add modbus-tk example script that we used for testing

firmware/rust1/rtumaster_example.py

+#!/usr/bin/env python
+# -*- coding: utf_8 -*-
+"""
+ Modbus TestKit: Implementation of Modbus protocol in python
+
+ (C)2009 - Luc Jean - luc.jean@gmail.com
+ (C)2009 - Apidev - http://www.apidev.fr
+
+ This is distributed under GNU LGPL license, see license.txt
+"""
+
+import serial
+import time
+
+import modbus_tk
+import modbus_tk.defines as cst
+from modbus_tk import modbus_rtu
+
+PORT = '/dev/ttyUSB0'
+
+def main():
+    """main"""
+    logger = modbus_tk.utils.create_logger("console")
+
+    try:
+        #Connect to the slave
+        master = modbus_rtu.RtuMaster(
+            serial.Serial(port=PORT, baudrate=19200, bytesize=8, parity='E', stopbits=1, xonxoff=0)
+        )
+        master.set_timeout(0.2)
+        master.set_verbose(True)
+        logger.info("connected")
+
+        logger.info(master.execute(1, cst.READ_HOLDING_REGISTERS, 1, 1))
+
+        logger.info(master.execute(1, cst.READ_FILE_RECORD, (0, 1, 2), (7, 5, 3), number_file=(0, 0, 0)))
+        logger.info("Bootloader state partition:")
+        logger.info(master.execute(1, cst.READ_FILE_RECORD, (int(0x6000/2),), (20,), number_file=(1,)))
+
+        x = 1
+        while True:
+            logger.info(master.execute(1, cst.WRITE_SINGLE_COIL, 0, output_value=x))
+            x = 1 - x
+            logger.info(master.execute(1, cst.READ_DISCRETE_INPUTS, 0, 5))
+            #logger.info(master.execute(1, cst.READ_INPUT_REGISTERS, 0, 13))
+            #logger.info(master.execute(1, cst.READ_INPUT_REGISTERS, 13, 12))
+            logger.info(master.execute(1, cst.READ_INPUT_REGISTERS, 0, 25))
+            time.sleep(0.1)
+
+        #send some queries
+        #logger.info(master.execute(1, cst.READ_COILS, 0, 10))
+        #logger.info(master.execute(1, cst.READ_DISCRETE_INPUTS, 0, 8))
+        #logger.info(master.execute(1, cst.READ_INPUT_REGISTERS, 100, 3))
+        #logger.info(master.execute(1, cst.READ_HOLDING_REGISTERS, 100, 12))
+        #logger.info(master.execute(1, cst.WRITE_SINGLE_COIL, 7, output_value=1))
+        #logger.info(master.execute(1, cst.WRITE_SINGLE_REGISTER, 100, output_value=54))
+        #logger.info(master.execute(1, cst.WRITE_MULTIPLE_COILS, 0, output_value=[1, 1, 0, 1, 1, 0, 1, 1]))
+        #logger.info(master.execute(1, cst.WRITE_MULTIPLE_REGISTERS, 100, output_value=xrange(12)))
+
+    except modbus_tk.modbus.ModbusError as exc:
+        logger.error("%s- Code=%d", exc, exc.get_exception_code())
+
+if __name__ == "__main__":
+    main()