main.cpp

00001 #include"mbed.h"
00002 
00003 #define ADXL345_I2C_READ        0xA7
00004 #define ADXL345_I2C_WRITE       0xA6
00005 #define ADXL345_I2C_ADDRESS     0x53
00006 #define ADXL345_DEVID_REG       0x00
00007 #define ADXL345_DATAX0_REG      0x32
00008 #define ADXL345_POWER_CTL_REG   0x2D
00009 #define MeasurementMode         0x08
00010 
00011 I2C adxl345(PA_10,PA_09);
00012 Serial uart0(PA_13,PA_14);
00013 //DigitalOut led(LED1);
00014 int16_t xyz[3] = {0, 0, 0};
00015 
00016 int main() {
00017     char config[2];
00018     char data[6];
00019     config[0] = ADXL345_DEVID_REG;
00020     char output;
00021     uart0.baud(9600);
00022     adxl345.write( ADXL345_I2C_WRITE , config, 1);
00023     adxl345.read( ADXL345_I2C_READ , &output, 1);
00024     uart0.printf("ADXL345 device id is 0x%x.\r\n",output);
00025     config[0] = ADXL345_POWER_CTL_REG;
00026     config[1] = MeasurementMode;
00027     adxl345.write( ADXL345_I2C_WRITE, config, 2); //set power
00028 
00029     config[0]=ADXL345_DATAX0_REG;
00030     while (1)
00031     {
00032         adxl345.write( ADXL345_I2C_WRITE, config, 1);
00033         adxl345.read( ADXL345_I2C_READ , data, 6);
00034         xyz[0]=(int)data[1]<<8|(int)data[0];
00035         xyz[1]=(int)data[3]<<8|(int)data[2];
00036         xyz[2]=(int)data[5]<<8|(int)data[4];
00037         uart0.printf("%6i, %6i, %6i\n", xyz[0], xyz[1], xyz[2]);
00038         wait(0.1);
00039     }
00040 }