Add CEP nof longword constants for payload and packet.

applications/lofar2/libraries/sdp/src/vhdl/sdp_pkg.vhd

@@ -115,9 +115,11 @@ PACKAGE sdp_pkg is
   CONSTANT c_sdp_N_clk_per_sync       : NATURAL := c_sdp_f_adc_MHz*10**6;  -- Default 200M clock cycles per second
   CONSTANT c_sdp_N_clk_sync_timeout   : NATURAL := c_sdp_f_adc_MHz*10**6 + c_sdp_f_adc_MHz*10**5;  -- 10% margin.
   CONSTANT c_sdp_N_sync_jesd          : NATURAL := c_sdp_S_pn * c_sdp_N_sync_rcu / c_sdp_S_rcu; -- = 4, nof JESD IP sync outputs per PN
-  CONSTANT c_sdp_f_sub_Hz             : REAL := REAL(c_sdp_f_adc_MHz * 10**6) / REAL(c_sdp_N_fft);
+  CONSTANT c_sdp_f_sub_Hz             : REAL := REAL(c_sdp_f_adc_MHz * 10**6) / REAL(c_sdp_N_fft);  -- = 195312.5
   CONSTANT c_sdp_N_int                : NATURAL := c_sdp_f_adc_MHz * 10**6;  -- nof ADC sample periods per 1 s integration interval
   CONSTANT c_sdp_N_int_sub            : REAL := c_sdp_f_sub_Hz;  -- nof subband sample periods per 1 s integration interval
+  CONSTANT c_sdp_N_int_sub_lo         : NATURAL := NATURAL(FLOOR(c_sdp_N_int_sub));  -- = 195312
+  CONSTANT c_sdp_N_int_sub_hi         : NATURAL := NATURAL(CEIL(c_sdp_N_int_sub));  -- = 195313
   CONSTANT c_sdp_A_pn                 : NATURAL := c_sdp_S_pn / c_sdp_N_pol;  -- = 6 dual pol antenna per PN, is 6 signal input pairs
   CONSTANT c_sdp_P_pfb                : NATURAL := c_sdp_S_pn / c_sdp_Q_fft;  -- = 6 PFB units, for 6 signal input pairs
   CONSTANT c_sdp_T_adc                : TIME    := (10**6 / c_sdp_f_adc_MHz) * 1 ps;  -- = 5 ns @ 200MHz
@@ -308,8 +310,9 @@ PACKAGE sdp_pkg is
   END RECORD;
 
   -----------------------------------------------------------------------------
-  -- Beamlet output via 10GbE to CEP (= central processor)
+  -- Beamlet output via 10GbE to CEP (= central processor, see ICD STAT-CEP)
   -----------------------------------------------------------------------------
+  CONSTANT c_sdp_cep_version_id        : NATURAL := 5;
   CONSTANT c_sdp_marker_beamlets       : NATURAL := 98;  -- = x"62" = 'b'
 
   CONSTANT c_sdp_cep_eth_dst_mac       : STD_LOGIC_VECTOR(47 DOWNTO 0) := x"00074306C700"; -- 00074306C700 = DOP36-eth0
@@ -321,13 +324,16 @@ PACKAGE sdp_pkg is
   CONSTANT c_sdp_cep_udp_dst_port      : STD_LOGIC_VECTOR(15 DOWNTO 0) := TO_UVEC(5000, 16);  -- 0x1380 = 5000
   CONSTANT c_sdp_cep_udp_src_port_15_8 : STD_LOGIC_VECTOR( 7 DOWNTO 0) := x"D0";        -- 15:8, 7:0 = gn_id (= ID[7:0] = backplane[5:0] & node[1:0])
 
-  CONSTANT c_sdp_cep_app_header_len    : NATURAL := 32;
+  CONSTANT c_sdp_cep_app_header_len    : NATURAL := 32;  -- octets, see ICD STAT-CEP
+  CONSTANT c_sdp_cep_header_len        : NATURAL := 14 + 20 + 8 + c_sdp_cep_app_header_len;  -- = eth + ip + udp + app = 74 octets, see ICD STAT-CEP
 
-  CONSTANT c_sdp_cep_version_id             : NATURAL := 5;
-  CONSTANT c_sdp_cep_nof_blocks_per_packet  : NATURAL := 4;
+  CONSTANT c_sdp_cep_nof_blocks_per_packet     : NATURAL := 4;  -- number of time blocks of beamlets per output packet
   CONSTANT c_sdp_cep_nof_beamlets_per_block    : NATURAL := c_sdp_S_sub_bf; -- number of dual pol beamlets (c_sdp_N_pol_bf = 2)
+  CONSTANT c_sdp_cep_nof_beamlets_per_longword : NATURAL := 2;  -- 2 dual pol, complex, 8bit beamlets fit in 1 64bit longword
+  CONSTANT c_sdp_cep_payload_nof_longwords     : NATURAL := c_sdp_cep_nof_blocks_per_packet * c_sdp_cep_nof_beamlets_per_block / c_sdp_cep_nof_beamlets_per_longword;  -- = 976
+  CONSTANT c_sdp_cep_packet_nof_longwords      : NATURAL := ceil_div(c_sdp_cep_header_len, c_longword_sz) + c_sdp_cep_payload_nof_longwords; -- without tail CRC, the CRC is applied by 10GbE MAC
 
-  CONSTANT c_sdp_cep_nof_hdr_fields : NATURAL := 3+12+4+18+1; -- 592b; 9.25 64b words
+  CONSTANT c_sdp_cep_nof_hdr_fields : NATURAL := 3+12+4+18+1;  -- c_sdp_cep_header_len / c_longword_sz = 74 / 8 = 9.25 64b words = 592b
   CONSTANT c_sdp_cep_hdr_field_sel  : STD_LOGIC_VECTOR(c_sdp_cep_nof_hdr_fields-1 DOWNTO 0) := "101"&"111111111001"&"0111"&"1100"&"00000010"&"000110"&"0";  -- 0=data path, 1=MM controlled TODO
 --CONSTANT c_sdp_cep_hdr_field_sel  : STD_LOGIC_VECTOR(c_sdp_cep_nof_hdr_fields-1 DOWNTO 0) := "100"&"000000010001"&"0100"&"0100"&"00000000"&"101000"&"0";  -- 0=data path, 1=MM controlled TODO