Mathew Swabey / Mbed OS ELEC350_Project2

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Dependencies:   serial_terminal sample_hardware PLL_Config SDCard BMP280 Networkbits TextLCD SDBlockDevice

main.cpp@24:81981815ef20, 2018-12-19 (annotated)

Committer:
Swabey89
Date:
Wed Dec 19 13:09:42 2018 +0000
Revision:
24:81981815ef20
Parent:
23:f87fe0c55894
Child:
25:831dc928ccde
SD card mount and unmount, locks required

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Swabey89 7:e2bf2d703867 1 #include "mbed.h"
Swabey89 1:31c7b4ab552b 2 #include "sample_hardware.hpp"
Swabey89 21:2c438eeaab14 3 #include "Networking.hpp"
Swabey89 5:956984cbe447 4 #include "serial_terminal.hpp"
Swabey89 6:a5394c9e5927 5 #include "SDCard.hpp"
Swabey89 5:956984cbe447 6 #include "rtos.h"
Swabey89 11:3ad0327e8c9f 7 #include "events/mbed_events.h"
Swabey89 8:c81b0ff8b822 8 #include "LCDdisplay.hpp"
Swabey89 5:956984cbe447 9
Swabey89 24:81981815ef20 10 //Defines TEST FOR SD CARD MOUNT AND UNMOUNT
Swabey89 24:81981815ef20 11 #define EDGE_FALLEN 0
Swabey89 24:81981815ef20 12 #define EDGE_RISEN 1
Swabey89 19:88d8359306a4 13
Swabey89 10:0fffc988d325 14 //Signals
Swabey89 8:c81b0ff8b822 15 #define TAKE_SAMPLE 1
Swabey89 19:88d8359306a4 16 #define STORE_DATA 2
Swabey89 10:0fffc988d325 17
Swabey89 24:81981815ef20 18
Swabey89 17:ead43c1b729d 19 //Global variables
Swabey89 19:88d8359306a4 20
Swabey89 19:88d8359306a4 21 unsigned int newestIndex = BUFFERSIZE-1; //First time it is incremented, it will be 0
Swabey89 19:88d8359306a4 22 unsigned int oldestIndex = BUFFERSIZE-1;
Swabey89 17:ead43c1b729d 23 FILE* fp;
Swabey89 17:ead43c1b729d 24 FATFileSystem* fs;
Swabey89 10:0fffc988d325 25
Swabey89 19:88d8359306a4 26 //Shared mutable variables VOLATILE
Swabey89 23:f87fe0c55894 27 bool sd_init;
Swabey89 22:d9cbbbf3cf69 28 float sample_rate = 15; //is it?
Swabey89 17:ead43c1b729d 29 struct tm* timeData;
Swabey89 18:3edfb9152b05 30 char cmdBuffer[256];
Swabey89 19:88d8359306a4 31 sensorData buffer[BUFFERSIZE];
Swabey89 17:ead43c1b729d 32 RawSerial* pc;
Swabey89 8:c81b0ff8b822 33
Swabey89 19:88d8359306a4 34 //Thread synchronisation primatives
Swabey89 19:88d8359306a4 35 Semaphore spaceAvailable(BUFFERSIZE);
Swabey89 19:88d8359306a4 36 Semaphore samplesInBuffer(0);
Swabey89 19:88d8359306a4 37 Mutex bufferLock;
Swabey89 19:88d8359306a4 38
Swabey89 8:c81b0ff8b822 39 //Queues
Swabey89 11:3ad0327e8c9f 40 EventQueue SDqueue(32*EVENTS_EVENT_SIZE);
Swabey89 11:3ad0327e8c9f 41 EventQueue LCDqueue(32*EVENTS_EVENT_SIZE);
Swabey89 17:ead43c1b729d 42 EventQueue serialqueue(32*EVENTS_EVENT_SIZE);
Swabey89 1:31c7b4ab552b 43
Swabey89 1:31c7b4ab552b 44 //Threads
Swabey89 19:88d8359306a4 45 Thread producer_thread(osPriorityHigh);
Swabey89 19:88d8359306a4 46 Thread consumer_thread;
Swabey89 19:88d8359306a4 47 Thread serial_thread(osPriorityAboveNormal);
Swabey89 24:81981815ef20 48 Thread SDqueue_thread; //remove
Swabey89 11:3ad0327e8c9f 49 Thread LCDqueue_thread;
Swabey89 20:cdde0663c481 50 Thread Network_thread;
Swabey89 0:4afd4940a189 51
Swabey89 24:81981815ef20 52 //TEST FOR SD CARD
Swabey89 24:81981815ef20 53 Thread SDmount_thread;
Swabey89 24:81981815ef20 54
Swabey89 17:ead43c1b729d 55 //Timers
Swabey89 8:c81b0ff8b822 56 Ticker sample;
Swabey89 10:0fffc988d325 57
Swabey89 17:ead43c1b729d 58 //Function prototypes
Swabey89 8:c81b0ff8b822 59 void sampleISR(void);
Swabey89 19:88d8359306a4 60 void sampleProducer(void);
Swabey89 19:88d8359306a4 61 void sampleConsumer(void);
Swabey89 11:3ad0327e8c9f 62 void serialISR(void);
Swabey89 19:88d8359306a4 63 void serialData(void);
Swabey89 11:3ad0327e8c9f 64
Swabey89 24:81981815ef20 65
Swabey89 24:81981815ef20 66
Swabey89 24:81981815ef20 67 //TEST FOR SD CARD MOUNT AND UNMOUNT
Swabey89 24:81981815ef20 68 Timeout userswTimeOut;
Swabey89 24:81981815ef20 69 int userswState = EDGE_FALLEN;
Swabey89 24:81981815ef20 70 InterruptIn usersw(USER_BUTTON);
Swabey89 24:81981815ef20 71 void userswTimeOutHandler();
Swabey89 24:81981815ef20 72 void userswRisingEdge();
Swabey89 24:81981815ef20 73 void userswFallingEdge();
Swabey89 24:81981815ef20 74 void SDmount();
Swabey89 24:81981815ef20 75
Swabey89 24:81981815ef20 76
Swabey89 24:81981815ef20 77
Swabey89 15:8af9672a6778 78 int main() {
Swabey89 17:ead43c1b729d 79 timeData = new tm;
Swabey89 11:3ad0327e8c9f 80 pc = new RawSerial(USBTX, USBRX);
Swabey89 8:c81b0ff8b822 81
Swabey89 18:3edfb9152b05 82 //Initialisations
Swabey89 17:ead43c1b729d 83 SDcard();
Swabey89 9:fa8a35d9d6c0 84
Swabey89 1:31c7b4ab552b 85 //Power on self test
Swabey89 1:31c7b4ab552b 86 post();
Swabey89 18:3edfb9152b05 87
Swabey89 18:3edfb9152b05 88 //Start threads
Swabey89 18:3edfb9152b05 89 SDqueue_thread.start(callback(&SDqueue, &EventQueue::dispatch_forever));
Swabey89 18:3edfb9152b05 90 LCDqueue_thread.start(callback(&LCDqueue, &EventQueue::dispatch_forever));
Swabey89 19:88d8359306a4 91 serial_thread.start(callback(&serialqueue, &EventQueue::dispatch_forever));
Swabey89 21:2c438eeaab14 92 Network_thread.start(network);
Swabey89 19:88d8359306a4 93 producer_thread.start(sampleProducer);
Swabey89 19:88d8359306a4 94 consumer_thread.start(sampleConsumer);
Swabey89 3:b1583f309b43 95
Swabey89 24:81981815ef20 96 //TEST FOR SD CARD
Swabey89 24:81981815ef20 97 SDmount_thread.start(SDmount);
Swabey89 24:81981815ef20 98
Swabey89 20:cdde0663c481 99
Swabey89 18:3edfb9152b05 100 //Attach ISRs
Swabey89 18:3edfb9152b05 101 sample.attach(&sampleISR, sample_rate);
Swabey89 11:3ad0327e8c9f 102 pc->attach(serialISR, Serial::RxIrq);
Swabey89 15:8af9672a6778 103
Swabey89 24:81981815ef20 104 //TEST FOR SD CARD MOUNT AND UNMOUNT
Swabey89 24:81981815ef20 105 usersw.rise(&userswRisingEdge);
Swabey89 24:81981815ef20 106
Swabey89 1:31c7b4ab552b 107 //Flash to indicate goodness
Swabey89 1:31c7b4ab552b 108 while(true) {
Swabey89 5:956984cbe447 109 greenLED = !greenLED;
Swabey89 5:956984cbe447 110 Thread::wait(500);
Swabey89 0:4afd4940a189 111 }
Swabey89 0:4afd4940a189 112 }
Swabey89 1:31c7b4ab552b 113
Swabey89 19:88d8359306a4 114 /*
Swabey89 19:88d8359306a4 115 FUNCITONS BELOW NEED MOVING?
Swabey89 19:88d8359306a4 116 */
Swabey89 19:88d8359306a4 117
Swabey89 8:c81b0ff8b822 118 void sampleISR()
Swabey89 8:c81b0ff8b822 119 {
Swabey89 19:88d8359306a4 120 producer_thread.signal_set(TAKE_SAMPLE);
Swabey89 8:c81b0ff8b822 121 }
Swabey89 1:31c7b4ab552b 122
Swabey89 11:3ad0327e8c9f 123 void serialISR()
Swabey89 11:3ad0327e8c9f 124 {
Swabey89 11:3ad0327e8c9f 125 pc->attach(NULL, Serial::RxIrq);
Swabey89 19:88d8359306a4 126 serialqueue.call(serialData);
Swabey89 11:3ad0327e8c9f 127 }
Swabey89 1:31c7b4ab552b 128
Swabey89 19:88d8359306a4 129 void serialData()
Swabey89 12:3a54cbaa714c 130 {
Swabey89 17:ead43c1b729d 131 static int i = 0;
Swabey89 11:3ad0327e8c9f 132 if (pc->readable())
Swabey89 11:3ad0327e8c9f 133 {
Swabey89 18:3edfb9152b05 134 cmdBuffer[i] = pc->getc();
Swabey89 18:3edfb9152b05 135 if (cmdBuffer[i] == '\r')
Swabey89 11:3ad0327e8c9f 136 {
Swabey89 11:3ad0327e8c9f 137 i = 0;
Swabey89 18:3edfb9152b05 138 serialqueue.call(serialterm);
Swabey89 11:3ad0327e8c9f 139 }
Swabey89 11:3ad0327e8c9f 140 else i++;
Swabey89 11:3ad0327e8c9f 141 }
Swabey89 11:3ad0327e8c9f 142 pc->attach(serialISR, Serial::RxIrq);
Swabey89 11:3ad0327e8c9f 143 }
Swabey89 19:88d8359306a4 144
Swabey89 19:88d8359306a4 145
Swabey89 19:88d8359306a4 146 void sampleProducer()
Swabey89 19:88d8359306a4 147 {
Swabey89 19:88d8359306a4 148 while(true)
Swabey89 19:88d8359306a4 149 {
Swabey89 19:88d8359306a4 150 //High priority thread
Swabey89 19:88d8359306a4 151 Thread::signal_wait(TAKE_SAMPLE);
Swabey89 19:88d8359306a4 152
Swabey89 19:88d8359306a4 153 //int32_t Nspaces = spaceAvailable.wait(); //Blocking if space is not available //Dont check if there is space available becuase we are overwriting
Swabey89 19:88d8359306a4 154 bufferLock.lock();
Swabey89 19:88d8359306a4 155 //Update buffer
Swabey89 19:88d8359306a4 156 newestIndex = (newestIndex+1) % BUFFERSIZE; //CIRCULAR
Swabey89 19:88d8359306a4 157 buffer[newestIndex].updatetemp(sensor.getTemperature());
Swabey89 19:88d8359306a4 158 buffer[newestIndex].updatepress(sensor.getPressure());
Swabey89 19:88d8359306a4 159 buffer[newestIndex].updatelight(adcIn.read());
Swabey89 21:2c438eeaab14 160 buffer[newestIndex].updateTime();
Swabey89 21:2c438eeaab14 161
Swabey89 19:88d8359306a4 162 //bufferLock.unlock(); //normally here, moved due to updating queues.
Swabey89 19:88d8359306a4 163 samplesInBuffer.release();
Swabey89 19:88d8359306a4 164
Swabey89 19:88d8359306a4 165 //Pass onto queues
Swabey89 19:88d8359306a4 166 LCDqueue.call(LCD_display, buffer[newestIndex].gettemp(),buffer[newestIndex].getpress(),buffer[newestIndex].getlight());
Swabey89 19:88d8359306a4 167 bufferLock.unlock();
Swabey89 19:88d8359306a4 168
Swabey89 19:88d8359306a4 169 //Write to the SD card when i have 120 samples in the buffer
Swabey89 19:88d8359306a4 170 if (newestIndex == 119)
Swabey89 19:88d8359306a4 171 {
Swabey89 19:88d8359306a4 172 //save to SD card
Swabey89 19:88d8359306a4 173 consumer_thread.signal_set(STORE_DATA);
Swabey89 19:88d8359306a4 174
Swabey89 19:88d8359306a4 175 }
Swabey89 19:88d8359306a4 176
Swabey89 19:88d8359306a4 177 //pc->printf("%d\r\n", newestIndex);
Swabey89 19:88d8359306a4 178
Swabey89 19:88d8359306a4 179 }
Swabey89 19:88d8359306a4 180 }
Swabey89 19:88d8359306a4 181
Swabey89 19:88d8359306a4 182 void sampleConsumer()
Swabey89 19:88d8359306a4 183 {
Swabey89 19:88d8359306a4 184 while(true)
Swabey89 19:88d8359306a4 185 {
Swabey89 19:88d8359306a4 186
Swabey89 19:88d8359306a4 187 static time_t seconds;
Swabey89 19:88d8359306a4 188
Swabey89 19:88d8359306a4 189 //write to the SD card from 0 up to newestIndex.
Swabey89 19:88d8359306a4 190 Thread::signal_wait(STORE_DATA);
Swabey89 19:88d8359306a4 191 bufferLock.lock();
Swabey89 19:88d8359306a4 192 redLED = 1;
Swabey89 19:88d8359306a4 193
Swabey89 23:f87fe0c55894 194 //DO THIS IF THE SD CARD IS INITIALISED
Swabey89 23:f87fe0c55894 195
Swabey89 19:88d8359306a4 196 char fileDate[30];
Swabey89 19:88d8359306a4 197 seconds = time(NULL);
Swabey89 19:88d8359306a4 198 timeData = localtime(&seconds);
Swabey89 19:88d8359306a4 199 set_time(mktime(timeData));
Swabey89 23:f87fe0c55894 200 strftime(fileDate, 30, "sd/log_%d_%m_%y.csv", timeData);
Swabey89 19:88d8359306a4 201
Swabey89 19:88d8359306a4 202 fp = fopen(fileDate,"a");
Swabey89 23:f87fe0c55894 203 if (fp == NULL)
Swabey89 23:f87fe0c55894 204 {
Swabey89 23:f87fe0c55894 205 pc->printf("WARNING: SD card could not be updated\n\r");
Swabey89 19:88d8359306a4 206 }
Swabey89 23:f87fe0c55894 207 else
Swabey89 23:f87fe0c55894 208 {
Swabey89 23:f87fe0c55894 209 for (int i = 0; i<BUFFERSIZE; i++)
Swabey89 23:f87fe0c55894 210 {
Swabey89 23:f87fe0c55894 211 fprintf(fp,"%s,%5.2f,%5.2f,%5.2f\n\r", buffer[i].getTime(), buffer[i].gettemp(), buffer[i].getpress(), buffer[i].getlight());
Swabey89 23:f87fe0c55894 212 }
Swabey89 23:f87fe0c55894 213 printf("SD card updated\r\n");
Swabey89 23:f87fe0c55894 214 }
Swabey89 19:88d8359306a4 215 fclose(fp);
Swabey89 19:88d8359306a4 216 redLED = 0;
Swabey89 23:f87fe0c55894 217 bufferLock.unlock();
Swabey89 19:88d8359306a4 218 }
Swabey89 19:88d8359306a4 219 }
Swabey89 24:81981815ef20 220
Swabey89 24:81981815ef20 221 //TEST FOR MOUNTING AND UNMOUNTING SD CARD
Swabey89 24:81981815ef20 222 //Interrupt service routine for handling the timeout
Swabey89 24:81981815ef20 223
Swabey89 24:81981815ef20 224
Swabey89 24:81981815ef20 225 void userswTimeOutHandler() {
Swabey89 24:81981815ef20 226 userswTimeOut.detach(); //Stop the timeout counter firing
Swabey89 24:81981815ef20 227
Swabey89 24:81981815ef20 228 //Which event does this follow?
Swabey89 24:81981815ef20 229 switch (userswState) {
Swabey89 24:81981815ef20 230 case EDGE_RISEN:
Swabey89 24:81981815ef20 231 usersw.fall(&userswFallingEdge); //Now wait for a falling edge
Swabey89 24:81981815ef20 232 break;
Swabey89 24:81981815ef20 233 case EDGE_FALLEN:
Swabey89 24:81981815ef20 234 usersw.rise(&userswRisingEdge); //Now wait for a rising edge
Swabey89 24:81981815ef20 235 break;
Swabey89 24:81981815ef20 236 } //end switch
Swabey89 24:81981815ef20 237 }
Swabey89 24:81981815ef20 238
Swabey89 24:81981815ef20 239 //Interrupt service routine for a rising edge (press)
Swabey89 24:81981815ef20 240 void userswRisingEdge() {
Swabey89 24:81981815ef20 241 usersw.rise(NULL); //Disable detecting more rising edges
Swabey89 24:81981815ef20 242 userswState = EDGE_RISEN; //Flag state
Swabey89 24:81981815ef20 243 userswTimeOut.attach(&userswTimeOutHandler, 0.2); //Start timeout timer
Swabey89 24:81981815ef20 244 }
Swabey89 24:81981815ef20 245
Swabey89 24:81981815ef20 246 //Interrupt service routive for SW1 falling edge (release)
Swabey89 24:81981815ef20 247 void userswFallingEdge() {
Swabey89 24:81981815ef20 248 usersw.fall(NULL); //Disable this interrupt
Swabey89 24:81981815ef20 249 SDmount_thread.signal_set(SIGNAL_SD);
Swabey89 24:81981815ef20 250 userswState = EDGE_FALLEN; //Flag state
Swabey89 24:81981815ef20 251 userswTimeOut.attach(&userswTimeOutHandler, 0.2); //Start timeout counter - may want to increase this
Swabey89 24:81981815ef20 252 }