exo_sw_dissectors/Dissector/eps_dissector.lua

function eps_dissector(buffer, pinfo, tree, TC_TM_PROTOCOL, offset, instance)
  
  local f_timestamp = ProtoField.uint8("TC_TM_PROTOCOL.timestamp_eps", "Timestamp", base.DEC)
  local f_pv_cnt = ProtoField.uint8("TC_TM_PROTOCOL.pv_cnt", "PV Count", base.DEC)
  local f_mppt_cnt = ProtoField.uint8("TC_TM_PROTOCOL.mppt_cnt", "MPPT Count", base.DEC)
  local f_op_conv_cnt = ProtoField.uint8("TC_TM_PROTOCOL.op_conv_cnt", "OP Converter Count", base.DEC)
  local f_btry_cnt = ProtoField.uint8("TC_TM_PROTOCOL.btry_cnt", "Battery Count", base.DEC)
  local f_btry_temp_sns_cnt = ProtoField.uint8("TC_TM_PROTOCOL.btry_temp_sns_cnt", "Battery Temp Sensor Count", base.DEC)
  local f_chnl_cnt = ProtoField.uint8("TC_TM_PROTOCOL.chnl_cnt", "Channel Count", base.DEC)
  local f_volt_rail_cnt = ProtoField.uint8("TC_TM_PROTOCOL.volt_rail_cnt", "Voltage Rail Count", base.DEC)
  local f_pv_volt_rd = ProtoField.float("TC_TM_PROTOCOL.pv_volt_rd", "PV Voltage Readings", base.DEC)
  local f_pv_cur_rd = ProtoField.float("TC_TM_PROTOCOL.pv_cur_rd", "PV Current Readings", base.DEC)
  local f_mppt_volt_rd = ProtoField.float("TC_TM_PROTOCOL.mppt_volt_rd", "MPPT Voltage Readings", base.DEC)
  local f_mppt_cur_rd = ProtoField.float("TC_TM_PROTOCOL.mppt_cur_rd", "MPPT Current Readings", base.DEC)
  local f_op_conv_volt_rd = ProtoField.bytes("TC_TM_PROTOCOL.op_conv_volt_rd", "OP Converter Voltage Readings")
  local f_tot_btry_volt_rd = ProtoField.float("TC_TM_PROTOCOL.tot_btry_volt_rd", "Total Battery Voltage Read", base.DEC)
  local f_tot_btry_cur_rd = ProtoField.float("TC_TM_PROTOCOL.tot_btry_cur_rd", "Total Battery Current Read", base.DEC)
  local f_btry_temp_sns_rd = ProtoField.uint8("TC_TM_PROTOCOL.btry_temp_sns_rd", "Battery Temp Sensor Readings", base.DEC)
  local f_chnl_state = ProtoField.uint16("TC_TM_PROTOCOL.chnl_state", "Channel States", base.DEC)
  local f_volt_rail_cur_value = ProtoField.bytes("TC_TM_PROTOCOL.volt_rail_cur_value", "Voltage Rail Current Values")
  local f_chnl_ovr_cur_flg = ProtoField.bytes("TC_TM_PROTOCOL.chnl_ovr_cur_flg", "Channel Overcurrent Flags")
  local f_hrm_btry_mode_info = ProtoField.uint8("TC_TM_PROTOCOL.hrm_btry_mode_info", "HRM Battery Mode Info", base.DEC)
  local f_eps_chnl_hw_sts = ProtoField.bytes("TC_TM_PROTOCOL.eps_chnl_hw_sts", "EPS CNTRL Channel HW status")
  local f_reserved_byte_size = ProtoField.uint8("TC_TM_PROTOCOL.f_reserved_byte_size", "Reserved Byte Size", base.DEC)
  local f_reserved_byte_array = ProtoField.uint8("TC_TM_PROTOCOL.f_reserved_byte_size", "Reserved Byte Array", base.DEC)


TC_TM_PROTOCOL.fields = {
    f_timestamp, f_pv_cnt, f_mppt_cnt, f_op_conv_cnt, f_btry_cnt, f_btry_temp_sns_cnt,
    f_chnl_cnt, f_volt_rail_cnt, f_pv_volt_rd, f_pv_cur_rd, f_mppt_volt_rd,
    f_mppt_cur_rd, f_op_conv_volt_rd, f_tot_btry_volt_rd, f_tot_btry_cur_rd,
    f_btry_temp_sns_rd, f_chnl_state, f_volt_rail_cur_value,
    f_chnl_ovr_cur_flg, f_hrm_btry_mode_info, f_eps_chnl_hw_sts
}

local subtree = tree:add(TC_TM_PROTOCOL, buffer(), "EPS GET LIVE PARAM")
  for i = 0, instance - 1 do
    local subtree1 = subtree:add(TC_TM_PROTOCOL, buffer(), "Instance "..i)
    
    subtree1:add(f_timestamp, buffer(offset, 4):le_uint())
    offset = offset + 8
    local pv_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_pv_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local mppt_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_mppt_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local op_conv_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_op_conv_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local btry_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_btry_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local btry_temp_sns_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_btry_temp_sns_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local chnl_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_chnl_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local volt_rail_cnt = buffer(offset, 1):le_uint()
    subtree1:add(f_volt_rail_cnt, buffer(offset, 1):le_uint())
    offset = offset + 1
    
    local count = 0  -- Initialize the sum to 0
    local value 
    
    for i = 0, pv_cnt - 1 do
    value = buffer(offset, 2):le_uint()  -- Parse as little-endian uint16
    value = value/10;
    subtree1:add(f_pv_volt_rd, value):set_text(string.format("PV Volt %d ----> %0.1f V", i, value))
    offset = offset + 2  -- Move the offset forward by 2 bytes
    end
    
    for i = 0, pv_cnt - 1 do
    value = buffer(offset, 2):le_uint()
    value = value / 100
    subtree1:add(f_pv_cur_rd, value):set_text(string.format("PV Current %d ----> %0.2f A", i, value))
    offset = offset + 2
    end
    
    for i = 0, mppt_cnt - 1 do
    value = buffer(offset, 2):le_uint()
    value = value / 10
    subtree1:add(f_mppt_volt_rd, value):set_text(string.format("MPPT Volt %d ----> %0.1f V", i, value))
    offset = offset + 2
    end
    
    for i = 0, mppt_cnt - 1 do
    value = buffer(offset, 2):le_uint()
    value = value / 100
    subtree1:add(f_mppt_cur_rd, value):set_text(string.format("MPPT Current %d ----> %0.2f A", i, value))
    offset = offset + 2
    end
    
    for i = 0, op_conv_cnt - 1 do
    value = buffer(offset, 2):le_uint()
    value = value / 10
    subtree1:add(f_op_conv_volt_rd, value):set_text(string.format("OP Convertor Volt %d ----> %0.1f V", i, value))
    offset = offset + 2
    end
    
    local tot_btry_volt = buffer(offset, 2):le_uint()
    tot_btry_volt = tot_btry_volt / 10
    subtree1:add(f_tot_btry_volt_rd, tot_btry_volt):set_text(string.format("Total Battery Voltage Read ---- %0.1f V", tot_btry_volt))
    offset = offset + 2
    
    local tot_btry_curr = buffer(offset, 2):le_uint()
    tot_btry_curr = tot_btry_curr / 100
    subtree1:add(f_tot_btry_cur_rd, tot_btry_curr):set_text(string.format("Total Battery Curr Read ---- %0.2f A", tot_btry_curr))
    offset = offset + 2
    
    for i = 0, btry_temp_sns_cnt - 1 do
    value = buffer(offset, 1):le_uint()
    subtree1:add(f_btry_temp_sns_rd, value):set_text(string.format("Battery Temp Sensor %d ----> %d degC", i, value))
    offset = offset + 1
    end
    
    count = math.ceil(chnl_cnt / 8)
    local chnl_state = buffer(offset, count):le_uint()
    for i = 0, chnl_cnt - 1 do
    data = (chnl_state >> i) & 1
    if data == 1 then
    subtree1:add(f_chnl_state, data):set_text(string.format("Channel %d ----> ON", i)) -- Adjust size as needed
    else 
    subtree1:add(f_chnl_state, data):set_text(string.format("Channel %d ----> OFF", i))
    end
    end
    offset = offset + count
    
    
    for i = 0, volt_rail_cnt - 1 do
    value = buffer(offset, 2):le_uint()
    value = value / 100
    subtree1:add(f_volt_rail_cur_value, value):set_text(string.format("Volt Rail current Values %d ----> %0.2f A", i, value))
    offset = offset + 2
    end
    
    count = math.ceil(volt_rail_cnt / 8)
    local over_flow = buffer(offset, count):le_uint()
    for i = 0, volt_rail_cnt - 1 do
    data = (over_flow >> i) & 1
    if data == 1 then
    subtree1:add(f_chnl_ovr_cur_flg, data):set_text(string.format("Over Current Flag %d ----> SET", i)) -- Adjust size as needed
    else 
    subtree1:add(f_chnl_ovr_cur_flg, data):set_text(string.format("Over Current Flag %d ----> CLR", i))
    end
    end
    offset = offset + count
    
    local btry_mode = buffer(offset, 1):le_uint()
    local data = btry_mode & 0x0f
    
    if data == 0 then
    subtree1:add(f_hrm_btry_mode_info,data):set_text(string.format("EPS MODE ----> OFF"))
    elseif data == 1 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("EPS MODE ----> CRITICAL"))
    elseif data == 2 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("EPS MODE ----> SAFE"))
    elseif data == 3 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("EPS MODE ----> NORMAL"))
    elseif data == 4 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("EPS MODE ----> FULL"))
    end
    
    data = (btry_mode >> 4) & 1
    
    if data == 1 then
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("Bttery Charge Status ----> Charging"))
    else
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("Bttery Charge Status ----> Not Charging"))
    end
    
    data = (btry_mode >> 5) & 3
    
    if data == 3 then
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("HRM Release Status ----> Both Left and Right opened"))
    elseif data == 2 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("HRM Release Status ----> Left opened and Right Not opened"))
    elseif data == 1 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("HRM Release Status ----> Right opened and Left Not opened"))
    elseif data == 0 then 
    subtree1:add(f_hrm_btry_mode_info, data):set_text(string.format("HRM Release Status ----> Both Left and Right Not opened"))
    end
    
    offset = offset + 1
    offset = offset + 24
    local temp
    --local data = buffer(offset, 2):le_uint()
    subtree1:add("EPS Cntrl channel HW status ------>")
    for i = 0,13 - 1 do
      data = buffer(offset, 1):le_uint()
      if data == 0 then
        subtree1:add(f_eps_chnl_hw_sts, data):set_text(string.format("Channel %d ----> %d",i, data))
      elseif data == 1 then
        subtree1:add(f_eps_chnl_hw_sts, data):set_text(string.format("Channel %d ----> %d",i, data))
      end
      offset = offset + 1
    end
    
    --subtree:add(f_reserved_byte_size, buffer(offset, 1):le_uint())
    --offset = offset + 1
    
    --subtree:add(reserved_byte_array, buffer(offset, 1):le_uint())
    --offset = offset + 1
  end
end