From: caternuson <caternuson@gmail.com>
Date: Fri, 20 Sep 2019 01:35:41 +0000 (-0700)
Subject: initial working ft232h i2c/spi/gpio
X-Git-Tag: 2.5.0^2~4
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/ecba441c03a58ce97b3c1c769cb9c76675abbf7f

initial working ft232h i2c/spi/gpio
---

diff --git a/src/adafruit_blinka/board/ftdi_ft232h.py b/src/adafruit_blinka/board/ftdi_ft232h.py
new file mode 100644
index 0000000..fc9aaf1
--- /dev/null
+++ b/src/adafruit_blinka/board/ftdi_ft232h.py
@@ -0,0 +1,21 @@
+from adafruit_blinka.microcontroller.ft232h import pin
+
+D4 = pin.D4
+D5 = pin.D5
+D6 = pin.D6
+D7 = pin.D7
+C0 = pin.C0
+C1 = pin.C1
+C2 = pin.C2
+C3 = pin.C3
+C4 = pin.C4
+C5 = pin.C5
+C6 = pin.C6
+C7 = pin.C7
+
+SDA = pin.SDA
+SCL = pin.SCL
+
+SCLK = pin.SCLK
+MOSI = pin.MOSI
+MISO = pin.MISO
diff --git a/src/adafruit_blinka/microcontroller/ft232h/__init__.py b/src/adafruit_blinka/microcontroller/ft232h/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/adafruit_blinka/microcontroller/ft232h/i2c.py b/src/adafruit_blinka/microcontroller/ft232h/i2c.py
new file mode 100644
index 0000000..45b8921
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/ft232h/i2c.py
@@ -0,0 +1,34 @@
+from adafruit_blinka.microcontroller.ft232h.pin import Pin
+
+class I2C:
+
+    def __init__(self):
+        # change GPIO controller to I2C
+        from pyftdi.i2c import I2cController
+        self._i2c = I2cController()
+        self._i2c.configure('ftdi:///1')
+        Pin.ft232h_gpio = self._i2c.get_gpio()
+
+    def writeto(self, address, buffer, *, start=0, end=None, stop=True):
+        end = end if end else len(buffer)
+        port = self._i2c.get_port(address)
+        port.write(buffer[start:end], relax=stop)
+
+    def readfrom_into(self, address, buffer, *, start=0, end=None, stop=True):
+        end = end if end else len(buffer)
+        port = self._i2c.get_port(address)
+        result = port.read(len(buffer[start:end]), relax=stop)
+        for i, b in enumerate(result):
+            buffer[start+i] = b
+
+    def writeto_then_readfrom(self, address, buffer_out, buffer_in, *,
+                              out_start=0, out_end=None,
+                              in_start=0, in_end=None, stop=False):
+        out_end = out_end if out_end else len(buffer_out)
+        in_end = in_end if in_end else len(buffer_in)
+        port = self._i2c.get_port(address)
+        result = port.exchange(buffer_out[out_start:out_end],
+                               in_end-in_start,
+                               relax=True).tobytes()
+        for i, b in enumerate(result):
+            buffer_in[in_start+i] = b
diff --git a/src/adafruit_blinka/microcontroller/ft232h/pin.py b/src/adafruit_blinka/microcontroller/ft232h/pin.py
new file mode 100644
index 0000000..d9763d2
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/ft232h/pin.py
@@ -0,0 +1,79 @@
+class Pin:
+    """A basic Pin class for use with FT232H."""
+
+    IN = 0
+    OUT = 1
+    LOW = 0
+    HIGH = 1
+
+    ft232h_gpio = None
+
+    def __init__(self, pin_id=None):
+        # setup GPIO controller if not done yet
+        # use one provided by I2C as default
+        if not Pin.ft232h_gpio:
+            from pyftdi.i2c import I2cController
+            i2c = I2cController()
+            i2c.configure("ftdi:///1")
+            Pin.ft232h_gpio = i2c.get_gpio()
+        # check if pin is valid
+        if pin_id:
+            if Pin.ft232h_gpio.all_pins & 1 << pin_id == 0:
+                raise ValueError("Can not use pin {} as GPIO.".format(pin_id))
+        # ID is just bit position
+        self.id = pin_id
+
+    def init(self, mode=IN, pull=None):
+        if not self.id:
+            raise RuntimeError("Can not init a None type pin.")
+        # FT232H does't have configurable internal pulls?
+        if pull:
+            raise ValueError("Internal pull up/down not currently supported.")
+        pin_mask = Pin.ft232h_gpio.pins | 1 << self.id
+        current = Pin.ft232h_gpio.direction
+        if mode == self.OUT:
+            current |= 1 << self.id
+        else:
+            current &= ~(1 << self.id)
+        Pin.ft232h_gpio.set_direction(pin_mask, current)
+
+    def value(self, val=None):
+        if not self.id:
+            raise RuntimeError("Can not access a None type pin.")
+        current = Pin.ft232h_gpio.read(with_output=True)
+        # read
+        if val is None:
+            return 1 if current & 1 << self.id != 0 else 0
+        # write
+        elif val in (self.LOW, self.HIGH):
+            if val == self.HIGH:
+                current |= 1 << self.id
+            else:
+                current &= ~(1 << self.id)
+            Pin.ft232h_gpio.write(current & Pin.ft232h_gpio.direction)
+        # release the kraken
+        else:
+            raise RuntimeError("Invalid value for pin")
+
+# create pin instances for each pin
+# D0 to D3 are used by I2C/SPI
+D4 = Pin(4)
+D5 = Pin(5)
+D6 = Pin(6)
+D7 = Pin(7)
+C0 = Pin(8)
+C1 = Pin(9)
+C2 = Pin(10)
+C3 = Pin(11)
+C4 = Pin(12)
+C5 = Pin(13)
+C6 = Pin(14)
+C7 = Pin(15)
+# C8 and C9 are not GPIO
+
+# create None type pins for I2C and SPI since they are expected to be defined
+SCL = Pin()
+SDA = Pin()
+SCK = SCLK = Pin()
+MOSI = Pin()
+MISO = Pin()
\ No newline at end of file
diff --git a/src/adafruit_blinka/microcontroller/ft232h/spi.py b/src/adafruit_blinka/microcontroller/ft232h/spi.py
new file mode 100644
index 0000000..26e1bbb
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -0,0 +1,50 @@
+from adafruit_blinka.microcontroller.ft232h.pin import Pin
+
+class SPI:
+    MSB = 0
+
+    baudrate = 100000
+    mode = 0
+    bits = 8
+
+    def __init__(self):
+        from pyftdi.spi import SpiController
+        self._spi = SpiController(cs_count=1)
+        self._spi.configure('ftdi:///1')
+        Pin.ft232h_gpio = self._spi.get_gpio()
+
+    def init(self, baudrate=100000, polarity=0, phase=0, bits=8,
+                  firstbit=MSB, sck=None, mosi=None, miso=None):
+        self.cs = 0
+        self.freq = baudrate
+        if polarity == 0 and phase == 0:
+            self.mode = 0
+        elif polarity == 0 and phase == 1:
+            self.mode = 1
+        elif polarity == 1 and phase == 0:
+            raise ValueError("SPI mode 2 is not supported.")
+        elif polarity == 1 and phase == 1:
+            self.mode = 3
+        else:
+            raise ValueError("Unknown SPI mode.")
+
+    def write(self, buf, start=0, end=None):
+        end = end if end else len(buf)
+        port = self._spi.get_port(self.cs, self.freq, self.mode)
+        port.write(buf[start:end])
+
+    def readinto(self, buf, start=0, end=None, write_value=0):
+        end = end if end else len(buf)
+        port = self._spi.get_port(self.cs, self.freq, self.mode)
+        result = port.read(end-start)
+        for i, b in enumerate(result):
+            buf[start+i] = b
+
+    def write_readinto(self, buffer_out, buffer_in,  out_start=0, out_end=None, in_start=0, in_end=None):
+        out_end = out_end if out_end else len(buffer_out)
+        in_end = in_end if in_end else len(buffer_in)
+        port = self._spi.get_port(self.cs, self.freq, self.mode)
+        result = port.exchange(buffer_out[out_start:out_end],
+                               in_end-in_start)
+        for i, b in enumerate(result):
+            buffer_in[in_start+i] = b
\ No newline at end of file
diff --git a/src/board.py b/src/board.py
index 9b60001..f56af38 100755
--- a/src/board.py
+++ b/src/board.py
@@ -92,16 +92,19 @@ elif board_id == ap_board.ODROID_C2:
     from adafruit_blinka.board.odroidc2 import *
 
 elif board_id == ap_board.ODROID_N2:
-   from adafruit_blinka.board.odroidn2 import *
+    from adafruit_blinka.board.odroidn2 import *
 
 elif board_id == ap_board.DRAGONBOARD_410C:
     from adafruit_blinka.board.dragonboard_410c import *
 
+elif board_id == ap_board.FTDI_FT232H:
+    from adafruit_blinka.board.ftdi_ft232h import *
+
 elif "sphinx" in sys.modules:
     pass
 
 else:
-    raise NotImplementedError("Board not supported")
+    raise NotImplementedError("Board not supported {}".format(board_id))
 
 def I2C():
     """The singleton I2C interface"""
diff --git a/src/busio.py b/src/busio.py
index 0ddf7dc..9003bab 100755
--- a/src/busio.py
+++ b/src/busio.py
@@ -17,7 +17,11 @@ class I2C(Lockable):
 
     def init(self, scl, sda, frequency):
         self.deinit()
-        if detector.board.any_embedded_linux:
+        if detector.board.ftdi_ft232h:
+            from adafruit_blinka.microcontroller.ft232h.i2c import I2C
+            self._i2c = I2C()
+            return
+        elif detector.board.any_embedded_linux:
             from adafruit_blinka.microcontroller.generic_linux.i2c import I2C as _I2C
         else:
             from machine import I2C as _I2C
@@ -72,7 +76,13 @@ class I2C(Lockable):
 class SPI(Lockable):
     def __init__(self, clock, MOSI=None, MISO=None):
         self.deinit()
-        if detector.board.any_embedded_linux:
+        if detector.board.ftdi_ft232h:
+            from adafruit_blinka.microcontroller.ft232h.spi import SPI as _SPI
+            from adafruit_blinka.microcontroller.ft232h.pin import SCK, MOSI, MISO
+            self._spi = _SPI()
+            self._pins = (SCK, MOSI, MISO)
+            return
+        elif detector.board.any_embedded_linux:
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
         else:
             from machine import SPI as _SPI
@@ -123,6 +133,9 @@ class SPI(Lockable):
         elif board_id == ap_board.JETSON_XAVIER:
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
             from adafruit_blinka.microcontroller.tegra.t194.pin import Pin
+        elif detector.board.ftdi_ft232h:
+            from adafruit_blinka.microcontroller.ft232h.spi import SPI as _SPI
+            from adafruit_blinka.microcontroller.ft232h.pin import Pin
         else:
             from machine import SPI as _SPI
             from machine import Pin
diff --git a/src/digitalio.py b/src/digitalio.py
index 6f6e9d1..c02c4d5 100755
--- a/src/digitalio.py
+++ b/src/digitalio.py
@@ -30,9 +30,11 @@ elif detector.chip.S905:
 elif detector.chip.S922X:
     from adafruit_blinka.microcontroller.amlogic.s922x.pin import Pin
 elif detector.chip.APQ8016:
-  from adafruit_blinka.microcontroller.snapdragon.apq8016.pin import Pin
+    from adafruit_blinka.microcontroller.snapdragon.apq8016.pin import Pin
 elif detector.chip.IMX8MX:
     from adafruit_blinka.microcontroller.nxp_imx8m.pin import Pin
+elif detector.board.ftdi_ft232h:
+    from adafruit_blinka.microcontroller.ft232h.pin import Pin
 elif detector.chip.STM32:
     from machine import Pin
 from adafruit_blinka import Enum, ContextManaged
diff --git a/src/microcontroller/pin.py b/src/microcontroller/pin.py
index 5dd250c..475156d 100755
--- a/src/microcontroller/pin.py
+++ b/src/microcontroller/pin.py
@@ -32,5 +32,7 @@ elif chip_id == ap_chip.APQ8016:
     from adafruit_blinka.microcontroller.snapdragon.apq8016.pin import *
 elif chip_id == ap_chip.IMX8MX:
     from adafruit_blinka.microcontroller.nxp_imx8m.pin import *
+elif chip_id == ap_chip.FT232H:
+    from adafruit_blinka.microcontroller.ft232h.pin import *
 else:
     raise NotImplementedError("Microcontroller not supported: ", chip_id)