X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/4782c180b240d80a772f63ca81e0876f39a69c26..7c00779e475ef10923dc53fddb20ad23eae484af:/src/adafruit_blinka/microcontroller/rp2040/i2c.py

diff --git a/src/adafruit_blinka/microcontroller/rp2040/i2c.py b/src/adafruit_blinka/microcontroller/rp2040/i2c.py
new file mode 100644
index 0000000..16ff2e3
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/rp2040/i2c.py
@@ -0,0 +1,65 @@
+"""I2C Class for RP2040"""
+from machine import I2C as _I2C
+from machine import Pin
+from microcontroller.pin import i2cPorts
+
+
+class I2C:
+    """Custom I2C Class for RP2040"""
+
+    def __init__(self, scl, sda, *, frequency=100000):
+        for portId, portScl, portSda in i2cPorts:
+            try:
+                if scl == portScl and sda == portSda:
+                    self._i2c = _I2C(
+                        portId, sda=Pin(sda.id), scl=Pin(scl.id), freq=frequency
+                    )
+                    break
+            except RuntimeError:
+                pass
+        else:
+            raise ValueError(
+                "No Hardware I2C on (scl,sda)={}\nValid I2C ports: {}".format(
+                    (scl, sda), i2cPorts
+                )
+            )
+
+    def scan(self):
+        """Perform an I2C Device Scan"""
+        return self._i2c.scan()
+
+    # pylint: disable=unused-argument
+    def writeto(self, address, buffer, *, stop=True):
+        "Write data to the address from the buffer"
+        return self._i2c.writeto(address, buffer)
+
+    def readfrom_into(self, address, buffer, *, stop=True):
+        """Read data from an address and into the buffer"""
+        return self._i2c.readfrom_into(address, buffer)
+
+    def writeto_then_readfrom(
+        self,
+        address,
+        buffer_out,
+        buffer_in,
+        *,
+        out_start=0,
+        out_end=None,
+        in_start=0,
+        in_end=None,
+        stop=False
+    ):
+        """Write data from buffer_out to an address and then
+        read data from an address and into buffer_in
+        """
+        self._i2c.writeto_then_readfrom(
+            address,
+            buffer_out,
+            buffer_in,
+            out_start=out_start,
+            out_end=out_end,
+            in_start=in_start,
+            in_end=in_end,
+        )
+
+    # pylint: enable=unused-argument