class BitBangController(object):
DONE_PIN = 0x10
PROGRAM_PIN = 0x40
SOFT_RESET_PIN = 0x80
def __init__(self, vendor_id, product_id, interface, debug = False):
self.vendor = vendor_id
self.product = product_id
self.interface = interface
self.f = Ftdi()
self.debug = True
self.f.open_bitbang(vendor_id, product_id, interface)
def hiz(self):
pass
def is_in_bitbang(self):
return self.f.bitbang_enabled()
def read_pins(self):
return self.f.read_pins()
def read_program_pin(self):
return (self.PROGAM_PIN & self.f.read_pins() > 0)
def read_soft_reset_pin(self):
return (self.SOFT_RESET_PIN & self.f.read_pins() > 0)
def read_done_pin(self):
return (self.DONE_PIN & self.f.read_pins() > 0)
def wait_for_done(self):
while not self.read_done_pin():
print ".",
time.sleep(200)
print "Done"
def soft_reset_high(self):
pins = self.f.read_pins()
pins |= self.SOFT_RESET_PIN
self.f.write_data(Array('B', [0x01, pins]))
def soft_reset_low(self):
pins = self.f.read_pins()
pins &= ~(self.SOFT_RESET_PIN)
self.f.write_data(Array('B', [0x00, pins]))
def program_high(self):
pins = self.f.read_pins()
pins |= self.PROGRAM_PIN
self.f.write_data(Array('B', [0x01, pins]))
def program_low(self):
pins = self.f.read_pins()
pins &= ~(self.PROGRAM_PIN)
self.f.write_data(Array('B', [0x00, pins]))
def set_soft_reset_to_output(self):
pin_dir = self.SOFT_RESET_PIN
self.f.open_bitbang(self.vendor,
self.product,
self.interface,
direction = pin_dir)
def set_program_pin_to_output(self):
pin_dir = self.PROGRAM_PIN
self.f.open_bitbang(self.vendor,
self.product,
self.interface,
direction = pin_dir)
def set_pins_to_input(self):
self.f.open_bitbang(self.vendor,
self.product,
self.interface,
direction = 0x00)
def set_pins_to_output(self):
self.f.open_bitbang(self.vendor,
self.product,
self.interface,
direction = 0xFF)
def pins_on(self):
"""
Set all pins high
"""
self.f.write_data(Array('B', [0x01, 0xFF]))
def pins_off(self):
"""
Set all pins low
"""
self.f.write_data(Array('B', [0x01, 0x00]))
