Hi,
I need to add one more thing to this. On running *sudo
/opt/scripts/tools/version.sh, *this is the output:
https://pastebin.com/tgwb3u3S
Regards,
Vedant Paranjape
On Monday, July 20, 2020 at 1:36:48 AM UTC+5:30 Vedant Paranjape wrote:
>
> Hi,
> I wanted to use PRU-ICSS's eCap module to generate PWM signals, It is
> something I want to implement in my GSoC project. I referred to AM335x TRM
> <https://elinux.org/images/6/65/Spruh73c.pdf> section 15.3, It has a
> detailed description of how to use ECAP to generate PWM signals at section
> 15.3.3.5.
> Since pru_ecap.h was missing bit fields required to use PWM mode, as
> described in the TRM (15.3.3.5.1) I defined those required bit fields from
> register descriptions in the TRM (15.3.4). Here's the new header I defined:
> https://github.com/VedantParanjape/pru-ecap-pwm/blob/master/include/am335x/pru_ecap.h
>
> According to the register value (Table 15-100 and Example 15-13 of the
> TRM) needed to be set to get it working, I set the registers in my code.
> Here is my main code which drives the eCap module to generate PWM:
> https://github.com/VedantParanjape/pru-ecap-pwm/blob/master/main0.c
>
> I am using pru-gcc version:
>
>
>
>
>
> *pru-gcc (GCC) 10.0.1 20200315 (experimental)Copyright (C) 2020 Free
> Software Foundation, Inc.This is free software; see the source for copying
> conditions. There is NOwarranty; not even for MERCHANTABILITY or FITNESS
> FOR A PARTICULAR PURPOSE.*
> Command to compile:
> *pru-gcc main0.c -o pwm -I./inlude/ -I./include/am335x/ -mmcu=am335x.pru0*
>
> Command to load binary and start PRU:
>
> *cp pwm /lib/firmware/am335x-pru0-fw *
>
> *config-pin p9.42 pru_ecap *
> *echo start > /sys/class/remoteproc/remoteproc0/state *
>
> When I load the binary, it loads without any issue, but i fail to get
> output on p9.42 pin, which is the pr1_ecap pin. I check with a multimeter,
> It shows Nada, zero Volts.
>
> I am using a BeagleBone Black Wireless:
> *Linux beaglebone 4.19.94-ti-r45 #1buster SMP PREEMPT Thu Jun 18 19:18:41
> UTC 2020 armv7l GNU/Linux*
>
> This the output on running *(sudo show-pins | sort*)
> https://pastebin.com/r2128R9b
> This is my *uEnv.txt*: https://pastebin.com/99qxs8NN
>
> Regards,
> Vedant Paranjape
>
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