code help. Write/Read to buffer with SakuraG

[salva]

Hello, I’m trying to understand this code: github.com/newaetech/chipwhispe … SAKURAG.py

I’ve noticed that for reading/writting to the buffer you have to write: sasebo.write / sasebo.read.

Why do you put sasebo before the method? sasebo is the buffer, right? where does this name come from?

What happend if I just put “write” without sasebo ?

Example codes:

def write(self, address, MSB, LSB):
    msg = bytearray(5)

    msg[0] = 0x01;
    msg[1] = (address >> 8) & 0xFF;  # MSB
    msg[2] = address & 0xFF;  # LSB
    msg[3] = MSB;
    msg[4] = LSB;

    strmsg = str(msg);

    self.[size=150][b]sasebo.write[/b][/size](strmsg)
    
def write128(self, address, msg):                  
    for i in range(0, 16, 2):
        self.[size=150][b]write[/b][/size](address+i, msg[i], msg[i+1])
    

def read(self, address):
    self.flush()
    msg = bytearray(3)
    msg[0] = 0x00;
    msg[1] = (address >> 8) & 0xFF;  # MSB
    msg[2] = address & 0xFF;  # LSB
    self.[size=150][b]sasebo.write[/b][/size](str(msg))
    
    msg = self.[size=150][b]sasebo.read[/b][/size](2)
    msg = bytearray(msg)

    return msg

Thanks in advance

[coflynn]

Hello there,

The “sasebo” is the FTDI D2XX driver. There is a chunk of code like this:

def con(self):
        try:
            self.sasebo = ft.openEx(self.serNo)
        except ft.ftd2xx.DeviceError, e:
            self.sasebo = None
            print "Failed to find device: %s" % str(e)
            return False

        self.sasebo.setTimeouts(1000, 1000)

        return True

The line “self.sasebo = …” sets the SASEBO piece to be your FTDI D2XX driver API. So it’s just read/writing to that chip!

-Colin