packet = 2000
+      . nof_ddr_words_per_page = 657 or 329, depends on reg_record_enable_RW
+          SDPTR: ddr_nof_pages = floor(ddr_gigabytes * 1024**3 / (nof_ddr_words_per_page * ctrl_nof_bytes_per_ddr_word)
+          . Moet SDPTR dit weten, heeft SDPTR dit nodig? --> Nee want SPDTR hoeft alleen pages/blocks/packets
+            te kennen, omdat SDPFW conversie van page/address doet.
 
     . reg_recorded_first_page_R
           freezes when recording stops by reg_record_enable_RW = False,
@@ -478,14 +484,14 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
           amount of packets that have been read correctly and were passed on to ring
           = reg_memory_read_nof_packets_R - reg_memory_read_nof_errors_R
 
-      FPGA_tbuf_memory_read_nof_packets_R[pn][ai] = reg_memory_read_nof_packets_R
-      FPGA_tbuf_memory_dropped_nof_packets_R[pn][ai] = reg_memory_read_nof_errors_R
-      FPGA_tbuf_memory_remaining_nof_packets_R[pn][ai] = reg_memory_remaining_nof_packets_R
-      FPGA_tbuf_memory_dumped_nof_packets_R[pn][ai] = reg_memory_dumped_nof_packets_R
 
-      FPGA_tbuf_memory_clear_counts[pn]
+      FPGA_tbuf_memory_clear_counts_RW[pn]
           Use dp_strobe_total_count with MM clear register, rather than in_clr = revt(reg_dump_enable_RW)
           to clear all reg_memory_* counters.
+          . FPGA_tbuf_memory_read_nof_packets_R[pn][ai] = reg_memory_read_nof_packets_R
+          . FPGA_tbuf_memory_dropped_nof_packets_R[pn][ai] = reg_memory_read_nof_errors_R
+          . FPGA_tbuf_memory_remaining_nof_packets_R[pn][ai] = reg_memory_remaining_nof_packets_R
+          . FPGA_tbuf_memory_dumped_nof_packets_R[pn][ai] = reg_memory_dumped_nof_packets_R
 
     . reg_dump_enable_RW[ai]
           True = start / keep dumping packets for the requested ai,
@@ -514,6 +520,9 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
 * Enable output:
   . write FPGA_tbuf_output_enable_RW = True for pn that has the 10GbE interface to CEP
 
+* Prepare dumping:
+  . write FPGA_tbuf_dump_inter_packet_time_RW
+
 * Prepare recording:
   . write FPGA_tbuf_reg_record_all_RW
 
@@ -538,7 +547,7 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
 
     * Clear counts:
       . write FPGA_tbuf_output_clear_counts_RW = True to clear FPGA_tbuf_output_nof_packets_R
-      . write FPGA_tbuf_memory_clear_counts = True to clear FPGA_tbuf_memory_*_R counts
+      . write FPGA_tbuf_memory_clear_counts_RW = True to clear FPGA_tbuf_memory_*_R counts
 
     * Prepare dump:
       . write FPGA_tbuf_dump_start_timestamp_RW to request start time of dump interval
@@ -564,7 +573,7 @@ The CP FPGA_beamlet_output_nof_beamlets_RW is not supported in SDPTR and SDPFW y
       . write FPGA_tbuf_dump_enable_RW = False to force stop dumping from pn
 
     * Monitor dump results:
-      . read packet counts:
+      . read packet counts (or use for ai loop instead of sum):
         N_remaining = sum(FPGA_tbuf_memory_remaining_nof_packets_R[pn][ai])
         N_read = sum(FPGA_tbuf_memory_read_nof_packets_R[pn][ai])
         N_dropped = sum(FPGA_tbuf_memory_dropped_nof_packets_R[pn][ai])