STR710 - IT HDLC

[christophe239955]

Posted on March 22, 2006 at 04:40

STR710 - IT HDLC

[christophe239955]

Posted on March 21, 2006 at 12:18

Hello,

we are sing the str710 with HDLC :

- when we are polling the HDLC receive line everything is working well like in your example

- when we want to use the HDLC IT, this IT is called forever and the exe can do nothing else : like the IT wasn't cleared? Is the HDLC It is working well?

here is the code :

init_hdlc :

HDLC_ITConfig(HDLC_RMCM|HDLC_TMCM,ENABLE);

EIC_IRQChannelPriorityConfig(HDLC_IRQChannel,4);

EIC_IRQChannelConfig(HDLC_IRQChannel,ENABLE);

void HDLC_IRQHandler(void)

{

if(HDLC_ReadInterruptStatus(HDLC_RMC))

{

if (HDLC_ReadPCRStatus(HDLC_REN)==1)

return 1;

if (HDLC_ReadInterruptStatus(HDLC_RBF))

{

HDLC_ClearInterruptStatus(HDLC_RBF);

if (HDLC_ReceiveHalfBufferStatus()== HDLC_RECV_HIGH_HALF_BUFFER_FULL)

recv_buf_addr = HDLC_RECEIVEBUFFER_BASE_HI;

}

bytecount = HDLC_RecvFrameByteCountRead ();

for(addr = recv_buf_addr; addr

{

pBufr[i] = (*(u8 *)addr);

i++;

}

//here I put data in fifo

HDLC_ClearInterruptStatus(HDLC_RBF | HDLC_RMC);

}

else if (HDLC_ReadInterruptStatus(HDLC_TMC))

{

HDLC_ClearInterruptStatus(HDLC_TMC);

}

}

Thanks

[christophe239955]

Posted on March 22, 2006 at 04:11

I added this :

instead of :

if (HDLC_ReadPCRStatus(HDLC_REN)==1)

return 1;

I put this :

if (HDLC_ReadPCRStatus(HDLC_REN)==1)

{

HDLC_ClearInterruptStatus(HDLC_RBF | HDLC_RMC);

HDLC_Recv_Control(ENABLE);

return 1;

}

In this case all the HDLC transfert is working well but I have still something strange :

our transfert is like this :

receive - answer - receive - answer etc...

and for the HDLC It I have

RMC (ok) - TMC (ok) - RMC just after TMS (?) - RMC (ok) - TMC (ok) - RMC just after TMS (?) ..

when I'm sending something i have the TMC IT in which I'm doing :

if (HDLC_ReadInterruptStatus(HDLC_TMC))

{

HDLC_ClearInterruptStatus(HDLC_TMC);

HDLC_Recv_Control(ENABLE);

}

and just after I have a RMC It but it's going to this case :

if (HDLC_ReadPCRStatus(HDLC_REN)==1)

{

HDLC_ClearInterruptStatus(HDLC_RBF | HDLC_RMC);

HDLC_Recv_Control(ENABLE);

return 1;

}

what does it means? it's receiving data from data which I send (there is no loopback)

Thanks

[christophe239955]

Posted on March 22, 2006 at 04:40

In this case all the HDLC transfert is working well but I have still something strange :

our transfert is like this :

receive - answer - receive - answer etc...

and for the HDLC It I have

RMC (ok) - TMC (ok) - RMC just after TMS (?- data n°1) - RMC (ok - data n°2) - TMC (ok) - RMC just after TMS (? - data n°3) - RMC (ok - data n°4)

I notice that :

data n°1 = data n°2

data n°3 = data n°4

but for data n°1 and data n°3 REN=1 : what does it mean?