MY9221 Class Reference

API for MY9221-based LED Bars. More...

Detailed Description

• ID: my9221
• Name: Grove LED Bar
• Other Names: MY9221 LED Bar
• Category: display
• Manufacturer: seeed
• Link: http://www.seeedstudio.com/wiki/Grove_-_LED_Bar
• Connection: gpio
• Kit: eak

This module defines the MY9221 interface for libmy9221

    upm::MY9221 *bar = new upm::MY9221(8, 9);

    signal(SIGINT, sig_handler);

    while (!running) {
        for (int idx = 1; idx < 11; idx++) {
            bar->setBarLevel (idx);
            usleep(1000);
        }
    }

  // Instantiate a MY9221, we use D2 for the data, and D3 for the
  // data clock.  This was tested with a Grove LED bar.

  upm::MY9221* bar = new upm::MY9221(2, 3);
  
  while (shouldRun)
    {
      // count up from green to red
      for (int i=1; i<=10; i++)
        {
          bar->setBarLevel(i, true);
          usleep(50000);
        }
      sleep(1);

      // count down from red to green
      for (int i=1; i<=10; i++)
        {
          bar->setBarLevel(i, false);
          usleep(50000);
        }
      sleep(1);
    }

Public Member Functions
	MY9221 (uint8_t di, uint8_t dcki)
mraa::Result	setBarLevel (uint8_t level, bool direction=true)
std::string	name ()

Constructor & Destructor Documentation

MY9221	(	uint8_t	di,
		uint8_t	dcki
	)

Instantiates an MY9221 object

Parameters

di	Data pin
dcki	Clock pin

Member Function Documentation

mraa::Result setBarLevel	(	uint8_t	level,
		bool	direction = true
	)

Sets the bar level

Parameters

level	Selected level for the bar (1 - 10)
direction	Up or down; up is true and default

std::string name ( )

inline

Returns the name of the component

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The documentation for this class was generated from the following files:

• /var/lib/jenkins/workspace/upm-doc-stable/src/my9221/my9221.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/my9221/my9221.cxx