Added GreatFET One Support

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / nxp_lpc4330 / uart.py

diff --git a/src/adafruit_blinka/microcontroller/nxp_lpc4330/uart.py b/src/adafruit_blinka/microcontroller/nxp_lpc4330/uart.py
new file mode 100644 (file)
index 0000000..b791269
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/nxp_lpc4330/uart.py
@@ -0,0 +1,66 @@
+"""UART Class for NXP LPC4330"""
+from greatfet import GreatFET
+from greatfet.interfaces.uart import UART as _UART
+
+class UART:
+    """Custom UART Class for NXP LPC4330"""
+
+    PARITY_NONE          = 0
+    PARITY_ODD           = 1
+    PARITY_EVEN          = 2
+    PARITY_STUCK_AT_ONE  = 3
+    PARITY_STUCK_AT_ZERO = 4
+
+    # pylint: disable=too-many-arguments
+    def __init__(
+        self,
+        portid,
+        baudrate=9600,
+        bits=8,
+        parity=None,
+        stop=1,
+        timeout=1000,
+        read_buf_len=None,
+        flow=None,
+    ):
+        self._gf = GreatFET()
+        self._uart = _UART(self._gf, baud=baudrate, data_bits=bits, stop_bits=stop, parity=parity, uart_number=portid)
+        
+        if flow is not None:  # default None
+            raise NotImplementedError(
+                "Parameter '{}' unsupported on GreatFET One".format("flow")
+            )
+
+    # pylint: enable=too-many-arguments
+
+    def deinit(self):
+        """Deinitialize"""
+        self._uart.initialized = False
+
+    def read(self, nbytes=None):
+        """Read data from UART and return it"""
+        if nbytes is None:
+            return None
+        return self._uart.read(nbytes)
+
+    def readinto(self, buf, nbytes=None):
+        """Read data from UART and into the buffer"""
+        if nbytes is None:
+            return None
+        result = self.read(nbytes)
+        for _ in range(nbytes):
+            buf.append(result)
+        return buf
+
+    def readline(self):
+        """Read a single line of data from UART"""
+        out = self.read(nbytes=1)
+        line = out
+        while out != "\r":
+            out = self.read(nbytes=1)
+            line += out
+        return line
+
+    def write(self, buf):
+        """Write data from the buffer to UART"""
+        return self._uart.write(buf)