Diff: setup.h

Revision:

0:d603d31b42dc

Child:

2:ca3d2395b6d3

diff -r 000000000000 -r d603d31b42dc setup.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/setup.h	Thu Jun 07 14:28:24 2018 +0000
@@ -0,0 +1,136 @@
+#ifndef SETUP_H
+#define SETUP_H
+
+/*
+ SimpleModbusSlave allows you to communicate
+ to any slave using the Modbus RTU protocol.
+ 
+ The crc calculation is based on the work published 
+ by jpmzometa at 
+ http://sites.google.com/site/jpmzometa/arduino-mbrt
+ 
+ By Juan Bester : bester.juan@gmail.com
+ 
+ The functions implemented are functions 3 and 16.
+ read holding registers and preset multiple registers
+ of the Modbus RTU Protocol, to be used over the Arduino serial connection.
+ 
+ This implementation DOES NOT fully comply with the Modbus specifications.
+ 
+ Specifically the frame time out have not been implemented according
+ to Modbus standards. The code does however combine the check for
+ inter character time out and frame time out by incorporating a maximum
+ time out allowable when reading from the message stream.
+ 
+ These library of functions are designed to enable a program send and
+ receive data from a device that communicates using the Modbus protocol.
+ 
+ SimpleModbusSlave implements an unsigned int return value on a call to modbus_update().
+ This value is the total error count since the slave started. It's useful for fault finding.
+ 
+ This code is for a Modbus slave implementing functions 3 and 16
+ function 3: Reads the binary contents of holding registers (4X references)
+ function 16: Presets values into a sequence of holding registers (4X references)
+ 
+ All the functions share the same register array.
+ 
+ Exception responses:
+ 1 ILLEGAL FUNCTION
+ 2 ILLEGAL DATA ADDRESS
+ 3 ILLEGAL DATA VALUE
+ 
+ Note:  
+ The Arduino serial ring buffer is 128 bytes or 64 registers.
+ Most of the time you will connect the arduino to a master via serial
+ using a MAX485 or similar.
+ 
+ In a function 3 request the master will attempt to read from your
+ slave and since 5 bytes is already used for ID, FUNCTION, NO OF BYTES
+ and two BYTES CRC the master can only request 122 bytes or 61 registers.
+ 
+ In a function 16 request the master will attempt to write to your 
+ slave and since a 9 bytes is already used for ID, FUNCTION, ADDRESS, 
+ NO OF REGISTERS, NO OF BYTES and two BYTES CRC the master can only write
+ 118 bytes or 59 registers.
+ 
+ Using the FTDI converter ic the maximum bytes you can send is limited 
+ to its internal buffer which is 60 bytes or 30 unsigned int registers. 
+ 
+ Thus:
+ 
+ In a function 3 request the master will attempt to read from your
+ slave and since 5 bytes is already used for ID, FUNCTION, NO OF BYTES
+ and two BYTES CRC the master can only request 54 bytes or 27 registers.
+ 
+ In a function 16 request the master will attempt to write to your 
+ slave and since a 9 bytes is already used for ID, FUNCTION, ADDRESS, 
+ NO OF REGISTERS, NO OF BYTES and two BYTES CRC the master can only write
+ 50 bytes or 25 registers.
+  
+ Since it is assumed that you will mostly use the Arduino to connect to a 
+ master without using a USB to Serial converter the internal buffer is set
+ the same as the Arduino Serial ring buffer which is 128 bytes.
+ 
+ The functions included here have been derived from the 
+ Modbus Specifications and Implementation Guides
+ 
+ http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
+ http://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf
+ http://www.modbus.org/docs/PI_MBUS_300.pdf
+*/
+
+// function definitions
+
+
+const uint16_t crc_tab_8005_reflected[] =
+{
+0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
+0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
+0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
+0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
+0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
+0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
+0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
+0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
+0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
+0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
+0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
+0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
+0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
+0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
+0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
+0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
+ 
+0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
+0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
+0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
+0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
+0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
+0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
+0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
+0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
+0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
+0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
+0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
+0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
+0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
+0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
+0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
+0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
+};
+
+void modbus_configure(long baud, int _slaveID );
+int modbus_read(void); 
+int modbus_read2(void);
+//unsigned short calculate_crc16_Modbus( uint8_t *checkArray , int dataLengt );
+//unsigned long update_crc16_reflected(const long *table, unsigned long crc, unsigned int c );
+//unsigned long update_crc16_A001( unsigned long crc, unsigned int c );
+int modbus_sendData(void);
+
+uint16_t update_crc16_reflected(const uint16_t *table, uint16_t crc, unsigned int c );
+uint16_t update_crc16_A001( long crc, unsigned int c );
+long calculate_crc16_Modbus(unsigned int *p, unsigned int length);
+
+
+
+#endif