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+# Python LT8900 via SPI
+
+This Python module enables a Python to talk to an LT8900 radio attached to an serial peripheral interface (SPI).
+
+## API
+### Synopsis
+
+    lt8900_spi.radio(spi_bus, spi_dev, config = None) -> instance
+    lt8900_spi.radio.put_register(reg, value) -> value
+    lt8900_spi.radio.put_register_bits(reg, bits_dict) -> value
+    lt8900_spi.radio.get_register(reg) -> value
+    lt8900_spi.radio.get_register_bits(reg, value = None) -> dictionary
+    lt8900_spi.radio.configure(config) -> None
+    lt8900_spi.radio.initialize() -> boolean
+    lt8900_spi.radio.set_channel(channel) -> dictionary
+    lt8900_spi.radio.set_syncword(syncword) -> None
+    lt8900_spi.radio.fill_fifo(message, include_length = True) -> list
+    lt8900_spi.radio.transmit(message, channel = None) -> boolean
+    lt8900_spi.radio.multi_transmit(message, channels, retries = 3, delay = 0.1) -> boolean
+    lt8900_spi.radio.start_listening(channel) -> boolean
+    lt8900_spi.radio.stop_listening() -> boolean
+    lt8900_spi.radio.receive(channel = None, wait = False, length = None, wait_time = 0.1) -> list
+
+### instance.get\_register\_bits
+
+Low-level primitive to get a named register with bitfields expanded to names.
+
+### instance.put\_register\_bits
+
+Low-level primitive to set a named register by bitfield value.
+
+### instance.set\_syncword
+
+High-level interface to syncword mechanism.  The syncword can be 1, 2, 3, or 4 16-bit words long and should be provided as an array.
+
+Example:
+
+    instance.set_syncword([1, 2, 3, 4])
+
+### instance.transmit
+
+Transmit a message.  If a channel is specified transmit on that channel -- otherwise the current channel is queried and then used.
+
+### instance.multi\_transmit
+
+Transmit a message across multiple channels multiple times.  This is a common pattern so this function is provided for convience.
+
+## Example
+
+    #! /usr/bin/env python3
+    
+    import time
+
+    import gpiozero
+    import lt8900_spi
+    
+    # Need to keep this attached to drive the line high -- if the object disappears then
+    # the GPIO port gets reconfigured as an input port
+    # Note broadcom pin numbers are used
+    reset_gpio = gpiozero.LED(24)
+    reset_gpio.on()
+    def reset_module_via_gpio():    
+    	reset_gpio.off()
+    	time.sleep(0.1)
+    	reset_gpio.on()
+    	time.sleep(0.1)
+
+    radio = lt8900_spi.radio(0, 0, {
+    	'reset_command': reset_module_via_gpio
+    })
+    
+    if not radio.initialize():
+    	raise ValueError('Initialize failed')
+
+    radio.set_syncword([0x258B, 0x147A])
+
+    radio.multi_transmit([0xB0, 0x51, 0xF0, 0x00, 0x00, 0x01, 212], [9, 40, 71], delay = 0.5)