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87 lines
2.0 KiB
87 lines
2.0 KiB
#!/usr/bin/env python |
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''' |
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decode an stm32 ICSR register value |
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''' |
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import sys |
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import optparse |
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def num(s): |
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try: |
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return int(s) |
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except ValueError: |
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return int(s, 16) |
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parser = optparse.OptionParser(__file__) |
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opts, args = parser.parse_args() |
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if len(args) == 0: |
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print(parser.usage) |
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sys.exit(0) |
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ICSR = num(args[0]) |
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# https://www.st.com/content/ccc/resource/technical/document/programming_manual/6c/3a/cb/e7/e4/ea/44/9b/DM00046982.pdf/files/DM00046982.pdf/jcr:content/translations/en.DM00046982.pdf |
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# page 255 |
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def decoder_m4_vectactive(value): |
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exceptions = { |
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0: "Thread mode", |
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1: "Reserved", |
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2: "NMI", |
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3: "Hard fault", |
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4: "Memory management fault", |
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5: "Bus fault", |
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6: "Usage fault", |
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7: "Reserved....", |
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10: "Reserved", |
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11: "SVCall", |
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12: "Reserved for Debug", |
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13: "Reserved", |
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14: "PendSV", |
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15: "SysTick", |
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} |
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if value in exceptions: |
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exception = "%s" % str(exceptions[value]) |
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else: |
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exception = "IRQ%u" % (value - 16) |
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sys.stdout.write(" (%s)" % exception) |
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M4_BITS = [ |
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("0-8", "VECTACTIVE", decoder_m4_vectactive), |
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("9-10", "RESERVED1", None), |
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("11", "ROTOBASE", None), |
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("12-18", "VECTPENDING", None), |
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("19-21", "RESERVED2", None), |
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("22", "ISRPENDING", None), |
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("23-24", "RESERVED3", None), |
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("25", "PENDSTCLR", None), |
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("27", "PENDSVCLR", None), |
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("28", "PENDSVSET", None), |
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("29-30", "RESERVED4", None), |
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("31", "NMIPENDSET", None), |
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] |
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for bit in M4_BITS: |
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(bits, name, decoder) = bit |
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if "-" in bits: |
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(start_bit, stop_bit) = bits.split("-") |
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start_bit = int(start_bit) |
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stop_bit = int(stop_bit) |
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else: |
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start_bit = int(bits) |
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stop_bit = int(bits) |
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mask = 0 |
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for i in range(start_bit, stop_bit+1): |
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mask |= (1 << i) |
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value = (ICSR & mask) >> start_bit |
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sys.stdout.write("%s: %u" % (name, value)), |
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if decoder is not None: |
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decoder(value) |
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print("")
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