added dac

_device_main.py

@@ -27,10 +27,13 @@ INITIAL_CURRENT_2 = 35 # 64.0879 max # Set initial current for Laser 2, in mA
 AD9833_FREQ_DEFAULT_KHZ = 125.0
 AD9833_MCLK_DEFAULT_MHZ = 20.0
 DS1809_MAX_STEP = 63
-DS1809_DEFAULT_STEP = 0
+DS1809_DEFAULT_STEP = 3
 DS1809_INIT_HOME_PULSES = 64
 DS1809_INIT_PULSE_MS = 2
 DS1809_INIT_STARTUP_DELAY_S = 0.35
+STM32_DAC_VREF = 2.5
+STM32_DAC_MAX_CODE = 4095
+PA4_DAC_DEFAULT_VOLT = 0.0
 
 #### ---- Functions
 
@@ -94,6 +97,16 @@ def format_ds1809_status(step):
     return f"{step}/{DS1809_MAX_STEP} шагов"
 
 
+def voltage_to_dac_code(voltage_v):
+    if voltage_v is None:
+        return 0
+    if voltage_v < 0.0:
+        voltage_v = 0.0
+    if voltage_v > STM32_DAC_VREF:
+        voltage_v = STM32_DAC_VREF
+    return int(round((voltage_v / STM32_DAC_VREF) * STM32_DAC_MAX_CODE))
+
+
 def initialize_ds1809_position(prt, default_step):
     default_step = clamp_int(int(default_step), 0, DS1809_MAX_STEP)
 
@@ -154,6 +167,8 @@ def set_initial_params():
     params['Ad9833Triangle'] = True
     params['DS1809Step'] = DS1809_DEFAULT_STEP
     params['DS1809Status'] = format_ds1809_status(DS1809_DEFAULT_STEP)
+    params['PA4DacVolt'] = str(PA4_DAC_DEFAULT_VOLT)
+    params['PA4DacStatus'] = f"0 / {STM32_DAC_MAX_CODE}"
     return params
 
 def update_data_lists():
@@ -570,6 +585,21 @@ if __name__ == "__main__":
             params['DS1809Step'] = ds1809_step
             params['DS1809Status'] = format_ds1809_status(ds1809_step)
             window['-DS1809Status-'].update(params['DS1809Status'])
+        elif event == '-SetPA4Dac-':
+            voltage_v = parse_optional_float(values.get('-PA4DacVolt-'))
+            if voltage_v is None:
+                print('Invalid PA4 DAC voltage value.')
+            else:
+                if voltage_v < 0.0:
+                    voltage_v = 0.0
+                if voltage_v > STM32_DAC_VREF:
+                    voltage_v = STM32_DAC_VREF
+                dac_code = voltage_to_dac_code(voltage_v)
+                dev.set_stm32_dac(prt, dac_code=dac_code, enable=True)
+                params['PA4DacVolt'] = f"{voltage_v:.3f}"
+                params['PA4DacStatus'] = f"{dac_code} / {STM32_DAC_MAX_CODE}"
+                window['-PA4DacVolt-'].update(params['PA4DacVolt'])
+                window['-PA4DacStatus-'].update(params['PA4DacStatus'])
         elif event == '-StopCycle-':
             window['-StopCycle-'].update(disabled = True)
             current_and_temperature_settings_available = True

device_commands.py

@@ -16,6 +16,8 @@ AD9833_CMD_TOTAL_LENGTH = 10 # Total bytes when sending AD9833 command
 AD9833_CMD_HEADER = "9999"
 DS1809_CMD_TOTAL_LENGTH = 10 # Total bytes when sending DS1809 UC/DC pulse command
 DS1809_CMD_HEADER = "AAAA"
+STM32_DAC_CMD_TOTAL_LENGTH = 10 # Total bytes when sending STM32 DAC command
+STM32_DAC_CMD_HEADER = "BBBB"
 AD9102_SAW_STEP_DEFAULT = 1
 AD9102_PAT_PERIOD_DEFAULT = 0xFFFF
 AD9102_PAT_PERIOD_BASE_DEFAULT = 0x02
@@ -31,6 +33,9 @@ AD9833_MCLK_HZ_DEFAULT = 20_000_000
 DS1809_FLAG_UC = 0x0001
 DS1809_FLAG_DC = 0x0002
 DS1809_PULSE_MS_DEFAULT = 2
+STM32_DAC_FLAG_ENABLE = 0x0001
+STM32_DAC_CODE_MAX = 4095
+STM32_DAC_VREF_DEFAULT = 3.3
 
 class TaskType(IntEnum):
     Manual                = 0x00
@@ -203,6 +208,17 @@ def send_DS1809(prt, bytestring):
     print("Sent: DS1809 pulse command.")
 
 
+def send_STM32_DAC(prt, bytestring):
+    ''' Set STM32 internal DAC output on PA4 (0xBBBB + ...).
+        Expected device answer: STATE.
+    '''
+    if len(bytestring) != STM32_DAC_CMD_TOTAL_LENGTH:
+        print("Error. Wrong parameter string for STM32 DAC command.")
+        return None
+    prt.write(bytestring)
+    print("Sent: STM32 DAC command.")
+
+
 # ---- Getting data
 
 
@@ -496,6 +512,28 @@ def create_DS1809_pulse_command(uc: bool = False,
     return bytearray.fromhex(data)
 
 
+def create_STM32_DAC_command(dac_code: int, enable: bool = True):
+    if dac_code is None:
+        dac_code = 0
+    if dac_code < 0:
+        dac_code = 0
+    if dac_code > STM32_DAC_CODE_MAX:
+        dac_code = STM32_DAC_CODE_MAX
+
+    flags = STM32_DAC_FLAG_ENABLE if enable else 0
+    param0 = int(dac_code) & 0x0FFF
+    param1 = 0
+    crc_word = flags ^ param0 ^ param1
+
+    data = flipfour(STM32_DAC_CMD_HEADER)  # Word 0 (header)
+    data += flipfour(int_to_hex(flags))
+    data += flipfour(int_to_hex(param0))
+    data += flipfour(int_to_hex(param1))
+    data += flipfour(int_to_hex(crc_word))
+
+    return bytearray.fromhex(data)
+
+
 def encode_Input(params):
 
     if params is None:

device_interaction.py

@@ -147,6 +147,13 @@ def start_ad9833_ramp(prt, freq_hz=None, mclk_hz=None, triangle=True, enable=Tru
     return _print_state_reply(cmd.get_STATE(prt))
 
 
+def set_stm32_dac(prt, dac_code, enable=True):
+    hexstring = cmd.create_STM32_DAC_command(dac_code=dac_code, enable=enable)
+    cmd.send_STM32_DAC(prt, hexstring)
+    time.sleep(WAIT_AFTER_SEND)
+    return _print_state_reply(cmd.get_STATE(prt))
+
+
 def _wait_for_min_bytes(prt, expected_len, timeout_s, poll_s=0.01):
     deadline = time.time() + timeout_s
     while time.time() < deadline:

gui.py

@@ -59,6 +59,10 @@ SET_DS1809_SECTION_TEXT = 'DS1809 (UC/DC)'
 SET_DS1809_UC_BUTTON_TEXT = 'UC импульс'
 SET_DS1809_DC_BUTTON_TEXT = 'DC импульс'
 SET_DS1809_STATUS_TEXT = 'Позиция DS1809:'
+SET_STM32_DAC_SECTION_TEXT = 'STM32 DAC (PA4)'
+SET_STM32_DAC_VOLT_TEXT = 'Напряжение DAC PA4 (В, 0..2.5):'
+SET_STM32_DAC_BUTTON_TEXT = 'Установить DAC'
+SET_STM32_DAC_STATUS_TEXT = 'Код DAC PA4:'
 
 
 GRAPH_POINTS_NUMBER = 100 # Number of most recent data points shown on charts
@@ -295,6 +299,18 @@ def setup_gui(params):
                          sg.Text(params.get('DS1809Status', '--'), key='-DS1809Status-', size=(20,1))],
 
                         [sg.HSeparator(pad=H_SEPARATOR_PAD)],
+
+                        [sg.Text(SET_STM32_DAC_SECTION_TEXT, size=(SET_TEXT_WIDTH_NEW,1))],
+
+                        [sg.Text(SET_STM32_DAC_VOLT_TEXT, size=(SET_TEXT_WIDTH_NEW,1)),
+                            sg.Input(params.get('PA4DacVolt', '0.0'), size=(SET_INPUT_WIDTH,1), key='-PA4DacVolt-')],
+
+                        [sg.Button(SET_STM32_DAC_BUTTON_TEXT, key='-SetPA4Dac-', disabled_button_color=("Gray22", "Blue"))],
+
+                        [sg.Text(SET_STM32_DAC_STATUS_TEXT, size=(SET_TEXT_WIDTH_NEW,1)),
+                         sg.Text(params.get('PA4DacStatus', '0 / 4095'), key='-PA4DacStatus-', size=(20,1))],
+
+                        [sg.HSeparator(pad=H_SEPARATOR_PAD)],
                         
                         [sg.Button(SET_START_BUTTON_TEXT, key='-StartCycle-', disabled_button_color=("Gray22", "Blue"), disabled=True), sg.Button(SET_STOP_BUTTON_TEXT, disabled_button_color=("Gray22", "Blue"), key='-StopCycle-', disabled=True), sg.Button(SET_RAMP_BUTTON_TEXT, key='-StartRamp-', disabled_button_color=("Gray22", "Blue")), sg.Button(SET_AD9833_BUTTON_TEXT, key='-StartRamp9833-', disabled_button_color=("Gray22", "Blue"))]]