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led bar

k-led-bar

Ausgangslage

  • Zugmagnet CII/A1464
    • Elektromagnet 12 V- / 2,6 A 30 Watt
    • Einschaltdauer 10 %
  • Relais steuern die Zugmagnete
    • 5 Bumber
    • 4 Flips

Bedingungen

  • die Einschaltdauer von 10 % einhalten
    • z.B: innerhalb von 5 Sekunden darf das Relais nur maximal 0.5 Sekunden eingeschaltet sein

Aufbau

Handlungsziele

Vorgehen Hannok Handlungsnotwendige Kenntnisse
mehrere Relais steuern Register / Array
Einschaltdauer max 10% Timer besser: Schieberegister
schnelle Reaktion auf Ereignis Interrupt, volatile
Testbarkeit Loggen, ASSERT

Code Sample

/*
Grove LED Bar - Basic Control Example
This example will show you how to use the setBits() function of this library.
Set any combination of LEDs using 10 bits.
Least significant bit controls the first LED.

The setBits() function sets the current state, one bit for each LED.
First 10 bits from the right control the 10 LEDs.

eg. 0b00000jihgfedcba
a = LED 1, b = LED 2, c = LED 3, etc.

dec    hex     binary
0    = 0x0   = 0b000000000000000 = all LEDs off
5    = 0x05  = 0b000000000000101 = LEDs 1 and 3 on, all others off
341  = 0x155 = 0b000000101010101 = LEDs 1,3,5,7,9 on, 2,4,6,8,10 off
1023 = 0x3ff = 0b000001111111111 = all LEDs on
                      |        |
                      10       1

The bits >10 are ignored, shown here as x: 0bxxxxx0000000000
*/

#include <Grove_LED_Bar.h>

Grove_LED_Bar bar(7, 6, 0);  // Clock pin, Data pin, Orientation

void setup() {
  // nothing to initialize
  bar.begin();
}

void loop() {
  // Turn on all LEDs
  bar.setBits(0x3ff);
  delay(1000);

  // Turn off all LEDs
  bar.setBits(0x0);
  delay(1000);

  // Turn on LED 1
  // 0b000000000000001 can also be written as 0x1:
  bar.setBits(0b000000000000001);
  delay(1000);

  // Turn on LEDs 1 and 3
  // 0b000000000000101 can also be written as 0x5:
  bar.setBits(0b000000000000101);
  delay(1000);

  // Turn on LEDs 1, 3, 5, 7, 9
  bar.setBits(0x155);
  delay(1000);

  // Turn on LEDs 2, 4, 6, 8, 10
  bar.setBits(0x2AA);
  delay(1000);

  // Turn on LEDs 1, 2, 3, 4, 5
  // 0b000000000011111 == 0x1F
  bar.setBits(0b000000000011111);
  delay(1000);

  // Turn on LEDs 6, 7, 8, 9, 10
  // 0b000001111100000 == 0x3E0
  bar.setBits(0b000001111100000);
  delay(1000);
}

Grove LED Bar

Grove_LED_Bar

Grove LED Bar is comprised of a 10 segment LED gauge bar and an MY9221 LED driver. It can be used as a indicator for remaining battery life, voltage, water level, music volume or other values that require a gradient display. There are 10 discrete LED bars in the LED bar graph: one red, one yellow, one light green, and the rest green.

For more information, please refer to the wiki: Grove_LED_Bar and LED_Bar

SKU: LED05031P

This software is written by Frankie Chu for seeed studio
and is licensed under The MIT License. Check License.txt for more information.

Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.

Seeed Studio is an open hardware facilitation company based in Shenzhen, China.
Benefiting from local manufacture power and convenient global logistic system,
we integrate resources to serve new era of innovation. Seeed also works with
global distributors and partners to push open hardware movement.

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