FSM_BUSY is recoverable without a POR
https://e2e.ti.com/support/processors/f/791/t/689926
I have used the ADC without any errors in a product
buffer the input with an opamp for protection and your good to go
On 10/7/2020 8:58 AM, Darren Freed wrote:
I personally would not use the AM335x onboard ADC in any form for a
production device. There is a known issue (Google FSM_BUSY) where the
FSM gets into a hung state that cannot be resolved without POR. I
banged my head against that problem for several months before
realizing what was happening. My setup involved using a PRU to acquire
the data and send it to user space via rpmsg. I've moved on to an
ADS1299 based solution on a custom cape.
If you use devmem (or similar) to view the ADC registers (ADCSTAT in
particular) during the hung state, you can see that bit 5 and bit 4
will both be set: FSM_BUSY=1 and STEP_ID= idle, which obviously isn't
possible, meaning the FSM is hung and can't recover without POR.
On Wed, Oct 7, 2020 at 2:41 AM morgant...@gmail.com
<mailto:morgant...@gmail.com> <morgantabra...@gmail.com
<mailto:morgantabra...@gmail.com>> wrote:
Hello beaglebone community,
This is my first post.
I used beaglebone to develop a prototype for for a self-cleaning
smoothie machine that we plan to commercialize (see video below).
It has multiple sensors and outputs to run motors/solenoids while
ensuring user safety.
https://www.youtube.com/watch?v=76XDJK5V0PA&feature=share&ab_channel=PascalKriesche
Right now we have. BBB running a linux OS and running a script
we wrote in JS. One issue we have had was the 1.8V analog sensors
losing signal which required us to reboot the system every tie
that occurred. We also had an issue flashing 2 out of our 4
prototypes with an image that worked (seems to be a firmware
version issue leasing to an incorrect hardware pin mapping).
I know eventually we want to use a chip on board, but for the
initial production run we were hoping on sticking to a prebuilt
onboard computing module for the initial 1000 units in order to
save time and costs. I was wondering if anyone in this forum had
experience launching a product with beaglebone and if this
instability can be resolved with the correct I/O filtering on our
PCB and software functionality.
Thanks in advance!
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