About mchahn

mchahn · 2023-12-29

I want to let the LIS2DH12 FIFO fill and wrap freely and then at a point in time access the history (LIS2DH12 contents) in a particular manner. I want to first read the newest 15 samples (in any order) and then read the oldest 15 (in any order). I ...

mchahn · 2023-12-22

I need to clear the fifo and then at a later time read all samples taken since then. Then later I will repeat this. I don't want any samples before or after that time window to get in my data. I looked through the library and I can't see anything t...

mchahn · 2022-07-05

I have used the wait feature before. I treat it just as if there is no wait. I have "while(true) wait;" in my main.c. (I only use interrupts, the code is pure interrupt-driven). I need to use halt now. Can I use halt the same way? Will the inte...

mchahn · 2022-02-06

I cannot get interrupts to work and I found that NonHandledInterrupt is getting called. How do I find out what IRQ triggered a debug breakpoint at NonHandledInterrupt? I've stared at my code for hours and all it does is stare back.

mchahn · 2022-01-31

I put the cosmic license in the wrong location, not in license folder. When I tried my first build in stvd it asked for license and I tried and tried in a loop. Eventually I got in a situation where it would just give the error in the log when I tr...

mchahn · 2023-12-30

I've got a solution I'm pretty happy with. If anyone cares, this is what I'm doing ...I'm running the FIFO in stream mode. After I capture a picture I'm reading the output regs 32 times to get all the FIFO contents which represent the acceleration ...

mchahn · 2022-08-09

I have been unable to get halt to work, even with my simple code. However, I have coded similar behavior by turning off the clock to all peripherals and then entering a wait-for-interrupt. If I understand the behavior correctly this reults in simil...

mchahn · 2022-08-07

I need more help. I coded the halt as directed. There is just a loop in main that waits for a signal variable that tells it to halt. Then a button on a pin interrupts to leave halt mode. If I comment out the halt then everything works including t...

mchahn · 2022-07-22

Thanks.

mchahn · 2022-02-06

I figured out one way to do it. I made a number of routines: NonHandledInterrupt1, NonHandledInterrupt2, NonHandledInterrupt3, etc. for sections of interrupt vectors. I was able to identify the guilty interrupt. It would be nice if there was an easie...

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LIS2DH12: access LIS2DH12 in historical order?

How do I reset the fifo in the LIS2DH12

Is halt behavior the same as wait except for clock interruption?

How do I find out what IRQ triggered a debug breakpoint at NonHandledInterrupt?

How do I get stvd to ask for cosmic license (or enter it in some other progM?)

Re: LIS2DH12: access LIS2DH12 in historical order?

Re: Is halt behavior the same as wait except for clock interruption?

Re: Is halt behavior the same as wait except for clock interruption?

Re: Is halt behavior the same as wait except for clock interruption?

Re: How do I find out what IRQ triggered a debug breakpoint at NonHandledInterrupt?