Esempio n. 1
0
unsigned serialcon_readln(char *line, unsigned len)
{
    char c;
    unsigned pos;

    /*
     * Due to how the circular buffer is implemented, its contents has a maximum
     * of SERIAL_BUFFER_SIZE - 1.  This gives us room to put a terminating NUL
     * at the end of `line' so that it can be processed as a string.
     */
    if (len < SERIAL_BUFFER_SIZE)
        panic(PANIC_RUNTIME_ERROR);

    if (rbuf_is_empty(&serialcon_rxbuf))
        panic(PANIC_LOGIC_ERROR);  // shouldn't have `serialcon_has_input' set with no data to read!

    pos = 0;
    while (!rbuf_is_empty(&serialcon_rxbuf)) {
        rbuf_read(&serialcon_rxbuf, &c);
        // don't copy control characters - http://www.ascii-code.com/
        if (isprint(c)) {
            line[pos] = c;
            pos++;
        }
    }
    line[pos] = '\0';
    serialcon_has_input = false;
    return pos;  // doesn't include \0 to be like strlen() return value
}
Esempio n. 2
0
enum cc_stat rbuf_dequeue(Rbuf *rbuf, uint64_t *out)
{
    if (rbuf_is_empty(rbuf))
       return CC_ERR_OUT_OF_RANGE;
    *out = rbuf->buf[rbuf->tail];
    rbuf->tail = (rbuf->tail + 1) % rbuf->capacity;
    --rbuf->size;
    return CC_OK;
}
Esempio n. 3
0
void serialcon_flush()
{
    if (!rbuf_is_empty(&serialcon_txbuf))
        IE2 |= UCA0TXIE;  // the interrupt USCIAB0TX_ISR() does the actual work in the background
}