accelerometer_result_error

[Nero]

Hello ,I wrote a program that allows to control the LIS2DE12 accelerometer but I am reviewing a fixed result which is always X = 72, Y = 33, Z = 32, I find out where the problem , thanks you in advance.

`int main(void)	
{
	int8_t X,Y,Z;
    
    uart_config();
    
    //accel_I2C_datawrite(&twi_instance);
    twi_init();
     m_device_address = accel_addr;
 
    uint8_t rx_buffer[6];
   rx_buffer[0] = 0x00;
//int threshold;
//accel_set_threshold(threshold);
    
        




            while(true)
        {
            accel_xyz_read(&X,&Y,&Z);
         printf("Groupeer accelero DATA2:  X: %d  Y: %d  Z: %d  \n", X ,Y,Z);
					nrf_delay_ms(1000);
        }      
    
}
`

[Nero]

Hello, you are right, I have a mistake in the function read.I tested it

  X = accel_I2C_register_read(m_device_address,access_data,( uint8_t *) WHO , sizeof(WHO));

printf(" result is %x ,%d ",WHO, X);

I find 17 instead of 33 107/5000 So I have not properly configure reading and writing, I will change the ones you recommended

[Nero]

Hello ,Here are the functions I used to read and write For the read I sent a '1' to allow read

ret_code_t accel_I2C_register_read(uint8_t slave_addr, uint8_t reg_addr,  uint8_t * pdata, uint32_t bytes)

{
ret_code_t ret_code; //to configured the I2C read ret_code = nrf_drv_twi_tx(p_twi_master,slave_addr, &reg_addr,1,false);

if(ret_code != NRF_SUCCESS)
{
 
        return ret_code;
}

ret_code = nrf_drv_twi_rx(p_twi_master,slave_addr, pdata, bytes);

return ret_code;

} ret_code_t accel_I2C_register_write(uint8_t slave_addr,uint8_t * pdata, uint32_t bytes) { ret_code_t ret_code;

ret_code = nrf_drv_twi_tx(p_twi_master, slave_addr, pdata, bytes , false);

return ret_code;

}

Is what i have is correct?

Thanks,

[GS]

Hi Amed, I have edited my answer

[Nero]

I thank you greatly for help, just when I changed the variable "uint8_t rx_buffer [6];" In variable globle the program accel read axes does not work

[Nero]

Hello, For the function accel_set threshold it does not work (it is the function that is responsible for the detection of interrupts: if there is a movement or not)

int accel_set_threshold(int threshold)

{ m_device_address = accel_addr;

int max_threshold = 127* THS_2G  ;
uint8_t ths = threshold/THS_2G;
uint8_t accel_reg[2];
printf( "hors threshold \n");

if (threshold > max_threshold) { printf( "Threshold out of range\n"); return -1; } else { accel_reg[0] = INT1_THS;

accel_reg[1] = ths;

accel_I2C_register_write(m_device_address,accel_reg, sizeof(accel_reg) );

// accel_I2C_register_read(m_device_address,INT1_THS, &ths ,sizeof(INT1_THS));

printf (" test"); printf ("Threshold @ %x(%d)\n",ths, ths);

return 0;

} Thanks