Merge pull request #118 from ladyada/main

add support for different chip detection + quad rotary demo

Author: ladyada

adafruit_seesaw/seesaw.py

@@ -105,7 +105,12 @@ def const(x):
 _TOUCH_CHANNEL_OFFSET = const(0x10)
 
 _SAMD09_HW_ID_CODE = const(0x55)
-_ATTINY8X7_HW_ID_CODE = const(0x87)
+_ATTINY806_HW_ID_CODE = const(0x84)
+_ATTINY807_HW_ID_CODE = const(0x85)
+_ATTINY816_HW_ID_CODE = const(0x86)
+_ATTINY817_HW_ID_CODE = const(0x87)
+_ATTINY1616_HW_ID_CODE = const(0x88)
+_ATTINY1617_HW_ID_CODE = const(0x89)
 _EEPROM_I2C_ADDR = const(0x3F)
 
 _ENCODER_STATUS = const(0x00)
@@ -145,13 +150,18 @@ def __init__(self, i2c_bus, addr=0x49, drdy=None, reset=True):
             self.sw_reset()
 
         self.chip_id = self.read8(_STATUS_BASE, _STATUS_HW_ID)
-
-        if self.chip_id not in (_ATTINY8X7_HW_ID_CODE, _SAMD09_HW_ID_CODE):
+        if self.chip_id not in (
+            _ATTINY806_HW_ID_CODE,
+            _ATTINY807_HW_ID_CODE,
+            _ATTINY816_HW_ID_CODE,
+            _ATTINY817_HW_ID_CODE,
+            _ATTINY1616_HW_ID_CODE,
+            _ATTINY1617_HW_ID_CODE,
+            _SAMD09_HW_ID_CODE,
+        ):
             raise RuntimeError(
-                "Seesaw hardware ID returned (0x{:x}) is not "
-                "correct! Expected 0x{:x} or 0x{:x}. Please check your wiring.".format(
-                    self.chip_id, _SAMD09_HW_ID_CODE, _ATTINY8X7_HW_ID_CODE
-                )
+                f"Seesaw hardware ID returned 0x{self.chip_id} is not "
+                "correct! Please check your wiring."
             )
 
         pid = self.get_version() >> 16
@@ -164,15 +174,22 @@ def __init__(self, i2c_bus, addr=0x49, drdy=None, reset=True):
             from adafruit_seesaw.robohat import MM1_Pinmap
 
             self.pin_mapping = MM1_Pinmap
-        elif pid in (_5690_PID, _5681_PID, _5743_PID):
+        elif (pid in (_5690_PID, _5681_PID, _5743_PID)) or (
+            self.chip_id
+            in (_ATTINY816_HW_ID_CODE, _ATTINY806_HW_ID_CODE, _ATTINY1616_HW_ID_CODE)
+        ):
             from adafruit_seesaw.attinyx16 import ATtinyx16_Pinmap
 
             self.pin_mapping = ATtinyx16_Pinmap
         elif self.chip_id == _SAMD09_HW_ID_CODE:
             from adafruit_seesaw.samd09 import SAMD09_Pinmap
 
             self.pin_mapping = SAMD09_Pinmap
-        elif self.chip_id == _ATTINY8X7_HW_ID_CODE:
+        elif self.chip_id in (
+            _ATTINY817_HW_ID_CODE,
+            _ATTINY807_HW_ID_CODE,
+            _ATTINY1617_HW_ID_CODE,
+        ):
             from adafruit_seesaw.attiny8x7 import ATtiny8x7_Pinmap
 
             self.pin_mapping = ATtiny8x7_Pinmap
@@ -255,10 +272,10 @@ def analog_read(self, pin, delay=0.008):
         if pin not in self.pin_mapping.analog_pins:
             raise ValueError("Invalid ADC pin")
 
-        if self.chip_id == _ATTINY8X7_HW_ID_CODE:
-            offset = pin
-        elif self.chip_id == _SAMD09_HW_ID_CODE:
+        if self.chip_id == _SAMD09_HW_ID_CODE:
             offset = self.pin_mapping.analog_pins.index(pin)
+        else:
+            offset = pin
 
         self.read(_ADC_BASE, _ADC_CHANNEL_OFFSET + offset, buf, delay)
         ret = struct.unpack(">H", buf)[0]
@@ -351,10 +368,10 @@ def analog_write(self, pin, value):
         if pin not in self.pin_mapping.pwm_pins:
             raise ValueError("Invalid PWM pin")
 
-        if self.chip_id == _ATTINY8X7_HW_ID_CODE:
-            offset = pin
-        elif self.chip_id == _SAMD09_HW_ID_CODE:
+        if self.chip_id == _SAMD09_HW_ID_CODE:
             offset = self.pin_mapping.pwm_pins.index(pin)
+        else:
+            offset = pin
 
         if self.pin_mapping.pwm_width == 16:
             cmd = bytearray([offset, (value >> 8), value & 0xFF])

examples/seesaw_quadrotary.py

@@ -0,0 +1,54 @@
+# SPDX-FileCopyrightText: 2023 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""Quad I2C rotary encoder NeoPixel color picker example."""
+import board
+from rainbowio import colorwheel
+import digitalio
+import adafruit_seesaw.seesaw
+import adafruit_seesaw.neopixel
+import adafruit_seesaw.rotaryio
+import adafruit_seesaw.digitalio
+
+# For boards/chips that don't handle clock-stretching well, try running I2C at 50KHz
+# import busio
+# i2c = busio.I2C(board.SCL, board.SDA, frequency=50000)
+# For using the built-in STEMMA QT connector on a microcontroller
+i2c = board.STEMMA_I2C()
+seesaw = adafruit_seesaw.seesaw.Seesaw(i2c, 0x49)
+
+encoders = [adafruit_seesaw.rotaryio.IncrementalEncoder(seesaw, n) for n in range(4)]
+switches = [adafruit_seesaw.digitalio.DigitalIO(seesaw, pin) for pin in (12, 14, 17, 9)]
+for switch in switches:
+    switch.switch_to_input(digitalio.Pull.UP)  # input & pullup!
+
+# four neopixels per PCB
+pixels = adafruit_seesaw.neopixel.NeoPixel(seesaw, 18, 4)
+pixels.brightness = 0.5
+
+last_positions = [-1, -1, -1, -1]
+colors = [0, 0, 0, 0]  # start at red
+
+while True:
+    # negate the position to make clockwise rotation positive
+    positions = [encoder.position for encoder in encoders]
+    print(positions)
+    for n, rotary_pos in enumerate(positions):
+        if rotary_pos != last_positions[n]:
+            print(f"Rotary #{n}: {rotary_pos}")
+            last_positions[n] = rotary_pos
+
+            if switches[n].value:  # Change the LED color if switch is not pressed
+                if (
+                    rotary_pos > last_positions[n]
+                ):  # Advance forward through the colorwheel.
+                    colors[n] += 8
+                else:
+                    colors[n] -= 8  # Advance backward through the colorwheel.
+                colors[n] = (colors[n] + 256) % 256  # wrap around to 0-256
+
+        # if switch is pressed, light up white, otherwise use the stored color
+        if not switches[n].value:
+            pixels[n] = 0xFFFFFF
+        else:
+            pixels[n] = colorwheel(colors[n])