X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/120c7a7f4c7559ede6a7d098e4800663381fc93d..050c6e5bdbe0d75d4b0f053addb368421835a3a7:/src/adafruit_blinka/microcontroller/rp2040_u2if/spi.py

diff --git a/src/adafruit_blinka/microcontroller/rp2040_u2if/spi.py b/src/adafruit_blinka/microcontroller/rp2040_u2if/spi.py
new file mode 100644
index 0000000..4d0bf86
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/rp2040_u2if/spi.py
@@ -0,0 +1,86 @@
+"""SPI Classes for RP2040s with u2if firmware"""
+from .rp2040_u2if import rp2040_u2if
+
+# pylint: disable=protected-access, no-self-use
+class SPI:
+    """SPI Base Class for RP2040 u2if"""
+
+    MSB = 0
+
+    def __init__(self, index, *, baudrate=100000):
+        self._index = index
+        self._frequency = baudrate
+        rp2040_u2if.spi_set_port(self._index)
+        rp2040_u2if.spi_configure(self._frequency)
+
+    # pylint: disable=too-many-arguments,unused-argument
+    def init(
+        self,
+        baudrate=1000000,
+        polarity=0,
+        phase=0,
+        bits=8,
+        firstbit=MSB,
+        sck=None,
+        mosi=None,
+        miso=None,
+    ):
+        """Initialize the Port"""
+        self._frequency = baudrate
+        rp2040_u2if.spi_set_port(self._index)
+        rp2040_u2if.spi_configure(self._frequency)
+
+    # pylint: enable=too-many-arguments
+
+    @property
+    def frequency(self):
+        """Return the current frequency"""
+        return self._frequency
+
+    def write(self, buf, start=0, end=None):
+        """Write data from the buffer to SPI"""
+        rp2040_u2if.spi_write(buf, start=start, end=end)
+
+    def readinto(self, buf, start=0, end=None, write_value=0):
+        """Read data from SPI and into the buffer"""
+        rp2040_u2if.spi_readinto(buf, start=start, end=end, write_value=write_value)
+
+    # pylint: disable=too-many-arguments
+    def write_readinto(
+        self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None
+    ):
+        """Perform a half-duplex write from buffer_out and then
+        read data into buffer_in
+        """
+        rp2040_u2if.spi_write_readinto(
+            buffer_out,
+            buffer_in,
+            out_start=out_start,
+            out_end=out_end,
+            in_start=in_start,
+            in_end=in_end,
+        )
+
+    # pylint: enable=too-many-arguments
+
+class SPI_Pico(SPI):
+
+    def __init__(self, clock, *, baudrate=100000):
+        index = None
+        if clock.id == 18:
+            index = 0
+        if clock.id == 10:
+            index = 1
+        if index is None:
+            raise ValueError("No SPI port on specified pin.")
+        super().__init__(index, baudrate=baudrate)
+
+class SPI_Feather(SPI):
+
+    def __init__(self, clock, *, baudrate=100000):
+        index = None
+        if clock.id == 18:
+            index = 0
+        if index is None:
+            raise ValueError("No SPI port on specified pin.")
+        super().__init__(index, baudrate=baudrate)
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