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From 06/10/2024 to 07/09/2024

07/03/2024

02:19 PM Software Development: RE: MityDSP-L138 Power Draw in Deep Sleep? Waking ARM core from DSP core? Power and Sleep Controller (PSC)
Michael Bisbano wrote in message#6697:
> Hi Jonathan,
> Thank you for the response, please let me know what you fi...
Jonathan Cormier

07/01/2024

09:16 PM Software Development: RE: MityDSP-L138 Power Draw in Deep Sleep? Waking ARM core from DSP core? Power and Sleep Controller (PSC)
Hi Jonathan,
Thank you for the response, please let me know what you find out! The system as a whole must be under ...
Michael Bisbano
07:05 PM Software Development: RE: MityDSP-L138 Power Draw in Deep Sleep? Waking ARM core from DSP core? Power and Sleep Controller (PSC)
Michael Bisbano wrote:
> Hi all,
>
> I was wondering if anyone had data on power draw for the MityDSP-L138 in dee...
Jonathan Cormier
06:34 PM Software Development: MityDSP-L138 Power Draw in Deep Sleep? Waking ARM core from DSP core? Power and Sleep Controller (PSC)
Hi all,
I was wondering if anyone had data on power draw for the MityDSP-L138 in deep sleep? My application is bat...
Michael Bisbano
03:49 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Fred Weiser wrote in message#6688:
> Changing the timer is probably not in my best interest; my project supports dow...
Jonathan Cormier

06/27/2024

09:06 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Changing the timer is probably not in my best interest; my project supports down to 1200 baud with packets up to 256 ... Fred Weiser
06:12 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Here's the snip:... Fred Weiser
05:45 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Looks like wait_for_xmitr has a 10ms timeout, this might explain why the TXEN is enabled for a constant time. At low... Jonathan Cormier
04:19 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
What does your pinmux look like for UART2? Jonathan Cormier
03:36 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Please see two attached scope traces; the second with a 7 character buffer, the first with a 16 character buffer. I w... Fred Weiser
02:31 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
It looks like (in the 3.2 kernel anyway) the only serial port driver that supports the delay_rts_after_send option is... Tim Iskander
01:46 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Thanks for the ideas; I'm looking into the code cited above now; I don't have any new news there at this time.
Ho...
Fred Weiser
01:05 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
My suspicion is that the register read in wait_for_xmitr() is "lying" and the UART is actually still serializing the ... Tim Iskander
08:47 PM Software Development: RE: RS485 Direction Control on UART1
Seems like it could work. Good find. Jonathan Cormier
07:17 PM Software Development: RE: RS485 Direction Control on UART1
I did come across this application note from TI: https://www.ti.com/lit/ug/tidubw6/tidubw6.pdf?ts=1719509747706
(if ...
Michael Bisbano

06/25/2024

09:59 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
The kernel driver code for RS485 support can be found here: https://support.criticallink.com/gitweb/?p=linux-davinci.... Jonathan Cormier
06:58 PM Software Development: RE: Serial port 2 issue, RS485, RTS drops to early
Seems a "paste" didn't work as expected...
SER_RS485_USE_GPIO is the same as 1<<5
Fred Weiser
06:54 PM Software Development: Serial port 2 issue, RS485, RTS drops to early
We are having a problem with serial port ttyS2 on our L138 SoM which I believe resides in the Linux driver or the TI ... Fred Weiser

06/20/2024

07:57 PM Software Development: RE: RS485 Direction Control on UART1
How long are you looking for?
The kernel documentation mentions getting extended distance for rs232 by using UTP c...
Jonathan Cormier
03:43 PM Software Development: RE: RS485 Direction Control on UART1
Hi Jonathan,
thanks for the quick response. I will look into the 8250 driver, it might be useful (if only for my ...
Michael Bisbano

06/19/2024

07:09 PM Software Development: RE: RS485 Direction Control on UART1
The serial 8250 driver has an rs485 mode which we extended to allow using a gpio to generate a RS485 TX enable. Howe... Jonathan Cormier
04:36 PM Software Development: RS485 Direction Control on UART1
Hi all,
My application requires installation embedded in a battery power system with long wire. I would like acces...
Michael Bisbano

06/10/2024

11:08 AM Software Development: RE: FPGA (FIFO) -> DSP (DMA) transfer problem
There is a cross-bar that sits between EMIFA on the L138 and the DSP / ARM / peripheral masters.
When a read reque...
Michael Williamson
07:52 AM Software Development: RE: FPGA (FIFO) -> DSP (DMA) transfer problem
Thank you for answer.
We will conduct the above experiment later.
Currently, we are trying to increase the RD Clk...
Kyungguk Bok
 

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