FSW ICD 

Power Interface

Telemetry commands

• POWER_READ_TEMP_CMD 

  • First byte is command, second byte is which temperature thermistor to read.

• POWER_READ_SOLAR_CURRENT_CMD

  • First byte is command, second byte is which current from the solar panels to read.

• POWER_READ_LOAD_CURRENT_CMD

  • First byte is command, second byte is which load current to read.

• POWER_READ_MSB_VOLTAGE_CMD,

  • Main system bus voltage

• POWER_GET_BATTERY_SOC_CMD

  • Receive state of charge estimate 

• POWER_GET_SA_CHARGE_STATE_CMD,

  • Receive solar array charge state 

• POWER_GET_BOOT_COUNT_CMD,

  • Receive boot count

• POWER_FRAM_GET_OPMODE_CMD,

  • Get operating mode stored in non-volatile storage

• POWER_FRAM_GET_SOC_CMD,

  • Get SOC stored in non-volatile storage

• POWER_FRAM_GET_BOOT_COUNT_CMD,

  • Receive stored boot count 

Control commands

• POWER_SET_LOAD_OFF_CMD,

  • Turn off a load switch. The second byte designates which load switch

• POWER_SET_LOAD_ON_CMD,

  • Turn on a load switch. The second byte designates which load switch

• POWER_SET_SOLAR_OFF_CMD,

  • Turn off a load switch connected to the solar arrays. The second byte designates which load switch

• POWER_SET_SOLAR_ON_CMD,

  • Turn off a load switch connected to the solar arrays. The second byte designates which load switch

• POWER_SET_POW_MODE_CMD,

  • Set power board into a specified power mode. Second byte of this command is which power mode to set

Payload Interface

Payload commands will change based on LiBus payload

ADCS Interface

Telemetry commands

• ADCS_GET_MEASUREMENT_GYRO_CMD

  • Receive a single gyroscope measurement

• ADCS_GET_MEASUREMENT_MAGNETOMETER_CMD

  • Receive a single magnetometer measurement

• ADCS_SUN_SENSOR_SELECT_CMD

  • Used to switch between primary and backup sun sensors. Second byte in this command is which sun sensor to select

• ADCS_GET_MEASUREMENT_SUN_CMD

  • Receive a single sun sensor measurement

• ADCS_GET_SUN_POINTING_TM_CMD

  • Commands spacecraft to generate and transmit sun pointing telemetry

    • Earth vector, sun vector, sun sensor pixel values

• ADCS_GET_ECLIPSE_TIME_CMD

  • Replies with next scheduled eclipse time

Control commands

• ADCS_SET_TR_STATE_CMD

  • Used to activate/deactivate torque rods remotely.

• ADCS_SET_TR_POLARITY_CMD

  • Used to set the polarity of torque rods

• ADCS_SET_TR_PWM_CMD

  • Used to directly set the PWM of torque rods.

  • Requires 2 additional input parameters - which torque rod to set and the PWM value to set to

• ADCS_SET_GYRO_I2C_ADDRESS_CMD

  • Used to switch between primary and backup IMU - backup IMU has a different address

• ADCS_SET_ECLIPSE_TIME_CMD

  • Schedules the next eclipse time 

Operational commands

• ADCS_PING_CMD

  • Send and receive a single byte to ADCS over SPI.

• ADCS_SPI_SYNC_CMD

  • As SPI is a synchronous protocol, this transmits empty frames until ADCS is synchronized with CDH.

CDH Interface

Operations commands

• CDH_SCHEDULE_TTT_CMD

  • Schedules a time-tagged task. Any command in this document can be scheduled as a time-tagged task. This command has two arguments:

    • Time to execute task

    • Task to execute and task parameters (if applicable)

• CDH_SET_TIME_CMD

  • Sets the current time on CDH to a specified time provided

• CDH_SET_DEPLOYMENT_STARTUP_STATE_CMD

  • Set CDH into deployment state

• CDH_SET_DETUMBLING_STARTUP_STATE_CMD

  • Set CDH into detumbling state

• CDH_CLEAR_REBOOT_REASON_CMD

  • If a uncommanded reboot occurs, a flag is held until cleared with this command

• CDH_FORCE_FW_STATE_CMD

  • Force a firmware update state

• CDH_SET_FW_ARM_TIMEOUT_CMD

  • Adjust the remote update timeout time

• CDH_WATCHDOG_DISABLE_CMD

  • Disable the hardware watchdog

• CDH_RQST_PWR_RESET_LOAD_CMD

  • Requests that the power subsystem power-cycles the CDH board

Firmware update commands

• CDH_FW_IDLE_CMD

  • Set the IDLE state

• CDH_FW_RX_FW_CMD

  • Set the RX_FW state

• CDH_FW_PRE_VER_CMD

  • Run the pre-verify routine

• CDH_FW_ARM_CMD

  • Arm CDH for update

• CDH_FW_EXECUTE_CMD

  • Begin update

• CDH_FW_EXECUTE_CONFIRM_CMD

  • Confirm update

• CDH_FW_POST_VER_CMD

  • Verify update version is correct after update

Telemetry commands

• CDH_GET_TIME_CMD

  • Replies with the current time on CDH

• CDH_DOWNLOAD_LOG_FILE_CMD

  • Downloads a log file stored in non-volatile storage. Requires an argument for which filename to download

• CDH_LIST_FILES_CMD

  • Lists files currently stored in non-volatile storage

• CDH_LIST_FW_CMD

  • Lists firmware images stored in boot rom

• CDH_GET_SPACECRAFT_STATUS_CMD,

• CDH_GET_HW_STATUS_CMD,

Data management commands

• CDH_FW_PUT_DATA_CMD,

• CDH_FW_GET_STATE_CMD,

• CDH_CHECKSUM_FILE_CMD,

• CDH_MV_FILE_CMD,

• CDH_RM_FILE_CMD,

• CDH_CP_FILE_CMD,

• CDH_CHECKSUM_PGRM_FLASH_CMD,

• CDH_CP_TO_PGRM_FLASH_CMD,

• CDH_GET_SW_VER_CMD,

• CDH_GET_DES_VER_CMD,

• CDH_GET_SPI_DIR_CMD,

• CDH_GET_FS_FREE_SPACE_CMD,

• CDH_FW_UPDATE_SPI_DIR_CMD,

• CDH_FW_CREATE_SPI_DIR_CMD,

• CDH_WRITE_PROG_FLASH_CMD,

• CDH_ERASE_PROG_FLASH_CMD,

• CDH_RESET_FW_MNGR_CMD,

• CDH_FW_SET_CHECKSUM_CMD,

• CDH_FW_SET_DESVER_CMD,

• CDH_FORMAT_FS_CMD,

• CDH_RESET_SYSTEM_CMD,

• CDH_FW_RX_PROGRESS_CMD,

• CDH_FW_PUT_DATA_2_CMD,

• CDH_CHECKSUM_FILE_PART_CMD,

• CDH_FILE_WRITE_CMD,

• CDH_FILE_INSERT_CMD,

• CDH_FILE_DELETE_CMD,

Inter-subsystem commands