def send_frame(self, c):
bytestring = ''.join(c.bytestream)
# Initialize the buffer once (after we have the first set of image data)
if ( not self.databuffer
or not self.spitransfer):
self.transfer, self.databuffer, _ = spi_transfer(bytestring, readlen=0, speedhz=SPEED)
self.databuffer = bytestring
self.dev.do_transfers([self.transfer])
def send_frame(self, c):
bytestring = ''.join(c.bytestream)
# Initialize the buffer once (after we have the first set of image data)
if (not self.databuffer or not self.spitransfer):
self.transfer, self.databuffer, _ = spi_transfer(bytestring,
readlen=0,
speedhz=SPEED)
self.databuffer = bytestring
self.dev.do_transfers([self.transfer])
def writeDac(device,chan,val):
v1 = 0x30 | (chan<<7) | (val>>4);
v2 = ((val & 0xF) << 4);
data = "%0.2X" % v1 + "%0.2X" % v2
#transfers data string
transfer, buf, _ = spi_transfer(bytes.fromhex(data), readlen=0)
b=device.do_transfers(transfer)
return b;
def readAdc(device,chan):
#This is my data that I want sent through my SPI bus
v1 = 0xD0 | (chan<<5) ;
v2 = 0;
data = "%0.2X" % v1 + "%0.2X" % v2
#transfers data string
transfer, buf, _ = spi_transfer(bytes.fromhex(data), readlen=2)
b=device.do_transfers(transfer)
# decode value
answer=list(transfer)
value= ( (answer[0]*128) | (answer[1]>>1) )
value= value & 0x3ff
return value;
