MorphGI / Mbed OS MGI_Rebuild_MidLevel_9_0-Basic_PWM

Basic Mid-Level control for the rebuilt MorphGI control unit, using PWM to communicate with the low level controllers.

Dependencies:   ros_lib_kinetic

main.cpp@24:bc852aa89e7a, 2018-12-17 (annotated)

Committer:
WD40andTape
Date:
Mon Dec 17 14:34:37 2018 +0000
Revision:
24:bc852aa89e7a
Parent:
23:61526647cc8a
Child:
25:88e6cccde856
Updating ML/LL communications.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WD40andTape 7:5b6a2cefbf3b 1 // STANDARD IMPORTS
WD40andTape 7:5b6a2cefbf3b 2 #include "math.h"
WD40andTape 7:5b6a2cefbf3b 3 // MBED IMPORTS
dofydoink 0:607bc887b6e0 4 #include "mbed.h"
WD40andTape 6:f0a18e28a322 5 #include "mbed_events.h"
WD40andTape 7:5b6a2cefbf3b 6 // CUSTOM IMPORTS
dofydoink 12:595ed862e52f 7 #include "MLSettings.h"
WD40andTape 7:5b6a2cefbf3b 8 #include "HLComms.h"
WD40andTape 8:d6657767a182 9 #include "LLComms.h"
dofydoink 0:607bc887b6e0 10
WD40andTape 22:82871f00f89d 11 //!!!!!!!!!!!!!!!!!!!! CHECK POSITION SENSOR IS FROM 0 AND IN METERS
WD40andTape 22:82871f00f89d 12
dofydoink 12:595ed862e52f 13 // Maximum achievable mm path tolerance plus additional % tolerance
WD40andTape 21:0b10d8e615d1 14 const float FLT_PATH_TOLERANCE = MAX_SPEED_MMPS * (1/LL_DEMANDS_FREQ_HZ) * (1.0f+FLT_PERCENT_PATH_TOLERANCE);
dofydoink 0:607bc887b6e0 15
WD40andTape 21:0b10d8e615d1 16 // DEMAND VARIABLES
WD40andTape 21:0b10d8e615d1 17 double dblDemandVelocity_mmps[N_CHANNELS] = { 0.0 }; // The linear path velocity (not sent to actuator)
WD40andTape 21:0b10d8e615d1 18 double dblDemandPosition_mtrs[N_CHANNELS] = { 0.0 }; // The final target position for the actuator
dofydoink 11:7029367a1840 19
WD40andTape 7:5b6a2cefbf3b 20 Serial pc(USBTX, USBRX); // tx, rx for usb debugging
dofydoink 12:595ed862e52f 21 LLComms llcomms;
WD40andTape 16:1e2804a4e5bd 22 HLComms hlcomms(SERVER_PORT);
WD40andTape 3:c83291bf9fd2 23
WD40andTape 10:1b6daba32452 24 Thread threadLowLevelSPI(osPriorityRealtime);
WD40andTape 21:0b10d8e615d1 25 Thread threadSetDemands(osPriorityNormal);
WD40andTape 4:303584310071 26 Thread threadReceiveAndReplan(osPriorityBelowNormal);
WD40andTape 17:bbaf3e8440ad 27 Thread threadSensorFeedback(osPriorityBelowNormal);
dofydoink 0:607bc887b6e0 28
WD40andTape 4:303584310071 29 Mutex mutPathIn;
WD40andTape 21:0b10d8e615d1 30 Semaphore semLLcomms(1);
WD40andTape 17:bbaf3e8440ad 31 Semaphore semSensorData(1);
dofydoink 0:607bc887b6e0 32
WD40andTape 21:0b10d8e615d1 33 Ticker setDemandsTicker;
WD40andTape 17:bbaf3e8440ad 34 Ticker SendSensorDataTicker;
WD40andTape 17:bbaf3e8440ad 35
WD40andTape 17:bbaf3e8440ad 36
WD40andTape 17:bbaf3e8440ad 37 void sendSensorData() {
WD40andTape 17:bbaf3e8440ad 38 while( true ) {
WD40andTape 17:bbaf3e8440ad 39 semSensorData.wait();
WD40andTape 22:82871f00f89d 40 int error_code = hlcomms.send_sensor_message(llcomms.positionSensor_m,llcomms.pressureSensor_bar);
WD40andTape 17:bbaf3e8440ad 41 /*if( error_code < 0 ) {
WD40andTape 17:bbaf3e8440ad 42 if(IS_PRINT_OUTPUT) printf("Error %i. Could not send data over the TCP socket. "
WD40andTape 17:bbaf3e8440ad 43 "Perhaps the server socket is not bound or not set to listen for connections? "
WD40andTape 17:bbaf3e8440ad 44 "Or the socket is set to non-blocking or timed out?\n\r", error_code);
WD40andTape 17:bbaf3e8440ad 45 hlcomms.close_server();
WD40andTape 17:bbaf3e8440ad 46 return;
WD40andTape 17:bbaf3e8440ad 47 }*/
WD40andTape 17:bbaf3e8440ad 48 }
WD40andTape 17:bbaf3e8440ad 49 }
WD40andTape 17:bbaf3e8440ad 50
WD40andTape 17:bbaf3e8440ad 51 void signalSendSensorData() {
WD40andTape 17:bbaf3e8440ad 52 semSensorData.release();
WD40andTape 17:bbaf3e8440ad 53 }
dofydoink 0:607bc887b6e0 54
WD40andTape 7:5b6a2cefbf3b 55 // This function will be called when a new transmission is received from high level
WD40andTape 7:5b6a2cefbf3b 56 void ReceiveAndReplan() {
WD40andTape 6:f0a18e28a322 57
WD40andTape 6:f0a18e28a322 58 int error_code;
WD40andTape 7:5b6a2cefbf3b 59 error_code = hlcomms.setup_server();
WD40andTape 6:f0a18e28a322 60 if( error_code == -1 ) return;
WD40andTape 7:5b6a2cefbf3b 61 error_code = hlcomms.accept_connection();
WD40andTape 7:5b6a2cefbf3b 62 if( error_code == -1 ) {
WD40andTape 7:5b6a2cefbf3b 63 hlcomms.close_server();
WD40andTape 7:5b6a2cefbf3b 64 return;
WD40andTape 7:5b6a2cefbf3b 65 }
WD40andTape 6:f0a18e28a322 66
WD40andTape 22:82871f00f89d 67 SendSensorDataTicker.attach(&signalSendSensorData, 1/(float)SENSOR_FEEDBACK_HZ); // Set up planning thread to recur at fixed intervals
WD40andTape 17:bbaf3e8440ad 68
WD40andTape 7:5b6a2cefbf3b 69 struct msg_format input; //hlcomms.msg_format
WD40andTape 4:303584310071 70
WD40andTape 6:f0a18e28a322 71 while( true ) {
WD40andTape 6:f0a18e28a322 72 // RECEIVE MESSAGE
WD40andTape 9:cd3607ba5643 73 error_code = hlcomms.receive_message();
WD40andTape 6:f0a18e28a322 74 if( error_code == NSAPI_ERROR_NO_CONNECTION ) { // -3004
dofydoink 12:595ed862e52f 75 if(IS_PRINT_OUTPUT) printf("Client disconnected.\n\r");
WD40andTape 7:5b6a2cefbf3b 76 hlcomms.close_server();
WD40andTape 6:f0a18e28a322 77 return;
WD40andTape 6:f0a18e28a322 78 } else if( error_code < 0 ) {
dofydoink 12:595ed862e52f 79 if(IS_PRINT_OUTPUT) printf("Error %i. Could not send data over the TCP socket. "
WD40andTape 6:f0a18e28a322 80 "Perhaps the server socket is not connected to a remote host? "
WD40andTape 6:f0a18e28a322 81 "Or the socket is set to non-blocking or timed out?\n\r", error_code);
WD40andTape 7:5b6a2cefbf3b 82 hlcomms.close_server();
WD40andTape 6:f0a18e28a322 83 return;
WD40andTape 6:f0a18e28a322 84 }
WD40andTape 17:bbaf3e8440ad 85 // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! RECV MUTEX
WD40andTape 9:cd3607ba5643 86 input = hlcomms.process_message();
WD40andTape 1:2a43cf183a62 87
WD40andTape 7:5b6a2cefbf3b 88 // PROCESS INPUT
WD40andTape 19:e5acb2183d4e 89 if(IS_PRINT_OUTPUT) printf("REPLAN, %f\r\n",input.speed);
WD40andTape 14:54c3759e76ed 90
WD40andTape 19:e5acb2183d4e 91 double dblTarget_mm[N_CHANNELS]; // The currenly assigned final target position (actuator will reach this at end of path)
WD40andTape 19:e5acb2183d4e 92 // Update rear segment
WD40andTape 19:e5acb2183d4e 93 dblTarget_mm[3] = input.psi[0][0]*1000;
WD40andTape 19:e5acb2183d4e 94 dblTarget_mm[5] = 0.0; //input.psi[0][1]*1000;
WD40andTape 19:e5acb2183d4e 95 dblTarget_mm[6] = 0.0; //input.psi[0][2]*1000;
WD40andTape 19:e5acb2183d4e 96 // Update mid segment
WD40andTape 19:e5acb2183d4e 97 dblTarget_mm[4] = input.psi[1][0]*1000;
WD40andTape 19:e5acb2183d4e 98 dblTarget_mm[7] = dblTarget_mm[4]; // Same because two pumps are used
WD40andTape 14:54c3759e76ed 99 // Update front segment
WD40andTape 19:e5acb2183d4e 100 dblTarget_mm[0] = input.psi[2][0]*1000;
WD40andTape 19:e5acb2183d4e 101 dblTarget_mm[1] = input.psi[2][1]*1000;
WD40andTape 19:e5acb2183d4e 102 dblTarget_mm[2] = input.psi[2][2]*1000;
dofydoink 11:7029367a1840 103
WD40andTape 21:0b10d8e615d1 104 // Lock mutex, preventing setDemandsForLL from running
WD40andTape 19:e5acb2183d4e 105 mutPathIn.lock();
WD40andTape 19:e5acb2183d4e 106 // Limit requested speed
WD40andTape 19:e5acb2183d4e 107 double limitedSpeed_mmps = min( max( 0.0 , input.speed ) , (double)MAX_SPEED_MMPS );
WD40andTape 19:e5acb2183d4e 108 // For each actuator, limit the input position, calculate the position change, and select the absolute max
WD40andTape 19:e5acb2183d4e 109 double dblDisplacementToTarget_mm[N_CHANNELS];
WD40andTape 19:e5acb2183d4e 110 double maxDistanceToTarget_mm = 0.0;
WD40andTape 19:e5acb2183d4e 111 for(int i=0; i<N_CHANNELS; i++) {
WD40andTape 19:e5acb2183d4e 112 // If requested position is negative
WD40andTape 19:e5acb2183d4e 113 if(dblTarget_mm[i]<0) {
WD40andTape 19:e5acb2183d4e 114 // Set actuator position change to 0
WD40andTape 19:e5acb2183d4e 115 dblDisplacementToTarget_mm[i] = 0.0;
WD40andTape 19:e5acb2183d4e 116 } else { // Requested position is positive
WD40andTape 19:e5acb2183d4e 117 // ? Limit requested chamber lengths
WD40andTape 19:e5acb2183d4e 118 // ? Convert from chamber length to actuator space
WD40andTape 19:e5acb2183d4e 119 // Limit actuator position
WD40andTape 21:0b10d8e615d1 120 dblTarget_mm[i] = min( max( 0.0 , dblTarget_mm[i] ) , (double)MAX_ACTUATOR_LIMIT ); // !!! USE A CONSTANT FOR THIS
WD40andTape 19:e5acb2183d4e 121 // Calculate actuator position change
WD40andTape 22:82871f00f89d 122 double dblCurrentPosition = llcomms.positionSensor_m[i];
WD40andTape 19:e5acb2183d4e 123 dblDisplacementToTarget_mm[i] = dblTarget_mm[i] - dblCurrentPosition;
WD40andTape 19:e5acb2183d4e 124 // Select the max absolute actuator position change
WD40andTape 19:e5acb2183d4e 125 if(fabs(dblDisplacementToTarget_mm[i])>maxDistanceToTarget_mm) {
WD40andTape 19:e5acb2183d4e 126 maxDistanceToTarget_mm = fabs(dblDisplacementToTarget_mm[i]);
WD40andTape 19:e5acb2183d4e 127 }
WD40andTape 19:e5acb2183d4e 128 }
dofydoink 11:7029367a1840 129 }
WD40andTape 19:e5acb2183d4e 130 // For max actuator position change, calculate the time to destination at the limited speed
WD40andTape 19:e5acb2183d4e 131 double maxTimeToTarget_s = fabs(maxDistanceToTarget_mm) / limitedSpeed_mmps;
WD40andTape 19:e5acb2183d4e 132 // For each actuator, replan target position and velocity as required
WD40andTape 19:e5acb2183d4e 133 for(int i=0; i<N_CHANNELS; i++) {
WD40andTape 19:e5acb2183d4e 134 // If requested actuator position change is already within tolerance, do NOT replan that actuator
WD40andTape 19:e5acb2183d4e 135 if( fabs(dblDisplacementToTarget_mm[i]) < FLT_PATH_TOLERANCE ) continue;
WD40andTape 19:e5acb2183d4e 136 // Calculate velocity for each motor to synchronise movements to complete in max time
WD40andTape 21:0b10d8e615d1 137 // Set dblDemandPosition_mtrs and dblDemandVelocity_mmps
WD40andTape 21:0b10d8e615d1 138 dblDemandPosition_mtrs[i] = dblTarget_mm[i];
WD40andTape 21:0b10d8e615d1 139 dblDemandVelocity_mmps[i] = dblDisplacementToTarget_mm[i] / maxTimeToTarget_s;
WD40andTape 19:e5acb2183d4e 140 }
WD40andTape 21:0b10d8e615d1 141 // Unlock mutex, allowing setDemandsForLL to run again
WD40andTape 19:e5acb2183d4e 142 mutPathIn.unlock();
dofydoink 12:595ed862e52f 143
WD40andTape 6:f0a18e28a322 144 // SEND MESSAGE
WD40andTape 19:e5acb2183d4e 145 error_code = hlcomms.send_duration_message(&maxTimeToTarget_s);
WD40andTape 6:f0a18e28a322 146 if( error_code < 0 ) {
dofydoink 12:595ed862e52f 147 if(IS_PRINT_OUTPUT) printf("Error %i. Could not send data over the TCP socket. "
WD40andTape 6:f0a18e28a322 148 "Perhaps the server socket is not bound or not set to listen for connections? "
WD40andTape 6:f0a18e28a322 149 "Or the socket is set to non-blocking or timed out?\n\r", error_code);
WD40andTape 7:5b6a2cefbf3b 150 hlcomms.close_server();
WD40andTape 6:f0a18e28a322 151 return;
WD40andTape 6:f0a18e28a322 152 }
WD40andTape 6:f0a18e28a322 153 }
WD40andTape 6:f0a18e28a322 154
dofydoink 0:607bc887b6e0 155 }
dofydoink 0:607bc887b6e0 156
WD40andTape 24:bc852aa89e7a 157 void startLLcomms() { // Send new demands to LL after receiving new target data
WD40andTape 24:bc852aa89e7a 158 semLLcomms.release(); // Uses threadSetDemands which is normal priority
WD40andTape 24:bc852aa89e7a 159 }
WD40andTape 24:bc852aa89e7a 160
WD40andTape 21:0b10d8e615d1 161 void setDemandsForLL() {
WD40andTape 21:0b10d8e615d1 162
WD40andTape 4:303584310071 163 while(1) {
WD40andTape 21:0b10d8e615d1 164 semLLcomms.wait();
WD40andTape 21:0b10d8e615d1 165
WD40andTape 21:0b10d8e615d1 166 mutPathIn.lock(); // Lock relevant mutex
WD40andTape 21:0b10d8e615d1 167 for(short int i=0; i<N_CHANNELS; i++) { // For each LL
WD40andTape 21:0b10d8e615d1 168 llcomms.mutChannel[i].lock(); // MUTEX LOCK
WD40andTape 24:bc852aa89e7a 169 llcomms.demandPosition[i] = dblDemandPosition_mtrs[i];
WD40andTape 24:bc852aa89e7a 170 llcomms.demandSpeed[i] = dblDemandVelocity_mmps[i];
WD40andTape 21:0b10d8e615d1 171 llcomms.mutChannel[i].unlock(); // MUTEX UNLOCK
WD40andTape 22:82871f00f89d 172 llcomms.isDataReady[i] = 1; // Signal that data ready
WD40andTape 21:0b10d8e615d1 173 } // end for
WD40andTape 21:0b10d8e615d1 174 mutPathIn.unlock(); // Unlock relevant mutex
WD40andTape 24:bc852aa89e7a 175 } // end while(1)
WD40andTape 7:5b6a2cefbf3b 176
WD40andTape 3:c83291bf9fd2 177 }
dofydoink 0:607bc887b6e0 178
WD40andTape 13:a373dfc57b89 179 int main() {
WD40andTape 7:5b6a2cefbf3b 180 pc.baud(BAUD_RATE);
WD40andTape 17:bbaf3e8440ad 181 printf("ML engage. Compiled at %s\r\n.",__TIME__);
dofydoink 5:712e7634c779 182 wait(3);
WD40andTape 9:cd3607ba5643 183
WD40andTape 10:1b6daba32452 184 threadLowLevelSPI.start(callback(&llcomms.queue, &EventQueue::dispatch_forever)); // Start the event queue
WD40andTape 7:5b6a2cefbf3b 185 threadReceiveAndReplan.start(ReceiveAndReplan);// Start replanning thread
WD40andTape 21:0b10d8e615d1 186 threadSetDemands.start(setDemandsForLL); // Start planning thread
WD40andTape 17:bbaf3e8440ad 187 threadSensorFeedback.start(sendSensorData); // Start sensor feedback thread
WD40andTape 7:5b6a2cefbf3b 188
WD40andTape 24:bc852aa89e7a 189 setDemandsTicker.attach(&startLLcomms, 1/(float)LL_DEMANDS_FREQ_HZ); // Set up LL comms thread to recur at fixed intervals
dofydoink 0:607bc887b6e0 190
WD40andTape 7:5b6a2cefbf3b 191 Thread::wait(1);
WD40andTape 1:2a43cf183a62 192 while(1) {
WD40andTape 1:2a43cf183a62 193 Thread::wait(osWaitForever);
dofydoink 0:607bc887b6e0 194 }
WD40andTape 7:5b6a2cefbf3b 195 }