Hi,
Wondering if anyone can help. I had the Remote Proc/RpMsg working passing
data to and fro. However I liked the functionality of uio_pruss so I have
updated my kernel to 4.4.20-ti-r44 following advice from some of the guys
on the board. Thanks to all who responded last time, uio_pruss is what I
need.
So I have rebuilt my device tree to include am33xx-pruss-io.dtsi. and
installed under the kernel directory in /boot/dtbs. I reboot and when I run
lsmod I can see the three uio kernel objects. I am sure it is using the
rebuilt device tree because I turned off the heartbeat on the USR0 led as a
test in the am335x-common.dtsi. It isn't toggling anymore.
I have built an example PRU program, PRU_LED0. I have setup the hex utility
to run the following cmd file
--b
--image
ROMS {
PAGE 0:
.text: o = 0x0, l = 0x2000, files={text.bin}
PAGE 1:
.data: o = 0x0, l = 0x2000, files={data.bin}
}
I have an error, if I use this it complains 'not enough files for ".text"
and ".data". So I removed the files command to make it like what I built
for Remotew Proc/RpMsg and it builds a _image.obj. Trouble is that it is
the test and data combined. The rp_proc loader I think can split the file
and load text and data. However I can't see a way to split them for using
with uio_pruss which calls prussdrv_exec_program and
prussdrv_load_datafile.
Is there a utility or macro I could use to find the data and text portions
of the image obj and split them ?
I am pretty sure this is the problem. I took portions of the
prussdrv_exec_program function into my programm to see where the calls
fails. I seem to be able to run prussdrv_pru_disable. It is failing at
prussdrv_pru_write_memory, just before it calls prussdrv_pru_enable_at to
run the code.
Fustrating... I am sure I am missing something obvious.
Cheers,
Paul
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