Version 3 is with update to the test rig with a linear actuator
Dependencies: SPTE_10Bar_5V mbed AS5048 SDFileSystem MODSERIAL PinDetect LCM101 LinearActuator
main.cpp
- Committer:
- surajgiri
- Date:
- 2020-10-20
- Revision:
- 13:219c16e7d32c
- Parent:
- 11:fc82dd22a527
File content as of revision 13:219c16e7d32c:
/** * Author: Allan Veale * Date: 27/11/19 * Purpose: Datalog from the active wearable test rig fitted with the first * realistic (foam tissue) leg */ //Both the general mbed header and the test rig bench header are needed #include "mbed.h" #include "bench.h" //Example experiment method void runFatigueExperiment0(int cycles, float targetkPa, float inflateTimeOut,float deflateTimeOut); void runFailureExp0(float targetkPa); void runBenchmarkExperiment0(); void runBenchmarkExperiment1(int pwm, int cycles, int logHz); //Methods for testing DAC chip - leave for now void selectDACB(); void deselectDACB(); void testDAC(); void testToggleChannel(); DigitalOut myled(LED1); DigitalOut CSA(DAC_CSA); DigitalOut CSB(DAC_CSB); SPI spi(DAC_MOSI,DAC_MISO,DAC_SCLK); // Create bench object - this is used to control the test rig Bench leg; /** * Main loop */ int main() { leg.setLoggingFrequency(10); //Set datalogging frequency /* Two extra columns of data will be recorded in this experiment. One for the target pressure, and the other for the number of sit and stand cycles currently completed in the experiment */ string colNames[] = {"Target pressure (kPa)","Cycle",}; //add data headings leg.setExtraColumns(colNames,2); float targetP = 300; int expCycles = 40; //Number of sit to stand to sit cycles float vals[] = {targetP,0}; //set initial values of data that will be logged leg.setExtraData(vals); /* Setup all peripherals on rig, display info about SD card and the user interface menu */ leg.initialise(); //this gives the 10MHz, normal clock polarity, mode 1 spi we need, pins are same as for encoder /*Run an experiment when the button is pressed to start datalogging and stop it if the button is pressed again to stop datalogging (or when experiment stops - then datalogging stops by itself) */ while (true) { if (leg.isLogging()) { leg.pc.printf("Logging started"); runFatigueExperiment0(expCycles,targetP,10,10); //runBenchmarkExperiment0(); runBenchmarkExperiment1(75, 1, 10); //runFailureExp0(targetP); } wait(0.5); } } /** * Shows how a demo experiment works. This experiment pressurises the leg to * pressure targetkPa, depressurises it, and then repeats the process cycles * number of times * @param cycles: the number of cycles the leg goes up and down * @param targetkPa: the pressure at which the valve is opened to let the leg go down */ void runFatigueExperiment0(int cycles, float targetkPa, float inflateTimeOut, float deflateTimeOut) { //leg.pc.printf("\r\nEntered experiment"); //The experiment starts when logging does Timer flowT;//used to time flow into and out of actuator float loopTime = 0.1; //(s) time between checking pressure int num_file = 1; //number of data files to save for (int i=0; i<num_file; i++) { leg.StartLogging(); //Stop the Bench class from printing, so this method can print leg.pausePrint(); // Pressurise and depressurise the leg cycles number of times for (int i=0; i<cycles; i++) { leg.pc.printf("\r\nCycle: \t%i out of \t%i",i+1,cycles); //Update cycles logged float data[] = {targetkPa,i+1}; leg.setExtraData(data); //Pressurise leg.setValve(true); flowT.reset(); flowT.start();// start inflation timer //Wait until measured pressure reaches target pressure while(leg.getPressure0()*100 < targetkPa && flowT.read() < inflateTimeOut) { //Keep checking logging is going //experimentRunning = leg.isLogging(); //leg.pc.printf("\r\nPressure (kPa): \t%7.2f",leg.getPressure0()*100); if (!leg.isLogging()) { leg.pc.printf("\r\nExit A"); //Logging stopped //leg.pc.printf("\r\nPressurising exit"); leg.setValve(false); //Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } leg.LogData(); wait(loopTime);//Wait a bit } leg.pc.printf("\r\nTimer inflate: \t%7.2f",flowT.read()); if(flowT.read() >= inflateTimeOut) { leg.pc.printf("\r\nExit B"); //Logging stopped leg.setValve(false); //Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } //Depressurise leg.pausePrint(); leg.setValve(false); flowT.reset(); /*Wait until depressurised (completely depressurised is around 10-12 kPa due to current sensor calibration)*/ while(leg.getPressure0()*100 > 15 && flowT.read() < deflateTimeOut) { //leg.pc.printf("\r\nDepressurising"); //Keep checking logging is going //experimentRunning = leg.isLogging(); //leg.pc.printf("\r\nPressure (kPa): \t%7.2f",leg.getPressure0()*100); if (!leg.isLogging()) { leg.pc.printf("\r\nExit C"); //Logging stopped leg.setValve(false); //Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } leg.LogData(); wait(loopTime);//Wait a bit } leg.pc.printf("\r\nTimer deflate: \t%7.2f",flowT.read()); if(flowT.read() >= deflateTimeOut) { leg.pc.printf("\r\nExit D"); //Logging stopped leg.setValve(false); //Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } } // Logging stopped as experiment is fully completed leg.pc.printf("\r\nExit D"); leg.setValve(false); //Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print } } void runBenchmarkExperiment0() { //Pressurise leg.StartLogging(); while(leg.isLogging()) { leg.setValve(true); leg.pc.printf("\r\nPressure (kPa): \t%7.2f",leg.getPressure0()*100); leg.LogData(); wait(0.1); } //Depressurise leg.pc.printf("\r\nExit Benchmarking Test"); leg.setValve(false); leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print } /** * A performance test with the linear actuator * @param pwm: actuator speed * @param cycles: the number of up and down cycles of the leg * @param logHz: datalogging frequency */ void runBenchmarkExperiment1(int pwm, int cycles, int logHz) { int minForce = 5; //N force at which cycle goes from extension to flexion int maxAngle = 70; //deg angle at which cycle goes from flexion to extension double logTime = 1/logHz;//s interval between logging data //Stop the Bench class from printing, so this method can print leg.pausePrint(); //Pressurise leg.setValve(true); Timer t; t.reset(); t.start(); while(leg.isLogging() && t.read() < 3) { leg.pc.printf("\r\nPressure (kPa): \t%7.2f",leg.getPressure0()*100); wait(0.2); } leg.StartLogging(); // in loop for (int i=0; i<cycles; i++) { //allow leg to go up until force is below threshold leg.setPWM(pwm); leg.setDir(0); leg.pc.printf("\r\nExtending: \t%i",cycles); while((leg.getForce() >= minForce) && leg.isLogging()) { leg.pc.printf("\r\nForce (N): \t%7.2f",leg.getForce()); leg.LogData(); wait(logTime); } if (!leg.isLogging()) { leg.pc.printf("\r\nExit A"); //Logging stopped leg.setPWM(0); leg.setValve(false);//Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } //allow leg to go down until angle is greater than threshold leg.setPWM(pwm); leg.setDir(1); leg.pc.printf("\r\nFlexing: \t%i",cycles); while((leg.getDegrees(0) <= maxAngle) && leg.isLogging()) { leg.pc.printf("\r\nAngle (deg): \t%7.2f",leg.getDegrees(0)); leg.LogData(); wait(logTime); } if (!leg.isLogging()) { leg.pc.printf("\r\nExit B"); //Logging stopped leg.setPWM(0); leg.setValve(false);//Depressurise leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print return; } } //Depressurise leg.pc.printf("\r\nExit Benchmarking Test"); leg.setPWM(0); leg.setValve(false); leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print } void runFailureExp0(float targetkPa) { //Pressurise leg.StartLogging(); while(leg.isLogging()) { leg.setValve(true); leg.pc.printf("\r\nPressure (kPa): \t%7.2f",leg.getPressure0()*100); leg.LogData(); wait(0.1); } //Depressurise leg.pc.printf("\r\nExit Benchmarking Test"); leg.setValve(false); leg.StopLogging(); //Stop logging data leg.resumePrint(); //Let the Bench class print } void testDAC() { //setup SPI to write 8 bit words, mode 1 and turn select lines high spi.format(8,1); spi.frequency(200000); deselectDACB(); wait_ms(20); //Power up DAC selectDACB(); spi.write(0xE0); spi.write(0x00); deselectDACB(); //Write a value to a channel selectDACB(); spi.write(0x47); spi.write(0xFF); deselectDACB(); /* selectDACB(); spi.write(0x2F); spi.write(0xFF); deselectDACB(); selectDACB(); spi.write(0x60); spi.write(0x00); deselectDACB();*/ //wait(3); //Write a value to a channel /* selectDACB(); spi.write(0x40); spi.write(0x00); deselectDACB();*/ while (true) { myled = !myled; wait_ms(500); } } /** Selects DAC B (enable line goes low) */ void selectDACB() { CSB.write(0); wait_us(1); } /** Deselects DAC B (enable line goes high) */ void deselectDACB() { CSB.write(1); wait_us(1); } void testToggleChannel() { // POWER up dac //select chip CSB.write(0); wait_us(1); spi.write(0b11100000); spi.write(0b00000000); //deselect chip CSB.write(1); wait_us(1); //write output on a //select chip CSB.write(0); wait_us(1); spi.write(0b01000011); spi.write(0b11111111); //deselect chip CSB.write(1); wait_us(1); //write output on b //select chip CSB.write(0); wait_us(1); spi.write(0b01011011); spi.write(0b11111111); //deselect chip CSB.write(1); wait_us(1); while (true) { //leg.pc.printf("Hi"); // POWER up dac //select chip CSB.write(0); wait_us(1); spi.write(0b11100000); spi.write(0b00000000); //deselect chip CSB.write(1); wait_us(1); //write output on a //select chip CSB.write(0); wait_us(1); spi.write(0b01010011); spi.write(0b11111111); spi.write(0b01001011); spi.write(0b11111111); //deselect chip CSB.write(1); wait_us(1); wait_ms(100); } bool ch = true; while (true) { //data value unsigned int data = 0xFFF; //if more than 12 bits (0xfff) then set all bits true) if (data > 0xFFF) { data = 0xFFF; } //select chip //bring cs low CSB.write(0); //wait a bit (more than 40ns) wait_us(1); //transfer a command (for channel a 0x4<<12 + data masked to 12 bits, for channel b 0x5<<12 + data masked to 12 bits) int command = (0x01<<12);//default to channel a /*if (!ch) { command = (0x05<<12); } */ data = command + (data&0xFFF); //spi.write(data); spi.write(data>>8); spi.write(data & 0x00FF); //bring cs high CSB.write(1); //wait a bit (more than 10-15ns) wait_us(1); wait_ms(10); //leg.pc.printf("\r\nCommand: \t%i",command); //leg.pc.printf("\r\nData: \t%i",data); ch = !ch; } }