Hello,
I'm having a issue with the comunication and i cant really figure out why. It only happens from time to time and blocks the communication ( it stops receiving data ).
I'm using a RS485 transciever to receive the data requests from other device. most of the time i am able to receive and send the data without any problem but it sometimes enters on somekind of state where it stops receiving new data.
This is what i had on the array when the comunication blocked:
the data should be 7 byte long starting with the SOF 0x01 and ending with EOF 0x04.
Although the last byte received was 0x04 the counter ( contaComB ) didnt reset and i couldnt get any other data.
Is there any flag that i should be watching and/or reset ?
Atached is the scibRxFifoIsr and the scib config.
interrupt void scibRxFifoIsr(void)
{
charUSARTB[contaComB] = ScibRegs.SCIRXBUF.all;
if( (charUSARTB[contaComB++] == 0x04)) //EOF
{
charUSARTB[contaComB]='\0';
contaComB=0;
receive_completeB=1;
}
else
{
if(contaComB>7) // if it receives data bigger than 7 bytes it reset the counter
{
// Reseta o array
for(contaComB = 0; contaComB <=9; contaComB++)
{
charUSARTB[contaComB] = 0x0000;
}
contaComB = 0;
}
}
ScibRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag
ScibRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag
PieCtrlRegs.PIEACK.all|=PIEACK_GROUP9; // Issue PIE ack
}
void scib_config(void) // SCI-B
{
EALLOW;
ScibRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
ScibRegs.SCICTL1.all = 0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
ScibRegs.SCICTL2.bit.TXINTENA =1; // enable TXRDY interrupt
ScibRegs.SCICTL2.bit.RXBKINTENA =1; // enable RXDY/BRKDT interrupt
//
// SCIA at 9600 baud
// @LSPCLK = 50 MHz (200 MHz SYSCLK) HBAUD = 0x02 and LBAUD = 0x8B.
// @LSPCLK = 30 MHz (120 MHz SYSCLK) HBAUD = 0x01 and LBAUD = 0x86.
//
// 115200
ScibRegs.SCIHBAUD.all = 0x0000;
ScibRegs.SCILBAUD.all = 0x0035;// 6D;
ScibRegs.SCICCR.bit.LOOPBKENA = 0 ; // Disable loop back
ScibRegs.SCIFFTX.all = 0xC001;
ScibRegs.SCIFFRX.all = 0x0021;
ScibRegs.SCIFFCT.all = 0x00;
ScibRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
ScibRegs.SCIFFTX.bit.TXFIFORESET = 1;
ScibRegs.SCIFFRX.bit.RXFIFORESET = 1;
EDIS;
}
Thank you for the help.
