Hello,
I try to set up mma7660, that it runs in Auto Sleep with high sample rate and in Auto-Wake in low sample rate.
During the transition from Auto-Wake to Auto-Sleep I would like to fire an interrupt.
The interrupt trigger should be the Delta G condition.
Unfortunately I can not make it work. The initialisation looks like this:
void setup(){
write(MODE,0x00);//0x00 = Stan dby Mode -- allows config to be written
write(INTSU, INTSU_ASINT );// Interrupts for exiting Auto sleep
write(PDET,PDET_XDA|PDET_YDA|PDET_ZDA);//Tap detection is disabled, no threshold
write(PD,0x0);//No Tap Filtering
write(SR,SR_AMSR_AM16 |SR_AWSR_AW1); // Sampling Rate aktive 16 hz ; sleep 16 hz
write(SPCNT, 16); // counts for sleep counter register until sleep / wake occurs
write(MODE,MODE_MODE| MODE_AWE /*|MODE_ASE /*|MODE_IAH*/ );// MODE_MODE = Active Mode ; MODE_AWE = Auto Wake ;
}
To understand MMA7660 is in sleep or active mode I use following code
uint8_t GetwakeState(){
uint8_t s = read(SRST);
if ( s & SRST_AMSRS ) return 1 ; // AUTO SLEEP == active
if ( s & SRST_AWSRS ) return 0 ; // AUTO WAKE == sleeping
return -1;
}
Unfortunately between the transistions (sleep to wake or vice versa) I do not get always an interrupt,
If an interrupt occurs there are plenty in a row and not necessarly linked to the state change.
Output of log file
Ws: 0 = sleep ; 1 = active
Int : number of recived interrups
x,y,z = accelarations in x,y,z direction
Ws 0 Int 92 x = 2 y = -3 z = -13
Ws 0 Int 92 x = 2 y = -3 z = -13
Ws 0 Int 92 x = 4 y = -3 z = -21
Ws 0 Int 109 x = 4 y = -3 z = -21
Ws 0 Int 112 x = 4 y = -6 z = -25
Ws 2 Int 112 x = 3 y = -3 z = -21
Ws 2 Int 112 x = 3 y = -3 z = -21
Ws 0 Int 112 x = 2 y = -3 z = -17
Ws 0 Int 118 x = 2 y = -3 z = -17
Ws 0 Int 121 x = 4 y = -4 z = -27
Ws 0 Int 121 x = 4 y = -4 z = -27
Ws 1 Int 121 x = -3 y = 1 z = -18
Ws 1 Int 121 x = 1 y = 5 z = -23
Ws 1 Int 121 x = 1 y = 5 z = -23
Ws 1 Int 121 x = 1 y = 2 z = -22
Ws 1 Int 121 x = 1 y = 2 z = -22
Ws 2 Int 121 x = 3 y = 0 z = -17
Ws 2 Int 121 x = 3 y = 0 z = -17
Ws 1 Int 121 x = 1 y = 3 z = -19
Ws 1 Int 121 x = 1 y = 3 z = -19
Ws 0 Int 121 x = -2 y = -2 z = -24
Ws 1 Int 135 x = -7 y = -2 z = -20
Ws 1 Int 135 x = -7 y = -2 z = -20
Ws 2 Int 135 x = -1 y = 1 z = -23
If you can provide any sample code making use of the sleep / wake functionlity would be helpfull
Thanks a lot Andreas
