eive-obsw/mission/obc/CCSDSIPCoreBridge.h

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2021-05-16 19:22:04 +02:00
#ifndef MISSION_OBC_CCSDSIPCOREBRIDGE_H_
#define MISSION_OBC_CCSDSIPCOREBRIDGE_H_
#include <fsfw/tmtcservices/TmTcBridge.h>
#include <fsfw_hal/common/gpio/gpioDefinitions.h>
#include <fsfw_hal/linux/gpio/LinuxLibgpioIF.h>
#include <string.h>
/**
* @brief This class handles the interfacing to the telemetry (PTME) and telecommand (PDEC) IP
* cores responsible for the CCSDS encoding and decoding. The IP cores are implemented
* on the programmable logic and are accessible through the linux UIO driver.
*/
class CCSDSIPCoreBridge: public TmTcBridge {
public:
/**
* @brief Constructor
*
* @param objectId
* @param tcDestination
* @param tmStoreId
* @param tcStoreId
* @param uioPtme Name of the uio device file which provides access to the PTME IP Core.
* @param papbBusyId The ID of the GPIO which is connected to the PAPBBusy_N signal of the
* PTME IP Core. A low logic level indicates the PTME is not ready to
* receive more data.
* @param papbEmptyId The ID of the GPIO which is connected to the PAPBEmpty signal of the
* PTME IP Core. The signal is high when there are no packets in the
* external buffer memory (BRAM).
*/
CCSDSIPCoreBridge(object_id_t objectId, object_id_t tcDestination, object_id_t tmStoreId,
object_id_t tcStoreId, LinuxLibgpioIF* gpioComIF, std::string uioPtme,
gpioId_t papbBusyId, gpioId_t papbEmptyId);
virtual ~CCSDSIPCoreBridge();
ReturnValue_t initialize() override;
protected:
/**
* Overwriting this function for testing purpose. Function is periodically called in
* performOperation.
*/
virtual ReturnValue_t handleTm() override;
virtual ReturnValue_t sendTm(const uint8_t * data, size_t dataLen) override;
private:
static const uint8_t INTERFACE_ID = CLASS_ID::CCSDS_IP_CORE_BRIDGE;
static const ReturnValue_t PAPB_BUSY = MAKE_RETURN_CODE(0xA0);
/** Size of mapped address space. 4k (minimal size of pl device) */
static const int MAP_SIZE = 0xFA0;
/**
* Configuration bits:
* bit[1:0]: Size of data (1,2,3 or 4 bytes). 1 Byte <=> b00
* bit[2]: Set this bit to 1 to abort a transfered packet
* bit[3]: Signals to PTME the start of a new telemetry packet
*/
static const uint32_t PTME_CONFIG_START = 0x8;
/**
* Writing this word to the ptme base address signals to the PTME that a complete tm packet has
* been transferred.
*/
static const uint32_t PTME_CONFIG_END = 0x0;
/**
* Writing to this offset within the PTME memory space will insert data for encoding to the
* PTME IP core.
*/
static const int PTME_DATA_REG_OFFSET = 0x400;
LinuxLibgpioIF* gpioComIF = nullptr;
/** The uio device file related to the PTME IP Core */
std::string uioPtme;
/** Pulled to low when PTME not ready to receive data */
gpioId_t papbBusyId = gpio::NO_GPIO;
/** High when externally buffer memory of PTME is empty */
gpioId_t papbEmptyId = gpio::NO_GPIO;
/** The file descriptor of the UIO driver */
int fd;
/** PTME base address */
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void* ptmeBaseAddress = nullptr;
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/**
* @brief This function sends the config byte to the PTME IP Core to initiate a packet
* transfer.
*/
void startPacketTransfer();
/**
* @brief This function sends the config byte to the PTME IP Core to signal the end of a
* packet transfer.
*/
void endPacketTransfer();
/**
* @brief This function reads the papb busy signal indicating whether the PAPB interface is
* ready to receive more data or not. PAPB is ready when PAPB_Busy_N == '1'.
*
* @return RETURN_OK when ready to receive data else PAPB_BUSY.
*/
ReturnValue_t pollPapbSignal();
};
#endif /* MISSION_OBC_CCSDSIPCOREBRIDGE_H_ */