add baudrate adaptation

ps_simulator.rb

@@ -9,6 +9,18 @@ DEBUG = true
 # connect to PC
 pc_serial = SerialPort.open("/dev/ttyUSB0",{ baud: 57600, databits: 8, parity: SerialPort::ODD, stop_bit: 1, flow_control: SerialPort::NONE})
 
+# the different baudrates used
+baudrates = []
+baudrates << {baud: 57600, parity: SerialPort::ODD}
+baudrates << {baud: 115200, parity: SerialPort::ODD}
+# only used when everything failed
+# but not fast enough for readpartial
+#baudrates << {baud: 9600, parity: SerialPort::NONE}
+baudrate_i = 0
+
+# temporary memeory, in case the PC writes and askes back
+tmp_memory = [0x00]*8
+file = nil
 while true
   activities = IO.select([pc_serial])
   activities[0].each do |activity|
@@ -31,8 +43,22 @@ while true
               Telegram.new(telegram_in.object,[42.0].pack("g").bytes.to_a,false)
             when 19 # device class
               Telegram.new(telegram_in.object,[0x00,0x10],false)
-            when 54,150 # power supply control, unlock code
-              Telegram.new(0xff,[0x00],false)
+            when 54,150,151 # power supply control, unlock code 1, unlock code 2
+              Telegram.new(0xff,[0x00],false) # no error
+            when 152 # write memory
+              if telegram_in.data.empty? then
+                Telegram.new(telegram_in.object,tmp_memory,false)
+              else
+                tmp_memory = telegram_in.data
+                if telegram_in.data[0]==0x33 then
+                  file.close if file and !file.closed?
+                  file = File.open(telegram_in.data[1].to_s,"w")
+                elsif telegram_in.data[0]==0x34 then
+                else
+                  file.write(telegram_in.data[1..-1].pack("C*")) if file
+                end
+                Telegram.new(0xff,[0x00],false) # no error
+              end
             else # error: object not defined
               Telegram.new(0xff,[0x07],false)
           end
@@ -41,8 +67,9 @@ while true
             pc_serial.write(telegram_out.pack) # send message
           end
         else
-          pc_serial.baud = (pc_serial.baud==57600 ? 115200 : 57600)
-          pc_serial.parity = SerialPort::ODD
+          baudrate_i = (baudrate_i+1)%baudrates.size
+          pc_serial.baud = baudrates[baudrate_i][:baud]
+          pc_serial.parity = baudrates[baudrate_i][:parity]
           puts "could not parse message: switching baudrate to #{pc_serial.baud} bps"
 		end
       rescue Exception => e