Erick / Mbed 2 deprecated ICE_BLE_TEST

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Dependencies:   NaturalTinyShell_ice libmDot-12Sept mbed-rtos mbed

Fork of ICE by Erick

src/ModbusMaster/ModbusMaster.cpp@178:335b2e1ff30c, 2016-10-04 (annotated)

Committer:
jmarkel44
Date:
Tue Oct 04 15:48:12 2016 +0000
Revision:
178:335b2e1ff30c
Parent:
176:492cfa856521
Parent:
177:9ec90c8e3ce1
Child:
180:b548e289b648
merged

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
davidjhoward 81:d45bfa16953a 14 DigitalOut dout1(PC_1);
davidjhoward 81:d45bfa16953a 15 DigitalOut dout2(PA_1);
davidjhoward 148:ee3cbaafe355 16 DigitalIn flow_switch(PA_0);
davidjhoward 148:ee3cbaafe355 17 DigitalIn dinp2(PC_13);
davidjhoward 81:d45bfa16953a 18
jmarkel44 0:65cfa4873284 19 /*****************************************************************************
jmarkel44 0:65cfa4873284 20 * Function: ModbusMaster
jmarkel44 0:65cfa4873284 21 * Description: entry point for the Modbus Master
jmarkel44 0:65cfa4873284 22 *
jmarkel44 0:65cfa4873284 23 * @param (IN) args (user-defined arguments)
jmarkel44 0:65cfa4873284 24 * @return none
jmarkel44 0:65cfa4873284 25 *****************************************************************************/
davidjhoward 149:950c90425f7c 26 std::map<std::string,VirtualCommand> VirtualCommandMap;
davidjhoward 149:950c90425f7c 27
jmarkel44 177:9ec90c8e3ce1 28 char ModbusMasterScratchBuf[MAX_FILE_SIZE];
jmarkel44 0:65cfa4873284 29 void ModbusMaster(void const *args)
jmarkel44 0:65cfa4873284 30 {
davidjhoward 31:4b1587034318 31 logInfo("%s ModbusMaster has started...", __func__);
davidjhoward 15:a6ee32969e8e 32 bool status;
davidjhoward 149:950c90425f7c 33 RegisterType_t regType;
davidjhoward 82:f3e495a98877 34 bool move_up = true;
davidjhoward 81:d45bfa16953a 35
davidjhoward 54:ec1b03064bbd 36 modbus_init(MB_BAUD_RATE);
davidjhoward 54:ec1b03064bbd 37 DigitalOut flu_power(PA_11);
davidjhoward 54:ec1b03064bbd 38 flu_power = 0; // provide power to the modbus
jmarkel44 0:65cfa4873284 39
davidjhoward 39:9287c7d59016 40 while( true ) {
davidjhoward 8:abe51ae5ef8b 41
davidjhoward 173:acfb464a4aec 42 MbedJSONValue json_value;
davidjhoward 173:acfb464a4aec 43
davidjhoward 39:9287c7d59016 44 // configure modbus registers based in all files that start with "input"
davidjhoward 39:9287c7d59016 45 std::vector<mDot::mdot_file> file_list = GLOBAL_mdot->listUserFiles();
davidjhoward 39:9287c7d59016 46 for (std::vector<mDot::mdot_file>::iterator i = file_list.begin(); i != file_list.end(); ++i) {
davidjhoward 149:950c90425f7c 47 if( (strncmp( i->name, "vcmd", (strlen("input")-1)) == 0) ) {
jmarkel44 177:9ec90c8e3ce1 48 status = GLOBAL_mdot->readUserFile(i->name, ModbusMasterScratchBuf, MAX_FILE_SIZE);
davidjhoward 149:950c90425f7c 49 if( status != true ) {
davidjhoward 149:950c90425f7c 50 logInfo("(%d)read file failed, status=%d", __LINE__, status);
davidjhoward 149:950c90425f7c 51 } else {
davidjhoward 151:9d47fe5ba805 52 logInfo("(%s:%d)loading File: %s", __func__, __LINE__, i->name );
davidjhoward 149:950c90425f7c 53 }
davidjhoward 8:abe51ae5ef8b 54
davidjhoward 149:950c90425f7c 55 parse( json_value, ModbusMasterScratchBuf );
davidjhoward 162:5e8948b8044d 56
davidjhoward 149:950c90425f7c 57 std::string id = json_value["id"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 58 VirtualCommandMap[id].constant = atof(json_value["constant"].get<std::string>().c_str());
davidjhoward 149:950c90425f7c 59 VirtualCommandMap[id].opl = json_value["opl"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 60 VirtualCommandMap[id].opr = json_value["opr"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 61 VirtualCommandMap[id].op = json_value["op"].get<std::string>().c_str();
davidjhoward 151:9d47fe5ba805 62 logInfo("Processd virtual command file: id=%s", id.c_str());
davidjhoward 149:950c90425f7c 63 continue;
davidjhoward 149:950c90425f7c 64 }
davidjhoward 149:950c90425f7c 65
davidjhoward 149:950c90425f7c 66 regType = REG_TYPE_NONE;
davidjhoward 149:950c90425f7c 67
davidjhoward 149:950c90425f7c 68 if( (strncmp( i->name, "input", (strlen("input")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 69 regType = REG_TYPE_INPUT;
davidjhoward 149:950c90425f7c 70 } else if( (strncmp( i->name, "output", (strlen("output")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 71 regType = REG_TYPE_OUTPUT;
davidjhoward 149:950c90425f7c 72 } else if( (strncmp( i->name, "vinput", (strlen("vinput")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 73 regType = REG_TYPE_VINPUT;
davidjhoward 149:950c90425f7c 74 } else if( (strncmp( i->name, "voutput", (strlen("voutput")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 75 regType = REG_TYPE_VOUTPUT;
davidjhoward 149:950c90425f7c 76 }
davidjhoward 149:950c90425f7c 77
davidjhoward 149:950c90425f7c 78 if( regType != REG_TYPE_NONE ) {
davidjhoward 81:d45bfa16953a 79
jmarkel44 177:9ec90c8e3ce1 80 status = GLOBAL_mdot->readUserFile(i->name, ModbusMasterScratchBuf, MAX_FILE_SIZE);
davidjhoward 39:9287c7d59016 81 if( status != true ) {
davidjhoward 45:3b9e1923cb15 82 logInfo("(%d)read file failed, status=%d", __LINE__, status);
davidjhoward 39:9287c7d59016 83 } else {
davidjhoward 151:9d47fe5ba805 84 logInfo("(%s:%d)loading File: %s", __func__, __LINE__, i->name );
davidjhoward 39:9287c7d59016 85 }
davidjhoward 81:d45bfa16953a 86
davidjhoward 42:c703a60993b1 87 parse( json_value, ModbusMasterScratchBuf );
davidjhoward 9:ef0ca2f8a8a6 88
davidjhoward 39:9287c7d59016 89 std::string id = json_value["id"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 90 ModbusRegisterMap[id].name = json_value["name"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 91 ModbusRegisterMap[id].units = json_value["units"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 92 ModbusRegisterMap[id].min = atof(json_value["min"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 93 ModbusRegisterMap[id].max = atof(json_value["max"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 94 ModbusRegisterMap[id].node = atoi(json_value["node"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 95 ModbusRegisterMap[id].reg = atoi(json_value["reg"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 96 ModbusRegisterMap[id].rtype = atoi(json_value["rtype"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 97 ModbusRegisterMap[id].type = atoi(json_value["type"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 98 ModbusRegisterMap[id].size = atoi(json_value["size"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 99 ModbusRegisterMap[id].order = atoi(json_value["order"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 100 ModbusRegisterMap[id].fmt = json_value["fmt"].get<std::string>().c_str();
davidjhoward 49:0456ee2271be 101 ModbusRegisterMap[id].rfreq = atoi(json_value["rfreq"].get<std::string>().c_str());
davidjhoward 149:950c90425f7c 102 ModbusRegisterMap[id].regType = regType;
davidjhoward 82:f3e495a98877 103 ModbusRegisterMap[id].simulated = false;
davidjhoward 148:ee3cbaafe355 104 ModbusRegisterMap[id].valid = true;
davidjhoward 149:950c90425f7c 105 if( (regType == REG_TYPE_VINPUT) || (regType == REG_TYPE_VOUTPUT) ) {
davidjhoward 149:950c90425f7c 106 ModbusRegisterMap[id].vcmd = json_value["vcmd"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 107 }
davidjhoward 15:a6ee32969e8e 108 }
davidjhoward 4:c35db3946fd8 109 }
davidjhoward 162:5e8948b8044d 110
davidjhoward 151:9d47fe5ba805 111 osSignalSet(mainThreadId, sig_output_continue);
davidjhoward 31:4b1587034318 112
davidjhoward 39:9287c7d59016 113 // read modbus registers that have been configured.
davidjhoward 39:9287c7d59016 114 while ( true ) {
davidjhoward 39:9287c7d59016 115
davidjhoward 39:9287c7d59016 116 std::map<std::string, ModbusRegister>::iterator iter;
davidjhoward 39:9287c7d59016 117 for (iter = ModbusRegisterMap.begin(); iter != ModbusRegisterMap.end(); ++iter) {
davidjhoward 82:f3e495a98877 118 if( iter->second.simulated == true ) {
davidjhoward 176:492cfa856521 119 // logInfo("simulating input=%s, min=%2.2f, max=%2.2f, start_value=%2.2f, up_step=%2.2f, down_step=%2.2f",iter->first.c_str(), SimulateInputMap[iter->first].min, SimulateInputMap[iter->first].max, SimulateInputMap[iter->first].start_value, SimulateInputMap[iter->first].up_step, SimulateInputMap[iter->first].down_step);
davidjhoward 176:492cfa856521 120 if( (SimulateInputMap[iter->first].min == 0) && (SimulateInputMap[iter->first].max == 0) ) {
davidjhoward 176:492cfa856521 121 ModbusRegisterMap[iter->first].float_value = SimulateInputMap[iter->first].start_value;
davidjhoward 176:492cfa856521 122 } else {
davidjhoward 176:492cfa856521 123 if( ModbusRegisterMap[iter->first].float_value >= SimulateInputMap[iter->first].max ) {
davidjhoward 176:492cfa856521 124 move_up = false;
davidjhoward 176:492cfa856521 125 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value - SimulateInputMap[iter->first].down_step;
davidjhoward 176:492cfa856521 126 } else if( ModbusRegisterMap[iter->first].float_value <= SimulateInputMap[iter->first].min ) {
davidjhoward 176:492cfa856521 127 move_up = true;
davidjhoward 176:492cfa856521 128 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value + SimulateInputMap[iter->first].up_step;
davidjhoward 82:f3e495a98877 129 } else {
davidjhoward 176:492cfa856521 130 if( move_up == true ) {
davidjhoward 150:4db35c8234b4 131 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value + SimulateInputMap[iter->first].up_step;
davidjhoward 82:f3e495a98877 132 } else {
davidjhoward 176:492cfa856521 133 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value - SimulateInputMap[iter->first].down_step;
davidjhoward 82:f3e495a98877 134 }
davidjhoward 82:f3e495a98877 135 }
davidjhoward 176:492cfa856521 136 printf("simulating input=%s, value=%2.2f\r\n",iter->first.c_str(), ModbusRegisterMap[iter->first].float_value);
davidjhoward 82:f3e495a98877 137 }
davidjhoward 82:f3e495a98877 138 continue;
davidjhoward 82:f3e495a98877 139 }
davidjhoward 148:ee3cbaafe355 140
davidjhoward 147:105bcf234f81 141 if( iter->second.node != 0 ) {
davidjhoward 148:ee3cbaafe355 142
davidjhoward 149:950c90425f7c 143 logInfo("Processing Input: tag=%s, node=%d, reg=%d, size=%d, order=%d", iter->first.c_str(), iter->second.node, iter->second.reg, iter->second.size, iter->second.order );
davidjhoward 147:105bcf234f81 144 SendModbusCommand(iter->second.node, iter->second.reg, iter->second.size);
davidjhoward 147:105bcf234f81 145 Thread::wait(30);
davidjhoward 147:105bcf234f81 146 switch( iter->second.type ) {
davidjhoward 147:105bcf234f81 147 case TYPE_32BIT_FLOAT:
davidjhoward 147:105bcf234f81 148 float float_value;
davidjhoward 147:105bcf234f81 149 status = ReadModbus_32bit_float( &float_value, iter->second.order );
davidjhoward 147:105bcf234f81 150 if( status == true ) {
davidjhoward 147:105bcf234f81 151 ModbusRegisterMap[iter->first].float_value = float_value;
davidjhoward 148:ee3cbaafe355 152 ModbusRegisterMap[iter->first].valid = true;
davidjhoward 148:ee3cbaafe355 153 // logInfo("Modbus Tag:%s value=%2.2f", iter->first.c_str(), float_value );
davidjhoward 147:105bcf234f81 154 } else {
davidjhoward 148:ee3cbaafe355 155 ModbusRegisterMap[iter->first].valid = false;
davidjhoward 148:ee3cbaafe355 156 // logInfo("Modbus Read Failed, tag=%s", iter->first.c_str() );
davidjhoward 147:105bcf234f81 157 }
davidjhoward 147:105bcf234f81 158 break;
davidjhoward 147:105bcf234f81 159 case TYPE_32BIT_INT:
davidjhoward 147:105bcf234f81 160 break;
davidjhoward 147:105bcf234f81 161 case TYPE_32BIT_UINT:
davidjhoward 147:105bcf234f81 162 break;
davidjhoward 147:105bcf234f81 163 case TYPE_16BIT_INT:
davidjhoward 147:105bcf234f81 164 break;
davidjhoward 147:105bcf234f81 165 case TYPE_16BIT_UINT:
davidjhoward 147:105bcf234f81 166 break;
davidjhoward 147:105bcf234f81 167 default:
davidjhoward 147:105bcf234f81 168 break;
davidjhoward 147:105bcf234f81 169 }
davidjhoward 39:9287c7d59016 170 }
davidjhoward 82:f3e495a98877 171
davidjhoward 149:950c90425f7c 172 if( (iter->second.node == 0) && (iter->second.regType == REG_TYPE_OUTPUT) ) {
davidjhoward 148:ee3cbaafe355 173 // logInfo("processing PIN output=%s, reg=%d, value=%d",iter->first.c_str(), ModbusRegisterMap[iter->first].reg, (bool)ModbusRegisterMap[iter->first].float_value);
davidjhoward 148:ee3cbaafe355 174 if( ModbusRegisterMap[iter->first].reg == 1 ) {
davidjhoward 148:ee3cbaafe355 175 dout1 = (bool)ModbusRegisterMap[iter->first].float_value;
davidjhoward 148:ee3cbaafe355 176 } else {
davidjhoward 148:ee3cbaafe355 177 dout2 = (bool)ModbusRegisterMap[iter->first].float_value;
davidjhoward 148:ee3cbaafe355 178 }
davidjhoward 148:ee3cbaafe355 179 }
davidjhoward 149:950c90425f7c 180 if( (iter->second.node == 0) && (iter->second.regType == REG_TYPE_INPUT) ) {
davidjhoward 148:ee3cbaafe355 181 // logInfo("processing PIN input=%s, reg=%d, value=%d",iter->first.c_str(), ModbusRegisterMap[iter->first].reg, (bool)ModbusRegisterMap[iter->first].float_value);
davidjhoward 148:ee3cbaafe355 182 if( ModbusRegisterMap[iter->first].reg == 1 ) {
davidjhoward 148:ee3cbaafe355 183 // digital input
davidjhoward 148:ee3cbaafe355 184 ModbusRegisterMap[iter->first].float_value = (float)flow_switch.read();
davidjhoward 148:ee3cbaafe355 185 } else {
davidjhoward 148:ee3cbaafe355 186 ModbusRegisterMap[iter->first].float_value = (float)dinp2.read();
davidjhoward 81:d45bfa16953a 187 }
davidjhoward 81:d45bfa16953a 188 }
davidjhoward 39:9287c7d59016 189 }
davidjhoward 39:9287c7d59016 190
davidjhoward 149:950c90425f7c 191 // now update all of the virtual registers
davidjhoward 149:950c90425f7c 192 for (iter = ModbusRegisterMap.begin(); iter != ModbusRegisterMap.end(); ++iter) {
davidjhoward 149:950c90425f7c 193 if( (ModbusRegisterMap[iter->first].regType != REG_TYPE_VINPUT) && (ModbusRegisterMap[iter->first].regType != REG_TYPE_VOUTPUT) ) {
davidjhoward 149:950c90425f7c 194 continue;
davidjhoward 149:950c90425f7c 195 }
davidjhoward 149:950c90425f7c 196 logInfo("Processing Virtual Input: vcmd:%s, tag:%s, opl:%s, opr:%s, op:%s, constant:%.4f", iter->second.vcmd.c_str(), iter->first.c_str(),
davidjhoward 149:950c90425f7c 197 VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 149:950c90425f7c 198 VirtualCommandMap[iter->second.vcmd].opr.c_str(),
davidjhoward 149:950c90425f7c 199 VirtualCommandMap[iter->second.vcmd].op.c_str(),
davidjhoward 149:950c90425f7c 200 VirtualCommandMap[iter->second.vcmd].constant
davidjhoward 149:950c90425f7c 201 );
davidjhoward 149:950c90425f7c 202 switch( VirtualCommandMap[iter->second.vcmd].op.c_str()[0] ) {
davidjhoward 149:950c90425f7c 203 case '=':
davidjhoward 149:950c90425f7c 204 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value;
davidjhoward 149:950c90425f7c 205 logInfo("Setting tag=%s, equal to (value=%2.2f)", iter->first.c_str(),
jmarkel44 169:c503848823aa 206 //VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 149:950c90425f7c 207 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value
davidjhoward 149:950c90425f7c 208 );
davidjhoward 149:950c90425f7c 209 break;
davidjhoward 149:950c90425f7c 210 case '*':
davidjhoward 162:5e8948b8044d 211 ModbusRegisterMap[iter->first].float_value =
davidjhoward 162:5e8948b8044d 212 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value *
davidjhoward 162:5e8948b8044d 213 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opr].float_value;
davidjhoward 162:5e8948b8044d 214 logInfo("Setting tag=%s, equal to (%2.2f*%2.2f) = %2.2f", iter->first.c_str(),
jmarkel44 169:c503848823aa 215 //VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 162:5e8948b8044d 216 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value,
davidjhoward 162:5e8948b8044d 217 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opr].float_value,
davidjhoward 162:5e8948b8044d 218 ModbusRegisterMap[iter->first].float_value
davidjhoward 162:5e8948b8044d 219 );
davidjhoward 149:950c90425f7c 220 case '/':
davidjhoward 162:5e8948b8044d 221 if( ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opr].float_value != 0 ) {
davidjhoward 162:5e8948b8044d 222 ModbusRegisterMap[iter->first].float_value =
davidjhoward 162:5e8948b8044d 223 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value /
davidjhoward 162:5e8948b8044d 224 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opr].float_value;
davidjhoward 162:5e8948b8044d 225 logInfo("Setting tag=%s, equal to (%2.2f/%2.2f) = %2.2f", iter->first.c_str(),
jmarkel44 169:c503848823aa 226 //VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 162:5e8948b8044d 227 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value,
davidjhoward 162:5e8948b8044d 228 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opr].float_value,
davidjhoward 162:5e8948b8044d 229 ModbusRegisterMap[iter->first].float_value
davidjhoward 162:5e8948b8044d 230 );
davidjhoward 162:5e8948b8044d 231 } else {
davidjhoward 162:5e8948b8044d 232 logInfo("NOT DOING DIVIDE BY ZERO");
davidjhoward 162:5e8948b8044d 233 }
davidjhoward 162:5e8948b8044d 234 break;
davidjhoward 149:950c90425f7c 235 case '+':
davidjhoward 149:950c90425f7c 236 case '-':
davidjhoward 149:950c90425f7c 237 default:
davidjhoward 149:950c90425f7c 238 break;
davidjhoward 149:950c90425f7c 239 }
davidjhoward 149:950c90425f7c 240 }
davidjhoward 149:950c90425f7c 241
davidjhoward 39:9287c7d59016 242 osEvent evt = ModbusMasterMailBox.get(50);
davidjhoward 39:9287c7d59016 243 if (evt.status == osEventMail) {
davidjhoward 39:9287c7d59016 244 Message_t *mail = (Message_t*)evt.value.p;
davidjhoward 39:9287c7d59016 245 logInfo("Mail Received: Action: %d, New Input File: %s", mail->action, mail->controlFile);
davidjhoward 39:9287c7d59016 246 ModbusMasterMailBox.free(mail);
davidjhoward 39:9287c7d59016 247 ModbusRegisterMap.clear();
davidjhoward 39:9287c7d59016 248 break;
davidjhoward 39:9287c7d59016 249 }
davidjhoward 57:5f18ae91c7c7 250 Thread::wait(5000);
davidjhoward 31:4b1587034318 251 }
jmarkel44 0:65cfa4873284 252 }
davidjhoward 4:c35db3946fd8 253 }
davidjhoward 4:c35db3946fd8 254
davidjhoward 4:c35db3946fd8 255
davidjhoward 4:c35db3946fd8 256 volatile char modbus_buffer_char;
davidjhoward 4:c35db3946fd8 257 volatile bool modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 258
davidjhoward 4:c35db3946fd8 259 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 260 volatile uint8_t modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 261
davidjhoward 4:c35db3946fd8 262 //Frame crc calucation
davidjhoward 4:c35db3946fd8 263 uint16_t modbus_crc(uint8_t* buf, int len)
davidjhoward 4:c35db3946fd8 264 {
davidjhoward 4:c35db3946fd8 265 uint16_t crc = 0xFFFF;
davidjhoward 4:c35db3946fd8 266
davidjhoward 4:c35db3946fd8 267 for (int pos = 0; pos < len; pos++) {
davidjhoward 4:c35db3946fd8 268 crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc
davidjhoward 4:c35db3946fd8 269
davidjhoward 4:c35db3946fd8 270 for (int i = 8; i != 0; i--) {
davidjhoward 4:c35db3946fd8 271 // Loop over each bit
davidjhoward 4:c35db3946fd8 272 if ((crc & 0x0001) != 0) {
davidjhoward 4:c35db3946fd8 273 // If the LSB is set
davidjhoward 4:c35db3946fd8 274 crc >>= 1; // Shift right and XOR 0xA001
davidjhoward 4:c35db3946fd8 275 crc ^= 0xA001;
davidjhoward 4:c35db3946fd8 276 } else // Else LSB is not set
davidjhoward 4:c35db3946fd8 277 crc >>= 1; // Just shift right
davidjhoward 4:c35db3946fd8 278 }
davidjhoward 4:c35db3946fd8 279 }
davidjhoward 4:c35db3946fd8 280 // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes)
davidjhoward 4:c35db3946fd8 281 return crc;
davidjhoward 4:c35db3946fd8 282 }
davidjhoward 4:c35db3946fd8 283
davidjhoward 4:c35db3946fd8 284 RawSerial modbus(PA_2, PA_3);
davidjhoward 57:5f18ae91c7c7 285 DigitalOut mod_de(PB_0);
davidjhoward 57:5f18ae91c7c7 286 DigitalOut mod_re(PB_1);
davidjhoward 4:c35db3946fd8 287
davidjhoward 4:c35db3946fd8 288 void modbus_init( uint16_t baudRate )
davidjhoward 4:c35db3946fd8 289 {
davidjhoward 4:c35db3946fd8 290 modbus.baud(baudRate);
davidjhoward 4:c35db3946fd8 291 modbus.attach(&modbus_recv, RawSerial::RxIrq);
davidjhoward 4:c35db3946fd8 292 }
davidjhoward 4:c35db3946fd8 293
davidjhoward 4:c35db3946fd8 294 //call back when character goes into RX buffer for RS485 modbus
davidjhoward 4:c35db3946fd8 295 void modbus_recv()
davidjhoward 4:c35db3946fd8 296 {
davidjhoward 4:c35db3946fd8 297
davidjhoward 4:c35db3946fd8 298 if (modbus.readable()) {
davidjhoward 4:c35db3946fd8 299 modbus_buffer_char = modbus.getc();
davidjhoward 4:c35db3946fd8 300 if (modbus_input_buffer_counter == 0 && modbus_buffer_char == 0x00) {
davidjhoward 4:c35db3946fd8 301 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 302 } else {
davidjhoward 4:c35db3946fd8 303 modbus_input_buffer[modbus_input_buffer_counter] = modbus_buffer_char;
davidjhoward 4:c35db3946fd8 304 modbus_input_buffer_counter++;
davidjhoward 4:c35db3946fd8 305 }
davidjhoward 4:c35db3946fd8 306 }
davidjhoward 4:c35db3946fd8 307
davidjhoward 4:c35db3946fd8 308 if (modbus_input_buffer_counter > modbus_input_buffer[2] + 4) {
davidjhoward 4:c35db3946fd8 309 modbus_interrupt_complete = true;
davidjhoward 4:c35db3946fd8 310 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 311 }
davidjhoward 4:c35db3946fd8 312 }
davidjhoward 4:c35db3946fd8 313
davidjhoward 4:c35db3946fd8 314 // Read modbus master frame
davidjhoward 9:ef0ca2f8a8a6 315 void SendModbusCommand(uint8_t slave_address, uint16_t firstReg, uint16_t noRegs)
davidjhoward 4:c35db3946fd8 316 {
davidjhoward 4:c35db3946fd8 317 uint8_t L1V[8] = {slave_address, 0x04, 0x00, 0x02, 0x00, 0x02, 0xD1, 0x16};
davidjhoward 4:c35db3946fd8 318
davidjhoward 4:c35db3946fd8 319 L1V[2] = (firstReg >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 320 L1V[3] = firstReg & 0xFF;
davidjhoward 4:c35db3946fd8 321 L1V[4] = (noRegs >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 322 L1V[5] = noRegs & 0xFF;
davidjhoward 4:c35db3946fd8 323 L1V[6] = modbus_crc(L1V,6) & 0xFF;
davidjhoward 4:c35db3946fd8 324 L1V[7] = (modbus_crc(L1V,6)>>8) & 0xFF;
davidjhoward 4:c35db3946fd8 325
davidjhoward 57:5f18ae91c7c7 326 mod_de = 1;
davidjhoward 57:5f18ae91c7c7 327 mod_re = 1;
davidjhoward 57:5f18ae91c7c7 328 Thread::wait(1);
davidjhoward 4:c35db3946fd8 329 for (uint8_t i = 0; i < 8; i++)
davidjhoward 4:c35db3946fd8 330 modbus.putc(L1V[i]);
davidjhoward 4:c35db3946fd8 331
davidjhoward 57:5f18ae91c7c7 332 Thread::wait(2);
davidjhoward 57:5f18ae91c7c7 333 mod_de = 0;
davidjhoward 57:5f18ae91c7c7 334 mod_re = 0;
davidjhoward 4:c35db3946fd8 335
davidjhoward 4:c35db3946fd8 336 }
davidjhoward 4:c35db3946fd8 337
davidjhoward 4:c35db3946fd8 338 bool mbInterruptComplete()
davidjhoward 4:c35db3946fd8 339 {
davidjhoward 4:c35db3946fd8 340 if (modbus_interrupt_complete) {
davidjhoward 4:c35db3946fd8 341 modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 342 return true;
davidjhoward 4:c35db3946fd8 343 } else {
davidjhoward 4:c35db3946fd8 344 return false;
davidjhoward 4:c35db3946fd8 345 }
davidjhoward 4:c35db3946fd8 346 }
davidjhoward 4:c35db3946fd8 347
davidjhoward 15:a6ee32969e8e 348 bool ReadModbus_32bit_float( float *float_value, int order )
davidjhoward 4:c35db3946fd8 349 {
davidjhoward 15:a6ee32969e8e 350 MR_REGISTER_32_BIT_FLOAT value;
davidjhoward 31:4b1587034318 351
davidjhoward 4:c35db3946fd8 352 if (mbInterruptComplete() != true ) {
davidjhoward 4:c35db3946fd8 353 return false;
davidjhoward 4:c35db3946fd8 354 }
davidjhoward 4:c35db3946fd8 355
davidjhoward 15:a6ee32969e8e 356 switch( order ) {
davidjhoward 31:4b1587034318 357 case BigEndian:
davidjhoward 15:a6ee32969e8e 358 value.b.lo_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 359 value.b.lo_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 360 value.b.hi_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 361 value.b.hi_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 362 break;
davidjhoward 15:a6ee32969e8e 363 case BigEndianReverseWord:
davidjhoward 15:a6ee32969e8e 364 value.b.lo_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 365 value.b.lo_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 366 value.b.hi_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 367 value.b.hi_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 368 break;
davidjhoward 15:a6ee32969e8e 369 default:
davidjhoward 15:a6ee32969e8e 370 return false;
davidjhoward 15:a6ee32969e8e 371 }
davidjhoward 15:a6ee32969e8e 372 *float_value = value.f;
davidjhoward 4:c35db3946fd8 373 return true;
davidjhoward 4:c35db3946fd8 374 }