import mraa as m


class SpiSerial():
    def __init__(self):
        self.cs0 = m.Gpio(23)
        self.cs0.dir(m.DIR_OUT)
        self.cs0.write(1)

        self.dev = m.spiFromDesc("spi-raw-5-1")
        self.dev.frequency(62500)
        self.dev.mode(m.SPI_MODE0)
        self.dev.bitPerWord(8)
        self.timeout = 0
        self.rx_buf = []

    def spi_xfer(self, b):
        tx = bytearray(1)
        tx[0] = (int('{:08b}'.format(b)[::-1], 2))
        self.cs0.write(0)
        rxbuf = self.dev.write(tx)
        self.cs0.write(1)
        return (int('{:08b}'.format(rxbuf[0])[::-1], 2))

    def close(self):
        pass

    def write(self, tx_bytes):
        tx_bytes = bytearray(tx_bytes)
        self.spi_xfer(0x99)
        num_rxd = self.spi_xfer(len(tx_bytes))
        for y in range(0, len(tx_bytes)):
            rx = self.spi_xfer(tx_bytes[y])
            if num_rxd > 0:
                self.rx_buf.append(rx)
                num_rxd -= 1
        for y in range(0, num_rxd):
            rx = self.spi_xfer(0)
            self.rx_buf.append(rx)

    def read(self, num_bytes=0):
        if num_bytes == 0:
            num_bytes = len(self.rx_buf)
        ret_val = self.rx_buf[0:num_bytes]
        del(self.rx_buf[0:num_bytes])
        return ret_val

    def inWaiting(self):
        self.spi_xfer(0x99)
        num_rxd = self.spi_xfer(0)
        for y in range(0, num_rxd):
            rx = self.spi_xfer(0)
            self.rx_buf.append(rx)
        return len(self.rx_buf)

	def reset(self):
		self.RST = m.Gpio(36)
        self.RST.dir(m.DIR_OUT)
        self.RST.write(1)	
@@ -1492,17 +1492,20 @@
 x_buf)%0A%0A
-%09
+    
 def rese
@@ -1517,10 +1517,16 @@
 f):%0A
-%09%09
+        
 self
@@ -1604,5 +1604,5 @@
 e(1)
-%09
+%0A

fix tabs