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

LLComms.cpp@33:9877ca32e43c, 2019-03-13 (annotated)

Committer:
WD40andTape
Date:
Wed Mar 13 11:59:58 2019 +0000
Revision:
33:9877ca32e43c
Parent:
29:10a5cf37a875
Child:
34:54e9ebe9e87f
Added support functions - receiving and control.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WD40andTape 8:d6657767a182 1 // LLComms.cpp
WD40andTape 8:d6657767a182 2
WD40andTape 8:d6657767a182 3 #include "LLComms.h"
WD40andTape 8:d6657767a182 4
dofydoink 12:595ed862e52f 5 LLComms::LLComms() :
WD40andTape 13:a373dfc57b89 6 queue(32 * EVENTS_EVENT_SIZE), //32 //8 * EVENTS_EVENT_SIZE
WD40andTape 8:d6657767a182 7 pinGate6(PE_11),
WD40andTape 14:54c3759e76ed 8 spi_0(PC_12, PC_11, PC_10),
WD40andTape 14:54c3759e76ed 9 spi_1(PF_9, PF_8, PF_7),
WD40andTape 8:d6657767a182 10 // These interrupt pins have to be declared AFTER SPI declaration. No Clue Why.
WD40andTape 8:d6657767a182 11 pinGate0(PF_11),
WD40andTape 8:d6657767a182 12 pinGate1(PG_14),
WD40andTape 8:d6657767a182 13 pinGate2(PF_15),
WD40andTape 8:d6657767a182 14 pinGate3(PF_12),
WD40andTape 8:d6657767a182 15 pinGate4(PF_3),
WD40andTape 8:d6657767a182 16 pinGate5(PF_13),
WD40andTape 8:d6657767a182 17 //pinGate6(PE_11), // See above nonsense
WD40andTape 8:d6657767a182 18 pinGate7(PE_13),
dofydoink 12:595ed862e52f 19 pinReset(PD_2)
WD40andTape 8:d6657767a182 20 { // Constructor
WD40andTape 8:d6657767a182 21
WD40andTape 24:bc852aa89e7a 22 spi_0.format(16,2);
WD40andTape 24:bc852aa89e7a 23 spi_0.frequency(LOW_LEVEL_SPI_FREQUENCY);
WD40andTape 24:bc852aa89e7a 24 spi_1.format(16,2);
WD40andTape 24:bc852aa89e7a 25 spi_1.frequency(LOW_LEVEL_SPI_FREQUENCY);
WD40andTape 24:bc852aa89e7a 26
dofydoink 12:595ed862e52f 27 PinName LLPins[8] = {PD_15, PE_10, PD_11, PD_14, PE_7, PD_12, PF_10, PD_13};
dofydoink 12:595ed862e52f 28 //PinName LLPins[8] = {PD_15, PE_10, PD_14, PD_11, PE_7, PD_12, PF_10, PD_13};
WD40andTape 8:d6657767a182 29 PinName ADCPins[8] = {PG_12, PG_9, PE_1, PG_0, PD_0, PD_1, PF_0, PF_1};
WD40andTape 8:d6657767a182 30 for (short int i = 0; i < 8; i++) {
WD40andTape 10:1b6daba32452 31 isDataReady[i] = 0;
WD40andTape 8:d6657767a182 32 cs_LL[i] = new DigitalOut(LLPins[i]);
WD40andTape 8:d6657767a182 33 cs_ADC[i] = new DigitalOut(ADCPins[i]);
WD40andTape 8:d6657767a182 34 }
WD40andTape 10:1b6daba32452 35
WD40andTape 9:cd3607ba5643 36 // Initialise relevant variables
dofydoink 11:7029367a1840 37 for(short int i = 0; i<N_CHANNELS; i++) {
WD40andTape 9:cd3607ba5643 38 // All chip selects in off state
WD40andTape 9:cd3607ba5643 39 *cs_LL[i] = 1;
WD40andTape 9:cd3607ba5643 40 *cs_ADC[i] = 1;
WD40andTape 26:7c59002c9cd7 41 // Initialise pressures/positions
WD40andTape 29:10a5cf37a875 42 pressureSensor_uint[i] = 0.0;
WD40andTape 26:7c59002c9cd7 43 pressureSensor_bar[i] = -1.0;
WD40andTape 29:10a5cf37a875 44 positionSensor_uint[i] = 0.0;
WD40andTape 26:7c59002c9cd7 45 positionSensor_mm[i] = -1.0;
WD40andTape 9:cd3607ba5643 46 }
WD40andTape 9:cd3607ba5643 47 pinReset = 1; // Initialise reset pin to not reset the controllers.
WD40andTape 9:cd3607ba5643 48 wait(0.25);
WD40andTape 9:cd3607ba5643 49 pinReset=0; // Reset controllers to be safe
WD40andTape 9:cd3607ba5643 50 wait(0.25);
WD40andTape 9:cd3607ba5643 51 pinReset = 1; // Ready to go
WD40andTape 10:1b6daba32452 52
WD40andTape 10:1b6daba32452 53 // Set up rise interrupts MIGHT NOT NEED TO BE POINTERS
dofydoink 12:595ed862e52f 54 pinGate0.rise(callback(this,&LLComms::rise0));
dofydoink 12:595ed862e52f 55 pinGate1.rise(callback(this,&LLComms::rise1));
dofydoink 12:595ed862e52f 56 pinGate2.rise(callback(this,&LLComms::rise2));
dofydoink 12:595ed862e52f 57 pinGate3.rise(callback(this,&LLComms::rise3));
dofydoink 12:595ed862e52f 58 pinGate4.rise(callback(this,&LLComms::rise4));
dofydoink 12:595ed862e52f 59 pinGate5.rise(callback(this,&LLComms::rise5));
dofydoink 12:595ed862e52f 60 pinGate6.rise(callback(this,&LLComms::rise6));
dofydoink 12:595ed862e52f 61 pinGate7.rise(callback(this,&LLComms::rise7));
WD40andTape 10:1b6daba32452 62 // Set up fall interrupts MIGHT NOT NEED TO BE POINTERS
dofydoink 12:595ed862e52f 63 pinGate0.fall(callback(this,&LLComms::fall0));
dofydoink 12:595ed862e52f 64 pinGate1.fall(callback(this,&LLComms::fall1));
dofydoink 12:595ed862e52f 65 pinGate2.fall(callback(this,&LLComms::fall2));
dofydoink 12:595ed862e52f 66 pinGate3.fall(callback(this,&LLComms::fall3));
dofydoink 12:595ed862e52f 67 pinGate4.fall(callback(this,&LLComms::fall4));
dofydoink 12:595ed862e52f 68 pinGate5.fall(callback(this,&LLComms::fall5));
dofydoink 12:595ed862e52f 69 pinGate6.fall(callback(this,&LLComms::fall6));
dofydoink 12:595ed862e52f 70 pinGate7.fall(callback(this,&LLComms::fall7));
WD40andTape 9:cd3607ba5643 71 }
WD40andTape 9:cd3607ba5643 72
dofydoink 11:7029367a1840 73 //LLComms::~LLComms(void) { } // Destructor
WD40andTape 26:7c59002c9cd7 74 unsigned int LLComms::formatMessage(short int type, double dblValue, double dblMaxValue) {
WD40andTape 24:bc852aa89e7a 75 // Convert to a 9-bit number
WD40andTape 24:bc852aa89e7a 76 int intValue = (int) ((dblValue/dblMaxValue)*511);
WD40andTape 24:bc852aa89e7a 77 intValue = intValue & 0x1FF; // Ensure number is 9-bit
WD40andTape 24:bc852aa89e7a 78 // Initialize message with value
WD40andTape 24:bc852aa89e7a 79 unsigned int intMsg = intValue;
WD40andTape 24:bc852aa89e7a 80 // Calculate checksum (the decimal sum of the position data)
WD40andTape 24:bc852aa89e7a 81 int intCheckSum = 0, intTempVar = intValue;
WD40andTape 26:7c59002c9cd7 82 while( intTempVar>0 ) {
WD40andTape 24:bc852aa89e7a 83 intCheckSum += intTempVar%10;
WD40andTape 25:88e6cccde856 84 intTempVar = floor(intTempVar/10.0);
WD40andTape 24:bc852aa89e7a 85 }
WD40andTape 24:bc852aa89e7a 86 // Add checksum to message
WD40andTape 24:bc852aa89e7a 87 intMsg = intMsg<<5;
WD40andTape 24:bc852aa89e7a 88 intMsg = intMsg | intCheckSum;
WD40andTape 24:bc852aa89e7a 89 // Add type bit (0 == position, 1 == velocity)
WD40andTape 24:bc852aa89e7a 90 intMsg = intMsg<<1;
WD40andTape 26:7c59002c9cd7 91 intMsg = intMsg | (int)type; // CAST AS BOOL
WD40andTape 24:bc852aa89e7a 92 // Calculate decimal parity check for the whole message
WD40andTape 24:bc852aa89e7a 93 unsigned int count = 0, b = 1;
WD40andTape 24:bc852aa89e7a 94 for(short int i=0; i<32; i++) {
WD40andTape 24:bc852aa89e7a 95 if( intMsg & (b << i) ) count++;
WD40andTape 24:bc852aa89e7a 96 }
WD40andTape 24:bc852aa89e7a 97 // Add parity bit to message (0 == Odd, 1 == Even)
WD40andTape 27:6853ee8ffefd 98 // Parity selected in this way to prevent 0x0000 from passing checks
WD40andTape 24:bc852aa89e7a 99 bool boolParity = !(bool)(count%2);
WD40andTape 24:bc852aa89e7a 100 intMsg = intMsg<<1;
WD40andTape 24:bc852aa89e7a 101 intMsg = intMsg | (int)boolParity;
WD40andTape 26:7c59002c9cd7 102 return intMsg;
WD40andTape 26:7c59002c9cd7 103 }
WD40andTape 26:7c59002c9cd7 104
WD40andTape 26:7c59002c9cd7 105 bool LLComms::CheckMessage(int msg) {
WD40andTape 26:7c59002c9cd7 106 // Find message parity
WD40andTape 26:7c59002c9cd7 107 short int count = 0;
WD40andTape 26:7c59002c9cd7 108 for(short int i=0; i<32; i++) {
WD40andTape 26:7c59002c9cd7 109 if( msg>>1 & (1<<i) ) count++;
WD40andTape 26:7c59002c9cd7 110 }
WD40andTape 26:7c59002c9cd7 111 int intParity = !(count%2);
WD40andTape 26:7c59002c9cd7 112 // Find message CheckSum
WD40andTape 26:7c59002c9cd7 113 int intChkSum = 0;
WD40andTape 26:7c59002c9cd7 114 int intTempVar = msg>>7;
WD40andTape 26:7c59002c9cd7 115 while(intTempVar > 0) {
WD40andTape 26:7c59002c9cd7 116 intChkSum += intTempVar%10;
WD40andTape 26:7c59002c9cd7 117 intTempVar = int(intTempVar/10);
WD40andTape 26:7c59002c9cd7 118 }
WD40andTape 26:7c59002c9cd7 119 // Check if parity and CheckSum match
WD40andTape 26:7c59002c9cd7 120 bool isParityCorrect = (intParity == (msg&0x1));
WD40andTape 26:7c59002c9cd7 121 bool isChkSumCorrect = (intChkSum == ((msg>>2)&0x1F));
WD40andTape 26:7c59002c9cd7 122 bool isCheckPassed = (isParityCorrect && isChkSumCorrect);
WD40andTape 26:7c59002c9cd7 123 return isCheckPassed;
WD40andTape 26:7c59002c9cd7 124 }
WD40andTape 26:7c59002c9cd7 125
WD40andTape 26:7c59002c9cd7 126 bool LLComms::PerformMasterSPI(SPI *spi, unsigned int outboundMsgs[], unsigned int inboundMsgsData[]) {
WD40andTape 26:7c59002c9cd7 127 unsigned int dummyMsg = 0x5555;
WD40andTape 26:7c59002c9cd7 128 bool isSuccess = true;
WD40andTape 26:7c59002c9cd7 129 unsigned int inboundMsg, typeBit;
WD40andTape 27:6853ee8ffefd 130 AnalogIn ain(PA_4); // Random analogue pin
WD40andTape 26:7c59002c9cd7 131 for(short int i=0; i<3; i++) { // Loop 3 times for 3 SPI messages
WD40andTape 27:6853ee8ffefd 132 ain.read_u16(); // Read analogue pin to cause a delay
WD40andTape 27:6853ee8ffefd 133 ain.read_u16();
WD40andTape 26:7c59002c9cd7 134 if(i==0) {
WD40andTape 26:7c59002c9cd7 135 inboundMsg = spi->write(outboundMsgs[0]);
WD40andTape 26:7c59002c9cd7 136 } else if(i==1) {
WD40andTape 26:7c59002c9cd7 137 inboundMsg = spi->write(outboundMsgs[1]);
WD40andTape 26:7c59002c9cd7 138 } else {
WD40andTape 26:7c59002c9cd7 139 inboundMsg = spi->write(dummyMsg);
WD40andTape 26:7c59002c9cd7 140 }
WD40andTape 26:7c59002c9cd7 141 if((unsigned int)inboundMsg != dummyMsg) { // Message is not dummy which is only used for reply
WD40andTape 26:7c59002c9cd7 142 typeBit = inboundMsg>>1 & 0x1;
WD40andTape 26:7c59002c9cd7 143 inboundMsgsData[typeBit] = inboundMsg>>7 & 0x1FF;
WD40andTape 26:7c59002c9cd7 144 if( !CheckMessage(inboundMsg) ) {
WD40andTape 26:7c59002c9cd7 145 isSuccess = false;
WD40andTape 26:7c59002c9cd7 146 }
WD40andTape 26:7c59002c9cd7 147 }
WD40andTape 26:7c59002c9cd7 148 }
WD40andTape 26:7c59002c9cd7 149 return isSuccess;
WD40andTape 24:bc852aa89e7a 150 }
WD40andTape 24:bc852aa89e7a 151
WD40andTape 10:1b6daba32452 152 void LLComms::SendReceiveData(int channel) {
WD40andTape 24:bc852aa89e7a 153 mutChannel[channel].lock(); // Lock mutex for specific Channel
WD40andTape 24:bc852aa89e7a 154
WD40andTape 24:bc852aa89e7a 155 // Construct messages
WD40andTape 26:7c59002c9cd7 156 unsigned int intPositionMsg = formatMessage(0,demandPosition_mm[channel],MAX_ACTUATOR_LIMIT_MM);
WD40andTape 26:7c59002c9cd7 157 unsigned int intVelocityMsg = formatMessage(1,demandSpeed_mmps[channel],MAX_SPEED_MMPS);
WD40andTape 26:7c59002c9cd7 158
WD40andTape 26:7c59002c9cd7 159 *cs_LL[channel] = 0; // Select relevant chip
WD40andTape 26:7c59002c9cd7 160 unsigned int outboundMsgs[2] = { intPositionMsg , intVelocityMsg };
WD40andTape 27:6853ee8ffefd 161 unsigned int inboundMsgsData[2] = { 0 };
WD40andTape 26:7c59002c9cd7 162 bool isSPIsuccess = false;
WD40andTape 26:7c59002c9cd7 163 if( channel < 4 ) {
WD40andTape 26:7c59002c9cd7 164 isSPIsuccess = PerformMasterSPI(&spi_0,outboundMsgs,inboundMsgsData);
WD40andTape 26:7c59002c9cd7 165 } else {
WD40andTape 26:7c59002c9cd7 166 isSPIsuccess = PerformMasterSPI(&spi_1,outboundMsgs,inboundMsgsData);
WD40andTape 26:7c59002c9cd7 167 }
WD40andTape 26:7c59002c9cd7 168 *cs_LL[channel] = 1; // Deselect chip
WD40andTape 26:7c59002c9cd7 169 if( isSPIsuccess ) {
WD40andTape 26:7c59002c9cd7 170 isDataReady[channel] = 0; // Data no longer ready, i.e. we now require new data
WD40andTape 29:10a5cf37a875 171 positionSensor_uint[channel] = inboundMsgsData[0];
WD40andTape 27:6853ee8ffefd 172 positionSensor_mm[channel] = ((double)inboundMsgsData[0]/511) * (double)MAX_ACTUATOR_LENGTH_MM;
WD40andTape 27:6853ee8ffefd 173 positionSensor_mm[channel] = min( max(positionSensor_mm[channel],0.0) , (double)MAX_ACTUATOR_LENGTH_MM );
WD40andTape 29:10a5cf37a875 174 pressureSensor_uint[channel] = inboundMsgsData[1];
WD40andTape 27:6853ee8ffefd 175 pressureSensor_bar[channel] = ((double)inboundMsgsData[1]/511) * (double)MAX_PRESSURE_LIMIT;
WD40andTape 27:6853ee8ffefd 176 pressureSensor_bar[channel] = min( max(pressureSensor_bar[channel],0.0) , (double)MAX_PRESSURE_LIMIT );
WD40andTape 26:7c59002c9cd7 177 } else { // Data is STILL ready and will be resent at the next pin interrupt
WD40andTape 26:7c59002c9cd7 178 //printf("SPI failed: %d%d. Resending.\n\r",isPositionValid,isPressureValid);
WD40andTape 26:7c59002c9cd7 179 }
WD40andTape 26:7c59002c9cd7 180
WD40andTape 26:7c59002c9cd7 181 mutChannel[channel].unlock();//unlock mutex for specific channel
WD40andTape 26:7c59002c9cd7 182 }
WD40andTape 26:7c59002c9cd7 183
WD40andTape 10:1b6daba32452 184 // Common rise handler function
WD40andTape 10:1b6daba32452 185 void LLComms::common_rise_handler(int channel) {
WD40andTape 26:7c59002c9cd7 186 //printf("%d %d common_rise_handler\n\r",channel,isDataReady[channel]);
WD40andTape 26:7c59002c9cd7 187 if (isDataReady[channel]) { // Check if data is ready for transmission
WD40andTape 10:1b6daba32452 188 ThreadID[channel] = queue.call(this,&LLComms::SendReceiveData,channel); // Schedule transmission
WD40andTape 10:1b6daba32452 189 }
WD40andTape 10:1b6daba32452 190 }
WD40andTape 10:1b6daba32452 191
WD40andTape 10:1b6daba32452 192 // Common fall handler functions
WD40andTape 10:1b6daba32452 193 void LLComms::common_fall_handler(int channel) {
WD40andTape 10:1b6daba32452 194 queue.cancel(ThreadID[channel]); // Cancel relevant queued event
WD40andTape 10:1b6daba32452 195 }
WD40andTape 10:1b6daba32452 196
WD40andTape 10:1b6daba32452 197 // Stub rise functions
WD40andTape 10:1b6daba32452 198 void LLComms::rise0(void) { common_rise_handler(0); }
WD40andTape 10:1b6daba32452 199 void LLComms::rise1(void) { common_rise_handler(1); }
WD40andTape 10:1b6daba32452 200 void LLComms::rise2(void) { common_rise_handler(2); }
WD40andTape 10:1b6daba32452 201 void LLComms::rise3(void) { common_rise_handler(3); }
WD40andTape 10:1b6daba32452 202 void LLComms::rise4(void) { common_rise_handler(4); }
WD40andTape 10:1b6daba32452 203 void LLComms::rise5(void) { common_rise_handler(5); }
WD40andTape 10:1b6daba32452 204 void LLComms::rise6(void) { common_rise_handler(6); }
WD40andTape 10:1b6daba32452 205 void LLComms::rise7(void) { common_rise_handler(7); }
WD40andTape 10:1b6daba32452 206 // Stub fall functions
WD40andTape 10:1b6daba32452 207 void LLComms::fall0(void) { common_fall_handler(0); }
WD40andTape 10:1b6daba32452 208 void LLComms::fall1(void) { common_fall_handler(1); }
WD40andTape 10:1b6daba32452 209 void LLComms::fall2(void) { common_fall_handler(2); }
WD40andTape 10:1b6daba32452 210 void LLComms::fall3(void) { common_fall_handler(3); }
WD40andTape 10:1b6daba32452 211 void LLComms::fall4(void) { common_fall_handler(4); }
WD40andTape 10:1b6daba32452 212 void LLComms::fall5(void) { common_fall_handler(5); }
WD40andTape 10:1b6daba32452 213 void LLComms::fall6(void) { common_fall_handler(6); }
WD40andTape 25:88e6cccde856 214 void LLComms::fall7(void) { common_fall_handler(7); }