From b2fbe14af7f3b7eb9d851030c02b3f32a1b4b82b Mon Sep 17 00:00:00 2001
From: Marko Mecina <marko.mecina@univie.ac.at>
Date: Wed, 7 Sep 2022 14:09:59 +0200
Subject: [PATCH] add convenience function to calculate parameter CRC
---
Ccs/ccs_function_lib.py | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/Ccs/ccs_function_lib.py b/Ccs/ccs_function_lib.py
index e4e2525..ca4b476 100644
--- a/Ccs/ccs_function_lib.py
+++ b/Ccs/ccs_function_lib.py
@@ -1747,7 +1747,7 @@ def Tcsend_DB(cmd, *args, ack=None, pool_name=None, sleep=0., no_check=False, pk
# @param cmd CCF_DESCR string of the requested TC
# @param args Parameters required by the cmd
# @param ack Override the I-DB TC acknowledment value (4-bit binary string, e.g., '0b1011')
-def Tcbuild(cmd, *args, sdid=0, ack=None, no_check=False, hack_value=None, **kwargs):
+def Tcbuild(cmd, *args, sdid=0, ack=None, no_check=False, hack_value=None, source_data_only=False, **kwargs):
# with self.poolmgr.lock:
que = 'SELECT ccf_type,ccf_stype,ccf_apid,ccf_npars,cdf.cdf_grpsize,cdf.cdf_eltype,cdf.cdf_ellen,' \
'cdf.cdf_value,cpc.cpc_ptc,cpc.cpc_pfc,cpc.cpc_descr,cpc.cpc_pname FROM ccf LEFT JOIN cdf ON ' \
@@ -1824,6 +1824,9 @@ def Tcbuild(cmd, *args, sdid=0, ack=None, no_check=False, hack_value=None, **kwa
pdata = encode_pus(params, *values)
+ if source_data_only:
+ return pdata
+
return Tcpack(st=st, sst=sst, apid=int(apid), data=pdata, sdid=sdid, ack=ack, **kwargs), (st, sst, apid)
@@ -2140,6 +2143,7 @@ def Tmpack(data=b'', apid=321, st=1, sst=1, destid=0, version=0, typ=0, timestam
return tm
+
##
# Generate PUS packet
#
@@ -2524,6 +2528,20 @@ def str_to_num(string, fmt=None):
return num
+def calc_param_crc(cmd, *args, no_check=False, hack_value=None):
+ """
+ Calculates the CRC over the packet source data (excluding the checksum parameter).
+ Uses the same CRC algo as packet CRC and assumes the checksum is at the end of the packet source data.
+ @param cmd:
+ @param args:
+ @param no_check:
+ @param hack_value:
+ @return:
+ """
+ pdata = Tcbuild(cmd, *args, no_check=no_check, hack_value=hack_value, source_data_only=True)
+ return crc(pdata[:-PEC_LEN])
+
+
def tc_load_to_memory(data, memid, mempos, slicesize=1000, sleep=0., ack=None, pool_name='LIVE'):
"""
Function for loading large data to DPU memory. Splits the input _data_ into slices and sequentially sends them
--
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