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import pic24
NoOperands = [
0xD5, 0xD6, 0xD7, 0xD8,
0xEF, # comment on this one: Read & toss 2 response words
0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB
]
ScriptCommandTable = {
0xB4: 'SCMD_JT2_WAIT_PE_RESP',
0xB5: 'SCMD_JT2_GET_PE_RESP',
0xB6: 'SCMD_JT2_XFERINST_BUF',
0xB7: 'SCMD_JT2_XFRFASTDAT_BUF',
0xB8: 'SCMD_JT2_XFRFASTDAT_LIT',
0xB9: 'SCMD_JT2_XFERDATA32_LIT',
0xBA: 'SCMD_JT2_XFERDATA8_LIT',
0xBB: 'SCMD_JT2_SENDCMD',
0xBC: 'SCMD_JT2_SETMODE',
0xBD: 'SCMD_UNIO_TX_RX',
0xBE: 'SCMD_UNIO_TX',
0xBF: 'SCMD_MEASURE_PULSE',
0xC0: 'SCMD_ICDSLAVE_TX_BUF_BL',
0xC1: 'SCMD_ICDSLAVE_TX_LIT_BL',
0xC2: 'SCMD_ICDSLAVE_RX_BL',
0xC3: 'SCMD_SPI_RDWR_BYTE_BUF',
0xC4: 'SCMD_SPI_RDWR_BYTE_LIT',
0xC5: 'SCMD_SPI_RD_BYTE_BUF',
0xC6: 'SCMD_SPI_WR_BYTE_BUF',
0xC7: 'SCMD_SPI_WR_BYTE_LIT',
0xC8: 'SCMD_I2C_RD_BYTE_NACK',
0xC9: 'SCMD_I2C_RD_BYTE_ACK',
0xCA: 'SCMD_I2C_WR_BYTE_BUF',
0xCB: 'SCMD_I2C_WR_BYTE_LIT',
0xCC: 'SCMD_I2C_STOP',
0xCD: 'SCMD_I2C_START',
0xCE: 'SCMD_AUX_STATE_BUFFER',
0xCF: 'SCMD_SET_AUX',
0xD0: 'SCMD_WRITE_BITS_BUF_HLD',
0xD1: 'SCMD_WRITE_BITS_LIT_HLD',
0xD2: 'SCMD_CONST_WRITE_DL',
0xD3: 'SCMD_WRITE_BUFBYTE_W',
0xD4: 'SCMD_WRITE_BUFWORD_W',
0xD5: 'SCMD_RD2_BITS_BUFFER',
0xD6: 'SCMD_RD2_BYTE_BUFFER',
0xD7: 'SCMD_VISI24',
0xD8: 'SCMD_NOP24',
0xD9: 'SCMD_COREINST24',
0xDA: 'SCMD_COREINST18',
0xDB: 'SCMD_POP_DOWNLOAD',
0xDC: 'SCMD_ICSP_STATES_BUFFER',
0xDD: 'SCMD_LOOP_BUFFER',
0xDE: 'SCMD_ICDSLAVE_TX_BUF',
0xDF: 'SCMD_ICDSLAVE_TX_LIT',
0xE0: 'SCMD_ICDSLAVE_RX',
0xE1: 'SCMD_POKE_SFR',
0xE2: 'SCMD_PEEK_SFR',
0xE3: 'SCMD_EXIT_SCRIPT',
0xE4: 'SCMD_GOTO_INDEX',
0xE5: 'SCMD_IF_GT_GOTO',
0xE6: 'SCMD_IF_EQ_GOTO',
0xE7: 'SCMD_DELAY_SHORT',
0xE8: 'SCMD_DELAY_LONG',
0xE9: 'SCMD_LOOP',
0xEA: 'SCMD_SET_ICSP_SPEED',
0xEB: 'SCMD_READ_BITS',
0xEC: 'SCMD_READ_BITS_BUFFER',
0xED: 'SCMD_WRITE_BITS_BUFFER',
0xEE: 'SCMD_WRITE_BITS_LITERAL',
0xEF: 'SCMD_READ_BYTE',
0xF0: 'SCMD_READ_BYTE_BUFFER',
0xF1: 'SCMD_WRITE_BYTE_BUFFER',
0xF2: 'SCMD_WRITE_BYTE_LITERAL',
0xF3: 'SCMD_SET_ICSP_PINS',
0xF4: 'SCMD_BUSY_LED_OFF',
0xF5: 'SCMD_BUSY_LED_ON',
0xF6: 'SCMD_MCLR_GND_OFF',
0xF7: 'SCMD_MCLR_GND_ON',
0xF8: 'SCMD_VPP_PWM_OFF',
0xF9: 'SCMD_VPP_PWM_ON',
0xFA: 'SCMD_VPP_OFF',
0xFB: 'SCMD_VPP_ON',
0xFC: 'SCMD_VDD_GND_OFF',
0xFD: 'SCMD_VDD_GND_ON',
0xFE: 'SCMD_VDD_OFF',
0xFF: 'SCMD_VDD_ON'
}
def disassemble(blob, offset):
code = blob[offset]
length = 1
command = ScriptCommandTable[code]
result = {}
result['mnemonic'] = command
if code == 0xCF:
length += 1
result['op'] = hex(blob[offset + 1])
elif code == 0xD3 or code == 0xD4:
length += 1
immediate = blob[offset + 1]
elif code == 0xD9:
if blob[offset + 1 + 2] == 0x04:
# it's a goto, and there's a second instruction. this OUGHT to be
# followed by a SCMD_NOP24...
if blob[offset + 1 + 3] == 0xD8:
# it is! whew
instrbytes = blob[offset + 1:offset + 1 + 3]
instrbytes.append(0)
instrbytes.append(0)
instrbytes.append(0)
(postinstr_offset, instr) = pic24.disassemble(instrbytes, 0)
length = 1 + 3 + 1 # the command, three real bytes + the nop
result['op'] = instr #pic24.render(instr)
else:
(postinstr_offset, instr) = pic24.disassemble(blob, offset + 1)
# length = postinstr_offset - offset
length = 4
result['op'] = instr #pic24.render(instr)
print("Goto not followed by nop, uhh what's " + hex(blob[offset + 3 + 1]))
else:
(postinstr_offset, instr) = pic24.disassemble(blob, offset + 1)
length = postinstr_offset - offset
result['op'] = instr #pic24.render(instr)
elif code in NoOperands:
pass
elif code == 0xE7 or code == 0xE8:
length += 1
result['op'] = hex(blob[offset + 1])
elif code == 0xEE:
length += 2
# not sure if this is really two operands
result['op'] = hex(blob[offset + 1]) + ", " + hex(blob[offset + 2])
elif code == 0xE9:
length += 2
result['op'] = hex((blob[offset + 2] << 8) + blob[offset + 1])
elif code == 0xF2:
length += 1
result['op'] = hex(blob[offset + 1])
elif code == 0xF3:
length += 1
result['op'] = hex(blob[offset + 1])
else:
print("Unknown: " + command)
return None
return (offset + length, result)
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