/**
* \file
*
* \brief USB Device Communication Device Class (CDC) interface definitions.
*
* Copyright (c) 2009-2016 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit Atmel Support
*/
#ifndef _UDI_CDC_H_
#define _UDI_CDC_H_
#include "conf_usb.h"
#include "usb_protocol.h"
#include "usb_protocol_cdc.h"
#include "udd.h"
#include "udc_desc.h"
#include "udi.h"
// Check the number of port
#ifndef UDI_CDC_PORT_NB
# define UDI_CDC_PORT_NB 1
#endif
#if (UDI_CDC_PORT_NB < 1) || (UDI_CDC_PORT_NB > 7)
# error UDI_CDC_PORT_NB must be between 1 and 7
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* \addtogroup udi_cdc_group_udc
* @{
*/
//! Global structure which contains standard UDI API for UDC
extern UDC_DESC_STORAGE udi_api_t udi_api_cdc_comm;
extern UDC_DESC_STORAGE udi_api_t udi_api_cdc_data;
//@}
/**
* \ingroup udi_cdc_group
* \defgroup udi_cdc_group_desc USB interface descriptors
*
* The following structures provide predefined USB interface descriptors.
* It must be used to define the final USB descriptors.
*/
//@{
/**
* \brief Communication Class interface descriptor
*
* Interface descriptor with associated functional and endpoint
* descriptors for the CDC Communication Class interface.
*/
typedef struct {
//! Standard interface descriptor
usb_iface_desc_t iface;
//! CDC Header functional descriptor
usb_cdc_hdr_desc_t header;
//! CDC Abstract Control Model functional descriptor
usb_cdc_acm_desc_t acm;
//! CDC Union functional descriptor
usb_cdc_union_desc_t union_desc;
//! CDC Call Management functional descriptor
usb_cdc_call_mgmt_desc_t call_mgmt;
//! Notification endpoint descriptor
usb_ep_desc_t ep_notify;
} udi_cdc_comm_desc_t;
/**
* \brief Data Class interface descriptor
*
* Interface descriptor with associated endpoint descriptors for the
* CDC Data Class interface.
*/
typedef struct {
//! Standard interface descriptor
usb_iface_desc_t iface;
//! Data IN/OUT endpoint descriptors
usb_ep_desc_t ep_in;
usb_ep_desc_t ep_out;
} udi_cdc_data_desc_t;
//! CDC communication endpoints size for all speeds
#define UDI_CDC_COMM_EP_SIZE 64
//! CDC data endpoints size for FS speed (8B, 16B, 32B, 64B)
#define UDI_CDC_DATA_EPS_FS_SIZE 64
//! CDC data endpoints size for HS speed (512B only)
#define UDI_CDC_DATA_EPS_HS_SIZE 512
/**
* \name Content of interface descriptors
* Up to 7 CDC interfaces can be implemented on a USB device.
*/
//@{
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_0
#define UDI_CDC_IAD_STRING_ID_0 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_0
#define UDI_CDC_COMM_STRING_ID_0 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_0
#define UDI_CDC_DATA_STRING_ID_0 0
#endif
#define UDI_CDC_IAD_DESC_0 UDI_CDC_IAD_DESC(0)
#define UDI_CDC_COMM_DESC_0 UDI_CDC_COMM_DESC(0)
#define UDI_CDC_DATA_DESC_0_FS UDI_CDC_DATA_DESC_FS(0)
#define UDI_CDC_DATA_DESC_0_HS UDI_CDC_DATA_DESC_HS(0)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_1
#define UDI_CDC_IAD_STRING_ID_1 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_1
#define UDI_CDC_COMM_STRING_ID_1 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_1
#define UDI_CDC_DATA_STRING_ID_1 0
#endif
#define UDI_CDC_IAD_DESC_1 UDI_CDC_IAD_DESC(1)
#define UDI_CDC_COMM_DESC_1 UDI_CDC_COMM_DESC(1)
#define UDI_CDC_DATA_DESC_1_FS UDI_CDC_DATA_DESC_FS(1)
#define UDI_CDC_DATA_DESC_1_HS UDI_CDC_DATA_DESC_HS(1)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_2
#define UDI_CDC_IAD_STRING_ID_2 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_2
#define UDI_CDC_COMM_STRING_ID_2 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_2
#define UDI_CDC_DATA_STRING_ID_2 0
#endif
#define UDI_CDC_IAD_DESC_2 UDI_CDC_IAD_DESC(2)
#define UDI_CDC_COMM_DESC_2 UDI_CDC_COMM_DESC(2)
#define UDI_CDC_DATA_DESC_2_FS UDI_CDC_DATA_DESC_FS(2)
#define UDI_CDC_DATA_DESC_2_HS UDI_CDC_DATA_DESC_HS(2)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_3
#define UDI_CDC_IAD_STRING_ID_3 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_3
#define UDI_CDC_COMM_STRING_ID_3 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_3
#define UDI_CDC_DATA_STRING_ID_3 0
#endif
#define UDI_CDC_IAD_DESC_3 UDI_CDC_IAD_DESC(3)
#define UDI_CDC_COMM_DESC_3 UDI_CDC_COMM_DESC(3)
#define UDI_CDC_DATA_DESC_3_FS UDI_CDC_DATA_DESC_FS(3)
#define UDI_CDC_DATA_DESC_3_HS UDI_CDC_DATA_DESC_HS(3)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_4
#define UDI_CDC_IAD_STRING_ID_4 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_4
#define UDI_CDC_COMM_STRING_ID_4 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_4
#define UDI_CDC_DATA_STRING_ID_4 0
#endif
#define UDI_CDC_IAD_DESC_4 UDI_CDC_IAD_DESC(4)
#define UDI_CDC_COMM_DESC_4 UDI_CDC_COMM_DESC(4)
#define UDI_CDC_DATA_DESC_4_FS UDI_CDC_DATA_DESC_FS(4)
#define UDI_CDC_DATA_DESC_4_HS UDI_CDC_DATA_DESC_HS(4)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_5
#define UDI_CDC_IAD_STRING_ID_5 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_5
#define UDI_CDC_COMM_STRING_ID_5 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_5
#define UDI_CDC_DATA_STRING_ID_5 0
#endif
#define UDI_CDC_IAD_DESC_5 UDI_CDC_IAD_DESC(5)
#define UDI_CDC_COMM_DESC_5 UDI_CDC_COMM_DESC(5)
#define UDI_CDC_DATA_DESC_5_FS UDI_CDC_DATA_DESC_FS(5)
#define UDI_CDC_DATA_DESC_5_HS UDI_CDC_DATA_DESC_HS(5)
//! By default no string associated to these interfaces
#ifndef UDI_CDC_IAD_STRING_ID_6
#define UDI_CDC_IAD_STRING_ID_6 0
#endif
#ifndef UDI_CDC_COMM_STRING_ID_6
#define UDI_CDC_COMM_STRING_ID_6 0
#endif
#ifndef UDI_CDC_DATA_STRING_ID_6
#define UDI_CDC_DATA_STRING_ID_6 0
#endif
#define UDI_CDC_IAD_DESC_6 UDI_CDC_IAD_DESC(6)
#define UDI_CDC_COMM_DESC_6 UDI_CDC_COMM_DESC(6)
#define UDI_CDC_DATA_DESC_6_FS UDI_CDC_DATA_DESC_FS(6)
#define UDI_CDC_DATA_DESC_6_HS UDI_CDC_DATA_DESC_HS(6)
//@}
//! Content of CDC IAD interface descriptor for all speeds
#define UDI_CDC_IAD_DESC(port) { \
.bLength = sizeof(usb_iad_desc_t),\
.bDescriptorType = USB_DT_IAD,\
.bInterfaceCount = 2,\
.bFunctionClass = CDC_CLASS_COMM,\
.bFunctionSubClass = CDC_SUBCLASS_ACM,\
.bFunctionProtocol = CDC_PROTOCOL_V25TER,\
.bFirstInterface = UDI_CDC_COMM_IFACE_NUMBER_##port,\
.iFunction = UDI_CDC_IAD_STRING_ID_##port,\
}
//! Content of CDC COMM interface descriptor for all speeds
#define UDI_CDC_COMM_DESC(port) { \
.iface.bLength = sizeof(usb_iface_desc_t),\
.iface.bDescriptorType = USB_DT_INTERFACE,\
.iface.bAlternateSetting = 0,\
.iface.bNumEndpoints = 1,\
.iface.bInterfaceClass = CDC_CLASS_COMM,\
.iface.bInterfaceSubClass = CDC_SUBCLASS_ACM,\
.iface.bInterfaceProtocol = CDC_PROTOCOL_V25TER,\
.header.bFunctionLength = sizeof(usb_cdc_hdr_desc_t),\
.header.bDescriptorType = CDC_CS_INTERFACE,\
.header.bDescriptorSubtype = CDC_SCS_HEADER,\
.header.bcdCDC = LE16(0x0110),\
.call_mgmt.bFunctionLength = sizeof(usb_cdc_call_mgmt_desc_t),\
.call_mgmt.bDescriptorType = CDC_CS_INTERFACE,\
.call_mgmt.bDescriptorSubtype = CDC_SCS_CALL_MGMT,\
.call_mgmt.bmCapabilities = \
CDC_CALL_MGMT_SUPPORTED | CDC_CALL_MGMT_OVER_DCI,\
.acm.bFunctionLength = sizeof(usb_cdc_acm_desc_t),\
.acm.bDescriptorType = CDC_CS_INTERFACE,\
.acm.bDescriptorSubtype = CDC_SCS_ACM,\
.acm.bmCapabilities = CDC_ACM_SUPPORT_LINE_REQUESTS,\
.union_desc.bFunctionLength = sizeof(usb_cdc_union_desc_t),\
.union_desc.bDescriptorType = CDC_CS_INTERFACE,\
.union_desc.bDescriptorSubtype= CDC_SCS_UNION,\
.ep_notify.bLength = sizeof(usb_ep_desc_t),\
.ep_notify.bDescriptorType = USB_DT_ENDPOINT,\
.ep_notify.bmAttributes = USB_EP_TYPE_INTERRUPT,\
.ep_notify.wMaxPacketSize = LE16(UDI_CDC_COMM_EP_SIZE),\
.ep_notify.bInterval = 0x10,\
.ep_notify.bEndpointAddress = UDI_CDC_COMM_EP_##port,\
.iface.bInterfaceNumber = UDI_CDC_COMM_IFACE_NUMBER_##port,\
.call_mgmt.bDataInterface = UDI_CDC_DATA_IFACE_NUMBER_##port,\
.union_desc.bMasterInterface = UDI_CDC_COMM_IFACE_NUMBER_##port,\
.union_desc.bSlaveInterface0 = UDI_CDC_DATA_IFACE_NUMBER_##port,\
.iface.iInterface = UDI_CDC_COMM_STRING_ID_##port,\
}
//! Content of CDC DATA interface descriptors
#define UDI_CDC_DATA_DESC_COMMON \
.iface.bLength = sizeof(usb_iface_desc_t),\
.iface.bDescriptorType = USB_DT_INTERFACE,\
.iface.bAlternateSetting = 0,\
.iface.bNumEndpoints = 2,\
.iface.bInterfaceClass = CDC_CLASS_DATA,\
.iface.bInterfaceSubClass = 0,\
.iface.bInterfaceProtocol = 0,\
.ep_in.bLength = sizeof(usb_ep_desc_t),\
.ep_in.bDescriptorType = USB_DT_ENDPOINT,\
.ep_in.bmAttributes = USB_EP_TYPE_BULK,\
.ep_in.bInterval = 0,\
.ep_out.bLength = sizeof(usb_ep_desc_t),\
.ep_out.bDescriptorType = USB_DT_ENDPOINT,\
.ep_out.bmAttributes = USB_EP_TYPE_BULK,\
.ep_out.bInterval = 0,
#define UDI_CDC_DATA_DESC_FS(port) { \
UDI_CDC_DATA_DESC_COMMON \
.ep_in.wMaxPacketSize = LE16(UDI_CDC_DATA_EPS_FS_SIZE),\
.ep_out.wMaxPacketSize = LE16(UDI_CDC_DATA_EPS_FS_SIZE),\
.ep_in.bEndpointAddress = UDI_CDC_DATA_EP_IN_##port,\
.ep_out.bEndpointAddress = UDI_CDC_DATA_EP_OUT_##port,\
.iface.bInterfaceNumber = UDI_CDC_DATA_IFACE_NUMBER_##port,\
.iface.iInterface = UDI_CDC_DATA_STRING_ID_##port,\
}
#define UDI_CDC_DATA_DESC_HS(port) { \
UDI_CDC_DATA_DESC_COMMON \
.ep_in.wMaxPacketSize = LE16(UDI_CDC_DATA_EPS_HS_SIZE),\
.ep_out.wMaxPacketSize = LE16(UDI_CDC_DATA_EPS_HS_SIZE),\
.ep_in.bEndpointAddress = UDI_CDC_DATA_EP_IN_##port,\
.ep_out.bEndpointAddress = UDI_CDC_DATA_EP_OUT_##port,\
.iface.bInterfaceNumber = UDI_CDC_DATA_IFACE_NUMBER_##port,\
.iface.iInterface = UDI_CDC_DATA_STRING_ID_##port,\
}
//@}
/**
* \ingroup udi_group
* \defgroup udi_cdc_group USB Device Interface (UDI) for Communication Class Device (CDC)
*
* Common APIs used by high level application to use this USB class.
*
* These routines are used to transfer and control data
* to/from USB CDC endpoint.
*
* See \ref udi_cdc_quickstart.
* @{
*/
/**
* \name Interface for application with single CDC interface support
*/
//@{
/**
* \brief Notify a state change of DCD signal
*
* \param b_set DCD is enabled if true, else disabled
*/
void udi_cdc_ctrl_signal_dcd(bool b_set);
/**
* \brief Notify a state change of DSR signal
*
* \param b_set DSR is enabled if true, else disabled
*/
void udi_cdc_ctrl_signal_dsr(bool b_set);
/**
* \brief Notify a framing error
*/
void udi_cdc_signal_framing_error(void);
/**
* \brief Notify a parity error
*/
void udi_cdc_signal_parity_error(void);
/**
* \brief Notify a overrun
*/
void udi_cdc_signal_overrun(void);
/**
* \brief Gets the number of byte received
*
* \return the number of data available
*/
iram_size_t udi_cdc_get_nb_received_data(void);
/**
* \brief This function checks if a character has been received on the CDC line
*
* \return \c 1 if a byte is ready to be read.
*/
bool udi_cdc_is_rx_ready(void);
/**
* \brief Waits and gets a value on CDC line
*
* \return value read on CDC line
*/
int udi_cdc_getc(void);
/**
* \brief Reads a RAM buffer on CDC line
*
* \param buf Values read
* \param size Number of value read
*
* \return the number of data remaining
*/
iram_size_t udi_cdc_read_buf(void* buf, iram_size_t size);
/**
* \brief Non polling reads of a up to 'size' data from CDC line
*
* \param port Communication port number to manage
* \param buf Buffer where to store read data
* \param size Maximum number of data to read (size of buffer)
*
* \return the number of data effectively read
*/
iram_size_t udi_cdc_read_no_polling(void* buf, iram_size_t size);
/**
* \brief Gets the number of free byte in TX buffer
*
* \return the number of free byte in TX buffer
*/
iram_size_t udi_cdc_get_free_tx_buffer(void);
/**
* \brief This function checks if a new character sent is possible
* The type int is used to support scanf redirection from compiler LIB.
*
* \return \c 1 if a new character can be sent
*/
bool udi_cdc_is_tx_ready(void);
/**
* \brief Puts a byte on CDC line
* The type int is used to support printf redirection from compiler LIB.
*
* \param value Value to put
*
* \return \c 1 if function was successfully done, otherwise \c 0.
*/
int udi_cdc_putc(int value);
/**
* \brief Writes a RAM buffer on CDC line
*
* \param buf Values to write
* \param size Number of value to write
*
* \return the number of data remaining
*/
iram_size_t udi_cdc_write_buf(const void* buf, iram_size_t size);
//@}
/**
* \name Interface for application with multi CDC interfaces support
*/
//@{
/**
* \brief Notify a state change of DCD signal
*
* \param port Communication port number to manage
* \param b_set DCD is enabled if true, else disabled
*/
void udi_cdc_multi_ctrl_signal_dcd(uint8_t port, bool b_set);
/**
* \brief Notify a state change of DSR signal
*
* \param port Communication port number to manage
* \param b_set DSR is enabled if true, else disabled
*/
void udi_cdc_multi_ctrl_signal_dsr(uint8_t port, bool b_set);
/**
* \brief Notify a framing error
*
* \param port Communication port number to manage
*/
void udi_cdc_multi_signal_framing_error(uint8_t port);
/**
* \brief Notify a parity error
*
* \param port Communication port number to manage
*/
void udi_cdc_multi_signal_parity_error(uint8_t port);
/**
* \brief Notify a overrun
*
* \param port Communication port number to manage
*/
void udi_cdc_multi_signal_overrun(uint8_t port);
/**
* \brief Gets the number of byte received
*
* \param port Communication port number to manage
*
* \return the number of data available
*/
iram_size_t udi_cdc_multi_get_nb_received_data(uint8_t port);
/**
* \brief This function checks if a character has been received on the CDC line
*
* \param port Communication port number to manage
*
* \return \c 1 if a byte is ready to be read.
*/
bool udi_cdc_multi_is_rx_ready(uint8_t port);
/**
* \brief Waits and gets a value on CDC line
*
* \param port Communication port number to manage
*
* \return value read on CDC line
*/
int udi_cdc_multi_getc(uint8_t port);
/**
* \brief Reads a RAM buffer on CDC line
*
* \param port Communication port number to manage
* \param buf Values read
* \param size Number of values read
*
* \return the number of data remaining
*/
iram_size_t udi_cdc_multi_read_buf(uint8_t port, void* buf, iram_size_t size);
/**
* \brief Gets the number of free byte in TX buffer
*
* \param port Communication port number to manage
*
* \return the number of free byte in TX buffer
*/
iram_size_t udi_cdc_multi_get_free_tx_buffer(uint8_t port);
/**
* \brief This function checks if a new character sent is possible
* The type int is used to support scanf redirection from compiler LIB.
*
* \param port Communication port number to manage
*
* \return \c 1 if a new character can be sent
*/
bool udi_cdc_multi_is_tx_ready(uint8_t port);
/**
* \brief Puts a byte on CDC line
* The type int is used to support printf redirection from compiler LIB.
*
* \param port Communication port number to manage
* \param value Value to put
*
* \return \c 1 if function was successfully done, otherwise \c 0.
*/
int udi_cdc_multi_putc(uint8_t port, int value);
/**
* \brief Writes a RAM buffer on CDC line
*
* \param port Communication port number to manage
* \param buf Values to write
* \param size Number of value to write
*
* \return the number of data remaining
*/
iram_size_t udi_cdc_multi_write_buf(uint8_t port, const void* buf, iram_size_t size);
//@}
//@}
/**
* \page udi_cdc_quickstart Quick start guide for USB device Communication Class Device module (UDI CDC)
*
* This is the quick start guide for the \ref udi_cdc_group
* "USB device interface CDC module (UDI CDC)" with step-by-step instructions on
* how to configure and use the modules in a selection of use cases.
*
* The use cases contain several code fragments. The code fragments in the
* steps for setup can be copied into a custom initialization function, while
* the steps for usage can be copied into, e.g., the main application function.
*
* \section udi_cdc_basic_use_case Basic use case
* In this basic use case, the "USB CDC (Single Interface Device)" module is used
* with only one communication port.
* The "USB CDC (Composite Device)" module usage is described in \ref udi_cdc_use_cases
* "Advanced use cases".
*
* \section udi_cdc_basic_use_case_setup Setup steps
* \subsection udi_cdc_basic_use_case_setup_prereq Prerequisites
* \copydetails udc_basic_use_case_setup_prereq
* \subsection udi_cdc_basic_use_case_setup_code Example code
* \copydetails udc_basic_use_case_setup_code
* \subsection udi_cdc_basic_use_case_setup_flow Workflow
* \copydetails udc_basic_use_case_setup_flow
*
* \section udi_cdc_basic_use_case_usage Usage steps
*
* \subsection udi_cdc_basic_use_case_usage_code Example code
* Content of conf_usb.h:
* \code
#define UDI_CDC_ENABLE_EXT(port) my_callback_cdc_enable()
extern bool my_callback_cdc_enable(void);
#define UDI_CDC_DISABLE_EXT(port) my_callback_cdc_disable()
extern void my_callback_cdc_disable(void);
#define UDI_CDC_LOW_RATE
#define UDI_CDC_DEFAULT_RATE 115200
#define UDI_CDC_DEFAULT_STOPBITS CDC_STOP_BITS_1
#define UDI_CDC_DEFAULT_PARITY CDC_PAR_NONE
#define UDI_CDC_DEFAULT_DATABITS 8
#include "udi_cdc_conf.h" // At the end of conf_usb.h file
\endcode
*
* Add to application C-file:
* \code
static bool my_flag_autorize_cdc_transfert = false;
bool my_callback_cdc_enable(void)
{
my_flag_autorize_cdc_transfert = true;
return true;
}
void my_callback_cdc_disable(void)
{
my_flag_autorize_cdc_transfert = false;
}
void task(void)
{
if (my_flag_autorize_cdc_transfert) {
udi_cdc_putc('A');
udi_cdc_getc();
}
}
\endcode
*
* \subsection udi_cdc_basic_use_case_setup_flow Workflow
* -# Ensure that conf_usb.h is available and contains the following configuration,
* which is the USB device CDC configuration:
* - \code #define USB_DEVICE_SERIAL_NAME "12...EF" // Disk SN for CDC \endcode
* \note The USB serial number is mandatory when a CDC interface is used.
* - \code #define UDI_CDC_ENABLE_EXT(port) my_callback_cdc_enable()
extern bool my_callback_cdc_enable(void); \endcode
* \note After the device enumeration (detecting and identifying USB devices),
* the USB host starts the device configuration. When the USB CDC interface
* from the device is accepted by the host, the USB host enables this interface and the
* UDI_CDC_ENABLE_EXT() callback function is called and return true.
* Thus, when this event is received, the data transfer on CDC interface are authorized.
* - \code #define UDI_CDC_DISABLE_EXT(port) my_callback_cdc_disable()
extern void my_callback_cdc_disable(void); \endcode
* \note When the USB device is unplugged or is reset by the USB host, the USB
* interface is disabled and the UDI_CDC_DISABLE_EXT() callback function
* is called. Thus, the data transfer must be stopped on CDC interface.
* - \code #define UDI_CDC_LOW_RATE \endcode
* \note Define it when the transfer CDC Device to Host is a low rate
* (<512000 bauds) to reduce CDC buffers size.
* - \code #define UDI_CDC_DEFAULT_RATE 115200
#define UDI_CDC_DEFAULT_STOPBITS CDC_STOP_BITS_1
#define UDI_CDC_DEFAULT_PARITY CDC_PAR_NONE
#define UDI_CDC_DEFAULT_DATABITS 8 \endcode
* \note Default configuration of communication port at startup.
* -# Send or wait data on CDC line:
* - \code // Waits and gets a value on CDC line
int udi_cdc_getc(void);
// Reads a RAM buffer on CDC line
iram_size_t udi_cdc_read_buf(int* buf, iram_size_t size);
// Puts a byte on CDC line
int udi_cdc_putc(int value);
// Writes a RAM buffer on CDC line
iram_size_t udi_cdc_write_buf(const int* buf, iram_size_t size); \endcode
*
* \section udi_cdc_use_cases Advanced use cases
* For more advanced use of the UDI CDC module, see the following use cases:
* - \subpage udi_cdc_use_case_composite
* - \subpage udc_use_case_1
* - \subpage udc_use_case_2
* - \subpage udc_use_case_3
* - \subpage udc_use_case_4
* - \subpage udc_use_case_5
* - \subpage udc_use_case_6
*/
/**
* \page udi_cdc_use_case_composite CDC in a composite device
*
* A USB Composite Device is a USB Device which uses more than one USB class.
* In this use case, the "USB CDC (Composite Device)" module is used to
* create a USB composite device. Thus, this USB module can be associated with
* another "Composite Device" module, like "USB HID Mouse (Composite Device)".
*
* Also, you can refer to application note
*
* AVR4902 ASF - USB Composite Device.
*
* \section udi_cdc_use_case_composite_setup Setup steps
* For the setup code of this use case to work, the
* \ref udi_cdc_basic_use_case "basic use case" must be followed.
*
* \section udi_cdc_use_case_composite_usage Usage steps
*
* \subsection udi_cdc_use_case_composite_usage_code Example code
* Content of conf_usb.h:
* \code
#define USB_DEVICE_EP_CTRL_SIZE 64
#define USB_DEVICE_NB_INTERFACE (X+2)
#define USB_DEVICE_MAX_EP (X+3)
#define UDI_CDC_DATA_EP_IN_0 (1 | USB_EP_DIR_IN) // TX
#define UDI_CDC_DATA_EP_OUT_0 (2 | USB_EP_DIR_OUT) // RX
#define UDI_CDC_COMM_EP_0 (3 | USB_EP_DIR_IN) // Notify endpoint
#define UDI_CDC_COMM_IFACE_NUMBER_0 X+0
#define UDI_CDC_DATA_IFACE_NUMBER_0 X+1
#define UDI_COMPOSITE_DESC_T \
usb_iad_desc_t udi_cdc_iad; \
udi_cdc_comm_desc_t udi_cdc_comm; \
udi_cdc_data_desc_t udi_cdc_data; \
...
#define UDI_COMPOSITE_DESC_FS \
.udi_cdc_iad = UDI_CDC_IAD_DESC_0, \
.udi_cdc_comm = UDI_CDC_COMM_DESC_0, \
.udi_cdc_data = UDI_CDC_DATA_DESC_0_FS, \
...
#define UDI_COMPOSITE_DESC_HS \
.udi_cdc_iad = UDI_CDC_IAD_DESC_0, \
.udi_cdc_comm = UDI_CDC_COMM_DESC_0, \
.udi_cdc_data = UDI_CDC_DATA_DESC_0_HS, \
...
#define UDI_COMPOSITE_API \
&udi_api_cdc_comm, \
&udi_api_cdc_data, \
...
\endcode
*
* \subsection udi_cdc_use_case_composite_usage_flow Workflow
* -# Ensure that conf_usb.h is available and contains the following parameters
* required for a USB composite device configuration:
* - \code // Endpoint control size, This must be:
// - 8, 16, 32 or 64 for full speed device (8 is recommended to save RAM)
// - 64 for a high speed device
#define USB_DEVICE_EP_CTRL_SIZE 64
// Total Number of interfaces on this USB device.
// Add 2 for CDC.
#define USB_DEVICE_NB_INTERFACE (X+2)
// Total number of endpoints on this USB device.
// This must include each endpoint for each interface.
// Add 3 for CDC.
#define USB_DEVICE_MAX_EP (X+3) \endcode
* -# Ensure that conf_usb.h contains the description of
* composite device:
* - \code // The endpoint numbers chosen by you for the CDC.
// The endpoint numbers starting from 1.
#define UDI_CDC_DATA_EP_IN_0 (1 | USB_EP_DIR_IN) // TX
#define UDI_CDC_DATA_EP_OUT_0 (2 | USB_EP_DIR_OUT) // RX
#define UDI_CDC_COMM_EP_0 (3 | USB_EP_DIR_IN) // Notify endpoint
// The interface index of an interface starting from 0
#define UDI_CDC_COMM_IFACE_NUMBER_0 X+0
#define UDI_CDC_DATA_IFACE_NUMBER_0 X+1 \endcode
* -# Ensure that conf_usb.h contains the following parameters
* required for a USB composite device configuration:
* - \code // USB Interfaces descriptor structure
#define UDI_COMPOSITE_DESC_T \
...
usb_iad_desc_t udi_cdc_iad; \
udi_cdc_comm_desc_t udi_cdc_comm; \
udi_cdc_data_desc_t udi_cdc_data; \
...
// USB Interfaces descriptor value for Full Speed
#define UDI_COMPOSITE_DESC_FS \
...
.udi_cdc_iad = UDI_CDC_IAD_DESC_0, \
.udi_cdc_comm = UDI_CDC_COMM_DESC_0, \
.udi_cdc_data = UDI_CDC_DATA_DESC_0_FS, \
...
// USB Interfaces descriptor value for High Speed
#define UDI_COMPOSITE_DESC_HS \
...
.udi_cdc_iad = UDI_CDC_IAD_DESC_0, \
.udi_cdc_comm = UDI_CDC_COMM_DESC_0, \
.udi_cdc_data = UDI_CDC_DATA_DESC_0_HS, \
...
// USB Interface APIs
#define UDI_COMPOSITE_API \
...
&udi_api_cdc_comm, \
&udi_api_cdc_data, \
... \endcode
* - \note The descriptors order given in the four lists above must be the
* same as the order defined by all interface indexes. The interface index
* orders are defined through UDI_X_IFACE_NUMBER defines.\n
* Also, the CDC requires a USB Interface Association Descriptor (IAD) for
* composite device.
*/
#ifdef __cplusplus
}
#endif
#endif // _UDI_CDC_H_