first commit guide code for power deliverer

USB_C_Power_Deliverer/code.py

@@ -0,0 +1,156 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 John Park for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+USB C PD power supply w HUSB238
+pick voltages and then set them, measures high side current with INA219
+"""
+import time
+import board
+import keypad
+import displayio
+import terminalio
+from adafruit_display_text import label
+from adafruit_display_shapes.rect import Rect
+import adafruit_husb238
+from adafruit_ina219 import INA219
+
+i2c = board.I2C()
+
+tft_d0_button = keypad.Keys((board.D0,), value_when_pressed=False, pull=True)
+tft_buttons = keypad.Keys((board.D1, board.D2), value_when_pressed=True, pull=True)
+
+# Initialize INA219 current sensor
+ina219 = INA219(i2c)
+
+TXTCOL_VOLT = 0x8f00cd
+TXTCOL_CURR = 0xb30090
+TXTCOL_DIM = 0xCD8F00
+TXTCOL_HEAD = 0xCD8F00
+TXTCOL_BTN = 0xa0a0a0
+BGCOL = 0x220030
+display = board.DISPLAY
+group = displayio.Group()
+
+background_rect = Rect(0, 0, display.width, display.height, fill=BGCOL)
+group.append(background_rect)
+
+warning_text = "plug in USB C PD cable, press reset"
+
+FONT = terminalio.FONT
+
+display.root_group = group
+
+RUNNING = None
+PLUGGED = None
+
+# Initialize HUSB238 PD dummy
+try:
+    pd = adafruit_husb238.Adafruit_HUSB238(i2c)
+    RUNNING = True
+    PLUGGED = True
+except ValueError:
+    print("plug in a USB C PD cable, then press reset")
+    RUNNING = False
+    PLUGGED = False
+
+    warning_label = label.Label(
+        FONT, text=warning_text, color=0xdd0000,
+        scale=1, anchor_point=(0,0),
+        anchored_position=(20, 10)
+    )
+    group.append(warning_label)
+    #stop the code here
+
+while not RUNNING:
+    pass
+
+while RUNNING:
+    voltages = pd.available_voltages
+    print("The following voltages are available:")
+    for i, volts in enumerate(voltages):
+        print(f"{volts}V")
+
+    v = 0
+
+    if pd.attached:
+        pd.voltage = voltages[0]
+        print(f"Voltage is set to {pd.voltage}V/{pd.current}A")
+
+    display = board.DISPLAY
+
+    group = displayio.Group()
+    background_rect = Rect(0, 0, display.width, display.height, fill=BGCOL)
+    group.append(background_rect)
+    vert_bar = Rect(40, 0, 3, display.height, fill=0x000000)
+    group.append(vert_bar)
+
+    FONT = terminalio.FONT
+
+    header_label = label.Label(
+        FONT, text="Power Deliverer", color=TXTCOL_HEAD,
+        scale=2, x=50, y=8
+    )
+    group.append(header_label)
+    voltage_label = label.Label(
+        FONT, text=str(voltages[0])+"V", color=TXTCOL_VOLT,
+        scale=5, anchor_point=(0,0),
+        anchored_position=(50, 20)
+    )
+    group.append(voltage_label)
+    current_label = label.Label(
+        FONT, text="0mA", color=TXTCOL_CURR,
+        scale=5, anchor_point=(0,0),
+        anchored_position=(50, 80)
+    )
+    group.append(current_label)
+    go_label = label.Label(FONT, text="set", color=TXTCOL_BTN, scale=2, x=1, y=6)
+    group.append(go_label)
+    up_label = label.Label(FONT, text="+v", color=TXTCOL_BTN, scale=2, x=1, y=display.height//2-2)
+    group.append(up_label)
+    down_label = label.Label(FONT, text="-v", color=TXTCOL_BTN, scale=2, x=1, y=display.height-12)
+    group.append(down_label)
+
+    display.root_group = group
+
+
+    while True:
+        tft_d0_button_event = tft_d0_button.events.get()
+        if tft_d0_button_event and tft_d0_button_event.pressed:
+            try:
+                print(f"Setting to {voltages[v]}V!")
+                pd.voltage = voltages[v]
+                voltage_label.text=str(voltages[v]) + "V"
+                voltage_label.color=TXTCOL_VOLT
+                print(f"It is set to {pd.voltage}V/{pd.current}A")
+                print()
+                PLUGGED=True
+            except OSError:
+                print(warning_text)
+                voltage_label.text="replug"
+                current_label.text="USB C"
+                PLUGGED=False
+
+        if PLUGGED:
+            tft_buttons_event = tft_buttons.events.get()
+            if tft_buttons_event and tft_buttons_event.pressed:
+                if tft_buttons_event.key_number == 0:
+                    v = (v + 1) % len(voltages)  # maybe have this stop at max
+                    voltage_label.color=TXTCOL_DIM
+                    voltage_label.text="["+str(voltages[v]) + "V]"
+                    print(f"Voltage will be set to {voltages[v]}V")
+
+                if tft_buttons_event.key_number == 1:
+                    v = (v - 1) % len(voltages)  # maybe have this stop at min
+                    voltage_label.color=TXTCOL_DIM
+                    voltage_label.text="["+str(voltages[v]) + "V]"
+                    print(f"Voltage will be set to {voltages[v]}V")
+
+            current = ina219.current  # current in mA
+            # power = ina219.power  # power in watts
+            current_label.text= str(abs(int(current))) + "mA"
+
+            if ina219.overflow:
+                print("Internal Math Overflow Detected!")
+                print("")
+            time.sleep(0.2)