3-Axis Accelerometer (LIS302DL)

[Gusse]

Hi Haim,

It is OK to put IC vertically and reset acceration/tilt values (HP_FILTER_RESET (23h)).
You have to configure certain parameters if you want to use interrupt. Here are couple of examples from working piece of codes:

Code to init accelerometer:

Accelerometer_Init:

    'Axes
    I2CAddress_3D = $20     'CTRL_REG1
    TEMP = %01000111        'DR=0, PD=1, FS=0, STP=00, Zen=1, Yen=1, Xen=1 (X,Y,Z enable, Output 100Hz)
    gosub I2C_Write_3D      
    '---------------------
    
    'Filters
    I2CAddress_3D = $21     'CTRL_REG2
    TEMP = %00000111        'SIM = 0, BOOT = 0, --,  FDS = 0, HP FF_WU2 = 0, HP FF_WU1 = 1, HP coeff2 = 1, HP coeff1 = 1 (HP 0.25Hz for FF_WU1)
    gosub I2C_Write_3D
    
    '---------------------
    
    'Interrupts
    I2CAddress_3D = $22     'CTRL_REG3
    TEMP = %00000001        'IHL = 0, PP_OD = 0, I2CFG2-0 = 000, I1CFG2-0 = 001 (FF_WU 1 = INT1)
    gosub I2C_Write_3D
    
    '---------------------
    
    'Sensitivity
    I2CAddress_3D = $32     'FF_WU_THS_1
    TEMP = $02              'DCRM = 0, THS6 = 0, THS5 = 0, THS4 = 0, THS3 = 0, THS2 = 0, THS1 = 1, THS0 = 0 (~36mg wake-up threshold, ~18mg step)
    gosub I2C_Write_3D      
    
    '---------------------
    
    'Duration
    I2CAddress_3D = $33     'FF_DURATION_1
    TEMP = $0D              'D7 = 0, D6 = 0, D5 = 0, D4 = 0, D3 = 1, D2 = 1, D1 = 0, D0 = 1 (130ms, 0 - 2.55s, 10ms step)
    gosub I2C_Write_3D      '0Ah = 100ms, 0Fh = 150ms, 14h = 200ms, 28h = 400ms, 32h = 500ms,
    
    '---------------------
    
    'Wake-Up Thresholds
    I2CAddress_3D = $30     'FF_WU_GFG_1
    TEMP = %01101010        'AOI = 0, LIR = 1, ZHIE = 1, ZLIE = 0, YHIE = 1, YLIE = 0, XHIE = 1, XLIE = 0 (wake-up above thresholde on x,y,z)
    gosub I2C_Write_3D
    
    '---------------------

Code how to deal when INT will occur:

Accelerometer:
    IF Int1_3D = 1 THEN         ' Int1_3D is IO pin for Interrup coming from 3D sensor
        gosub Accelerometer_Clear
        Accel_Alarm = 1         ' This is indecator that something must be done in main program        
    endif
    return

Accelerometer_Clear:            ' If sensor has moved during event hadling, then interrupt must be cleared once before new sequence
    I2CAddress_3D = $31         ' Clear interrupt request
    gosub I2C_Read_3D
    I2CAddress_3D = $23         ' Reset acceration/tilt value after interrupt 
    gosub I2C_Read_3D
    Return

Vdd_IO = Vdd = 5V. Even spec says 3.6V, I have used 5V already several years for same parts. Same voltage is used also for I2C pull-ups & CS (pins 1, 3, 6, 7).

[rodrik]

Thank you very much , I will try and let you know the results. If you need assistance for GSM and GPS, I am very very experienced
thanks again
haim