![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
my coursework
Dependencies: CheckRTC LPS25H hts221
Fork of ELEC350-extended-referral1 by
main.cpp
- Committer:
- spanesar
- Date:
- 2017-11-23
- Revision:
- 48:614f8821ccca
- Parent:
- 47:12f18a4527d8
- Child:
- 49:a39eacfcd968
File content as of revision 48:614f8821ccca:
#include "mbed.h" #include "rtos.h" #include "hts221.h" #include "LPS25H.h" #include <sstream> #define READALL_OFF 1 #define SETTIME_OFF 2 #define SETT_OFF 4 #define READ_OFF 7 #define ALL_OFF 9 DigitalOut myled(LED1); I2C i2c2(I2C_SDA, I2C_SCL); Serial pc(USBTX, USBRX); float tempCelsius = 25.50; float humi = 55; int humiMax = 100; char buffer_str=0; uint32_t seconds = 0, minutes=0, hours=0; Ticker t; volatile static unsigned short sample16 = 0; void doSample1Hz(); int count = 0; char *buf; size_t sz; int oldest; typedef struct { float temp; float press; float humid; } measurement; measurement buffer[120]; LPS25H barometer(i2c2, LPS25H_V_CHIP_ADDR); HTS221 humidity(I2C_SDA, I2C_SCL); void function1(); Thread t1; Thread tSample; osThreadId idMain; osThreadId id1; osThreadId id2; osThreadId id3; osThreadId id4; Ticker ticker; void function1() { //begin function while (true) {//begin while true char strbuffer [128]; scanf("%127s", strbuffer); string buffer_str(strbuffer); char date [32]; strftime(date, 32, "%Y/%m/%d %a", localtime(&seconds)); char time [32]; strftime(time, 32, "%H:%M:%S %p", localtime(&seconds)); if(buffer_str=="READALL") {//begin if buffer readall // displays all the variables of time, date, temperature, humidity and all the barometric readings to the serial for (int i = 0; i <120; i++) { //printf("%s, %s, %4.2fC , %3.1f%%, %6.1f, %4.1f\n\r", time, date, tempCelsius, humi, buffer[i].humid, buffer[i].press, buffer[i].temp, barometer.temperature()); //measurement test=buffer[i]; printf("%f %f %f \n\r",buffer[i].humid, buffer[i].press, buffer[i].temp); } myled = 1; // LED is ON Thread::wait(200); // 200 ms NB 'Thread::wait(int d);' !!! d is in milliseconds! myled = 0; // LED is OFF }//end if buffer readall if(buffer_str=="SETTIME") {// begin if buffer settime set_time(1508268288); //sets time in UTC printf("time and date updated to %s %s\n\r", time, date); //prints date and time myled = 1; //led on Thread::wait(200); // wait 200ms myled = 0; //led off }//end if buffer settime if(buffer_str=="SETT") { // begin if buffer sett for (count = 0; count < 5; count++) { float temp = barometer.temperature(); float pressure = barometer.pressure(); sz = snprintf(NULL, 0,"%s, %s, %4.2fC , %3.1f%%, %6.1f, %4.1f\n\r", time, date, tempCelsius, humi, pressure, temp); buf = (char *)malloc(sz + 1); snprintf(buf, sz + 1, "%s, %s, %4.2fC , %3.1f%%, %6.1f, %4.1f\n\r", time, date, tempCelsius, humi, pressure, temp); printf("%s\n\r",buf); free(buf); printf("written to memory\n\r"); myled = 1; Thread::wait(200); myled = 0; } //end if buffer sett } if(buffer_str=="READ") { //begin if buffer read printf("%s\n\r", buf); myled = 1; Thread::wait(200); myled = 0; }//end if buffer read }//end while true }//end function void getSampleThread() { while (true) { Thread::signal_wait(99); //Get samples measurement m; float pressure = barometer.pressure(); m.press = pressure; float temp; float humidityval; humidity.ReadTempHumi(&temp, &humidityval); // reads temperature and humity levels m.humid = humidityval; m.temp = temp; buffer[oldest] = m; //update oldest oldest++; //wrap back to zero if at the end if (oldest>120) { oldest = 0; } //TO DO } } void getSample() { tSample.signal_set(99); } int main() { time_t seconds = time(NULL); pc.baud(9600); //sets baud rate to 9600 ticker.attach(getSample, 15); tSample.start(getSampleThread); idMain = osThreadGetId(); t1.start(function1); id1 = t1.gettid(); humidity.init(); humidity.calib(); printf("Type SETTIME to set time and date [enter] \n\r"); printf("Type SETT to start sampling [ENTER]\n\r"); printf("Type DELETEALL to delete sensor data [enter]\n\r"); printf("Type READALL [enter]\n\r"); printf("Type READ to read sensor data in memory [ENTER]\n\r"); while(1) { char buffer [128]; scanf("%127s", buffer); string buffer_str(buffer); osSignalWait(ALL_OFF,osWaitForever); } }