97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
#ifndef DEVICECOMMUNICATIONIF_H_
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#define DEVICECOMMUNICATIONIF_H_
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#include <framework/devicehandlers/Cookie.h>
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#include <framework/devicehandlers/DeviceHandlerIF.h>
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#include <framework/returnvalues/HasReturnvaluesIF.h>
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/**
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* @defgroup interfaces Interfaces
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* @brief Interfaces for flight software objects
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*/
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/**
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* @defgroup communication comm
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* @brief Communication software components.
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*/
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/**
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* @brief This is an interface to decouple device communication from
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* the device handler to allow reuse of these components.
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* @details
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* Documentation: Dissertation Baetz p.138
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* It works with the assumption that received data
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* is polled by a component. There are four generic steps of device communication:
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*
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* 1. Send data to a device
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* 2. Get acknowledgement for sending
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* 3. Request reading data from a device
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* 4. Read received data
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*
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* To identify different connection over a single interface can return
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* so-called cookies to components.
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* The CommunicationMessage message type can be used to extend the functionality of the
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* ComIF if a separate polling task is required.
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* @ingroup interfaces
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* @ingroup comm
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*/
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class DeviceCommunicationIF: public HasReturnvaluesIF {
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public:
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static const uint8_t INTERFACE_ID = CLASS_ID::DEVICE_COMMUNICATION_IF;
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static const ReturnValue_t INVALID_COOKIE_TYPE = MAKE_RETURN_CODE(0x01);
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static const ReturnValue_t NOT_ACTIVE = MAKE_RETURN_CODE(0x02);
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static const ReturnValue_t TOO_MUCH_DATA = MAKE_RETURN_CODE(0x03);
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static const ReturnValue_t NULLPOINTER = MAKE_RETURN_CODE(0x04);
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static const ReturnValue_t PROTOCOL_ERROR = MAKE_RETURN_CODE(0x05);
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virtual ~DeviceCommunicationIF() {}
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/**
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* Called by DHB in the SEND_WRITE doSendWrite().
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* This function is used to send data to the physical device
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* by implementing and calling related drivers or wrapper functions.
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* @param cookie
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* @param data
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* @param len
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* @return -@c RETURN_OK for successfull send
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* - Everything else triggers sending failed event with
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* returnvalue as parameter 1
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*/
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virtual ReturnValue_t sendMessage(CookieIF *cookie, const uint8_t * sendData,
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size_t sendLen) = 0;
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/**
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* Called by DHB in the GET_WRITE doGetWrite().
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* Get send confirmation that the data in sendMessage() was sent successfully.
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* @param cookie
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* @return -@c RETURN_OK if data was sent successfull
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* - Everything else triggers sending failed event with
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* returnvalue as parameter 1
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*/
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virtual ReturnValue_t getSendSuccess(CookieIF *cookie) = 0;
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/**
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* Called by DHB in the SEND_WRITE doSendRead().
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* Request a reply.
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* @param cookie
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* @return
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*/
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virtual ReturnValue_t requestReceiveMessage(CookieIF *cookie, size_t requestLen) = 0;
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/**
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* Called by DHB in the GET_WRITE doGetRead().
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* This function is used to receive data from the physical device
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* by implementing and calling related drivers or wrapper functions.
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* @param cookie
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* @param data
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* @param len
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* @return @c RETURN_OK for successfull receive
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* - Everything else triggers receiving failed with
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* returnvalue as parameter 1
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*/
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virtual ReturnValue_t readReceivedMessage(CookieIF *cookie, uint8_t **buffer,
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size_t *size) = 0;
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};
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#endif /* DEVICECOMMUNICATIONIF_H_ */
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