Led tilts
Dependencies: MMA8451Q SLCD mbed
Diff: main.cpp
- Revision:
- 0:35242770842b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Sep 29 17:28:18 2014 +0000 @@ -0,0 +1,77 @@ +#include "mbed.h" +#include "MMA8451Q.h" +#include "SLCD.h" + +/* +Test of the accelerometer, digital I/O, on-board LCD screen. + Looing at vector product of the x-y components of the accelerometer. + Works pretty well. Still rough, program wise - sc 140710 + */ + +#define DATATIME 0.200 + +#define PROGNAME "ACCLCD341\r/n" + +#define PRINTDBUG +// +#if defined (TARGET_KL25Z) || defined (TARGET_KL46Z) + PinName const SDA = PTE25; // Data pins for the accelerometer/magnetometer. + PinName const SCL = PTE24; // DO NOT CHANGE +#elif defined (TARGET_KL05Z) + PinName const SDA = PTB4; + PinName const SCL = PTB3; +#else + #error TARGET NOT DEFINED +#endif + +#define MMA8451_I2C_ADDRESS (0x1d<<1) + +SLCD slcd; //define LCD display + +MMA8451Q Acc(SDA, SCL, MMA8451_I2C_ADDRESS); +Serial pc(USBTX, USBRX); + +float sqrt_newt(float argument) { + return (sqrt(argument)); +} + + +void LCDMess(char *lMess, float dWait){ + slcd.Home(); + slcd.clear(); + slcd.printf(lMess); + wait(dWait); +} + + +int main() { + float xAcc; + float yAcc; + float vector; + char lcdData[10]; //buffer needs places dor decimal pt and colon + +#ifdef PRINTDBUG + pc.printf(PROGNAME); +#endif +// main loop forever + while(true) { + +//Get accelerometer data - tilt angles minus offset for zero mark. + xAcc = abs(acc.getAccX()); + yAcc = abs(acc.getAccY()); + // Calulate vector sum of x and y reading. + vector = sqrt_newt(pow(xAcc,2) + pow(yAcc,2)); + + +#ifdef PRINTDBUG + pc.printf("xAcc = %f\r\n", xAcc); + pc.printf("yAcc = %f\r\n", yAcc); + pc.printf("vector = %f\r\n", vector); +#endif + + sprintf (lcdData,"%4.3f",vector); + LCDMess(lcdData, DATATIME); +// Wait then do the whole thing again. + wait(DATATIME); + } +} \ No newline at end of file