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Jaime van Kessel 2015-03-31 10:40:21 +02:00
parent 9d889cf2db
commit 3fa02d3710
6 changed files with 289 additions and 286 deletions
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94
avr_isp/ispBase.py
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@ -4,60 +4,60 @@ The ISP AVR programmer can load firmware into AVR chips. Which are commonly used
Needs to be subclassed to support different programmers.
Currently only the stk500v2 subclass exists.
This is a python 3 conversion of the code created by David Braam for the Cura project.
"""
__copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
from . import chipDB
class IspBase():
"""
Base class for ISP based AVR programmers.
Functions in this class raise an IspError when something goes wrong.
"""
def programChip(self, flashData):
""" Program a chip with the given flash data. """
self.curExtAddr = -1
self.chip = chipDB.getChipFromDB(self.getSignature())
if not self.chip:
raise IspError("Chip with signature: " + str(self.getSignature()) + "not found")
self.chipErase()
print("Flashing %i bytes" % len(flashData))
self.writeFlash(flashData)
print("Verifying %i bytes" % len(flashData))
self.verifyFlash(flashData)
"""
Base class for ISP based AVR programmers.
Functions in this class raise an IspError when something goes wrong.
"""
def programChip(self, flashData):
""" Program a chip with the given flash data. """
self.curExtAddr = -1
self.chip = chipDB.getChipFromDB(self.getSignature())
if not self.chip:
raise IspError("Chip with signature: " + str(self.getSignature()) + "not found")
self.chipErase()
print("Flashing %i bytes" % len(flashData))
self.writeFlash(flashData)
print("Verifying %i bytes" % len(flashData))
self.verifyFlash(flashData)
def getSignature(self):
"""
Get the AVR signature from the chip. This is a 3 byte array which describes which chip we are connected to.
This is important to verify that we are programming the correct type of chip and that we use proper flash block sizes.
"""
sig = []
sig.append(self.sendISP([0x30, 0x00, 0x00, 0x00])[3])
sig.append(self.sendISP([0x30, 0x00, 0x01, 0x00])[3])
sig.append(self.sendISP([0x30, 0x00, 0x02, 0x00])[3])
return sig
def chipErase(self):
"""
Do a full chip erase, clears all data, and lockbits.
"""
self.sendISP([0xAC, 0x80, 0x00, 0x00])
def getSignature(self):
"""
Get the AVR signature from the chip. This is a 3 byte array which describes which chip we are connected to.
This is important to verify that we are programming the correct type of chip and that we use proper flash block sizes.
"""
sig = []
sig.append(self.sendISP([0x30, 0x00, 0x00, 0x00])[3])
sig.append(self.sendISP([0x30, 0x00, 0x01, 0x00])[3])
sig.append(self.sendISP([0x30, 0x00, 0x02, 0x00])[3])
return sig
def writeFlash(self, flashData):
"""
Write the flash data, needs to be implemented in a subclass.
"""
raise IspError("Called undefined writeFlash")
def chipErase(self):
"""
Do a full chip erase, clears all data, and lockbits.
"""
self.sendISP([0xAC, 0x80, 0x00, 0x00])
def verifyFlash(self, flashData):
"""
Verify the flash data, needs to be implemented in a subclass.
"""
raise IspError("Called undefined verifyFlash")
def writeFlash(self, flashData):
"""
Write the flash data, needs to be implemented in a subclass.
"""
raise IspError("Called undefined writeFlash")
def verifyFlash(self, flashData):
"""
Verify the flash data, needs to be implemented in a subclass.
"""
raise IspError("Called undefined verifyFlash")
class IspError():
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)