ledbits.py 文件源码

def showQR(addr, errcorr):
    # generate QR code and display on LED grid
    code = pyqrcode.create(addr, error=errcorr, version=3)
    t = code.text(1)

    row = 31
    col = 0
    bufferInit()
    for i in t:
        if i != '\n':
            bufferPixel(row, col, 255-int(i)*255, 255-int(i)*255, 255-int(i)*255)
            col += 1
        else:
            row -= 1
            col = 0
            bufferDraw()
            #time.sleep(0.001)

    # give us a chance to scan it
    time.sleep(QRTIME)


# draw blocks since last difficulty adjustment