fix:Cancel return of TI2 when TI returns all values

Author: SchoolMater

xarm/x3/gpio.py

@@ -83,21 +83,14 @@ def get_tgpio_digital(self, ionum=None):
         if self.check_is_simulation_robot():
             return 0, [0, 0] if ionum is None else 0
         if ionum == 2:
-            # only available in Lite6
+            # Only available for Lite6 and 850
             ret = self.arm_cmd.tgpio_addr_r16(0x0A12)
             return ret[0], ret[1] & 0x0001
-        elif isinstance(ionum, int):
+        else:
             ret = self.arm_cmd.tgpio_get_digital()
             if ret[0] == 0:
                 self.tgpio_state['digital'] = ret[1:]
-            return ret[0], ret[ionum+1 if ionum < 3 else ionum]
-        else:
-            ret1 = self.arm_cmd.tgpio_addr_r16(0x0A12)
-            ret2 = self.arm_cmd.tgpio_get_digital()
-            if ret2[0] == 0:
-              self.tgpio_state['digital'] = ret2[1:]
-            ret2.insert(3, ret1[1])
-            return ret1[0] or ret2[0], ret2[1:]
+            return ret[0], ret[1:] if ionum is None else ret[ionum + 1 if ionum < 3 else ionum]
 
     @xarm_is_connected(_type='get')
     def get_tgpio_output_digital(self, ionum=None):