Grove - LED Bar

Grove - LED Bar

LED Bar består av en 10-segment LED-display. Den kan användas som indikator för återstående batterilivslängd, spänning, vattennivå, musikvolym eller andra värden som kräver en gradientdisplay. Det finns 10 LED-streck i LED-streckdiagrammet: en röd, en gul, en ljusgrön och sju gröna streck.

Kompatibilitet

• Arduino
• Raspberry Pi

Port

• Digital

Bibliotek

https://github.com/Seeed-Studio/Grove_LED_Bar

Exempelkod

Arduino

#include <Grove_LED_Bar.h>

Grove_LED_Bar bar(9, 8, 0);  // Clock pin, Data pin, Orientation
unsigned int state;

void setup()
{
  // nothing to initialize
  bar.begin();
}
void loop()
{
  bar.setLevel(2);  // Switch on the first two LEDs
  state = bar.getBits();  // Get the current state (which is 0x3)

  // Bounce to the right
  for (int i = 0; i < 8; i++)
  {
    // Bit shift left and update
    state <<= 1;
    bar.setBits(state);
    delay(200);
  }

  // Bounce to the left
  for (int i = 0; i < 8; i++)
  {
    // Bit shift right and update
    state >>= 1;
    bar.setBits(state);
    delay(200);
  }
}

Raspberry Pi

import time
import grovepi
import random

# Connect the Grove LED Bar to digital port D5
# DI,DCKI,VCC,GND
ledbar = 5

grovepi.pinMode(ledbar,"OUTPUT")
time.sleep(1)
i = 0

# LED Bar methods
# grovepi.ledBar_init(pin,orientation)
# grovepi.ledBar_orientation(pin,orientation)
# grovepi.ledBar_setLevel(pin,level)
# grovepi.ledBar_setLed(pin,led,state)
# grovepi.ledBar_toggleLed(pin,led)
# grovepi.ledBar_setBits(pin,state)
# grovepi.ledBar_getBits(pin)

    while True:
        try:
        print "Test 1) Initialise - red to green"
        # ledbar_init(pin,orientation)
        # orientation: (0 = red to green, 1 = green to red)
        grovepi.ledBar_init(ledbar, 0)
        time.sleep(.5)


        print "Test 2) Set level"
        # ledbar_setLevel(pin,level)
        # level: (0-10)
        for i in range(0,11):
            grovepi.ledBar_setLevel(ledbar, i)
            time.sleep(.2)
        time.sleep(.3)

        grovepi.ledBar_setLevel(ledbar, 8)
        time.sleep(.5)

        grovepi.ledBar_setLevel(ledbar, 2)
        time.sleep(.5)

        grovepi.ledBar_setLevel(ledbar, 5)
        time.sleep(.5)


        print "Test 3) Switch on/off a single LED"
        # ledbar_setLed(pin,led,state)
        # led: which led (1-10)
        # state: off or on (0,1)
        grovepi.ledBar_setLed(ledbar, 10, 1)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 9, 1)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 8, 1)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 1, 0)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 2, 0)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 3, 0)
        time.sleep(.5)


        print "Test 4) Toggle a single LED"
        # flip a single led - if it is currently on, it will become off and vice versa
        # ledbar_toggleLed(ledbar, led)
        grovepi.ledBar_toggleLed(ledbar, 1)
        time.sleep(.5)

        grovepi.ledBar_toggleLed(ledbar, 2)
        time.sleep(.5)

        grovepi.ledBar_toggleLed(ledbar, 9)
        time.sleep(.5)

        grovepi.ledBar_toggleLed(ledbar, 10)
        time.sleep(.5)


        print "Test 5) Set state - control all leds with 10 bits"
        # ledbar_setBits(ledbar, state)
        # state: (0-1023) or (0x00-0x3FF) or (0b0000000000-0b1111111111) or (int('0000000000',2)-int('1111111111',2))
        for i in range(0,32):
            grovepi.ledBar_setBits(ledbar, i)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 6) Get current state"
        # state = ledbar_getBits(ledbar)
        # state: (0-1023) a bit for each of the 10 LEDs
        state = grovepi.ledBar_getBits(ledbar)
        print "with first 5 leds lit, the state should be 31 or 0x1F"
        print state

        # bitwise shift five bits to the left
        state = state << 5
        # the state should now be 992 or 0x3E0
        # when saved the last 5 LEDs will be lit instead of the first 5 LEDs
        time.sleep(.5)


        print "Test 7) Set state - save the state we just modified"
        # ledbar_setBits(ledbar, state)
        # state: (0-1023) a bit for each of the 10 LEDs
        grovepi.ledBar_setBits(ledbar, state)
        time.sleep(.5)


        print "Test 8) Swap orientation - green to red - current state is preserved"
        # ledbar_orientation(pin,orientation)
        # orientation: (0 = red to green, 1 = green to red)
        # when you reverse the led bar orientation, all methods know how to handle the new LED index
        # green to red
        grovepi.ledBar_orientation(ledbar, 1)
        time.sleep(.5)

        # red to green
        grovepi.ledBar_orientation(ledbar, 0)
        time.sleep(.5)

        # green to red
        grovepi.ledBar_orientation(ledbar, 1)
        time.sleep(.5)


        print "Test 9) Set level, again"
        # ledbar_setLevel(pin,level)
        # level: (0-10)
        # note the red LED is now at index 10 instead of 1
        for i in range(0,11):
            grovepi.ledBar_setLevel(ledbar, i)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 10) Set a single LED, again"
        # ledbar_setLed(pin,led,state)
        # led: which led (1-10)
        # state: off or on (0,1)
        grovepi.ledBar_setLed(ledbar, 1, 0)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 3, 0)
        time.sleep(.5)

        grovepi.ledBar_setLed(ledbar, 5, 0)
        time.sleep(.5)


        print "Test 11) Toggle a single LED, again"
        # ledbar_toggleLed(ledbar, led)
        grovepi.ledBar_toggleLed(ledbar, 2)
        time.sleep(.5)

        grovepi.ledBar_toggleLed(ledbar, 4)
        time.sleep(.5)


        print "Test 12) Get state"
        # state = ledbar_getBits(ledbar)
        # state: (0-1023) a bit for each of the 10 LEDs
        state = grovepi.ledBar_getBits(ledbar)

        # the last 5 LEDs are lit, so the state should be 992 or 0x3E0

        # bitwise shift five bits to the right
        state = state >> 5
        # the state should now be 31 or 0x1F


        print "Test 13) Set state, again"
        # ledbar_setBits(ledbar, state)
        # state: (0-1023) a bit for each of the 10 LEDs
        grovepi.ledBar_setBits(ledbar, state)
        time.sleep(.5)


        print "Test 14) Step"
        # step through all 10 LEDs
        for i in range(0,11):
            grovepi.ledBar_setLevel(ledbar, i)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 15) Bounce"
        # switch on the first two LEDs
        grovepi.ledBar_setLevel(ledbar, 2)

        # get the current state (which is 0x3)
        state = grovepi.ledBar_getBits(ledbar)

        # bounce to the right
        for i in range(0,9):
            # bit shift left and update
            state <<= 1;
            grovepi.ledBar_setBits(ledbar, state)
            time.sleep(.2)

        # bounce to the left
        for i in range(0,9):
            # bit shift right and update
            state >>= 1;
            grovepi.ledBar_setBits(ledbar, state)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 16) Random"
        for i in range(0,21):
            state = random.randint(0,1023)
            grovepi.ledBar_setBits(ledbar, state)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 17) Invert"
        # set every 2nd LED on - 341 or 0x155
        state = 341
        for i in range(0,5):
            grovepi.ledBar_setBits(ledbar, state)
            time.sleep(.2)

            # bitwise XOR all 10 LEDs on with the current state
            state = 0x3FF ^ state

            grovepi.ledBar_setBits(ledbar, state)
            time.sleep(.2)
        time.sleep(.3)


        print "Test 18) Walk through all possible combinations"
        for i in range(0,1024):
            grovepi.ledBar_setBits(ledbar, i)
            time.sleep(.1)
        time.sleep(.4)

    except KeyboardInterrupt:
        grovepi.ledBar_setBits(ledbar, 0)
        break
    except IOError:
        print "Error"

Mer information

http://wiki.seeedstudio.com/Grove-LED_Bar/