some convenience improvements

gex/units/DOut.py

@@ -43,22 +43,22 @@ class DOut(gex.Unit):
         pb.u16(self.pins2int(pins))
         self._send(CMD_TOGGLE, pb.close(), confirm=confirm)
 
-    def pulse_ms(self, pins, length, active=True, confirm=True):
+    def pulse_ms(self, ms, pins=0b01, active=True, confirm=True):
         """ Send a pulse with length 1-65535 ms on selected pins """
         pb = gex.PayloadBuilder()
         pb.u16(self.pins2int(pins))
         pb.bool(active)
         pb.bool(False)
-        pb.u16(length)
+        pb.u16(ms)
         self._send(CMD_PULSE, pb.close(), confirm=confirm)
 
-    def pulse_us(self, pins, length, active=True, confirm=True):
+    def pulse_us(self, us, pins=1, active=True, confirm=True):
         """ Send a pulse of 1-999 us on selected pins """
         pb = gex.PayloadBuilder()
         pb.u16(self.pins2int(pins))
         pb.bool(active)
         pb.bool(True)
-        pb.u16(length)
+        pb.u16(us)
         self._send(CMD_PULSE, pb.close(), confirm=confirm)
 
 

gex/units/SPI.py

@@ -14,6 +14,8 @@ class SPI(gex.Unit):
 
         If rskip is -1 (default), the tbytes length will be used.
         Set it to 0 to skip nothing.
+
+        slave is 0-based index
         """
         if rskip == -1:
             rskip = len(tbytes)
@@ -24,7 +26,7 @@ class SPI(gex.Unit):
         pb.u16(rlen)
         pb.blob(tbytes)
 
-        # SPI does not respond if rlen is 0, but can be envorced using 'confirm'
+        # SPI does not respond if rlen is 0, but can be enforced using 'confirm'
         if rlen > 0:
             resp = self._query(0x00, pb.close())
             return resp.data