Robin Mueller
e6d8d24cd5
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130 lines
4.3 KiB
C++
130 lines
4.3 KiB
C++
#ifndef MISSION_OBC_CCSDSIPCOREBRIDGE_H_
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#define MISSION_OBC_CCSDSIPCOREBRIDGE_H_
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#include <fsfw/tmtcservices/TmTcBridge.h>
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#include <fsfw_hal/common/gpio/gpioDefinitions.h>
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#include <fsfw_hal/linux/gpio/LinuxLibgpioIF.h>
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#include <cstring>
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#include "OBSWConfig.h"
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/**
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* @brief This class handles the interfacing to the telemetry (PTME) and telecommand (PDEC) IP
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* cores responsible for the CCSDS encoding and decoding. The IP cores are implemented
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* on the programmable logic and are accessible through the linux UIO driver.
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*/
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class CCSDSIPCoreBridge : public TmTcBridge {
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public:
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/**
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* @brief Constructor
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*
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* @param objectId
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* @param tcDestination
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* @param tmStoreId
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* @param tcStoreId
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* @param uioPtme Name of the uio device file which provides access to the PTME IP Core.
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* @param papbBusyId The ID of the GPIO which is connected to the PAPBBusy_N signal of the
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* PTME IP Core. A low logic level indicates the PTME is not ready to
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* receive more data.
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* @param papbEmptyId The ID of the GPIO which is connected to the PAPBEmpty signal of the
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* PTME IP Core. The signal is high when there are no packets in the
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* external buffer memory (BRAM).
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*/
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CCSDSIPCoreBridge(object_id_t objectId, object_id_t tcDestination, object_id_t tmStoreId,
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object_id_t tcStoreId, LinuxLibgpioIF* gpioComIF, std::string uioPtme,
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gpioId_t papbBusyId, gpioId_t papbEmptyId);
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virtual ~CCSDSIPCoreBridge();
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ReturnValue_t initialize() override;
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protected:
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/**
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* Overwriting this function to provide the capability of testing the PTME IP Core
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* implementation.
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*/
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virtual ReturnValue_t handleTm() override;
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virtual ReturnValue_t sendTm(const uint8_t* data, size_t dataLen) override;
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private:
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static const uint8_t INTERFACE_ID = CLASS_ID::CCSDS_IP_CORE_BRIDGE;
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static const ReturnValue_t PAPB_BUSY = MAKE_RETURN_CODE(0xA0);
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/** Size of mapped address space. 4k (minimal size of pl device) */
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// static const int MAP_SIZE = 0xFA0;
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static const int MAP_SIZE = 0x1000;
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/**
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* Configuration bits:
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* bit[1:0]: Size of data (1,2,3 or 4 bytes). 1 Byte <=> b00
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* bit[2]: Set this bit to 1 to abort a transfered packet
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* bit[3]: Signals to PTME the start of a new telemetry packet
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*/
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static const uint32_t PTME_CONFIG_START = 0x8;
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/**
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* Writing this word to the ptme base address signals to the PTME that a complete tm packet has
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* been transferred.
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*/
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static const uint32_t PTME_CONFIG_END = 0x0;
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/**
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* Writing to this offset within the PTME memory space will insert data for encoding to the
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* PTME IP core.
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* The address offset is 0x400 (= 4 * 256)
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*/
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static const int PTME_DATA_REG_OFFSET = 256;
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LinuxLibgpioIF* gpioComIF = nullptr;
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/** The uio device file related to the PTME IP Core */
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std::string uioPtme;
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/** Pulled to low when PTME not ready to receive data */
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gpioId_t papbBusyId = gpio::NO_GPIO;
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/** High when externally buffer memory of PTME is empty */
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gpioId_t papbEmptyId = gpio::NO_GPIO;
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/** The file descriptor of the UIO driver */
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int fd;
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uint32_t* ptmeBaseAddress = nullptr;
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/**
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* @brief This function sends the config byte to the PTME IP Core to initiate a packet
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* transfer.
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*/
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void startPacketTransfer();
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/**
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* @brief This function sends the config byte to the PTME IP Core to signal the end of a
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* packet transfer.
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*/
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void endPacketTransfer();
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/**
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* @brief This function reads the papb busy signal indicating whether the PAPB interface is
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* ready to receive more data or not. PAPB is ready when PAPB_Busy_N == '1'.
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*
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* @return RETURN_OK when ready to receive data else PAPB_BUSY.
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*/
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ReturnValue_t pollPapbBusySignal();
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/**
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* @brief This function can be used for debugging to check wheter there are packets in
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* the packet buffer of the PTME or not.
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*/
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void isPtmeBufferEmpty();
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/**
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* @brief This function sends a complete telemetry transfer frame data field (1105 bytes)
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* to the input of the PTME IP Core. Can be used to test the implementation.
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*/
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ReturnValue_t sendTestFrame();
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};
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#endif /* MISSION_OBC_CCSDSIPCOREBRIDGE_H_ */
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