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@@ -3,100 +3,140 @@ |
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#include <stdint.h> |
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#include <wiringPi.h> |
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#include <wiringPiI2C.h> |
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#include <errno.h> |
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//Preset information about MPU3050 (gyro sensor) |
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#define MPU3050_PWR (0x6b) |
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#define MPU3050_I2C (0x69) |
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#define MPU3050_REG (0x21) |
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#define LED 0 |
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//Preset buzzer WiringPi port |
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#define BUZZER 0 |
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//Preset button interrupt WiringPi port |
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#define BUTTON 5 |
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//Preset button debounce time |
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#define DEBOUNCE_MS 1000 |
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volatile int trigger; |
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//Declaring all global variables |
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volatile uint8_t trigger; |
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volatile uint8_t photoTaken; |
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volatile unsigned int prevTime = 0; |
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volatile uint8_t btnClicked = 0; |
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void myInterrupt(void) |
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void buttonInterrupt() |
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{ |
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//Get the current time and its difference from last interrupt |
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unsigned int currentTime = millis(); |
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unsigned int deltaTime = currentTime - prevTime; |
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printf("%d\n", deltaTime); |
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//Check if the deltaTime from the last click is longer than the preset debounce time |
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if (deltaTime > DEBOUNCE_MS) |
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{ |
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//Set new values |
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btnClicked = 1; |
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prevTime = currentTime; |
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printf("test\n"); |
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if (trigger == 0) |
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{ |
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photoTaken = 0; |
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//Set trigger and turn off buzzer |
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trigger = 1; |
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digitalWrite(LED, LOW); |
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printf("T R I G G E R R E D\n"); |
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digitalWrite(BUZZER, LOW); |
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} |
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else |
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{ |
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//Reset photoTaken and trigger |
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photoTaken = 0; |
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trigger = 0; |
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digitalWrite(LED, HIGH); |
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//Double short beep to inform rider |
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digitalWrite(BUZZER, HIGH); |
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delay(100); |
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digitalWrite(LED, LOW); |
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digitalWrite(BUZZER, LOW); |
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delay(100); |
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digitalWrite(LED, HIGH); |
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digitalWrite(BUZZER, HIGH); |
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delay(100); |
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digitalWrite(LED, LOW); |
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printf("T R I G G E R R E D A G A I N\n"); |
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digitalWrite(BUZZER, LOW); |
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} |
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} |
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} |
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int main() |
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{ |
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//Initialize photoTaken and trigger |
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photoTaken = 0; |
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trigger = 0; |
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wiringPiSetup(); |
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pinMode(BUTTON, INPUT); |
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pinMode(LED, OUTPUT); |
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int isrSetup = wiringPiISR(BUTTON, INT_EDGE_FALLING, &myInterrupt); |
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pinMode(BUZZER, OUTPUT); |
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//Setup ISR (button) and I2C (gyro sensor) |
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int isrSetup = wiringPiISR(BUTTON, INT_EDGE_FALLING, &buttonInterrupt); |
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int i2cSetup = wiringPiI2CSetup(MPU3050_I2C); |
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//Check if setups are successful |
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if (i2cSetup < 0||isrSetup < 0) |
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{ |
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return 0; |
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} |
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//Power I2C and begin tracking |
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wiringPiI2CWriteReg8(i2cSetup, MPU3050_PWR, 0x01); |
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//Declare 'gyroInput' to be used to contain the input from gyro sensor later |
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int gyroInput; |
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//Initialize 'count' to be used to keep track how many consecutive 0.1 secs had the gyro sensor stayed at 0 |
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int count = 0; |
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while(1) |
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//Double short beep to inform rider |
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digitalWrite(BUZZER, HIGH); |
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delay(100); |
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digitalWrite(BUZZER, LOW); |
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delay(100); |
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digitalWrite(BUZZER, HIGH); |
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delay(100); |
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digitalWrite(BUZZER, LOW); |
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while (1) |
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{ |
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//Get gyro sensor input |
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gyroInput = wiringPiI2CReadReg8(i2cSetup, MPU3050_REG); |
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if(gyroInput == 0) |
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if (gyroInput == 0) |
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{ |
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//Increase count if gyro sensor returns 0 |
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count++; |
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//If the gyro sensor reading stayed at '0' consecutively for over a full second |
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if (count > 10 && trigger == 0 && photoTaken == 0) |
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{ |
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digitalWrite(LED, HIGH); |
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//Set off the buzzer |
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digitalWrite(BUZZER, HIGH); |
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//Allow rider 2 seconds to cancel taking photo and sending email |
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delay(2000); |
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if (!btnClicked) |
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{ |
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/* If rider did not press the button after 2 seconds, send an email asking |
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* for help from emergency contact attaching a photo taken on the spot |
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*/ |
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system("raspistill -v -o photo.jpg && ./sendMail.sh"); |
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photoTaken = 1; |
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} |
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//Reset button clicks |
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btnClicked = 0; |
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} |
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} |
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else |
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{ |
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//Reset counter to 0 |
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count = 0; |
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digitalWrite(LED, LOW); |
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} |
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//Only read value from gyro sensor every 0.1 sec |
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delay(100); |
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} |
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return 0; |
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} |