def purgeBuffers(self):
""" Purge ftdi buffers
"""
err = ftdi.ftdi_usb_purge_buffers(self.__ftdic)
if err < 0:
self._log.error("Can't purge buffers (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
raise FtdiError("Can't purge buffers (%d, %s)" % (err, ftdi.ftdi_get_error_string(self.__ftdic)))
def __init__(self):
# open channel A
self.ft_ctx = ftdi.ftdi_context()
if ftdi.ftdi_init(self.ft_ctx) < 0:
raise RuntimeError("ftdi_init failed")
ftdi.ftdi_set_interface(self.ft_ctx, ftdi.INTERFACE_A)
if ftdi.ftdi_usb_open(self.ft_ctx, 0x0403, 0x6010) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(self.ft_ctx))
try:
# open and purge channel B
ft_ctx_b = ftdi.ftdi_context()
if ftdi.ftdi_init(ft_ctx_b) < 0:
raise RuntimeError("ftdi_init failed")
ftdi.ftdi_set_interface(ft_ctx_b, ftdi.INTERFACE_B)
if ftdi.ftdi_usb_open(ft_ctx_b, 0x0403, 0x6010) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(ft_ctx_b))
# purge buffers
if ftdi.ftdi_usb_purge_buffers(ft_ctx_b) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(ft_ctx_b))
# close channel B
ftdi.ftdi_usb_close(ft_ctx_b)
ftdi.ftdi_deinit(ft_ctx_b)
except RuntimeError:
self.close()
raise
# setup FIFO mode
try:
self.ft_ctx.usb_read_timeout = 5000000
self.ft_ctx.usb_write_timeout = 5000000
ftdi.ftdi_read_data_set_chunksize(self.ft_ctx, self.READ_CHUNKSIZE)
ftdi.ftdi_write_data_set_chunksize(self.ft_ctx,
self.WRITE_CHUNKSIZE)
if ftdi.ftdi_usb_reset(self.ft_ctx) != 0:
raise RuntimeError("Reset failed")
time.sleep(100e-3)
if ftdi.ftdi_set_bitmode(self.ft_ctx, 0, ftdi.BITMODE_SYNCFF) != 0:
raise RuntimeError("Setting FIFO mode failed")
if ftdi.ftdi_set_latency_timer(self.ft_ctx, 1) != 0:
raise RuntimeError("Setting latency failed")
except RuntimeError:
self.close()
raise
def __init__(self):
# open channel A
self.ft_ctx = ftdi.ftdi_context()
if ftdi.ftdi_init(self.ft_ctx) < 0:
raise RuntimeError("ftdi_init failed")
ftdi.ftdi_set_interface(self.ft_ctx, ftdi.INTERFACE_A)
if ftdi.ftdi_usb_open(self.ft_ctx, 0x0403, 0x6010) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(self.ft_ctx))
try:
# open and purge channel B
ft_ctx_b = ftdi.ftdi_context()
if ftdi.ftdi_init(ft_ctx_b) < 0:
raise RuntimeError("ftdi_init failed")
ftdi.ftdi_set_interface(ft_ctx_b, ftdi.INTERFACE_B)
if ftdi.ftdi_usb_open(ft_ctx_b, 0x0403, 0x6010) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(ft_ctx_b))
# purge buffers
if ftdi.ftdi_usb_purge_buffers(ft_ctx_b) != 0:
raise RuntimeError(ftdi.ftdi_get_error_string(ft_ctx_b))
# close channel B
ftdi.ftdi_usb_close(ft_ctx_b)
ftdi.ftdi_deinit(ft_ctx_b)
except RuntimeError:
self.close()
raise
# setup FIFO mode
try:
self.ft_ctx.usb_read_timeout = 5000000;
self.ft_ctx.usb_write_timeout = 5000000;
ftdi.ftdi_read_data_set_chunksize(self.ft_ctx, self.READ_CHUNKSIZE)
ftdi.ftdi_write_data_set_chunksize(self.ft_ctx, self.WRITE_CHUNKSIZE)
if ftdi.ftdi_usb_reset(self.ft_ctx) != 0:
raise RuntimeError("Reset failed")
time.sleep(100e-3)
if ftdi.ftdi_set_bitmode(self.ft_ctx, 0, ftdi.BITMODE_SYNCFF) != 0:
raise RuntimeError("Setting FIFO mode failed")
if ftdi.ftdi_set_latency_timer(self.ft_ctx, 1) != 0:
raise RuntimeError("Setting latency failed")
except RuntimeError:
self.close()
raise