AXDL355 Activity Detection Enable

Hi, 

yes, reset means disable for activity detection, and active 0 (or active low) means that when the interrupt occurs the pin goes from high to low. 

Regards, 

Pablo. 

Hi, 

yes, reset means disable for activity detection, and active 0 (or active low) means that when the interrupt occurs the pin goes from high to low. 

Regards, 

Pablo. 

Hi Pablo,

Thanks for your reply.

I still cannot get the expected interrupt. Here are my settings:

{2C 0x02} Fast Mode, INT1,2 active low, Range 4G

{2D 0x00} Measure Mode

{24 0x07} x, y, and z activity all enabled

{25 0x4B} {26 0x00} (0x4B00 << 3) is about 1.5G

{27 0x01} One reading > 1.5G, trigger

In my test code, I continuously read x, y, and z value, and value of Status register 0x04. When I shake the chip, I can see sometimes those readings bigger than the threshold and Activity bit becomes 1. However, I don't see the expected interrupt.

I did one thing to make sure that my code for interrupt works: I manually connect the interrupt pin to GND and I can see interrupt function is called.

Can you help me on what I did wrong or what I missed? Many thx.

 Hi DJSG , 

I see that in your configs is not the INT_MAP register (0x2A). 

this register needs to be configured to map the desired interrupt pin. 

I hope this helps, 

Pablo 

Thx Pablo. It is working now.

Hi Pablo,

I need to check with you for another issue, which happened during my test with ADXL355.

It seems to me that after interrupt event, MCU should read the status register (0x04); otherwise there is no trigger generated afterwards even if there is new activity event. Is it true?