// -----------------------------------------------------------------------------
//! \brief This routine is used to handle an MRDY transition from a task
//! context. Certain operations such as UART_read() cannot be
//! performed from a HWI context
//!
//! \return void
// -----------------------------------------------------------------------------
void NPITL_handleRemRdyEvent(void)
{
_npiCSKey_t key;
key = NPIUtil_EnterCS();
//If the UART port is closed, then open it
if(HS_GPIO_STATE & handshakingState)
{
NPITL_setPM();
//Close the GPIO, then
//Open the UART
PIN_close(hNpiHandshakePins);
transportOpen(npiTLParams.portBoardID,
&npiTLParams.portParams.uartParams,
NPITL_transmissionCallBack, NPITL_chirpRecievedCB);
handshakingState |= HS_WAITFORCHIRP|HS_UART_STATE;
//Clear GPIO flag, we are no longer in this state
handshakingState &= ~HS_GPIO_STATE;
}
else
{
//Once UART is open
//Handle the RemRdy Event
transportRemRdyEvent();
}
NPIUtil_ExitCS(key);
}
// -----------------------------------------------------------------------------
//! \brief This is a HWI function handler for the MRDY pin. Some MRDY
//! functionality can execute from this HWI context. Others
//! must be executed from task context hence the taskCBs.remRdyCB()
//!
//! \param[in] hPin - PIN Handle
//! \param[in] pinId - ID of pin that triggered HWI
//!
//! \return void
// -----------------------------------------------------------------------------
static void NPITL_remRdyPINHwiFxn(PIN_Handle hPin, PIN_Id pinId)
{
// The pin driver does not currently support returning whether the int
// was neg or pos edge so we must use a variable to keep track of state.
remRdy_state ^= 1;
if (remRdy_state == 0)
{
mrdyPktStamp = txPktCount;
NPITL_setPM();
}
else
{
transportStopTransfer();
npiRxActive = FALSE;
}
// Signal to registered task that Rem Ready signal has changed state
if (taskCBs.remRdyCB)
{
taskCBs.remRdyCB(remRdy_state);
}
// Check the physical state of the pin to see if it matches the variable
// state. If not trigger another task call back
if (remRdy_state != PIN_getInputValue(remRdyPIN))
{
remRdy_state = PIN_getInputValue(remRdyPIN);
if (taskCBs.remRdyCB)
{
taskCBs.remRdyCB(remRdy_state);
}
}
}
// -----------------------------------------------------------------------------
//! \brief This is a HWI function handler for the MRDY pin. Some MRDY
//! functionality can execute from this HWI context. Others
//! must be executed from task context hence the taskCBs.remRdyCB()
//!
//! \param[in] hPin - PIN Handle
//! \param[in] pinId - ID of pin that triggered HWI
//!
//! \return void
// -----------------------------------------------------------------------------
static void NPITL_remRdyPINHwiFxn(PIN_Handle hPin, PIN_Id pinId)
{
NPITL_setPM();
// Signal to registered task that Rem Ready signal has changed state
if (taskCBs.remRdyCB)
{
taskCBs.remRdyCB(remRdy_state);
}
}
// -----------------------------------------------------------------------------
//! \brief This is a HWI function handler for the UART Rx pin. It will wake
//! the TL and signal the app to open the TL by closing UART and
//! opening the GPIO
//!
//! \param[in] hPin - PIN Handle
//! \param[in] pinId - ID of pin that triggered HWI
//!
//! \return void
// -----------------------------------------------------------------------------
static void NPITL_rxPinHwiFxn(PIN_Handle hPin, PIN_Id pinId)
{
NPITL_setPM();
// Signal to registered task that TL is awake, needs to open
if (taskCBs.tlOpenCB)
{
taskCBs.tlOpenCB();
}
}
// -----------------------------------------------------------------------------
//! \brief This routine calls the UART transport open
//!
//! \param[in] initiatorState - Whether the UART is being opened by initiator
//! or responder. 1 - initiator 0 - responsder
//!
//! \return void
// -----------------------------------------------------------------------------
void NPITL_openTransportPort(hsTransactionRole role)
{
NPITL_setPM();
// Close the RxPin
PIN_close(hNpiUartRxPin);
transportOpen(npiTLParams.portBoardID,
&npiTLParams.portParams.uartParams, role);
trasnportLayerState = TL_busy;
}
// -----------------------------------------------------------------------------
//! \brief This is a HWI function handler for the MRDY pin. Some MRDY
//! functionality can execute from this HWI context. Others
//! must be executed from task context hence the taskMrdyCB()
//!
//! \param[in] hPin - PIN Handle
//! \param[in] pinId - ID of pin that triggered HWI
//!
//! \return void
// -----------------------------------------------------------------------------
static void NPITL_MRDYPinHwiFxn(PIN_Handle hPin, PIN_Id pinId)
{
// The pin driver does not currently support returning whether the int
// was neg or pos edge so we must use a variable to keep track of state.
// If the physical state of the pin was used then a very quick toggle of
// of MRDY could be missed.
mrdy_state ^= 1;
if (mrdy_state == 0)
{
mrdyPktStamp = txPktCount;
NPITL_setPM();
if ( taskMrdyCB )
{
taskMrdyCB();
}
}
else
{
transportStopTransfer();
}
// Check the physical state of the pin to see if it matches the variable
// state. If not then edge has been missed
if (mrdy_state != PIN_getInputValue(MRDY_PIN))
{
mrdy_state = PIN_getInputValue(MRDY_PIN);
if (mrdy_state == 0)
{
mrdyPktStamp = txPktCount;
NPITL_setPM();
if (taskMrdyCB)
{
taskMrdyCB();
}
}
else
{
transportStopTransfer();
}
}
}
// -----------------------------------------------------------------------------
//! \brief This routine initializes the transport layer and opens the port
//! of the device. Note that based on project defines, either the
//! UART, or SPI driver can be used.
//!
//! \param[in] params - Transport Layer parameters
//!
//! \return void
// -----------------------------------------------------------------------------
void NPITL_openTL(NPITL_Params *params)
{
_npiCSKey_t key;
key = NPIUtil_EnterCS();
// Set NPI Task Call backs
memcpy(&taskCBs, ¶ms->npiCallBacks, sizeof(params->npiCallBacks));
// Allocate memory for Transport Layer Tx/Rx buffers
npiBufSize = params->npiTLBufSize;
npiRxBuf = NPIUTIL_MALLOC(params->npiTLBufSize);
memset(npiRxBuf, 0, npiBufSize);
npiTxBuf = NPIUTIL_MALLOC(params->npiTLBufSize);
memset(npiTxBuf, 0, npiBufSize);
// This will be updated to be able to select SPI/UART TL at runtime
// Now only compile time with the NPI_USE_[UART,SPI] flag
#if defined(NPI_USE_UART)
transportOpen(params->portBoardID,
¶ms->portParams.uartParams,
NPITL_transmissionCallBack);
#elif defined(NPI_USE_SPI)
transportOpen(params->portBoardID,
¶ms->portParams.spiParams,
NPITL_transmissionCallBack);
#endif //NPI_USE_UART
#if (NPI_FLOW_CTRL == 1)
// Assign PIN IDs to remRdy and locRrdy
#ifdef NPI_MASTER
remRdyPIN = (params->srdyPinID & IOC_IOID_MASK);
locRdyPIN = (params->mrdyPinID & IOC_IOID_MASK);
#else
remRdyPIN = (params->mrdyPinID & IOC_IOID_MASK);
locRdyPIN = (params->srdyPinID & IOC_IOID_MASK);
#endif //NPI_MASTER
// Add PIN IDs to PIN Configuration
npiHandshakePinsCfg[REM_RDY_PIN_IDX] |= remRdyPIN;
npiHandshakePinsCfg[LOC_RDY_PIN_IDX] |= locRdyPIN;
// Initialize LOCRDY/REMRDY. Enable int after callback registered
hNpiHandshakePins = PIN_open(&npiHandshakePins, npiHandshakePinsCfg);
PIN_registerIntCb(hNpiHandshakePins, NPITL_remRdyPINHwiFxn);
PIN_setConfig(hNpiHandshakePins,
PIN_BM_IRQ,
remRdyPIN | PIN_IRQ_BOTHEDGES);
// Enable wakeup
PIN_setConfig(hNpiHandshakePins,
PINCC26XX_BM_WAKEUP,
remRdyPIN | PINCC26XX_WAKEUP_NEGEDGE);
remRdy_state = PIN_getInputValue(remRdyPIN);
// If MRDY is already low then we must initiate a read because there was
// a prior MRDY negedge that was missed
if (!remRdy_state)
{
NPITL_setPM();
if (taskCBs.remRdyCB)
{
transportRemRdyEvent();
LocRDY_ENABLE();
}
}
#endif // NPI_FLOW_CTRL = 1
#if (NPI_FLOW_CTRL == 0)
// This call will start repeated Uart Reads when Power Savings is disabled
transportRead();
#endif // NPI_FLOW_CTRL = 0
NPIUtil_ExitCS(key);
}
