153 lines
4.4 KiB
Python
Executable File
153 lines
4.4 KiB
Python
Executable File
#!/usr/bin/env python3
|
||
"""
|
||
OpenOCD RPC example, covered by GNU GPLv3 or later
|
||
Copyright (C) 2014 Andreas Ortmann (ortmann@finf.uni-hannover.de)
|
||
|
||
|
||
Example output:
|
||
./ocd_rpc_example.py
|
||
echo says hi!
|
||
|
||
target state: halted
|
||
target halted due to debug-request, current mode: Thread
|
||
xPSR: 0x01000000 pc: 0x00000188 msp: 0x10000fd8
|
||
|
||
variable @ 0x10000000: 0x01c9c380
|
||
|
||
variable @ 0x10000000: 0xdeadc0de
|
||
|
||
memory (before): ['0xdeadc0de', '0x00000011', '0xaaaaaaaa', '0x00000023',
|
||
'0x00000042', '0x0000ffff']
|
||
|
||
memory (after): ['0x00000001', '0x00000000', '0xaaaaaaaa', '0x00000023',
|
||
'0x00000042', '0x0000ffff']
|
||
"""
|
||
|
||
import socket
|
||
import itertools
|
||
|
||
def strToHex(data):
|
||
return map(strToHex, data) if isinstance(data, list) else int(data, 16)
|
||
|
||
def hexify(data):
|
||
return "<None>" if data is None else ("0x%08x" % data)
|
||
|
||
def compareData(a, b):
|
||
for i, j, num in zip(a, b, itertools.count(0)):
|
||
if i != j:
|
||
print("difference at %d: %s != %s" % (num, hexify(i), hexify(j)))
|
||
|
||
|
||
class OpenOcd:
|
||
COMMAND_TOKEN = '\x1a'
|
||
def __init__(self, verbose=False):
|
||
self.verbose = verbose
|
||
self.tclRpcIp = "127.0.0.1"
|
||
self.tclRpcPort = 6666
|
||
self.bufferSize = 4096
|
||
|
||
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||
|
||
def __enter__(self):
|
||
self.connect()
|
||
return self
|
||
|
||
def __exit__(self, type, value, traceback):
|
||
self.disconnect()
|
||
|
||
def connect(self):
|
||
self.sock.connect((self.tclRpcIp, self.tclRpcPort))
|
||
|
||
def disconnect(self):
|
||
try:
|
||
self.send("exit")
|
||
finally:
|
||
self.sock.close()
|
||
|
||
def send(self, cmd):
|
||
"""Send a command string to TCL RPC. Return the result that was read."""
|
||
data = (cmd + OpenOcd.COMMAND_TOKEN).encode("utf-8")
|
||
if self.verbose:
|
||
print("<- ", data)
|
||
|
||
self.sock.send(data)
|
||
return self._recv()
|
||
|
||
def _recv(self):
|
||
"""Read from the stream until the token (\x1a) was received."""
|
||
data = bytes()
|
||
while True:
|
||
chunk = self.sock.recv(self.bufferSize)
|
||
data += chunk
|
||
if bytes(OpenOcd.COMMAND_TOKEN, encoding="utf-8") in chunk:
|
||
break
|
||
|
||
if self.verbose:
|
||
print("-> ", data)
|
||
|
||
data = data.decode("utf-8").strip()
|
||
data = data[:-1] # strip trailing \x1a
|
||
|
||
return data
|
||
|
||
def readVariable(self, address):
|
||
raw = self.send("mdw 0x%x" % address).split(": ")
|
||
return None if (len(raw) < 2) else strToHex(raw[1])
|
||
|
||
def readMemory(self, wordLen, address, n):
|
||
self.send("array unset output") # better to clear the array before
|
||
self.send("mem2array output %d 0x%x %d" % (wordLen, address, n))
|
||
|
||
output = [*map(int, self.send("return $output").split(" "))]
|
||
d = dict([tuple(output[i:i + 2]) for i in range(0, len(output), 2)])
|
||
|
||
return [d[k] for k in sorted(d.keys())]
|
||
|
||
def writeVariable(self, address, value):
|
||
assert value is not None
|
||
self.send("mww 0x%x 0x%x" % (address, value))
|
||
|
||
def writeMemory(self, wordLen, address, n, data):
|
||
array = " ".join(["%d 0x%x" % (a, b) for a, b in enumerate(data)])
|
||
|
||
self.send("array unset 1986ве1т") # better to clear the array before
|
||
self.send("array set 1986ве1т { %s }" % array)
|
||
self.send("array2mem 1986ве1т 0x%x %s %d" % (wordLen, address, n))
|
||
|
||
if __name__ == "__main__":
|
||
|
||
def show(*args):
|
||
print(*args, end="\n\n")
|
||
|
||
with OpenOcd() as ocd:
|
||
ocd.send("reset")
|
||
|
||
show(ocd.send("capture { echo \"echo says hi!\" }")[:-1])
|
||
show(ocd.send("capture \"halt\"")[:-1])
|
||
|
||
# Read the first few words at the RAM region (put starting adress of RAM
|
||
# region into 'addr')
|
||
addr = 0x10000000
|
||
|
||
value = ocd.readVariable(addr)
|
||
show("variable @ %s: %s" % (hexify(addr), hexify(value)))
|
||
|
||
ocd.writeVariable(addr, 0xdeadc0de)
|
||
show("variable @ %s: %s" % (hexify(addr), hexify(ocd.readVariable(addr))))
|
||
|
||
data = [1, 0, 0xaaaaaaaa, 0x23, 0x42, 0xffff]
|
||
wordlen = 32
|
||
n = len(data)
|
||
|
||
read = ocd.readMemory(wordlen, addr, n)
|
||
show("memory (before):", list(map(hexify, read)))
|
||
|
||
ocd.writeMemory(wordlen, addr, n, data)
|
||
|
||
read = ocd.readMemory(wordlen, addr, n)
|
||
show("memory (after):", list(map(hexify, read)))
|
||
|
||
compareData(read, data)
|
||
|
||
ocd.send("resume")
|