118 lines
4.4 KiB
C++
118 lines
4.4 KiB
C++
#ifndef DEVICECOMMUNICATIONIF_H_
|
|
#define DEVICECOMMUNICATIONIF_H_
|
|
|
|
#include <framework/devicehandlers/CookieIF.h>
|
|
#include <framework/devicehandlers/DeviceHandlerIF.h>
|
|
#include <framework/returnvalues/HasReturnvaluesIF.h>
|
|
/**
|
|
* @defgroup interfaces Interfaces
|
|
* @brief Interfaces for flight software objects
|
|
*/
|
|
|
|
/**
|
|
* @defgroup comm Communication
|
|
* @brief Communication software components.
|
|
*/
|
|
|
|
/**
|
|
* @brief This is an interface to decouple device communication from
|
|
* the device handler to allow reuse of these components.
|
|
* @details
|
|
* Documentation: Dissertation Baetz p.138.
|
|
* It works with the assumption that received data
|
|
* is polled by a component. There are four generic steps of device communication:
|
|
*
|
|
* 1. Send data to a device
|
|
* 2. Get acknowledgement for sending
|
|
* 3. Request reading data from a device
|
|
* 4. Read received data
|
|
*
|
|
* To identify different connection over a single interface can return
|
|
* so-called cookies to components.
|
|
* The CommunicationMessage message type can be used to extend the functionality of the
|
|
* ComIF if a separate polling task is required.
|
|
* @ingroup interfaces
|
|
* @ingroup comm
|
|
*/
|
|
class DeviceCommunicationIF: public HasReturnvaluesIF {
|
|
public:
|
|
static const uint8_t INTERFACE_ID = CLASS_ID::DEVICE_COMMUNICATION_IF;
|
|
|
|
//!< This is used if no read request is to be made by the device handler.
|
|
static const ReturnValue_t NO_READ_REQUEST = MAKE_RETURN_CODE(0x01);
|
|
//! General protocol error. Define more concrete errors in child handler
|
|
static const ReturnValue_t PROTOCOL_ERROR = MAKE_RETURN_CODE(0x02);
|
|
//! If cookie is a null pointer
|
|
static const ReturnValue_t NULLPOINTER = MAKE_RETURN_CODE(0x03);
|
|
static const ReturnValue_t INVALID_COOKIE_TYPE = MAKE_RETURN_CODE(0x04);
|
|
// is this needed if there is no open/close call?
|
|
static const ReturnValue_t NOT_ACTIVE = MAKE_RETURN_CODE(0x05);
|
|
static const ReturnValue_t TOO_MUCH_DATA = MAKE_RETURN_CODE(0x06);
|
|
|
|
virtual ~DeviceCommunicationIF() {}
|
|
|
|
/**
|
|
* @brief Device specific initialization, using the cookie.
|
|
* @details
|
|
* The cookie is already prepared in the factory. If the communication
|
|
* interface needs to be set up in some way and requires cookie information,
|
|
* this can be performed in this function, which is called on device handler
|
|
* initialization.
|
|
* @param cookie
|
|
* @return -@c RETURN_OK if initialization was successfull
|
|
* - Everything else triggers failure event with returnvalue as parameter 1
|
|
*/
|
|
virtual ReturnValue_t initializeInterface(CookieIF * cookie) = 0;
|
|
|
|
/**
|
|
* Called by DHB in the SEND_WRITE doSendWrite().
|
|
* This function is used to send data to the physical device
|
|
* by implementing and calling related drivers or wrapper functions.
|
|
* @param cookie
|
|
* @param data
|
|
* @param len
|
|
* @return -@c RETURN_OK for successfull send
|
|
* - Everything else triggers failure event with returnvalue as parameter 1
|
|
*/
|
|
virtual ReturnValue_t sendMessage(CookieIF *cookie, const uint8_t * sendData,
|
|
size_t sendLen) = 0;
|
|
|
|
/**
|
|
* Called by DHB in the GET_WRITE doGetWrite().
|
|
* Get send confirmation that the data in sendMessage() was sent successfully.
|
|
* @param cookie
|
|
* @return -@c RETURN_OK if data was sent successfull
|
|
* - Everything else triggers falure event with returnvalue as parameter 1
|
|
*/
|
|
virtual ReturnValue_t getSendSuccess(CookieIF *cookie) = 0;
|
|
|
|
/**
|
|
* Called by DHB in the SEND_WRITE doSendRead().
|
|
* It is assumed that it is always possible to request a reply
|
|
* from a device. If a requestLen of 0 is supplied, no reply was enabled
|
|
* and communication specific action should be taken (e.g. read nothing
|
|
* or read everything).
|
|
*
|
|
* @param cookie
|
|
* @param requestLen Size of data to read
|
|
* @return -@c RETURN_OK to confirm the request for data has been sent.
|
|
* - Everything else triggers failure event with returnvalue as parameter 1
|
|
*/
|
|
virtual ReturnValue_t requestReceiveMessage(CookieIF *cookie, size_t requestLen) = 0;
|
|
|
|
/**
|
|
* Called by DHB in the GET_WRITE doGetRead().
|
|
* This function is used to receive data from the physical device
|
|
* by implementing and calling related drivers or wrapper functions.
|
|
* @param cookie
|
|
* @param data
|
|
* @param len
|
|
* @return @c RETURN_OK for successfull receive
|
|
* - Everything else triggers failure event with returnvalue as parameter 1
|
|
*/
|
|
virtual ReturnValue_t readReceivedMessage(CookieIF *cookie, uint8_t **buffer,
|
|
size_t *size) = 0;
|
|
};
|
|
|
|
#endif /* DEVICECOMMUNICATIONIF_H_ */
|