40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
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import wiringpi
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import argparse
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parser = argparse.ArgumentParser(description='')
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parser.add_argument("--channel", type=int, default=1, help='specify the spi channel')
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parser.add_argument("--port", type=int, default=0, help='specify the spi port')
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parser.add_argument("--speed", type=int, default=500000, help='specify the spi speed')
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parser.add_argument("--mode", type=int, default=0, help='specify the spi mode')
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args = parser.parse_args()
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default_tx = [
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xF0, 0x0D,
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]
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def hexdump(src, line_size, prefix):
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result = []
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digits = 4 if isinstance(src, str) else 2
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for i in range(0, len(src), line_size):
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s = src[i:i + line_size]
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hexa = ' '.join([hex(x)[2:].upper().zfill(digits) for x in s])
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text = ''.join([chr(x) if 0x20 <= x < 0x7F else '.' for x in s])
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result.append(prefix + ' | ' + hexa.ljust(line_size * (digits + 1)) + ' |' + "{0}".format(text) + '|')
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return '\n'.join(result)
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print("spi mode: 0x%x" % args.mode);
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print("max speed: %d Hz (%d KHz)\n" %(args.speed, args.speed / 1000), end='');
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wiringpi.wiringPiSPISetupMode(args.channel, args.port, args.speed, args.mode)
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revlen, recvData = wiringpi.wiringPiSPIDataRW(args.channel, bytes(default_tx))
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print(hexdump(bytes(default_tx), 32, "TX"))
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print(hexdump(bytes(recvData), 32, "RX"))
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