7u83/stcgal
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge a414bfb864 into ff9530833d

Browse Source
This commit is contained in:
Grigori Goronzy 2017-10-14 18:08:52 +00:00 committed by GitHub
commit c60b476fef
1 changed files with 21 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
stcgal/protocols.py
View File

@ -238,6 +238,20 @@ class StcBaseProtocol:
return iap_wait
def delay_safely_written(self, length):
"""
Delay until data has been safely written and sent to device.
Some buggy serial drivers don't implement tcdrain/flush correctly.
That is, they wait until all data has been written to USB, but they
do not wait until the data has actually finished transmission.
Add additional delay to work around.
"""
bit_time = 1.0 / self.ser.baudrate
byte_time = bit_time * 11.0 # start, 8 data bits, stop, parity
clock_safety_factor = 2.5 # additional delay in case clock is slow
time.sleep(byte_time * length * clock_safety_factor)
def set_option(self, name, value):
self.options.set_option(name, value)
@ -448,7 +462,7 @@ class Stc89Protocol(StcBaseProtocol):
packet += struct.pack(">H", brt)
packet += bytes([0xff - (brt >> 8), brt_csum, delay, iap])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
self.ser.baudrate = self.baud_handshake
@ -462,7 +476,7 @@ class Stc89Protocol(StcBaseProtocol):
packet += struct.pack(">H", brt)
packet += bytes([0xff - (brt >> 8), brt_csum, delay])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
if response[0] != 0x8e:
@ -638,7 +652,7 @@ class Stc12AProtocol(Stc12AOptionsMixIn, Stc89Protocol):
sys.stdout.flush()
packet = bytes([0x8f, 0xc0, brt, 0x3f, brt_csum, delay, iap])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
self.ser.baudrate = self.baud_handshake
@ -650,7 +664,7 @@ class Stc12AProtocol(Stc12AOptionsMixIn, Stc89Protocol):
sys.stdout.flush()
packet = bytes([0x8e, 0xc0, brt, 0x3f, brt_csum, delay])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
if response[0] != 0x8e:
@ -835,7 +849,7 @@ class Stc12BaseProtocol(StcBaseProtocol):
sys.stdout.flush()
packet = bytes([0x8f, 0xc0, brt, 0x3f, brt_csum, delay, iap])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
self.ser.baudrate = self.baud_handshake
@ -847,7 +861,7 @@ class Stc12BaseProtocol(StcBaseProtocol):
sys.stdout.flush()
packet = bytes([0x8e, 0xc0, brt, 0x3f, brt_csum, delay])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
if response[0] != 0x84:
@ -1121,7 +1135,7 @@ class Stc15AProtocol(Stc12Protocol):
packet += struct.pack(">B", 230400 // self.baud_transfer)
packet += bytes([0xa1, 0x64, 0xb8, 0x00, iap_wait, 0x20, 0xff, 0x00])
self.write_packet(packet)
time.sleep(0.2)
self.delay_safely_written(len(packet))
self.ser.baudrate = self.baud_transfer
response = self.read_packet()
if response[0] != 0x84:
@ -1307,7 +1321,6 @@ class Stc15Protocol(Stc15AProtocol):
response = self.read_packet()
if response[0] != 0x01:
raise StcProtocolException("incorrect magic in handshake packet")
time.sleep(0.2)
self.ser.baudrate = self.baud_transfer
def switch_baud_ext(self):
@ -1324,7 +1337,6 @@ class Stc15Protocol(Stc15AProtocol):
response = self.read_packet()
if response[0] != 0x01:
raise StcProtocolException("incorrect magic in handshake packet")
time.sleep(0.2)
self.ser.baudrate = self.baud_transfer
# for switching back to RC, program factory values