Just a guess CCS DSP examples use a gel script to configure the ARM keep it 
from interfering until your code is debugged. Then you load the binary from ARM 
and start DSP. My experience on similar SOC was using an RTOS on ARM not Linux 
so I can't help.
This seems to be saying oops 2 people want same resources.Custom Error: MASTER 
DSP1_MDMA TARGET L4_PER1_P3".
I'm always amazed when people ask questions in this forum about something 
supported by TI E2E forum is SDK. The comments your going to get come from 
user's that don't use CCS or JTAG.
Good luck

Sent from Yahoo Mail on Android 
 
  On Thu, Oct 22, 2020 at 11:30 AM, 
[email protected]<[email protected]> wrote:   Hello everyone,
I recently started developping on the BeagleBone AI, I would like to use the 
DSP for interfacing with an AUDIO CODEC which has to be configured through I2C. 
My board is running the official Debian image for BBAI. 

I'm programming the DSP firmware using CCS and I load the image on the DSP 
using remoteproc as proposed by TI. I started by following tutorial in the 
Linux Processor SDK explaining how to program a remotecore for use with A15 
(host) under Linux.
I simply tried to use the I2C_TemperatureSensor example to communicate with a 
simple external micro-controller but I face multiple errors:
-If I try to use the I2C instance 3 or 4, dmesg reports "L3 Custom Error: 
MASTER DSP1_MDMA TARGET L4_PER1_P3". -If I try to use the I2C instance 5, dmesg 
doesn't report anything, but nothing happens on the I2C instance 5.
Note: I disabled all unused I2C instances (2-3-4-5) in the device tree
Does anyone have an idea ? Did anyone already succeed in getting I2C working on 
the DSP with Linux on A15 ? 

Thank you.


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