Hi
I have already installed UART module. The Tx part of module is set to work in the form of polling and I don't have any problem with that.
but I face with a problem in RX part which is set to work with interrupt.
Following is the code that I have written for the interrupt routine.
interrupt void UART_intrDispatch(void)
{
register unsigned char i;
Uint16 eventId = 0;
asm(" BCLR INTM ");
eventId = CSL_FEXT(CSL_UART_REGS->IIR,UART_IIR_INTID);
switch (eventId)
{
case UART_EVT_RBI_IID:
case UART_EVT_CTOI_IID:
CSL_UART_REGS->LCR &= ~CSL_UART_LCR_DLAB_MASK;
while(CSL_UART_REGS->LSR & CSL_UART_LSR_DR_MASK)
{
RxS_Buf[RxS_Wrp] = CSL_UART_REGS->RBR;
RxS_Wrp++;
RxS_Wrp &= SCI_MASK;
RxS_Cnt++;
}
break;
case UART_EVT_TBEI_IID:
break;
case UART_EVT_LSI_IID:
i = CSL_UART_REGS->LSR;
i = i;
break;
}
return;
}
And Here is my UART Setup :
oid UartInit(void)
{
TxS_Act = TxS_Rdp = TxS_Wrp = TxS_Cnt = 0;
RxS_Rdp = RxS_Wrp = RxS_Cnt = RxS_Chk = 0;
SystemClk = 98304000;
/**Enable Master clock */
CSL_FINST(CSL_SYSCTRL_REGS->PCGCR1,SYS_PCGCR1_SYSCLKDIS,ACTIVE);
/**Enable uart peripheral clock gating */
CSL_FINST(CSL_SYSCTRL_REGS->PCGCR1,SYS_PCGCR1_UARTCG,ACTIVE);
/* Configure UART registers using setup structure */
Uart_setup();
/* Configuring Interrupt */
IRQ_plug (UART_EVENT, &UART_intrDispatch);
/* Enabling Interrupt */
IRQ_enable(UART_EVENT);
/* Enable the UART Events */
CSL_FINST(CSL_UART_REGS->LCR, UART_LCR_DLAB, DLABON);
CSL_FINST(CSL_UART_REGS->IER, UART_IER_ERBI,ENABLE);
// CSL_FINST(CSL_UART_REGS->IER,UART_IER_ETBEI,ENABLE);
CSL_FINST(CSL_UART_REGS->IER,UART_IER_ELSI,ENABLE);
}
//*****************************************************************************
void Uart_setup(void)
{
Uint32 value;
Uint32 clk_div;
/**Putting UART recvor and xmittor in reset state*/
CSL_UART_REGS->PWREMU_MGMT = CSL_UART_PWREMU_MGMT_RESETVAL;
/* Write 0 to DLAB to access IER*/
CSL_FINST(CSL_UART_REGS->LCR, UART_LCR_DLAB, DLABON);
/*Disable all interrupts*/
CSL_UART_REGS->IER = CSL_UART_IER_RESETVAL;
/* Flushing buffer */
value = (Uint32)(CSL_UART_REGS->RBR);
/* reset and possibly enable FIFOs */
CSL_FINST(CSL_UART_REGS->FCR, UART_FCR_FIFOEN, ENABLE);
CSL_FINST(CSL_UART_REGS->FCR, UART_FCR_RXCLR, CLR);
CSL_FINST(CSL_UART_REGS->FCR, UART_FCR_TXCLR, CLR);
CSL_UART_REGS->FCR = CSL_UART_FIFO_DMA1_DISABLE_TRIG08;
clk_div = CSL_UART_CLK_DIVIDER(115200);
/* Set DLL and DLM to values appropriate for the required baudrate */
value = ( (Uint32) (SystemClk) / (clk_div ) );
/* Write 1 to DLAB to access DLL and DLH*/
CSL_FINST(CSL_UART_REGS->LCR, UART_LCR_DLAB, DLABOFF);
if ( ( (Uint32)(SystemClk) % ( clk_div ) )
>= ( clk_div / 2 ) )
{
if ((value & 0xFF) != 0xFF)
{
CSL_UART_REGS->DLL = (Uint8)(value & 0xFF) + 1;
CSL_UART_REGS->DLH = (Uint8)((value & 0xFF00) >> 8);
}
else
{
CSL_UART_REGS->DLL = (Uint8) ( 0x00 );
CSL_UART_REGS->DLH = (Uint8) ( ( ( value & 0xFF00 ) >> 8 ) + 0x1u );
}
}
else
{
CSL_UART_REGS->DLL = (Uint8)(value & 0xFF) ;
CSL_UART_REGS->DLH = (Uint8)((value & 0xFF00) >> 8);
}
CSL_FINST(CSL_UART_REGS->LCR, UART_LCR_DLAB,DLABON);
/*setup word size*/
CSL_FINST(CSL_UART_REGS->LCR,UART_LCR_WLS,BITS8);
/* Stop bits generation */
CSL_FINS(CSL_UART_REGS->LCR,UART_LCR_STB,0); // /* 0 To generate 1 stop bit */
/* Parity selection */
CSL_FINST(CSL_UART_REGS->LCR,UART_LCR_PEN,DISABLE);
/* setup loopback control */
CSL_FINST(CSL_UART_REGS->MCR,UART_MCR_LOOP,DISABLE);
CSL_FINST(CSL_UART_REGS->MCR,UART_MCR_AFE,DISABLE);
CSL_FINST(CSL_UART_REGS->MCR,UART_MCR_RTS,CTSEN);
/* UART Receiver enabled */
CSL_FINST(CSL_UART_REGS->PWREMU_MGMT,UART_PWREMU_MGMT_URRST,ENABLE);
/* UART Transmitter enabled */
CSL_FINST(CSL_UART_REGS->PWREMU_MGMT,UART_PWREMU_MGMT_UTRST,ENABLE);
CSL_FINST(CSL_UART_REGS->PWREMU_MGMT,UART_PWREMU_MGMT_FREE,RUN);
}
//*****************************************************************************
It is noteworthy that the mentioned interrupt will be stoped after a short time working.
I request you kindly help me & give me a solution in order to solve this problem.
I would greatly appreciate your cooperation.
Look forward to receiving your favorite answer very soon.
Yours Truly,
A.Ghorbanian
