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LPC1768 + adxl345 accelerometer

Reza Ghochkhani

Dear friend,

I need to communicate with adxl345 accelerometer using LPC1768's 4 wire spi interface.
does anybody have a library for this purpose? (I need to enable activity and inactivity interrupts)

If not has anyone ever worked with this module? How am I supposed to write a value to a special register of the module?

yours sincerely

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    I worked with that device with i2c interface. You need to select register you wish to read/write and send parameter that is expected.

    e.g.

    #define ADXL345_ADDR 0x1D
#define DEVICE_ID 0x00
uint8_t deviceId = i2c_read(ADXL345_ADDR, DEVICE_ID);

    Command like device id, just need to read 1 byte from register with address 0x00.

    To read X value from sensor, you need to read two registers.

    #define OUT_X_L 0x32
#define OUT_X_H 0x33

uint16_t xVal = i2c_read(ADXL345_ADDR, OUT_X_L) | (i2c_read(ADXL345_ADDR, OUT_X_H)<<8))

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  • 0

    I worked with that device with i2c interface. You need to select register you wish to read/write and send parameter that is expected.

    e.g.

    #define ADXL345_ADDR 0x1D
#define DEVICE_ID 0x00
uint8_t deviceId = i2c_read(ADXL345_ADDR, DEVICE_ID);

    Command like device id, just need to read 1 byte from register with address 0x00.

    To read X value from sensor, you need to read two registers.

    #define OUT_X_L 0x32
#define OUT_X_H 0x33

uint16_t xVal = i2c_read(ADXL345_ADDR, OUT_X_L) | (i2c_read(ADXL345_ADDR, OUT_X_H)<<8))

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