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Gonzalo Ruiz e8baba6de8 README: add CC8X boards interfaces to README files 
Signed-off-by: Gonzalo Ruiz <Gonzalo.Ruiz@digi.com>
 		2019-04-12 17:31:06 +02:00
..
Makefile debug: changes in the makefile to reduce the optimization level. 2017-11-30 13:12:58 +01:00
README.md README: add CC8X boards interfaces to README files 2019-04-12 17:31:06 +02:00
main.c pwm: fix a problem with the pwm example. 2017-11-30 13:12:58 +01:00

README.md

Digi APIX PWM Example Application

Example application to access and manage PWM lines using the Digi APIX library.

This application enables one PWM line of the board using a frequency of 1000Hz. Then, it progressively modifies the duty cycle in a loop from 10% to 90% and vice-versa.

The PWM lines used in this example are mapped as follows in the Digi boards:

  • ConnectCore 6 SBC: PWM1 - Pin 10 of the parallel video (LCD) connector (J21).
  • ConnectCore 6 Plus SBC: PWM1 - Pin 10 of the parallel video (LCD) connector (J21).
  • ConnectCore 6UL SBC Express: PWM1 - Pin 27 of the expansion connector (J8).
  • ConnectCore 6UL SBC Pro: PWM4 - Pin 11 of the GPIO connector (J30).
  • ConnectCore 8X SBC Express: MCA PWM1 channel 0 - Pin 33 of the Raspberry Pi Expansion connector (J11).
  • ConnectCore 8X SBC Pro: MCA PWM1 channel 0 - Pin A5 of the Expansion connector (J20).

Running the application

Once the binary is in the target, launch the application:

# ./apix-pwm-example
Example application using libdigiapix PWM support

Usage: apix-pwm-example <pwm-chip> <pwm-freq>

<pwm-chip>       PWM chip number or alias
<pwm-channel>    PWM channel number or alias
<pwm-freq>       Frequency to use (Hz)

Aliases for PWM can be configured in the library config file

If no arguments are provided, the example will use the default values:

  • For the interfaces, default values are configured in /etc/libdigiapix.conf.
  • Specific application default values are defined in the main file.

Compiling the application

This demo can be compiled using a Digi Embedded Yocto based toolchain. Make sure to source the corresponding toolchain of the platform you are using, e.g:

$> . <DEY-toolchain-path>/environment-setup-cortexa7hf-vfp-neon-dey-linux-gnueabi
$> make

More information about Digi Embedded Yocto.

License

Copyright 2017, Digi International Inc.

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.