c – [USART – STM32F4xx]: How do I wait for the character to arrive in the status register (USART_SR)?

I am trying to realize a USART2_RX on a STM32F411VET.

During a video tutorial, I saw that the teacher uses these instructions to read data in the data register:

char USART2_read(void){
while(!(USART2->SR & 0x0020)){}
return USART2->DR;
}

In particular, he uses

while(!(USART2->SR & 0x0020)){}

to wait for a char. In compliance with the reference manual, the status register (USART_SR) appears to be 0x0C0 … in its reset form, so …

Why are we checking this value (ie 0x0020)?

Sorry if you find the question trivial.

Thank you for the possible answers. With best regards,

GM

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Register / Locate CVE for a PATH vulnerability when using go modules

It turns out that there is a fairly easy-to-exploit vulnerability when & go; & go; and the new modules will be used in Go. My search engine does not find a publication of the vulnerability in either Google results or registered CVEs. (It may be common knowledge, but I can not find it.)

I do not want credit, I just want to raise awareness, and it would be helpful to have a CVE that indicates when someone files bugs against existing packages.

Here is my problem:

  • The vulnerability can only be exploited if the user $ GOPATH / bin is in front of his $ PATH. So it's not necessarily a go-bug.
  • The vulnerability is related to the decentralized management of Go packages. In essence, anyone with a Github ID can install arbitrary-name binaries in the background on users' computers when a user is running go get, This is a feature that is desired by the go community, so I do not think it will change.
  • Depending on the $ PATH configuration, these binaries can easily mask frequently used system commands.
  • The user can determine in advance only by the code that the package installs a binary file with a specific name. There is no indication in the go get Command line of what will happen.
  • The default behavior of go get is all this to do in silence.

What is the right way to continue? Are you trying to submit a CVE? If so, is the CNA Google or is it just MITER? Is it correct to say that the software component is go getbecause I do not expect go get To change functionality?

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php – register the dependency of CSS and JS within a plugin class

I have this code:

  public function __construct()
  {
    add_action('wp_enqueue_script' , array( $this, 'initBootstrap' ));
    add_action('wp_enqueue_style' , array( $this, 'initBootstrap' ));
    add_action('wp_register_script' , array( $this, 'initParallax' ));
    add_action('wp_register_style' , array( $this, 'initParallax' ));
    add_action('wp_register_script' , array( $this, 'initSwiper' ));
    add_action('wp_register_style' , array( $this, 'initSwiper' ));
    add_shortcode( 'bs-container', array( $this, 'contentWrapper') );
    add_shortcode('bs-col', array( $this, 'colWrapper') );
    add_shortcode('bs-parallax', array( $this, 'parallaxSeparator') );
    add_shortcode('bs-slider', array( $this, 'imgSlider') );
  }

  /*
  *
  */

  public function initBootstrap()
  {
    if( !wp_script_is( 'bootstrap.bundle.min.js' , 'enqueued' ) ){
      wp_enqueue_script( 'bootstrap' , plugin_dir_url(__FILE__).'/bootstrap.bundle.min.js' );
    }

    if( !wp_style_is( 'bootstrap.min.css' , 'enqueued' ) ){
      wp_enqueue_style( 'bootstrap' , plugin_dir_url(__FILE__).'/js/bootstrap.min.css' );
    }
  }

  /*
  *
  */

  public function initParallax()
  {
    if( !wp_script_is( 'universal-parallax.min.js' , '/js/universal-parallax.min.js' ) ){
      wp_register_script( 'parallax' , plugin_dir_url(__FILE__).'/js/universal-parallax.min.js' );
    }

    if( !wp_style_is( 'universal-parallax.min.css' , 'enqueued' ) ){
      wp_register_style( 'parallax' , plugin_dir_url(__FILE__).'/css/universal-parallax.min.css' );
    }
  }

  /*
  *
  */

  public function initSwiper()
  {
    if( !wp_script_is( 'swiper.min.js' , 'enqueued' ) ){
      wp_register_script( 'swiper' , plugin_dir_url(__FILE__).'/js/swiper.min.js' );
    }

    if( !wp_style_is( 'swiper.min.css' , 'enqueued' ) ){
      wp_register_style( 'swiper' , plugin_dir_url(__FILE__).'/css/swiper.min.css' );
    }
  }

I want to register the dependency of a plugin, but I can not. What's wrong with my code?
I used that add_action but within the construct of my plugin class the required files are not loaded and the js and css are needed for the shortcodes I have registered. Can someone suggest a fix?