Add support for getting/setting GPIOs

src/cy_serial_bridge/driver.py

@@ -364,6 +364,80 @@ def read_user_flash(self, addr: int, size: int) -> bytearray:
             result_bytes.extend(page_bytes)
 
         return result_bytes
+
+
+    def is_gpio_output(self, gpio_nr: int) -> bool:
+        """
+        Check if a GPIO pin is in output mode.
+
+        :param pin: GPIO pin number to check
+        :return: True if the pin is an output pin, False otherwise
+        """
+
+        # TODO implement by checking it in the active configuration block
+        return True
+
+
+    def is_gpio_input(self, gpio_nr: int) -> bool:
+        """
+        Check if a GPIO pin is readable.
+        We can read the value of input or output pins, but
+        not if they are tristated or in some other mode.
+
+        :param pin: GPIO pin number to check
+        :return: True if the pin is an input pin, False otherwise
+        """
+
+        # TODO implement by checking it in the active configuration block
+        return True
+
+
+    def set_gpio(self, gpio_nr: int, value: int) -> None:
+        """
+        Set the value of a GPIO pin.
+
+        :param pin: GPIO pin number to set
+        :param value: Value to set the pin to
+        """
+
+        if not self.is_gpio_output(gpio_nr):
+            message = f"GPIO {gpio_nr} is not usable!"
+            raise CySerialBridgeError(message)        
+        if value != 0 and value != 1:
+            value = 1
+        self.dev.controlWrite(
+                request_type=CY_VENDOR_REQUEST_HOST_TO_DEVICE,
+                request=CyVendorCmds.CY_GPIO_SET_VALUE_CMD,
+                value=gpio_nr,
+                index=value,
+                data=[],
+                timeout=self.timeout
+            )
+        # TODO check for errors
+
+
+    def get_gpio(self, gpio_nr: int) -> int:
+        """
+        Get the value of a GPIO pin.
+        :param pin: GPIO pin number to get
+        :return: Value of the pin
+        """
+
+        if not self.is_gpio_input(gpio_nr):
+            message = f"GPIO {gpio_nr} is not usable!"
+            raise CySerialBridgeError(message)
+        result_bytes = self.dev.controlRead(
+                request_type=CY_VENDOR_REQUEST_DEVICE_TO_HOST,
+                request=CyVendorCmds.CY_GPIO_GET_VALUE_CMD,
+                value=gpio_nr,
+                index=0,
+                length=CY_GET_GPIO_LEN,
+                timeout=self.timeout
+            )
+        if len(result_bytes) != CY_GET_GPIO_LEN or result_bytes[0] != 0:
+            message = f"Error getting GPIO {gpio_nr}"
+            raise CySerialBridgeError(message)
+        return result_bytes[1]
 
 
 class CyMfgrIface(CySerBridgeBase):

src/cy_serial_bridge/usb_constants.py

@@ -86,8 +86,13 @@ class CyVendorCmds(IntEnum):
     CY_JTAG_READ_CMD = 0xD2
     CY_JTAG_WRITE_CMD = 0xD3
 
+    # From Infineon's forums on Mar 24, 2023, here: https://community.infineon.com/t5/USB-low-full-high-speed/CY7C65215-Get-Set-GPIO-Config/td-p/336658
+    #    "CY_GPIO_GET_CONFIG_CMD is maintaining in CyUSBCommon.h but it has not been implemented at the
+    #     hoist side and Silicon so this will not work, we apologize for the confusion with this code 
+    #     will remove this in the upcoming release so it does not create confusion to the user."
     CY_GPIO_GET_CONFIG_CMD = 0xD8
     CY_GPIO_SET_CONFIG_CMD = 0xD9
+    # GET_VALUE and SET_VALUE are implemented and can be used
     CY_GPIO_GET_VALUE_CMD = 0xDA
     CY_GPIO_SET_VALUE_CMD = 0xDB
 
@@ -191,7 +196,8 @@ class CyUart(IntEnum):
 CY_GET_SILICON_ID_LEN = 4
 CY_GET_FIRMWARE_VERSION_LEN = 8
 CY_GET_SIGNATURE_LEN = 4
-
+CY_GET_GPIO_LEN = 2
+CY_SET_GPIO_LEN = 1
 
 # PHDC related macros
 class CyPhdc(IntEnum):