File content as of revision 0:8ab239852e4b:

#include "mbed.h"

I2C i2c(p9, p10);        // sda, scl
DigitalIn orientationInt(p5);
Serial pc(USBTX, USBRX); // tx, rx

// define the I2C register address
const int XOUT = 0x00;
const int YOUT = 0x01;
const int ZOUT = 0x02;
const int TILS = 0x03;
const int SRST = 0x04;
const int SPCNT = 0x05;
const int INTSU = 0x06;
const int MODE = 0x07;
const int SR = 0x08;
const int PDET = 0x09;
const int PD = 0x0A;

void configMMA7760() {
    char cmd[2];
    
    cmd[0] = 0x00; i2c.write(MODE, cmd, 1); // Standby Mode
    cmd[0] = 0x00; i2c.write(SPCNT, cmd, 1); // No sleep count
    cmd[0] = 0x03; i2c.write(INTSU, cmd, 1); // Configure GINT Interrupt
    cmd[0] = 0xE0; i2c.write(PDET, cmd, 1); // No tap detection enabled
    cmd[0] = 0x34; i2c.write(SR, cmd, 1); // 8 samples/s, TILT debounce filter = 2
    cmd[0] = 0x00; i2c.write(PD, cmd, 1); // No tap detection debounce count enabled
    cmd[0] = 0x41; i2c.write(MODE, cmd, 1); // Active Mode, INT = push-pull and active low
}

int main() {
    char cmd[2];
    
    configureMMA7760();
    while (1) {
        if (!orientationInt) {
            continue;
            wait(0.1);
        }
        
        i2c.read(TILT, cmd, 1);
        int PoLa = (cmd[0] >> 2) & 0x07;
        int BaFro = cmd[0] & 0x03;
        
        switch (PoLa) {
        case 1: pc.printf("Left\n");
        case 2: pc.printf("Right\n");
        case 5: pc.printf("Down\n");
        case 6: pc.printf("Up\n");
        }
        
        switch (BaFro) {
        case 1: pc.printf("Front\n");
        case 2: pc.printf("Back\n");
        }
        wait(0.1);
    }
}