Shahariar Hossain
https://www.hackster.io/projects/bfb38d
Dependencies: mbed MMA8652 TextLCD MAG3110
Revision 3:2cc1ff874a75, committed 2019-04-17
- Comitter:
- suntopbd
- Date:
- Wed Apr 17 04:28:33 2019 +0000
- Parent:
- 2:ad0b044d0a10
- Commit message:
- using microbit on board sensors
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MAG3110.lib Wed Apr 17 04:28:33 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/suntopbd/code/MAG3110/#f246f14f8bd2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MMA8652.lib Wed Apr 17 04:28:33 2019 +0000 @@ -0,0 +1,1 @@ +http://os.mbed.com/users/JimCarver/code/MMA8652/#a0a918f9091b
--- a/TextLCD.lib Sat Dec 04 11:31:07 2010 +0000 +++ b/TextLCD.lib Wed Apr 17 04:28:33 2019 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/simon/code/TextLCD/#e4cb7ddee0d3 +https://os.mbed.com/users/simon/code/TextLCD/#308d188a2d3a
--- a/main.cpp Sat Dec 04 11:31:07 2010 +0000
+++ b/main.cpp Wed Apr 17 04:28:33 2019 +0000
@@ -1,10 +1,222 @@
-// Hello World! for the TextLCD
#include "mbed.h"
#include "TextLCD.h"
+#include "MAG3110.h"
+#include "MMA8652.h"
-TextLCD lcd(p15, p16, p17, p18, p19, p20); // rs, e, d4-d7
+MAG3110 mag(P20, P19); // i2c pins SDA, SCL for magnetometer //
+MMA8652 acc(P20, P19); // i2c pins SDA, SCL for accelerometer //
+// LCD pins rs, en, d4, d5, d6, d7 and 16x2 lcd //
+TextLCD lcd(P6, P8, P7, P13, P14, P15,TextLCD::LCD16x2);
+
+PwmOut ChargePump(P0); // pwm output to drive charge pump
+InterruptIn ButtonA(P5); // active low push switch with interrupt
+InterruptIn ButtonB(P11); // active low push switch with interrupt
+
+AnalogIn Vref_2v5(P3); // 2.5v ref on adc for vcc independent measurement
+AnalogIn ADCP4 (P4);
+AnalogIn ADCP10 (P10);
+
+float frequency = 9000.0f; // min 1.5 kHz for stable operation
+float duty = 50.0f; // min 20% to max 80 percent for stable operation
+float heading = 0.0; // magnetometer heading
+float Xg =0.0; float Yg = 0.0; float Zg = 0.0;
+uint16_t vref =0;
+volatile int selector = 1;
-int main() {
- lcd.printf("Hello World!\n");
+////////////////////////////////////////////////////////////////////////////////
+void EnableChargePump (void)
+{
+// 10kHz drive signal for Diode-Capacitor DC-DC (3.3V ->5.5V) converter
+ ChargePump.period(1.0f/frequency);
+ ChargePump.write(duty/100.0f); // 50% duty
+ wait(.5); // Let boosted voltage stabilize to 5.5v (lcd supply as load)
+}
+////////////////////////////////////////////////////////////////////////////////
+void calMag(void)
+{
+ //magnetometer calibration: finding max and min of X, Y axis
+ int tempXmax, tempXmin, tempYmax, tempYmin, newX, newY;
+ while(selector==1)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Press A to Start");
+ lcd.locate(0,1);
+ lcd.printf("Mag Calibration");
+ wait(.3);
+ }
+ selector=1;
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Calibration is");
+ lcd.locate(0,1);
+ lcd.printf("Starting Now..");
+ wait(2);
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Rotate like an");
+ lcd.locate(0,1);
+ lcd.printf("Infinity Symbol");
+ wait(3);
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Calibrating now");
+ lcd.locate(0,1);
+ lcd.printf("Keep swinging..");
+ tempXmax = tempXmin = mag.readVal(MAG_OUT_X_MSB);
+ tempYmax = tempYmin = mag.readVal(MAG_OUT_Y_MSB);
+ int sample = 0;
+
+ while(sample<201) {
+ wait(0.05);
+ newX = mag.readVal(MAG_OUT_X_MSB);
+ newY = mag.readVal(MAG_OUT_Y_MSB);
+ if (newX > tempXmax) tempXmax = newX;
+ if (newX < tempXmin) tempXmin = newX;
+ if (newY > tempYmax) tempYmax = newY;
+ if (newY < tempYmin) tempYmin = newY;
+ sample++;
+ }
+
+ mag.setCalibration( tempXmin, tempXmax, tempYmin, tempYmax );
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Calibration has");
+ lcd.locate(0,1);
+ lcd.printf("been completed");
+}
+////////////////////////////////////////////////////////////////////////////////
+void getMagHeading(void)
+{
+ heading = mag.getHeading();; // magnetometer heading
+ wait(.1);
+}
+////////////////////////////////////////////////////////////////////////////////
+void getAccXYZ(void)
+{
+ float temp[3];
+ acc.ReadXYZ(temp); // accelerometer
+ Xg = 10.0*temp[0]; Yg = 10.0*temp[1]; Zg = 10.0*temp[2];
+ wait(.1);
+}
+////////////////////////////////////////////////////////////////////////////////
+void WhenAPressed()
+{
+ // button A ISR
+ if (selector<8)
+ selector++;
+ if(selector>=8)
+ selector=8;
+ wait(.2);
+}
+////////////////////////////////////////////////////////////////////////////////
+void WhenBPressed()
+{
+ // button B ISR
+ if (selector>1)
+ selector--;
+ if(selector<=1)
+ selector=1;
+ wait(.2);
}
+////////////////////////////////////////////////////////////////////////////////
+void updateLCD (void)
+{
+ lcd.cls();
+
+
+ if(selector==1)
+ {
+ lcd.locate(0,0);
+ lcd.printf("System Voltage");
+ lcd.locate(0,1);
+ lcd.printf("Vcc:%fVolt", ((2.5*1023.0)/Vref_2v5.read_u16()));
+ }
+
+ if(selector==2)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Charge Pump");
+ lcd.locate(0,1);
+ lcd.printf("Freq:%dkHz Cyc:%d%",int(frequency/1000.0f),int(duty));
+ }
+
+ if(selector==3)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Reading ADC val");
+ lcd.locate(0,1);
+ lcd.printf("ADC P4:%d", (ADCP4.read_u16()));
+ }
+
+ if(selector==4)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Reading ADC data");
+ lcd.locate(0,1);
+ lcd.printf("ADC P10:%d", (ADCP10.read_u16()));
+ }
+
+ if(selector==5)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Mag Sensor data");
+ lcd.locate(0,1);
+ lcd.printf("Mag Heading:%d", int(heading));
+ }
+
+ if(selector==6)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Acc Sensor Xaxis");
+ lcd.locate(0,1);
+ lcd.printf("Xg:%f", Xg);
+ }
+
+ if(selector==7)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Acc Sensor Yaxis");
+ lcd.locate(0,1);
+ lcd.printf("Yg:%f", Yg);
+ }
+
+ if(selector==8)
+ {
+ lcd.locate(0,0);
+ lcd.printf("Acc Sensor Zaxis");
+ lcd.locate(0,1);
+ lcd.printf("Zg:%f", Zg);
+ }
+ wait(.1);
+}
+////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////// main ////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+int main()
+{
+ EnableChargePump(); // enable lcd power
+ ButtonA.fall(&WhenAPressed); // enable falling edge interrupt on button A
+ ButtonB.fall(&WhenBPressed); // enable falling edge interrupt on button B
+ calMag(); // init magnetometer and calibrate
+ acc.begin(); // init accelerometer
+
+ lcd.locate(0,0);
+ lcd.printf("Press A or B to");
+ lcd.locate(0,1);
+ lcd.printf("check sensor info");
+ wait(2);
+ ////////////////////// while ////////////////
+
+ while(1)
+ {
+ updateLCD();
+ getMagHeading();
+ getAccXYZ();
+
+ } ///// end of while .....
+
+} ///// end of main ......
+
+//////////////////////////////// end of code ///////////////////////////////////
--- a/mbed.bld Sat Dec 04 11:31:07 2010 +0000 +++ b/mbed.bld Wed Apr 17 04:28:33 2019 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file