mirror of
https://github.com/OpenVoiceOS/OpenVoiceOS
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210 lines
6.7 KiB
Python
210 lines
6.7 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2019-2020, XMOS Ltd, All rights reserved
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# requires dtparam=spi=on in /boot/config.txt
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"""
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This script configures the XVF3510 board in boot from SPI slave and load a
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binary file. It requires a bin file as input parameter.
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"""
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import sys
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import os
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import time
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import argparse
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import spidev
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import RPi.GPIO as GPIO
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from smbus import SMBus
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from pathlib import Path
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if sys.version[0] != '3':
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print("Run this script with Python 3")
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sys.exit(1)
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def bit_reversed_byte(byte_to_reverse):
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"""
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Function to reverse the bit-order of a byte
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Args:
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byte_to_reverse: byte to process
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Retruns:
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byte in reversed order
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"""
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return int('{:08b}'.format(byte_to_reverse)[::-1], 2)
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def set_boot_sel():
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"""
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Function to set XVF3510 board in SPI slave boot mode
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Args:
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None
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Returns:
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None
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"""
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bus = SMBus(1)
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# reset BOOT_SEL
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bus.write_byte_data(0x20, 3, 0xFE)
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bus.write_byte_data(0x20, 7, 0xFF)
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state = {}
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for i in [2, 6]:
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state[i] = bus.read_byte_data(0x20, i)
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# start reset
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data_to_write = 0x00 | (state[2] & 0xDF)
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bus.write_byte_data(0x20, 2, data_to_write)
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data_to_write = 0x00 | (state[6] & 0xDF)
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bus.write_byte_data(0x20, 6, data_to_write)
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# set BOOT_SEL high
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data_to_write = 0x01
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bus.write_byte_data(0x20, 3, data_to_write)
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data_to_write = 0xFE
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bus.write_byte_data(0x20, 7, data_to_write)
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# stop reset
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data_to_write = 0x20 | (state[2] & 0xDF)
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bus.write_byte_data(0x20, 2, data_to_write)
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data_to_write = 0x20 | (state[6] & 0xDF)
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bus.write_byte_data(0x20, 6, data_to_write)
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def send_image(bin_filename, verbose=False, max_spi_speed_mhz = 5, block_transfer_pause_ms = 1, direct = False, delay = False):
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"""
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Function to send the given image to the device via SPI slave
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Args:
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bin_filename: binary file containing the image to boot
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verbose: flag to print debug printouts
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direct: Use Pi GPIO outputs rather than the XVF3510 Pi HAT
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delay: Release BootSel early to delay startup on version 4.0.0 onwards
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Returns:
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None
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"""
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if direct:
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#setup GPIO
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GPIO.setmode(GPIO.BOARD)
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GPIO.setwarnings(False)
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#boot_sel = 8
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#rst_n = 10
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'''
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Mycroft board update
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'''
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#GPIO.setmode(GPIO.BCM)
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boot_sel = 37 #26 #= 25 # fix these numbers to be Wiring Pi
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rst_n = 13 #27 #= 2
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GPIO.setup(boot_sel, GPIO.IN) # Normally, the Pi should not drive this
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GPIO.setup(rst_n, GPIO.OUT, initial=GPIO.HIGH)
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#setup SPI
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spi = spidev.SpiDev()
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bus_spi = 0
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device = 0
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spi.open(bus_spi, device)
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#SPI Settings
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spi.max_speed_hz = int(max_spi_speed_mhz * 1000000)
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spi.mode = 0b00 #XMOS supports 00 or 11
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spi_block_size = 4096 #Limitation in spidev and xfer2 doesn't work!
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if direct:
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GPIO.output(rst_n, 0)
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GPIO.setup(boot_sel, GPIO.OUT, initial=GPIO.HIGH)
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GPIO.output(rst_n, 1)
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else:
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set_boot_sel()
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# Create a table to map byte values to their bit-reversed values
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reverse_table = [bit_reversed_byte(byte) for byte in range(256)]
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data = []
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with open(bin_filename, "rb") as f:
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bytes_read = f.read()
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data = list(bytes_read)
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binary_size = len(data)
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block_count = 0
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print('Read file "{0}" size: {1} Bytes'.format(args.bin_filename, binary_size))
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if binary_size % spi_block_size != 0:
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print("Warning - binary file not a multiple of {} - {} remainder".format( \
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spi_block_size, binary_size % spi_block_size))
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while binary_size > 0:
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block = [reverse_table[byte] for byte in data[:spi_block_size]]
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del data[:spi_block_size]
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binary_size = len(data)
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if verbose:
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print("Sending {} Bytes in block {} checksum 0x{:X}".format( \
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len(block), block_count, sum(block)))
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spi.xfer(block)
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if block_count == 0:
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#Long delay for PLL reboot
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time.sleep(0.1)
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if delay:
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# release boot_sel early to prevent startup
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if direct:
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GPIO.setup(boot_sel, GPIO.IN)
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else:
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#bus = smbus.SMBus(1)
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bus = SMBus(1)
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data_to_write = 0xFE
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bus.write_byte_data(0x20, 3, data_to_write)
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data_to_write = 0xFF
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bus.write_byte_data(0x20, 7, data_to_write)
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elif binary_size > 0:
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time.sleep(block_transfer_pause_ms / 1000)
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block_count += 1
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print("Sending complete")
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if direct:
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GPIO.setup(boot_sel, GPIO.IN) # Once booted, the Pi should not need to drive boot_sel
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GPIO.setup(rst_n, GPIO.OUT, initial=GPIO.HIGH) # Once booted, the Pi should not need to drive reset
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#GPIO.cleanup()
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else:
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#bus = smbus.SMBus(1)
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bus = SMBus(1)
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# reset BOOT_SEL
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data_to_write = 0xFE
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bus.write_byte_data(0x20, 3, data_to_write)
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data_to_write = 0xFF
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bus.write_byte_data(0x20, 7, data_to_write)
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if __name__ == "__main__":
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start_time = time.time()
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parser = argparse.ArgumentParser(description='Load an image via SPI slave from an RPi')
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parser.add_argument('bin_filename', help='binary file name')
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parser.add_argument('--direct', action='store_true', \
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help='Use just direct GPIO outputs rather than using the XVF3510 Development Kit Pi HAT')
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parser.add_argument('--delay', action='store_true', \
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help='Delay xvf3510 device start. Release the BootSel pin early to prevent the XVF3510 (V4.0.0 onwards) from starting with the default I2S configuration. This gives AP a chance to configure and start the XVF3510 device.')
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parser.add_argument('--max-spi-speed-mhz', type=float, default=5, \
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help='Max SPI speed in MHz')
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parser.add_argument('--block-transfer-pause-ms', type=float, default=1, \
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help='pause between SPI transfers in milliseconds, default 1ms')
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parser.add_argument('--verbose', action='store_true', \
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help='print debug information')
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args = parser.parse_args()
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if not Path(args.bin_filename).is_file():
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print("Error: input file {} not found".format(args.bin_filename))
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exit(1)
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send_image(args.bin_filename, args.verbose, args.max_spi_speed_mhz, args.block_transfer_pause_ms, args.direct, args.delay)
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end_time = time.time()
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if args.verbose:
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print("Sending image took {:.3} seconds".format(end_time - start_time))
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