RE: [microblaze-uclinux] serial comunication in petalinux

["Brettschneider Falk" <fbrettschneider@xxxxxxxxxxxxxxx>]

Jim Law wrote:
> I had worked thru some Linux docs and been using termios and 
> signal methods 
> to access serial ports, but your posting looks like a 
> smoother path.  So I 
> thought I'd play with what you describe, but the 
> "serial_channel_xuartlite.h" file seems to not be around to 
> include.  Is 
> there a option in menuconfig that needs to be turned on too?
> 
> Thanks,
> Jim

Sorry, it was code I once found anywhere in the net. Here we go:


typedef struct _SerialPort_XUartLite {
    bool portOpen;
} SerialPort_XUartLite;

#define NUM_XUARTLITE   1
SerialPort_XUartLite s_xuartLite[NUM_XUARTLITE];

/*----------------------------------------------------------------------------*/
int io_serial_xuartlite_openPort(unsigned char portNo)
{
    if (portNo >= NUM_XUARTLITE) {
        return 0;
    }
    s_xuartLite[portNo].portOpen = true;
    return 1;
}

/*----------------------------------------------------------------------------*/
void io_serial_xuartlite_closePort(unsigned char portNo)
{
    s_xuartLite[portNo].portOpen = false;
}

/*----------------------------------------------------------------------------*/
int io_serial_xuartlite_readBlock(unsigned char portNo, char *data, int maxlen)
{
    int recvBytes = 0;
    if (s_xuartLite[portNo].portOpen) {
        while (recvBytes < maxlen) {
            if (XUartLite_mIsReceiveEmpty(STDIN_BASEADDRESS)) {
                return recvBytes;
            }
            *data = (Xuint8)XIo_In32(STDIN_BASEADDRESS + XUL_RX_FIFO_OFFSET);
            data++;
            recvBytes++;
        }
    }
    return recvBytes;
}

/*----------------------------------------------------------------------------*/
int io_serial_xuartlite_writeBlock(unsigned char portNo, const char *data, int len)
{
    int retVal = 0;
    if (s_xuartLite[portNo].portOpen) {
        int i;
        char* p = (char*)data;
        for (i = 0; i < len; i++) {
            while (XUartLite_mIsTransmitFull(STDOUT_BASEADDRESS));
            XIo_Out32(STDOUT_BASEADDRESS + XUL_TX_FIFO_OFFSET, *p);
            p++;
        }
        retVal = len;
    }
    return retVal;
}

/*----------------------------------------------------------------------------*/
bool io_serial_xuartlite_byteAvailable(unsigned char portNo)
{
    if (s_xuartLite[portNo].portOpen) {
        return XUartLite_mIsReceiveEmpty(STDIN_BASEADDRESS) ? false : true;
    }
    return false;
}

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