CdcKit Drivers
Detailed Description
Implements USB Communication Device Class (CDC).
CDC implementation.
The source code of the CDC implementation resides in kits/common/drivers/cdc.c and cdc.h . This driver implements a basic USB to RS232 bridge.
CDC device configuration options.
This section contains a description of the configuration options for the driver. The options are #define's which are expected to be found in the application "usbconfig.h" header file. The values shown below are from the Giant Gecko DK3750 CDC example.
// USB interface numbers. Interfaces are numbered from zero to one less than // the number of concurrent interfaces supported by the configuration. A CDC // device is by itself a composite device and has two interfaces. // The interface numbers must be 0 and 1 for a standalone CDC device, for a // composite device which includes a CDC interface it must not be in conflict // with other device interfaces. #define CDC_CTRL_INTERFACE_NO ( 0 ) #define CDC_DATA_INTERFACE_NO ( 1 ) // Endpoint address for CDC data reception. #define CDC_EP_DATA_OUT ( 0x01 ) // Endpoint address for CDC data transmission. #define CDC_EP_DATA_IN ( 0x81 ) // Endpoint address for the notification endpoint (not used). #define CDC_EP_NOTIFY ( 0x82 ) // Timer id, see USBTIMER in the USB device stack documentation. // The CDC driver has a Rx timeout functionality which require a timer. #define CDC_TIMER_ID ( 0 ) // DMA related macros, select DMA channels and DMA request signals. #define CDC_UART_TX_DMA_CHANNEL ( 0 ) #define CDC_UART_RX_DMA_CHANNEL ( 1 ) #define CDC_TX_DMA_SIGNAL DMAREQ_UART1_TXBL #define CDC_RX_DMA_SIGNAL DMAREQ_UART1_RXDATAV // UART/USART selection macros. #define CDC_UART UART1 #define CDC_UART_CLOCK cmuClock_UART1 #define CDC_UART_ROUTE ( UART_ROUTE_RXPEN | UART_ROUTE_TXPEN | \ UART_ROUTE_LOCATION_LOC2 ) #define CDC_UART_TX_PORT gpioPortB #define CDC_UART_TX_PIN 9 #define CDC_UART_RX_PORT gpioPortB #define CDC_UART_RX_PIN 10 // Activate the RS232 switch on DK's. #define CDC_ENABLE_DK_UART_SWITCH() BSP_PeripheralAccess(BSP_RS232_UART, true) // No RS232 switch on STK's. Leave the definition "empty". #define CDC_ENABLE_DK_UART_SWITCH()
Functions |
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void | CDC_Init (void) |
CDC device initialization.
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int | CDC_SetupCmd (const USB_Setup_TypeDef *setup) |
Handle USB setup commands. Implements CDC class specific commands.
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void | CDC_StateChangeEvent (USBD_State_TypeDef oldState, USBD_State_TypeDef newState) |
Callback function called each time the USB device state is changed. Starts CDC operation when device has been configured by USB host.
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Function Documentation
int CDC_SetupCmd | ( | const USB_Setup_TypeDef * |
setup
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) |
Handle USB setup commands. Implements CDC class specific commands.
- Parameters
-
[in] setup
Pointer to the setup packet received.
- Returns
- USB_STATUS_OK if command accepted. USB_STATUS_REQ_UNHANDLED when command is unknown, the USB device stack will handle the request.
Definition at line
183
of file
cdc.c
.
void CDC_StateChangeEvent | ( | USBD_State_TypeDef |
oldState,
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USBD_State_TypeDef |
newState
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||
) |
Callback function called each time the USB device state is changed. Starts CDC operation when device has been configured by USB host.
- Parameters
-
[in] oldState
The device state the device has just left. [in] newState
The new device state.
Definition at line
236
of file
cdc.c
.