def init(self, frequency = 1000000):
# connect to DAP, check for SWD or JTAG
self.mode = dapConnect(self.interface)
# set clock frequency
dapSWJClock(self.interface, frequency)
# configure transfer
dapTransferConfigure(self.interface)
if (self.mode == DAP_MODE_SWD):
# configure swd protocol
dapSWDConfigure(self.interface)
# switch from jtag to swd
JTAG2SWD(self.interface)
# read ID code
logging.info('IDCODE: 0x%X', self.readDP(DP_REG['IDCODE']))
# clear errors
dapWriteAbort(self.interface, 0x1e);
elif (self.mode == DAP_MODE_JTAG):
# configure jtag protocol
dapJTAGConfigure(self.interface, 4)
# Test logic reset, run test idle
dapSWJSequence(self.interface, [0x1F])
# read ID code
logging.info('IDCODE: 0x%X', dapJTAGIDCode(self.interface))
# clear errors
self.writeDP(DP_REG['CTRL_STAT'], CTRLSTAT_STICKYERR | CTRLSTAT_STICKYCMP | CTRLSTAT_STICKYORUN)
return
def init(self, frequency=1000000):
# connect to DAP, check for SWD or JTAG
self.mode = dapConnect(self.interface)
# set clock frequency
dapSWJClock(self.interface, frequency)
# configure transfer
dapTransferConfigure(self.interface)
if (self.mode == DAP_MODE_SWD):
# configure swd protocol
dapSWDConfigure(self.interface)
# switch from jtag to swd
JTAG2SWD(self.interface)
# read ID code
logging.info('IDCODE: 0x%X', self.readDP(DP_REG['IDCODE']))
# clear errors
dapWriteAbort(self.interface, 0x1e)
elif (self.mode == DAP_MODE_JTAG):
# configure jtag protocol
dapJTAGConfigure(self.interface, 4)
# Test logic reset, run test idle
dapSWJSequence(self.interface, [0x1F])
# read ID code
logging.info('IDCODE: 0x%X', dapJTAGIDCode(self.interface))
# clear errors
self.writeDP(
DP_REG['CTRL_STAT'],
CTRLSTAT_STICKYERR | CTRLSTAT_STICKYCMP | CTRLSTAT_STICKYORUN)
return
def JTAG2SWD(interface):
data = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
dapSWJSequence(interface, data)
data = [0x9e, 0xe7]
dapSWJSequence(interface, data)
data = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
dapSWJSequence(interface, data)
data = [0x00]
dapSWJSequence(interface, data)
def JTAG2SWD(interface):
data = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
dapSWJSequence(interface, data)
data = [0x9e, 0xe7]
dapSWJSequence(interface, data)
data = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
dapSWJSequence(interface, data)
data = [0x00]
dapSWJSequence(interface, data)
def JTAG2SWD(interface):
data = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
dapSWJSequence(interface, data)
data = [0x9E, 0xE7]
dapSWJSequence(interface, data)
data = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]
dapSWJSequence(interface, data)
data = [0x00]
dapSWJSequence(interface, data)