Erick / Mbed 2 deprecated ICE_BLE_TEST

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   NaturalTinyShell_ice libmDot-12Sept mbed-rtos mbed

Fork of ICE by Erick

src/ModbusMaster/ModbusMaster.cpp@45:3b9e1923cb15, 2016-09-12 (annotated)

Committer:
davidjhoward
Date:
Mon Sep 12 22:19:27 2016 +0000
Revision:
45:3b9e1923cb15
Parent:
42:c703a60993b1
Child:
49:0456ee2271be
Cloud File Handling

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jmarkel44 0:65cfa4873284 1 /******************************************************************************
davidjhoward 4:c35db3946fd8 2 *
jmarkel44 0:65cfa4873284 3 * File: ModbusMaster.cpp
jmarkel44 0:65cfa4873284 4 * Desciption: source for the ICE Modbus Master
jmarkel44 0:65cfa4873284 5 *
jmarkel44 0:65cfa4873284 6 *****************************************************************************/
jmarkel44 0:65cfa4873284 7 #include "global.h"
jmarkel44 0:65cfa4873284 8 #include <stdio.h>
davidjhoward 31:4b1587034318 9 #include "MTSLog.h"
jmarkel44 0:65cfa4873284 10 #include "BLEDataHandler.h"
davidjhoward 4:c35db3946fd8 11 #include "ModbusMaster.h"
davidjhoward 8:abe51ae5ef8b 12 #include "MbedJSONValue.h"
jmarkel44 0:65cfa4873284 13
jmarkel44 0:65cfa4873284 14 /*****************************************************************************
jmarkel44 0:65cfa4873284 15 * Function: ModbusMaster
jmarkel44 0:65cfa4873284 16 * Description: entry point for the Modbus Master
jmarkel44 0:65cfa4873284 17 *
jmarkel44 0:65cfa4873284 18 * @param (IN) args (user-defined arguments)
jmarkel44 0:65cfa4873284 19 * @return none
jmarkel44 0:65cfa4873284 20 *****************************************************************************/
davidjhoward 42:c703a60993b1 21 char ModbusMasterScratchBuf[1024];
jmarkel44 0:65cfa4873284 22 void ModbusMaster(void const *args)
jmarkel44 0:65cfa4873284 23 {
davidjhoward 31:4b1587034318 24 logInfo("%s ModbusMaster has started...", __func__);
davidjhoward 15:a6ee32969e8e 25 bool status;
davidjhoward 8:abe51ae5ef8b 26 MbedJSONValue json_value;
jmarkel44 0:65cfa4873284 27
davidjhoward 39:9287c7d59016 28 while( true ) {
davidjhoward 8:abe51ae5ef8b 29
davidjhoward 42:c703a60993b1 30 logInfo("Top Of Modbus Master Loop");
davidjhoward 42:c703a60993b1 31
davidjhoward 39:9287c7d59016 32 // configure modbus registers based in all files that start with "input"
davidjhoward 39:9287c7d59016 33 std::vector<mDot::mdot_file> file_list = GLOBAL_mdot->listUserFiles();
davidjhoward 39:9287c7d59016 34 for (std::vector<mDot::mdot_file>::iterator i = file_list.begin(); i != file_list.end(); ++i) {
davidjhoward 8:abe51ae5ef8b 35
davidjhoward 45:3b9e1923cb15 36 logInfo("(%d)FOUND INPUT FILE: %s", __LINE__, i->name);
davidjhoward 42:c703a60993b1 37
davidjhoward 42:c703a60993b1 38 if( strncmp( i->name, "input", (strlen("input")-1)) == 0 ) {
davidjhoward 8:abe51ae5ef8b 39
davidjhoward 45:3b9e1923cb15 40 logInfo("(%d)FOUND INPUT FILE: %s", __LINE__, i->name);
davidjhoward 42:c703a60993b1 41
davidjhoward 42:c703a60993b1 42 status = GLOBAL_mdot->readUserFile(i->name, (void *)ModbusMasterScratchBuf, 1024);
davidjhoward 39:9287c7d59016 43 if( status != true ) {
davidjhoward 45:3b9e1923cb15 44 logInfo("(%d)read file failed, status=%d", __LINE__, status);
davidjhoward 39:9287c7d59016 45 } else {
davidjhoward 45:3b9e1923cb15 46 logInfo("(%d)Read File SUCCESS: %s", __LINE__, ModbusMasterScratchBuf );
davidjhoward 39:9287c7d59016 47 }
davidjhoward 7:c0c03193612d 48
davidjhoward 42:c703a60993b1 49 parse( json_value, ModbusMasterScratchBuf );
davidjhoward 9:ef0ca2f8a8a6 50
davidjhoward 39:9287c7d59016 51 std::string id = json_value["id"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 52 ModbusRegisterMap[id].name = json_value["name"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 53 ModbusRegisterMap[id].units = json_value["units"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 54 ModbusRegisterMap[id].min = atof(json_value["min"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 55 ModbusRegisterMap[id].max = atof(json_value["max"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 56 ModbusRegisterMap[id].node = atoi(json_value["node"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 57 ModbusRegisterMap[id].reg = atoi(json_value["reg"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 58 ModbusRegisterMap[id].rtype = atoi(json_value["rtype"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 59 ModbusRegisterMap[id].type = atoi(json_value["type"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 60 ModbusRegisterMap[id].size = atoi(json_value["size"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 61 ModbusRegisterMap[id].order = atoi(json_value["order"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 62 ModbusRegisterMap[id].fmt = json_value["fmt"].get<std::string>().c_str();
davidjhoward 15:a6ee32969e8e 63 }
davidjhoward 4:c35db3946fd8 64 }
davidjhoward 31:4b1587034318 65
davidjhoward 39:9287c7d59016 66 // read modbus registers that have been configured.
davidjhoward 39:9287c7d59016 67 while ( true ) {
davidjhoward 39:9287c7d59016 68
davidjhoward 39:9287c7d59016 69 std::map<std::string, ModbusRegister>::iterator iter;
davidjhoward 39:9287c7d59016 70 for (iter = ModbusRegisterMap.begin(); iter != ModbusRegisterMap.end(); ++iter) {
davidjhoward 42:c703a60993b1 71 logInfo("Reading node=%d, reg=%d, size=%d, order=%d", iter->second.node, iter->second.reg, iter->second.size, iter->second.order );
davidjhoward 39:9287c7d59016 72 SendModbusCommand(iter->second.node, iter->second.reg, iter->second.size);
davidjhoward 39:9287c7d59016 73 osDelay(30);
davidjhoward 39:9287c7d59016 74
davidjhoward 39:9287c7d59016 75 switch( iter->second.type ) {
davidjhoward 39:9287c7d59016 76 case TYPE_32BIT_FLOAT:
davidjhoward 39:9287c7d59016 77 float float_value;
davidjhoward 39:9287c7d59016 78 status = ReadModbus_32bit_float( &float_value, iter->second.order );
davidjhoward 39:9287c7d59016 79 if( status == true ) {
davidjhoward 39:9287c7d59016 80 ModbusRegisterMap[iter->first].float_value = float_value;
davidjhoward 39:9287c7d59016 81 }
davidjhoward 39:9287c7d59016 82 break;
davidjhoward 39:9287c7d59016 83 case TYPE_32BIT_INT:
davidjhoward 39:9287c7d59016 84 break;
davidjhoward 39:9287c7d59016 85 case TYPE_32BIT_UINT:
davidjhoward 39:9287c7d59016 86 break;
davidjhoward 39:9287c7d59016 87 case TYPE_16BIT_INT:
davidjhoward 39:9287c7d59016 88 break;
davidjhoward 39:9287c7d59016 89 case TYPE_16BIT_UINT:
davidjhoward 39:9287c7d59016 90 break;
davidjhoward 39:9287c7d59016 91 default:
davidjhoward 39:9287c7d59016 92 break;
davidjhoward 39:9287c7d59016 93 }
davidjhoward 39:9287c7d59016 94 }
davidjhoward 39:9287c7d59016 95
davidjhoward 39:9287c7d59016 96 logInfo("Checking for MAIL");
davidjhoward 39:9287c7d59016 97 osEvent evt = ModbusMasterMailBox.get(50);
davidjhoward 39:9287c7d59016 98 if (evt.status == osEventMail) {
davidjhoward 39:9287c7d59016 99 Message_t *mail = (Message_t*)evt.value.p;
davidjhoward 39:9287c7d59016 100 logInfo("Mail Received: Action: %d, New Input File: %s", mail->action, mail->controlFile);
davidjhoward 39:9287c7d59016 101 ModbusMasterMailBox.free(mail);
davidjhoward 39:9287c7d59016 102 ModbusRegisterMap.clear();
davidjhoward 39:9287c7d59016 103 break;
davidjhoward 39:9287c7d59016 104 } else {
davidjhoward 39:9287c7d59016 105 logInfo("No Mail");
davidjhoward 39:9287c7d59016 106 }
davidjhoward 42:c703a60993b1 107 osDelay(5000);
davidjhoward 31:4b1587034318 108 }
jmarkel44 0:65cfa4873284 109 }
davidjhoward 4:c35db3946fd8 110 }
davidjhoward 4:c35db3946fd8 111
davidjhoward 4:c35db3946fd8 112
davidjhoward 4:c35db3946fd8 113 volatile char modbus_buffer_char;
davidjhoward 4:c35db3946fd8 114 volatile bool modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 115
davidjhoward 4:c35db3946fd8 116 uint8_t modbus_input_buffer[SIZE_MB_BUFFER];// 1byte address + 1 byte function +1 byte number of regs + 12 bytes of data + 2 bytes for crc response frame from slave
davidjhoward 4:c35db3946fd8 117 volatile uint8_t modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 118
davidjhoward 4:c35db3946fd8 119 //Frame crc calucation
davidjhoward 4:c35db3946fd8 120 uint16_t modbus_crc(uint8_t* buf, int len)
davidjhoward 4:c35db3946fd8 121 {
davidjhoward 4:c35db3946fd8 122 uint16_t crc = 0xFFFF;
davidjhoward 4:c35db3946fd8 123
davidjhoward 4:c35db3946fd8 124 for (int pos = 0; pos < len; pos++) {
davidjhoward 4:c35db3946fd8 125 crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc
davidjhoward 4:c35db3946fd8 126
davidjhoward 4:c35db3946fd8 127 for (int i = 8; i != 0; i--) {
davidjhoward 4:c35db3946fd8 128 // Loop over each bit
davidjhoward 4:c35db3946fd8 129 if ((crc & 0x0001) != 0) {
davidjhoward 4:c35db3946fd8 130 // If the LSB is set
davidjhoward 4:c35db3946fd8 131 crc >>= 1; // Shift right and XOR 0xA001
davidjhoward 4:c35db3946fd8 132 crc ^= 0xA001;
davidjhoward 4:c35db3946fd8 133 } else // Else LSB is not set
davidjhoward 4:c35db3946fd8 134 crc >>= 1; // Just shift right
davidjhoward 4:c35db3946fd8 135 }
davidjhoward 4:c35db3946fd8 136 }
davidjhoward 4:c35db3946fd8 137 // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes)
davidjhoward 4:c35db3946fd8 138 return crc;
davidjhoward 4:c35db3946fd8 139 }
davidjhoward 4:c35db3946fd8 140
davidjhoward 4:c35db3946fd8 141 RawSerial modbus(PA_2, PA_3);
davidjhoward 4:c35db3946fd8 142 DigitalOut modbus_enable0(PB_0);
davidjhoward 4:c35db3946fd8 143 DigitalOut modbus_enable1(PB_1);
davidjhoward 4:c35db3946fd8 144
davidjhoward 4:c35db3946fd8 145 void modbus_init( uint16_t baudRate )
davidjhoward 4:c35db3946fd8 146 {
davidjhoward 4:c35db3946fd8 147 modbus.baud(baudRate);
davidjhoward 4:c35db3946fd8 148 modbus.attach(&modbus_recv, RawSerial::RxIrq);
davidjhoward 4:c35db3946fd8 149 }
davidjhoward 4:c35db3946fd8 150
davidjhoward 4:c35db3946fd8 151 //call back when character goes into RX buffer for RS485 modbus
davidjhoward 4:c35db3946fd8 152 void modbus_recv()
davidjhoward 4:c35db3946fd8 153 {
davidjhoward 4:c35db3946fd8 154
davidjhoward 4:c35db3946fd8 155 if (modbus.readable()) {
davidjhoward 4:c35db3946fd8 156 modbus_buffer_char = modbus.getc();
davidjhoward 4:c35db3946fd8 157 if (modbus_input_buffer_counter == 0 && modbus_buffer_char == 0x00) {
davidjhoward 4:c35db3946fd8 158 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 159 } else {
davidjhoward 4:c35db3946fd8 160 modbus_input_buffer[modbus_input_buffer_counter] = modbus_buffer_char;
davidjhoward 4:c35db3946fd8 161 modbus_input_buffer_counter++;
davidjhoward 4:c35db3946fd8 162 }
davidjhoward 4:c35db3946fd8 163 }
davidjhoward 4:c35db3946fd8 164
davidjhoward 4:c35db3946fd8 165 if (modbus_input_buffer_counter > modbus_input_buffer[2] + 4) {
davidjhoward 4:c35db3946fd8 166 modbus_interrupt_complete = true;
davidjhoward 4:c35db3946fd8 167 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 168 }
davidjhoward 4:c35db3946fd8 169 }
davidjhoward 4:c35db3946fd8 170
davidjhoward 4:c35db3946fd8 171 // Read modbus master frame
davidjhoward 9:ef0ca2f8a8a6 172 void SendModbusCommand(uint8_t slave_address, uint16_t firstReg, uint16_t noRegs)
davidjhoward 4:c35db3946fd8 173 {
davidjhoward 4:c35db3946fd8 174 uint8_t L1V[8] = {slave_address, 0x04, 0x00, 0x02, 0x00, 0x02, 0xD1, 0x16};
davidjhoward 4:c35db3946fd8 175
davidjhoward 4:c35db3946fd8 176 L1V[2] = (firstReg >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 177 L1V[3] = firstReg & 0xFF;
davidjhoward 4:c35db3946fd8 178 L1V[4] = (noRegs >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 179 L1V[5] = noRegs & 0xFF;
davidjhoward 4:c35db3946fd8 180 L1V[6] = modbus_crc(L1V,6) & 0xFF;
davidjhoward 4:c35db3946fd8 181 L1V[7] = (modbus_crc(L1V,6)>>8) & 0xFF;
davidjhoward 4:c35db3946fd8 182
davidjhoward 4:c35db3946fd8 183 modbus_enable0 = 1;
davidjhoward 4:c35db3946fd8 184 modbus_enable1 = 1;
davidjhoward 4:c35db3946fd8 185
davidjhoward 4:c35db3946fd8 186 for (uint8_t i = 0; i < 8; i++)
davidjhoward 4:c35db3946fd8 187 modbus.putc(L1V[i]);
davidjhoward 4:c35db3946fd8 188
davidjhoward 4:c35db3946fd8 189 wait_ms(2);
davidjhoward 4:c35db3946fd8 190 modbus_enable0 = 0;
davidjhoward 4:c35db3946fd8 191 modbus_enable1 = 0;
davidjhoward 4:c35db3946fd8 192
davidjhoward 4:c35db3946fd8 193 }
davidjhoward 4:c35db3946fd8 194
davidjhoward 4:c35db3946fd8 195 bool mbInterruptComplete()
davidjhoward 4:c35db3946fd8 196 {
davidjhoward 4:c35db3946fd8 197 if (modbus_interrupt_complete) {
davidjhoward 4:c35db3946fd8 198 modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 199 return true;
davidjhoward 4:c35db3946fd8 200 } else {
davidjhoward 4:c35db3946fd8 201 return false;
davidjhoward 4:c35db3946fd8 202 }
davidjhoward 4:c35db3946fd8 203 }
davidjhoward 4:c35db3946fd8 204
davidjhoward 15:a6ee32969e8e 205 bool ReadModbus_32bit_float( float *float_value, int order )
davidjhoward 4:c35db3946fd8 206 {
davidjhoward 15:a6ee32969e8e 207 MR_REGISTER_32_BIT_FLOAT value;
davidjhoward 31:4b1587034318 208
davidjhoward 4:c35db3946fd8 209 if (mbInterruptComplete() != true ) {
davidjhoward 4:c35db3946fd8 210 return false;
davidjhoward 4:c35db3946fd8 211 }
davidjhoward 4:c35db3946fd8 212
davidjhoward 15:a6ee32969e8e 213 switch( order ) {
davidjhoward 31:4b1587034318 214 case BigEndian:
davidjhoward 15:a6ee32969e8e 215 value.b.lo_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 216 value.b.lo_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 217 value.b.hi_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 218 value.b.hi_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 219 break;
davidjhoward 15:a6ee32969e8e 220 case BigEndianReverseWord:
davidjhoward 15:a6ee32969e8e 221 value.b.lo_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 222 value.b.lo_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 223 value.b.hi_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 224 value.b.hi_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 225 break;
davidjhoward 15:a6ee32969e8e 226 default:
davidjhoward 15:a6ee32969e8e 227 return false;
davidjhoward 15:a6ee32969e8e 228 }
davidjhoward 15:a6ee32969e8e 229 *float_value = value.f;
davidjhoward 4:c35db3946fd8 230 return true;
davidjhoward 4:c35db3946fd8 231 }