UART rx interrupt problem

Naidu,

Have you tried looking at the uC/OS-III text book? Chapter 9 "Interrupt Management" would be very helpful to read.

Regards,

Alex

Hi Alex,

   I've gone through interrupt managent in Ucos -III but that is of no help. now i've removed Ucos form my application.

 but same problem is coming. i've attached my code here. any advice will be highly appreciated.

---Initialisation of hardware interrupt
void AFCinterruptInit(void)
{
// Configure the interrupt pin as an input and enable the pin to interrupt on
// the falling edge (i.e. when the push button is pressed).

GPIOPinTypeGPIOInput(GPIO_PORTA_BASE, GPIO_PIN_6); //AFC valid input
GPIOPinTypeGPIOInput(GPIO_PORTA_BASE, GPIO_PIN_7); //AFC lock input
// GPIOPadConfigSet(GPIO_PORTA_BASE, GPIO_PIN_6, GPIO_STRENGTH_8MA,GPIO_PIN_TYPE_STD_WPU);
GPIOIntTypeSet(GPIO_PORTA_BASE, GPIO_PIN_6, GPIO_HIGH_LEVEL);
// GPIOPinIntEnable(GPIO_PORTA_BASE, GPIO_PIN_6);
// IntEnable(INT_GPIOA);
}

----this is the interrupt handler for the hardware interrupt
----it sends the status to ECM processor after reading hardware pin
void ISROfAFCValidInterrupt( void )
{
U8 temp_afc_data[2],err,i;
extern U8 afc_lock;
extern OS_EVENT *AFCLockAmpMailboxID;
extern U8 CurrentAFCThreatID;
extern U16 AFCValIntrCount;
extern U16 IntrOccured;
extern OS_EVENT *AfcLockSem;
extern void SendAfcStatusToECMP(U8 afc_lock);
void DisableAFCValidInterrupt( );
void ReadAFCLock(U8 *result);

GPIOPinIntClear(GPIO_PORTA_BASE,GPIO_PIN_6);
IntMasterdisable();
temp_afc_data[0] = CurrentAFCThreatID;
ReadAFCLock(&temp_afc_data[1]);
SendAfcStatusToECMP(temp_afc_data[1]);
IntMasterEnble();
}

---uart interrupt handler
void ISROfSimSerialLinkInterrupt( void )
{
U8 temp_reg_value;
extern Boolean NoECMProcessor;
extern U32 UartBaseTemp;
unsigned long ulStatus;
extern void HandleSerialInterrupt( void );
CPU_SR cpu_sr;

// OSSchedLock();

// OSIntEnter();
IntMasterDisable();
//#define UARTn_BASE UART1_BASE
// IntDisable(INT_UART0);
UartBaseTemp = UART1_BASE;
NoECMProcessor = TRUE;
HandleSerialInterrupt();
IntMasterEnable();
// OSIntExit();

// OSSchedUnlock();
}

void ReadAFCLock( U8 *result )
{
*result = GPIOPinRead(GPIO_PORTA_BASE, GPIO_PIN_7); //AFC Lock pin Read
*result = *result >> 7;
}

void SendAfcStatusToECMP(U8 afc_lock)
{
U8 threat_id;
extern ThreatParameters_tag ThreatParameters[TotalNoOfThreats];
extern void SendMessageToEP( U8 threat_id, EPMsg_tag ep_msg_no );

threat_id = CurrentAFCThreatID;
if( (ThreatParameters[threat_id].Valid == TRUE) &&
(ThreatParameters[threat_id].AFCStatus != AFC_NOT_USED) &&
(threat_id == CurrentAFCThreatID) )
{

switch(ThreatParameters[threat_id].AFCStatus)
{
case AFC_ACQUISITION : if(afc_lock == TRUE )
{
// afc_lock_occured_count++;
ThreatParameters[threat_id].AFCStatus = AFC_TRACKING;
SendMessageToEP( threat_id, AFC_STATUS );

}
break;

case AFC_TRACKING : break;
case AFC_TRACK_LOST_DUMMY :
case AFC_TRACK_LOST :
case AFC_EMISSION_LOST :
if( (afc_lock) == TRUE )
{
ThreatParameters[threat_id].AFCStatus = AFC_TRACKING;
SendMessageToEP( threat_id, AFC_STATUS );
}
break;
}
}
}

void SendMessageToEP( unsigned char threat_id, EPMsg_tag ep_msg_no )
{
unsigned char temp_ep_tx_msg_buf[50];

extern ThreatParameters_tag ThreatParameters[TotalNoOfThreats];
// extern SubsystemHealth_tag SubsystemHealth;
extern void SendMessageThroLink( unsigned char *msg_ptr, unsigned char msg_length );
extern void ConvertNumberToHexString( unsigned long number, unsigned char *string_ptr,
unsigned char string_length,
Boolean reverse_string );

switch( ep_msg_no )
{
case AFC_STATUS :
temp_ep_tx_msg_buf[0] = EP_AFC_STATUS_COMMAND_CODE;
// if( threat_id < 5 )
temp_ep_tx_msg_buf[1] = threat_id + '1';

switch( ThreatParameters[threat_id].AFCStatus )
{
case AFC_ACQUISITION :
temp_ep_tx_msg_buf[2] = EP_AFC_ACQUISITION_STATUS;
break;

case AFC_TRACKING :
temp_ep_tx_msg_buf[2] = EP_AFC_TRACKING_STATUS;
break;

case AFC_TRACK_LOST :
temp_ep_tx_msg_buf[2] = EP_AFC_TRACK_LOST_STATUS;
break;

case AFC_EMISSION_LOST :
temp_ep_tx_msg_buf[2] = EP_AFC_EMISSION_LOST_STATUS;
break;
}
SendMessageThroLink( temp_ep_tx_msg_buf, (unsigned char) 3 );
break;

// case SUBSYSTEM_HEALTH_STATUS :
// temp_ep_tx_msg_buf[0] = EP_SUBSYSTEM_HEALTH_STATUS_MESSAGE;
// ConvertNumberToHexString(
// ((*((unsigned long *) &SubsystemHealth)) & 0xFFFFF),
// &temp_ep_tx_msg_buf[1], (unsigned char) 8, FALSE );
// SendMessageThroLink( temp_ep_tx_msg_buf, (unsigned char) 9 );
// break;

case TST_TXMN_FREQ_STATUS :
temp_ep_tx_msg_buf[0] = EP_TST_TXMN_FREQ_STATUS_MESSAGE;
if( threat_id < TotalNoOfMBJThreats )
{
temp_ep_tx_msg_buf[1] = 'S';
}
else
{
temp_ep_tx_msg_buf[1] = 'P';
}
temp_ep_tx_msg_buf[2] = '2';
//SendMessageThroLink( temp_ep_tx_msg_buf, (unsigned char) 3 );
break;
}
}

void SendMessageThroLink( unsigned char *msg_ptr, unsigned char msg_length )
{
U16 temp_msg_buf_idx;
U8 temp_idx;

extern TxDataQueue_tag TxDataQParameters;
extern MsgDataQueue_tag MessagesToBeSent;
extern Boolean LinkDown;

extern void PrepareDataFrame( void );

// OSSchedLock(); ---modind

/* scheduling is stopped so that task switching will
not take place. So the corruption of Msg_buf is avoided*/

temp_msg_buf_idx = MessagesToBeSent.MsgHeadIndex;
MessagesToBeSent.MsgBuf[temp_msg_buf_idx] = msg_length;

for( temp_idx=0; temp_idx < msg_length; ++temp_idx )
{
++temp_msg_buf_idx;
if( temp_msg_buf_idx >= TX_MSGS_BUF_SIZE )
temp_msg_buf_idx = 0;

MessagesToBeSent.MsgBuf[temp_msg_buf_idx]
= msg_ptr[temp_idx];
}

++temp_msg_buf_idx;
if( temp_msg_buf_idx >= TX_MSGS_BUF_SIZE )
temp_msg_buf_idx = 0;

if( MessagesToBeSent.MsgTailIndex ==
MessagesToBeSent.MsgHeadIndex )
{
MessagesToBeSent.MsgHeadIndex = temp_msg_buf_idx;
if( TxDataQParameters.DataFrameLen == 0 )
{
// OSSchedUnlock(); ---modind

if( LinkDown == FALSE )
PrepareDataFrame( );
}
// else
// OSSchedUnlock(); ---modind
}
else
{
MessagesToBeSent.MsgHeadIndex = temp_msg_buf_idx;
// OSSchedUnlock();
}

return;
}

void PrepareDataFrame( void )
{
U16 temp_msg_idx;
U8 temp_checksum, temp_tx_buf_idx, temp_idx, temp_msg_length,
temp_char;

extern TxDataQueue_tag TxDataQParameters;
extern volatile Boolean TxRunning;
extern ProtoParams_tag ProtocolParameters;
extern MsgDataQueue_tag MessagesToBeSent;

extern void StartTxmission( void );

temp_checksum = 0;

temp_msg_idx = MessagesToBeSent.MsgTailIndex;

TxDataQParameters.TxDataBuf[0] = SOF_A;
TxDataQParameters.TxDataBuf[1] = ProtocolParameters.SentFrameNo;
temp_msg_length = MessagesToBeSent.MsgBuf[temp_msg_idx];
TxDataQParameters.TxDataBuf[2] = temp_msg_length-1;

for( temp_tx_buf_idx=3; temp_tx_buf_idx < temp_msg_length + 3;
++temp_tx_buf_idx )
{
++temp_msg_idx;
if( temp_msg_idx >= TX_MSGS_BUF_SIZE )
temp_msg_idx = 0;
TxDataQParameters.TxDataBuf[temp_tx_buf_idx]
= MessagesToBeSent.MsgBuf[temp_msg_idx];
temp_checksum = temp_checksum ^
TxDataQParameters.TxDataBuf[temp_tx_buf_idx];
}

TxDataQParameters.TxDataBuf[temp_tx_buf_idx]
= temp_checksum;
temp_tx_buf_idx++;
TxDataQParameters.TxDataBuf[temp_tx_buf_idx] = EOF_A;
temp_tx_buf_idx++;

++temp_msg_idx;
if( temp_msg_idx >= TX_MSGS_BUF_SIZE )
temp_msg_idx = 0;

ProtocolParameters.NoOfRetxmns = 0;

TxDataQParameters.DataFrameLen = temp_tx_buf_idx;
TxDataQParameters.DataBufIndex = 0;
MessagesToBeSent.MsgTailIndex = temp_msg_idx;
if( TxRunning == FALSE )
{
TxRunning = TRUE;
StartTxmission( );
}

return;
}

void StartTxmission( void )
{
U32 i,count;
unsigned long j,temp_reg_value;
Boolean temp;
U8 no_of_bytes_sent = 0;

extern TxDataQueue_tag TxDataQParameters;
extern TxCntrlQueue_tag TxCntrlQParameters;
extern RxQueue_tag RxQParameters;
extern volatile Boolean TxRunning;
extern ProtoParams_tag ProtocolParameters;
extern U8 ErrorStatus;
// extern void __svc(1) serial(U8 temp);
// tsk_lock();
IntMasterDisable();
//__disable_irq();

if( TxCntrlQParameters.CntrlBufIndex == 0 )
{
ProtocolParameters.SentFrameType = CONTROL;
//serial('f');
//UARTDisable(UART0_BASE);

UARTCharPut(UartBaseTemp,TxCntrlQParameters.TxCntrlBuf[
TxCntrlQParameters.CntrlBufIndex]);
// printf("write success");
// if(temp==true)
// printf("write success");
// for(i=0;i<15000;i++);
// while(1);
// UARTEnable(UART0_BASE);
TxCntrlQParameters.CntrlBufIndex++;
}
else
{
ProtocolParameters.SentFrameType = DATA;
UARTCharPut(UartBaseTemp, TxDataQParameters.
TxDataBuf[TxDataQParameters.DataBufIndex] );

TxDataQParameters.DataBufIndex++;

// for( ;
// (TxDataQParameters.DataBufIndex <
// TxDataQParameters.DataFrameLen);
//// (no_of_bytes_sent < MAX_NO_OF_BYTES_AT_A_TIME_TXMN);
// no_of_bytes_sent++,
// TxDataQParameters.DataBufIndex++ )
// {
// UARTCharPut(UartBaseTemp,TxDataQParameters.TxDataBuf[TxDataQParameters.DataBufIndex] );
// }
// TxDataQParameters.DataBufIndex = 1;
}

// UARTTxIntModeSet(UARTn_BASE,UART_TXINT_MODE_EOT);
// temp_reg_value = UARTIntStatus(UARTn_BASE, true );
// temp_reg_value = temp_reg_value | UART_INT_TX;
// UARTIntEnable(UARTn_BASE,temp_reg_value);
//for(i=0;i<1000;i++);
//while(1){}

HandleSerialTxmission();
// UARTDisable(UartBaseTemp);
// UARTFIFODisable(UartBaseTemp) ;
// UARTEnable(UartBaseTemp);
// tsk_unlock();

IntMasterEnable();

// __enable_irq();
// while(1){}
//for(i=0;i<1000;i++);
return;
}

void HandleSerialTxmission( void )
{
U8 no_of_bytes_sent = 0, temp_reg_value;
U32 i;
INT8U perr;
INT8U *pname,terr1;
BOOLEAN err,berr;
extern U32 UartBaseTemp;
extern ProtoParams_tag ProtocolParameters;
extern TxDataQueue_tag TxDataQParameters;
extern TxCntrlQueue_tag TxCntrlQParameters;
extern OS_TMR *TxmnTOAlarmID;
extern volatile Boolean TxRunning;
extern void HandleProtocolTxmnTO(OS_TMR *ptmr, void *p_arg );
if( ProtocolParameters.SentFrameType == CONTROL )
{
for( ;
TxCntrlQParameters.CntrlBufIndex <
TxCntrlQParameters.CntrlFrameLen;
no_of_bytes_sent++,
TxCntrlQParameters.CntrlBufIndex++ )
{
UARTCharPut(UartBaseTemp,
TxCntrlQParameters.TxCntrlBuf[
TxCntrlQParameters.CntrlBufIndex] );
// for(i=0;i<15000;i++);
}

if( TxCntrlQParameters.CntrlBufIndex >=
TxCntrlQParameters.CntrlFrameLen )
{
if( TxDataQParameters.DataBufIndex <
TxDataQParameters.DataFrameLen )
ProtocolParameters.SentFrameType = DATA;
else
{
ProtocolParameters.SentFrameType = NONE;
TxRunning = FALSE;
}
}
}
else
{

for( ;
(TxDataQParameters.DataBufIndex <
TxDataQParameters.DataFrameLen);
// (no_of_bytes_sent < MAX_NO_OF_BYTES_AT_A_TIME_TXMN);
no_of_bytes_sent++,
TxDataQParameters.DataBufIndex++ )

{
UARTCharPut(UartBaseTemp,TxDataQParameters.TxDataBuf[TxDataQParameters.DataBufIndex] ); --------when i get this instruction executed iam unable to get rx interrupt
//
// Check the arguments.
//
// ASSERT(UARTBaseValid(UartBaseTemp));

//
// Wait until space is available.
//
// while(HWREG(UartBaseTemp + UART_O_FR) & UART_FR_TXFF)
// {
// }

//
// Send the char.
//
// HWREG(UartBaseTemp + UART_O_DR) = TxDataQParameters.TxDataBuf[TxDataQParameters.DataBufIndex];
}


// UARTDisable(UartBaseTemp);

//// for(i=0;i<15000;i++);
// UARTIntEnable(UartBaseTemp, UART_INT_RX | UART_INT_RT);
// UARTEnable(UartBaseTemp);
// UART1_CTL_R &= ~(UART_CTL_UARTEN | UART_CTL_TXE| UART_CTL_RXE);
// UART1_CTL_R |= (UART_CTL_UARTEN | UART_CTL_RXE);

// if( TxDataQParameters.DataBufIndex >= TxDataQParameters.DataFrameLen )
// {
// if( (ProtocolParameters.SentFrameType == DATA) )
// {
// berr = DeleteTimer(TxmnTOAlarmID);
// TxmnTOAlarmID = OSTmrCreate(10,10,OS_TMR_OPT_ONE_SHOT,HandleProtocolTxmnTO,
// (void *)0,pname,&perr);
// err = OSTmrStart(TxmnTOAlarmID,&perr); //reset alarm logic
// terr1 = OSTmrSignal();
// ProtocolParameters.RetxmissionReqd = TRUE;
// }
// if( TxCntrlQParameters.CntrlBufIndex <
// TxCntrlQParameters.CntrlFrameLen )
// ProtocolParameters.SentFrameType = CONTROL;
// else
// {
// ProtocolParameters.SentFrameType = NONE;
// TxRunning = FALSE;
// }
// }
}

if( TxRunning == FALSE )
{
UARTIntClear(UartBaseTemp, UART_INT_TX);
}

return;
}

code flow is like here:

after i got an hardware interrupt i will status to another processor.

thanks,

naidu.