Add RFG UDP source to rph_radar

python_app/hardware_full/laser_control/protocol.py

@@ -9,7 +9,7 @@ from operator import xor
 import serial
 
 from .constants import BAUDRATE, SERIAL_TIMEOUT_SEC
-from .conversions import current_ma_to_n, temp_c_to_n
+from .conversions import current_ma_to_n, temp_c_to_n, variation_codes
 from .validators import validate_manual, validate_variation
 from .exceptions import CommunicationError, PortBusyError, ProtocolError
 
@@ -116,9 +116,7 @@ class Protocol:
             raise ValueError("radar.laser_control.variation.variation_type must be CHANGE_CURRENT_LD1")
         validate_manual(static_temp1, static_temp2, static_current1, static_current2)
         validate_variation(min_value, max_value, step, time_step, delay_time)
-        low, high, delta = (current_ma_to_n(value) for value in (min_value, max_value, step))
-        if delta == 0 or low >= high:
-            raise ValueError("Current variation range and step must be representable by the DAC")
+        low, high, delta = variation_codes(min_value, max_value, step)
         return _command(
             0x7777, 0x37ff, 1, low, high, delta, int(time_step * 100),
             temp_c_to_n(static_temp1), current_ma_to_n(static_current2), temp_c_to_n(static_temp2),