![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Test midterm publish
Dependencies: MMA8451Q SLCD mbed
Fork of ACC_LCD_341_MID by
acc_341.cpp
- Committer:
- bomalley
- Date:
- 2014-09-28
- Revision:
- 3:c31fe28c4673
- Parent:
- 2:6003ed409def
File content as of revision 3:c31fe28c4673:
#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 0.150 #define PROGNAME "ACCLCD341bom" #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); } }