/************************************************************************
* LOCAL MAILBOX FUNCTIONS
***********************************************************************/
void IPC_resetMbxFlag(mbxId_t mbxNum) {
// on cortex M4/M3 use primask
// on cortex M0 disable interrupts globally
IRQ_LOCK_KEY
_lockInts();
mbxFlags[mbxNum] = NO_MSG;
_unlockInts();
}
/************************************************************************
* LOCAL INTERRUPT FUNCTIONS
***********************************************************************/
void IPC_resetIntFlag(void) {
/* on cortex M4/M3 use primask */
/* on cortex M0 disable interrupts globally */
IRQ_LOCK_KEY
_lockInts();
intFlag = NO_MSG;
_unlockInts();
}
/* change the local mailbox status */
void _setMbxStatus(mbxId_t mbxNum, mbxStat_t status)
{
// if cortex M4/M3 use primask, else disable interrupts globally
IRQ_LOCK_KEY
Mbx* lPtr = (Mbx*) (mbxLocalTablePtr);
lPtr += mbxNum;
_lockInts();
lPtr->mbxStatus = status;
if((status == READY) || (status == ERROR_OCCURRED)) mbxFlags[mbxNum] = NO_MSG;
__DSB(); /* sync the data */
_unlockInts();
}
/* after the command is retrieved, the queue contents are invalidated */
qStat IPC_masterPopMsg(maxMsg_t* item)
{
IRQ_LOCK_KEY
msg_t msg;
msgToken *rP, *wP, *eA, *sA;
rP = msgBlockAddress->msgRdPtr;
wP = msgBlockAddress->msgWrPtr;
if(rP == wP) {
_lockInts();
msgPending = NO_TOKEN;
_unlockInts();
return(QEMPTY);
};
msg = IPC_getMsgType(rP);
eA = msgBlockAddress->msgQendAddress;
sA = msgBlockAddress->msgQstartAddress;
switch(msg) {
case MSG_SRV:
*((srvMsg*) item) = *((srvMsg*)rP);
*rP = INVALID_SRV_MSG; /* invalidate the data */
if(++rP > eA) rP = sA;
break;
case MSG_RD:
/* check for roll over */
if((rP+1) > eA) {
((msgToken*)item)->msgClass.rawMsgWord = rP->msgClass.rawMsgWord;
*rP = INVALID_MSG_TOKEN;
rP = sA; /* roll over the pointer */
/* read the parameter as uint_32 */
((rdMsg*) item)->param = *((uint32_t*)rP);
*rP = INVALID_MSG_TOKEN;
if(++rP > eA) rP = sA; /* update again the read pointer and roll over if needed */
}
else {
/* can read the parameter as for the message type */
*((rdMsg*) item) = *((rdMsg*)rP);
*((rdMsg*)rP) = INVALID_RD_MSG;
if(++rP > eA) rP = sA; /* do it twice because of the size */
if(++rP > eA) rP = sA;
}
break;
case MSG_RD_STS:
*((rdStsMsg*) item) = *((rdStsMsg*)rP);
*rP = INVALID_RD_STS_MSG; /* invalidate the data */
if(++rP > eA) rP = sA;
break;
case MSG_WR_STS:
*((wrStsMsg*) item) = *((wrStsMsg*)rP);
*rP = INVALID_WR_STS_MSG; /* invalidate the data */
if(++rP > eA) rP = sA;
break;
case INVALID_MSG:
*rP = INVALID_MSG_TOKEN; /* just invalidate a single item to try to recover */
if(++rP > eA) rP = sA; /* update the read pointer by one and roll over if needed */
msgBlockAddress->msgRdPtr = rP;
/* fall through by purpose, let application know there was an error */
default:
return(QERROR);
};
msgBlockAddress->msgRdPtr = rP;
return(QVALID);
}
/* after the command is retrieved, the queue contents are invalidated */
qStat IPC_slavePopCmd(maxCmd_t* item)
{
IRQ_LOCK_KEY
cmd_t cmd;
cmdToken *rP, *wP, *eA, *sA;
rP = cmdBlockAddress->cmdRdPtr;
wP = cmdBlockAddress->cmdWrPtr;
if(rP == wP) {
_lockInts();
cmdPending = NO_TOKEN;
_unlockInts();
return(QEMPTY);
};
cmd = IPC_getCmdType(rP);
eA = cmdBlockAddress->cmdQendAddress;
sA = cmdBlockAddress->cmdQstartAddress;
switch(cmd) {
case CMD_RD_ID:
*((rdCmd*) item) = *((rdCmd*)rP);
*rP = INVALID_RD_CMD; /* invalidate the data */
if(++rP > eA) rP = sA;
break;
case CMD_WR_ID:
/* check for roll over */
if((rP+1) > eA) {
((cmdToken*)item)->cmdClass.rawCmdWord = rP->cmdClass.rawCmdWord;
*rP = INVALID_CMD_TOKEN;
rP = sA; /* roll over the pointer */
/* read the parameter as uint_32 */
((wrCmd*) item)->param = *((uint32_t*) rP);
*rP = INVALID_CMD_TOKEN;
if(++rP > eA) rP = sA; /* update again the read pointer and roll over if needed */
}
else {
/* can read the parameter as for the message type */
*((wrCmd*) item) = *((wrCmd*)rP);
*((wrCmd*)rP) = INVALID_WR_CMD;
if(++rP > eA) rP = sA; /* do it twice because of the size */
if(++rP > eA) rP = sA;
}
break;
case INVALID_CMD:
*rP = INVALID_CMD_TOKEN; /* just invalidate a single item to try to recover */
if(++rP > eA) rP = sA; /* update the read pointer by one and roll over if needed */
cmdBlockAddress->cmdRdPtr = rP;
/* fall through by purpose, let application know there was an error */
default:
return(QERROR);
};
cmdBlockAddress->cmdRdPtr = rP;
return(QVALID);
}