Diff: main.cpp

Revision:

0:5790cb887b41

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Mar 01 16:01:59 2021 +0000
@@ -0,0 +1,59 @@
+#include "mbed.h"
+#include <ADXL345.h> 
+
+class XYZ{ 
+        public:
+        float x;
+        float y;
+        float z;
+        
+        void normalise(int* raw_data){ 
+                x = float(int16_t(raw_data[0]))*4/1000; 
+                y = float(int16_t(raw_data[1]))*4/1000; 
+                z = float(int16_t(raw_data[2]))*4/1000; 
+            }
+    };
+
+ADXL345 adxl345(D11, D12, D13, D10); 
+InterruptIn externalInterrupt(D15); 
+Serial pc(USBTX, USBRX); 
+DigitalOut RedLed(D6); 
+DigitalOut GreenLed(D5); 
+Ticker tick; 
+int data[3];  
+XYZ acc; 
+
+void freeFallDetect(){
+        RedLed = 1;
+        wait(0.1);
+        RedLed = 0; 
+        pc.printf("Free fall detected\r\n"); 
+        adxl345.getInterruptSource(); 
+        return;
+    }
+    
+void fetchData(){ 
+        GreenLed = !GreenLed; 
+        adxl345.getOutput(data); 
+        acc.normalise(data);
+        pc.printf("--X = %fg, Y = %fg, Z = %fg--\r\n", acc.x, acc.y, acc.z);
+        return;
+    }
+
+int main(){
+    
+    adxl345.setPowerControl(0x08); 
+    adxl345.setDataFormatControl(0x08); 
+    adxl345.setInterruptMappingControl(0xFB);
+    adxl345.setFreefallThreshold(0x09);
+    adxl345.setFreefallTime(25); 
+    adxl345.setInterruptEnableControl(0x04);
+    adxl345.getInterruptSource();
+    
+    externalInterrupt.rise(&freeFallDetect); 
+    tick.attach(&fetchData, 0.2); 
+
+    while (true) {
+        __WFI(); 
+    }
+}