Hi John,
1) CyGetListofDevices returns the number of Devices connected to the vendor driver. In your case its 2 i.e. Vendor 1 and Vendor MFG comes up as two separate devices with 1 interface each, which are bound to the same vendor driver.
About the enums may I know which return values are you referring to?
2) Everything that works on 211 also works on 211A, in addition to certain firmware enhancements in 211A.
You may change the silicon at any point of time since they both have that same functionality.
3) All the 3 data structures mentioned are enums.
a) CY_DEVICE_TYPE is an enum which returns the type of the device.
typedef enum _CY_DEVICE_TYPE {
CY_TYPE_DISABLED = 0, /*Invalid device type or interface is not CY_CLASS_VENDOR*/
CY_TYPE_UART, /*Interface of device is of type UART*/
CY_TYPE_SPI, /*Interface of device is of type SPI */
CY_TYPE_I2C, /*Interface of device is of type I2C */
CY_TYPE_JTAG, /*Interface of device is of type JTAG*/
CY_TYPE_MFG /*Interface of device is in Manufacturing mode*/
} CY_DEVICE_TYPE;
In case of Vendor mode, the Vendor 1(in device manager) which is configured as UART returns a device type1(CY_TYPE_UART) and the vendor MFG returns device type 5. (see Fig 1.)
In case of CDC mode there is only one device type i.e. vendor MFG. that returns device type 5. (see Fig. 2) and the Other interface comes as a serial Adapter and as a COM port.
b) CY_DEVICE_CLASS is an enum which returns class of a particular device interface.
typedef enum _CY_DEVICE_CLASS{
CY_CLASS_DISABLED = 0, /*None or the interface is disabled */
CY_CLASS_CDC = 0x02, /*CDC ACM class*/
CY_CLASS_PHDC = 0x0F, /*PHDC class */
CY_CLASS_VENDOR = 0xFF /*VENDOR specific class*/
} CY_DEVICE_CLASS;
In vendor mode both the device classes are Vendor class. so it returns with 255 (0xFF h)
c) CY_DEVICE_SERIAL_BLOCK is an enum which returns the Serial Block number of a particular device bound to Vendor driver.
typedef enum _CY_DEVICE_SERIAL_BLOCK
{
SerialBlock_SCB0 = 0, /*Serial Block Number 0*/
SerialBlock_SCB1, /*Serial Block Number 1*/
SerialBlock_MFG /*Serial Block Manufacturing Interface.*/
} CY_DEVICE_SERIAL_BLOCK;
CY_MAX_DEVICE_INTERFACE
this is the maximum value of configurable interfaces possible.
As in case of CY_DEVICE_TYPE the maximum value that can be returned is 5 i.e. for the Manufacturing mode.
4) the device block is also an enum. It represents the present driver interface instance that is associated with a serial block.
5) Your information is correct. When the device is configured for CDC interface there will be only one vendor interface bounded to the vendor driver i.e. vendor MFG which returns device type as 5 (from the enum CY_DEVICE_TYPE) and the serial block is 2 (from the enum CY_DEVICE_SERIAL_BLOCK) the other interface comes under the COM port and as a Serial Adapter.( refer Fig 1 and Fig 2)
Fig 1.(Vendor protocol)
Fig 2.(CDC protocol)
Best Regards
Yatheesh
