exo_sw_dissectors/Dissector/error_handler_dissector.lua

function error_handler_dissectors(buffer, pinfo, tree, TC_TM_PROTOCOL, offset, num_of_instance)


-- Define the fields of the protocol
--local f_fault_status_ind = ProtoField.uint8("TC_TM_PROTOCOL.fault_status_ind", "Fault Status Indication", base.HEX)
local f_total_error_groups = ProtoField.uint8("TC_TM_PROTOCOL.total_error_groups", "Total Number of Error code present Groups", base.DEC)

-- Define the fields for each error group and fault status
local f_error_group_io = ProtoField.uint8("TC_TM_PROTOCOL.error_group_io", "Total Number of Error code present in IO", base.DEC)
local f_fault_status_io = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_io", "Fault Status of Group IO", base.HEX)

local f_error_group_ahw_set_1 = ProtoField.uint8("TC_TM_PROTOCOL.error_group_ahw_set_1", "Total Number of Error code present in AHW_SET-1", base.DEC)
local f_fault_status_ahw_set_1 = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_ahw_set_1", "Fault Status of Group AHW_SET-1", base.HEX)

local f_error_group_ahw_set_2 = ProtoField.uint8("TC_TM_PROTOCOL.error_group_ahw_set_2", "Total Number of Error code present in  AHW_SET-2", base.DEC)
local f_fault_status_ahw_set_2 = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_ahw_set_2", "Fault Status of Group AHW_SET-2", base.HEX)

local f_error_group_system_1 = ProtoField.uint8("TC_TM_PROTOCOL.error_group_system_1", "Total Number of Error code present in SYSTEM Group 1", base.DEC)
local f_fault_status_system_1 = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_system_1", "Fault Status of Group SYSTEM 1", base.HEX)

local f_error_group_system_2 = ProtoField.uint8("TC_TM_PROTOCOL.error_group_system_2", "Total Number of Error code present in SYSTEM Group 2", base.DEC)
local f_fault_status_system_2 = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_system_2", "Fault Status of Group SYSTEM 2", base.HEX)

local f_error_group_comms = ProtoField.uint8("TC_TM_PROTOCOL.error_group_comms", "Total Number of Error code present in COMMS", base.DEC)
local f_fault_status_comms = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_comms", "Fault Status of Group COMMS", base.HEX)

local f_error_group_adcs = ProtoField.uint8("TC_TM_PROTOCOL.error_group_adcs", "Total Number of Error code present in ADCS", base.DEC)
local f_fault_status_adcs = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_adcs", "Fault Status of Group ADCS", base.HEX)

local f_error_group_eps = ProtoField.uint8("TC_TM_PROTOCOL.error_group_eps", "Total Number of Error code present in EPS", base.DEC)
local f_fault_status_eps = ProtoField.uint32("TC_TM_PROTOCOL.fault_status_eps", "Fault Status of Group EPS", base.HEX)

-- Add all fields to the protocol
TC_TM_PROTOCOL.fields = {
    f_total_error_groups,
    f_error_group_io, f_fault_status_io,
    f_error_group_ahw_set_1, f_fault_status_ahw_set_1,
    f_error_group_ahw_set_2, f_fault_status_ahw_set_2,
    f_error_group_system_1, f_fault_status_system_1,
    f_error_group_system_2, f_fault_status_system_2,
    f_error_group_comms, f_fault_status_comms,
    f_error_group_adcs, f_fault_status_adcs,
    f_error_group_eps, f_fault_status_eps
}

    -- Create a subtree for the protocol
    local subtree = tree:add(TC_TM_PROTOCOL, buffer(), "ERROR HANDLER")
    
    for i = 0,  num_of_instance - 1 do
    
    local subtree1 = subtree:add(TC_TM_PROTOCOL, buffer(), "INSTANCE "..i)

    -- Fault Status Indication (1 byte)
    --subtree1:add(f_fault_status_ind, buffer(offset, 1):le_uint())
    --offset = offset + 1

    -- Total Number of Error Groups (1 byte)
    subtree1:add(f_total_error_groups, buffer(offset, 1):le_uint())
    offset = offset + 1

    -- Dissect each error group based on the description
    -- Group IO
    local error_group_io = buffer(offset, 1):le_uint()
    subtree1:add(f_error_group_io, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local err_io_def = {
    "ERR_IO_I2C_FAIL",
    "ERR_IO_SPI_FAIL",
    "ERR_IO_CAN_FAIL",
    "ERR_IO_UART_FAIL",
    "ERR_IO_QSPI_FAIL",
    "ERR_IO_MAX"
}

    local temp
    local temp1
    temp = buffer(offset, 4):le_uint()
    for i = 1 , error_group_io  do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_io, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i - 1,err_io_def[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_io, temp):set_text(string.format("ERROR CODE %d : FAULT",i - 1,err_io_def[i]))
      end
    end
    offset = offset + 4
    
    -- Group AHW_SET-1
    local error_group_ahw_set_1 = buffer(offset, 1):uint()
    subtree1:add(f_error_group_ahw_set_1, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    
    local err_ahw_def_set_1 = {
    "ERR_IMU_BMX160_OBC_1",
    "ERR_IMU_BMX160_OBC_2",
    "ERR_IMU_BMX160_XXX",
    "ERR_DIGITAL_THERMOSTAT_DS620_EDGE",
    "ERR_DIGITAL_THERMOSTAT_DS620_PS",
    "ERR_HSC_ADM1176_EDGE",
    "ERR_HSC_ADM1176_PS_2",
    "ERR_HSC_ADM1176_PS_1",
    "ERR_TEMP_SENSOR_MCP9843_OBC",
    "ERR_TEMP_SENSOR_MCP9843_PS",
    "ERR_TEMP_SENSOR_MCP9843_EDGE",
    "ERR_TEMP_SENSOR_MCP9843_GPS",
    "ERR_TEMP_SENSOR_MCP9843_SPE01",
    "ERR_TEMP_SENSOR_MCP9843_SPE02",
    "ERR_TEMP_SENSOR_MCP9843_SPW01",
    "ERR_TEMP_SENSOR_MCP9843_SPW02",
    "ERR_TEMP_SENSOR_MCP9843_SPB01",
    "ERR_PSM_INA230_OBC",
    "ERR_PSM_INA230_PS",
    "ERR_GPIO_EXPANDER_PCAL6408A_PS",
    "ERR_GPIO_EXPANDER_MCP23008_EDGE_1",
    "ERR_GPIO_EXPANDER_MCP23008_EDGE_2",
    "ERR_GPIO_EXPANDER_MCP23008_OBC_1",
    "ERR_GPIO_EXPANDER_MCP23008_OBC_2",
    "ERR_GPIO_EXPANDER_MCP23008_GPS",
    "ERR_THRUSTER_MORPHEUS_OBC",
    "ERR_VOLTAGE_SEQUENCER_UCD9801_OBC",
    "ERR_DATA_LOGGER_ADS7828_PS",
    "ERR_EXT_MEM_MX25L512_QSPI",
    "ERR_EXT_MEM_MT25QL512_QSPI",
    "ERR_EXT_MEM_S25HL512T_QSPI",
    "ERR_EXT_MEM_MT28EW128_FMC",
    "ERR_AHW_ONE_MAX"
}

    temp = buffer(offset, 4):le_uint()
    for i = 1 , error_group_ahw_set_1 do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then 
       subtree1:add(f_fault_status_ahw_set_1, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i-1,err_ahw_def_set_1[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_ahw_set_1, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i-1,err_ahw_def_set_1[i]))
       end
   end
   offset = offset + 4

    -- Group AHW_SET-2
    local error_group_ahw_set_2 = buffer(offset, 1):uint()
    subtree1:add(f_error_group_ahw_set_2, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local err_ahw_def_set_2 =
    {
	    "ERR_UART_EXPANDER_MAX14830_OBC",
	    "ERR_AHW_TWO_MAX"
    }
    
    temp = buffer(offset, 4):le_uint()
    for i = 1 , error_group_ahw_set_2 do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_ahw_set_2, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i - 1,err_ahw_def_set_2[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_ahw_set_2, temp):set_text(string.format("ERROR CODE %d : FAULT",i - 1,err_ahw_def_set_2[i]))
       end
    end
   offset = offset + 4
   
local err_system_def = {
    "ERR_IRAM_HEAP_FREE_LESSER_THAN_16K",
    "ERR_IRAM_HEAP_FREE_LESSER_THAN_8K",
    "ERR_ERAM_HEAP_FREE_LESSER_THAN_16K",
    "ERR_ERAM_HEAP_FREE_LESSER_THAN_8K",
    "ERR_CMALLOC_FREE_LESSER_THAN_4K",
    "ERR_OBC_FW_UPDATE_FAIL",
    "ERR_SYS_MAX"
}


    -- Group SYSTEM 1
    local error_group_system_1 = buffer(offset, 1):uint()
    subtree1:add(f_error_group_system_1, buffer(offset, 1):le_uint())
    offset = offset + 1
    
     temp = buffer(offset, 4):le_uint()
    for i = 1, error_group_system_1  do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_system_1, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i - 1,err_system_def[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_system_2, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i - 1,err_system_def[i]))
       end
    end
   offset = offset + 4    

    -- Group SYSTEM 2
    local error_group_system_2 = buffer(offset, 1):uint()
    subtree1:add(f_error_group_system_2, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local err_services_def =
    {
	    "ERR_SER_1",
	    "ERR_SER_MAX"
    }

     temp = buffer(offset, 4):le_uint()
    for i = 1, error_group_system_2  do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_system_2, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i - 1,err_services_def[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_system_2, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i - 1,err_services_def[i]))
       end
    end
   offset = offset + 4    


    -- Group COMMS
    local error_group_comms = buffer(offset, 1):uint()
    subtree1:add(f_error_group_comms, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    
    local err_comms_modules_def =
    {
		"ERR_COMMS_PKT_DROP",
		"ERR_COMMS_PKT_LEN_MISMATCH",
		"ERR_COMMS_SBAND_BUSY",
		"ERR_COMMS_SBAND_TCP_READ_FAIL",
		"ERR_COMMS_SBAND_TCP_CONNECTION_FAIL",
		"ERR_COMMS_SBAND_OFF_VOLT_TEMP_EXCEED",
		"ERR_COMMS_NACK_RCV_UHF",
		"ERR_COMMS_RESTART_UHF",
		"ERR_COMMS_SBAND_RSP_CMD",
		"ERR_COMMS_SBAND_BUSY_TCP_WRITE",
		"ERR_COMMS_SBAND_READ_UDP_RX_FAIL",
		"ERR_COMMS_SBAND_UDP_TX_CONNECTION_FAIL",
		"ERR_COMMS_SBAND_SEND_UDP_TX_FAIL",
		"ERR_COMMS_SBAND_READ_UDP_TX_FAIL",
		"ERR_COMMS_SBAND_FW_UPD_FAIL",
		"ERR_COMMS_UHF_RSP_TIMEOUT",
		"ERR_COMMS_SBAND_CFG_STE_SET_RESET_FAIL",
		"ERR_COMMS_SBAND_CFG_GET_FEATURE_SELECT_FAIL",
		"ERR_COMMS_SBAND_CFG_GET_DEVICE_CFG_FAIL",
		"ERR_COMMS_SBAND_CFG_SET_DEVICE_CFG_FAIL",
		"ERR_COMMS_SBAND_CFG_SET_DEVICE_CFG_RX_TX_ON_FAIL",
		"ERR_COMMS_SBAND_CFG_SET_IP_ADR_CFG_FAIL",
		"ERR_COMMS_SBAND_CFG_SET_RX_RCV_CFG_FAIL",
		"ERR_COMMS_SBAND_DFU_STE_SET_RESET_FAIL",
		"ERR_COMMS_SBAND_DFU_GET_FEATURE_SELECT_FAIL",
		"ERR_COMMS_SBAND_DFU_GET_DEVICE_CFG_FAIL",
		"ERR_COMMS_SBAND_DFU_SET_DEVICE_CFG_FAIL",
		"ERR_COMMS_SBAND_DFU_SET_DEVICE_CFG_RX_TX_ON_FAIL",
		"ERR_COMMS_SBAND_DFU_SET_IP_ADR_CFG_FAIL",
		"ERR_COMMS_SBAND_DFU_SET_RX_RCV_CFG_FAIL",
		"ERR_COMMS_MAX"
    }


     temp = buffer(offset, 4):le_uint()
    for i = 1, error_group_comms do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_comms, temp):set_text(string.format("ERROR CODE %d : NO FAULT- %s",i - 1,err_comms_modules_def[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_comms, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i - 1,err_comms_modules_def[i]))
       end
    end
   offset = offset + 4
    

    -- Group ADCS
    local error_group_adcs = buffer(offset, 1):uint()
    subtree1:add(f_error_group_adcs, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local err_adcs_module_def =
    {
    "ERR_IO_INTERFACE_ERR",   
	  "ERR_OPERATION_FAILURE",    
	  "ERR_TC_TM_ERROR",          
	  "ERR_INVLD_PWR_STATE",     
    "ERR_ADCS_MAX"         
    }
    
    temp = buffer(offset, 4):le_uint()
    for i = 1, error_group_adcs  do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_adcs, temp):set_text(string.format("ERROR CODE %d : NOFAULT - %s",i - 1,err_adcs_module_def[i] ))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_adcs, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i - 1,err_adcs_module_def[i]))
       end
    end
   offset = offset + 4
    

    -- Group EPS
    local error_group_eps = buffer(offset, 1):uint()
    subtree1:add(f_error_group_eps, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local err_eps_def =
    {
	"ERR_EPS_COM_FAIL",
	"ERR_EPS_CRC_FAIL",
	"ERR_EPS_RESP_ERR",
	"ERR_EPS_CTRL_FW_MISMATCH",
	"ERR_EPS_MAX"
  }

    temp = buffer(offset, 4):le_uint()
    for i = 1, error_group_eps  do      
       temp1 = (temp >> i) & 0x01 
       
       if temp1 == 0 then
       subtree1:add(f_fault_status_eps, temp):set_text(string.format("ERROR CODE %d : NOFAULT- %s",i - 1,err_eps_def[i]))
       elseif temp1 == 1 then
       subtree1:add(f_fault_status_eps, temp):set_text(string.format("ERROR CODE %d : FAULT - %s",i - 1,err_eps_def[i]))
       end
    end
   offset = offset + 4
   
   end
    
    
end