Posted on October 10, 2017 at 15:14 i am working with the LSM9DS1.
I want to read the accelerometer data using interrupts. The problem is that, when i enable the 'data ready interrupt'(INT_DRDY_XL) and read and printf STATUS_REG, to see whether one or more interrupts have been generated, it gives me back 0b00000101 . But it should be 0b10000101 because a new interrupt should have been generated.
my sensor register are:
void init_accel_interrupt(void){
uint8_t reg_value =0;
reg_value = 0x07 << 3; // x,y,z axis enabled
write_reg(CTRL_REG5_XL,reg_value);
reg_value = 0;
reg_value = (0x06 << 5); // 952 Hz odr
reg_value|= (0x02 << 3); // +-4g
reg_value|= (0x01 << 2); // bw select according to bw[1:0]
reg_value|= (0x00 << 0); //408 hz bw
write_reg(CTRL_REG6_XL,reg_value);
reg_value = 0;
reg_value = (0x01 << 7);// high resolution
reg_value|= (0x03 << 5); // cutofffrequency odr/50= 0 odr/100 =1 odr/400=3
reg_value|= (0x01 << 2); // filter enabled
write_reg(CTRL_REG7_XL,reg_value);
reg_value = (0x01 << 0);
write_reg(INT1_CTRL,reg_value); // data ready interrupt int1
reg_value = (0x01 << 0);
write_reg(INT2_CTRL,reg_value); // data ready interrupt int2
reg_value = (0x01 << 4) | (0x01 << 5) ;// open drain, active low
write_reg(CTRL_REG8,reg_value);
reg_value = (0x01 << 3); // data available timer enabled
write_reg(CTRL_REG9,reg_value);
}
and my loop is:
while (1){
rv = read_reg(STATUS_REG_0);//
printf_P(PSTR('%i \n'),rv);
rv = read_reg(STATUS_REG_1);//
printf_P(PSTR('%i \n'),rv);
rv = read_reg(INT_GEN_SRC_XL);//
printf_P(PSTR('%i \n'),rv);
_delay_ms(1);
output is : 5
5
0
