eive-tmtc/pus_tc/devs/ccsds_handler.py

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# -*- coding: utf-8 -*-
"""
@file ccsds_handler.py
@brief Test commanding of CCSDS Handler
@author J. Meier
@date 20.11.2021
"""
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import struct
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from spacepackets.ecss.tc import PusTelecommand
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from tmtccmd.tc import DefaultPusQueueHelper
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from tmtccmd.util import ObjectIdU32
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class CommandIds:
# Configures input rate of syrlinks to 400 Khz (results in downlink rate of 200 kbps)
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SET_LOW_RATE = 0
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# Configures input rate of syrlinks to 2000 Khz (results in downlink rate of 1000 kbps)
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SET_HIGH_RATE = 1
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# Enables the syrlinks transmitter (by using RS485 enables lines)
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EN_TRANSMITTER = 2
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# Disables the syrlinks transmitter (by using RS485 enables lines)
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DIS_TRANSMITTER = 3
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# Sets an arbitrary bitrate. Normally only set low and set high rate commands should be
# required
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ARBITRARY_BITRATE = 4
ENABLE_TX_CLK_MANIPULATOR = 5
DISABLE_TX_CLK_MANIPULATOR = 6
# Tx data will be updated on rising edge of tx clock
UPDATE_ON_RISING_EDGE = 7
# Tx data will be updated on falling edge of tx clock
UPDATE_ON_FALLING_EDGE = 8
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def pack_ccsds_handler_test(
object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_code: str
):
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obyt = object_id.as_bytes
q.add_log_cmd(f"Testing CCSDS handler with object id: {object_id.as_hex_string}")
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if op_code == "0":
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q.add_log_cmd("CCSDS Handler: Set low rate")
command = obyt + struct.pack("!I", CommandIds.SET_LOW_RATE)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "1":
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q.add_log_cmd("CCSDS Handler: Set high rate")
command = obyt + struct.pack("!I", CommandIds.SET_HIGH_RATE)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "2":
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q.add_log_cmd("CCSDS Handler: Enables the transmitter")
command = obyt + struct.pack("!I", CommandIds.EN_TRANSMITTER)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "3":
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q.add_log_cmd("CCSDS Handler: Disables the transmitter")
command = obyt + struct.pack("!I", CommandIds.DIS_TRANSMITTER)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "4":
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q.add_log_cmd("CCSDS Handler: Set arbitrary bitrate")
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bitrate = int(input("Specify bit rate (bps): "))
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command = (
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obyt
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+ struct.pack("!I", CommandIds.ARBITRARY_BITRATE)
+ struct.pack("!I", bitrate)
)
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q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "5":
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q.add_log_cmd("CCSDS Handler: Enable tx clock manipulator")
command = obyt + struct.pack("!I", CommandIds.ENABLE_TX_CLK_MANIPULATOR)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "6":
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q.add_log_cmd("CCSDS Handler: Disable tx clock manipulator")
command = obyt + struct.pack("!I", CommandIds.DISABLE_TX_CLK_MANIPULATOR)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "7":
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q.add_log_cmd("CCSDS Handler: Update tx data on rising edge of tx clock")
command = obyt + struct.pack("!I", CommandIds.UPDATE_ON_RISING_EDGE)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
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if op_code == "8":
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q.add_log_cmd("CCSDS Handler: Update tx data on falling edge of tx clock")
command = obyt + struct.pack("!I", CommandIds.UPDATE_ON_FALLING_EDGE)
q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))