static int uart_getc(uint32_t uart_base)
{
uint16_t uart_rbr_val;
/* wait for data ! */
while (!uart_tstc(uart_base))
continue;
/* grab the new byte */
uart_rbr_val = bfin_read(&pUART->rbr);
#ifdef CONFIG_DEBUG_SERIAL
/* grab & clear the LSR */
uart_lsr_t uart_lsr_val = uart_lsr_read(uart_base);
cached_lsr[cache_count] = uart_lsr_val;
cached_rbr[cache_count] = uart_rbr_val;
cache_count = (cache_count + 1) % ARRAY_SIZE(cached_lsr);
if (uart_lsr_val & (OE|PE|FE|BI)) {
printf("\n[SERIAL ERROR]\n");
do {
--cache_count;
printf("\t%3zu: RBR=0x%02x LSR=0x%02x\n", cache_count,
cached_rbr[cache_count], cached_lsr[cache_count]);
} while (cache_count > 0);
return -1;
}
#endif
uart_lsr_clear(uart_base);
return uart_rbr_val;
}
/*==============================================================================
* - serial_read()
*
* - try to receive <max> char from FIFO
*/
int serial_read (char *buf, int max)
{
int nbyte = 0;
if (serial_tstc() == 0)
uart_pend (WAIT_FOREVER);
SERIAL_FIFO_LOCK();
while ((uart_tstc() != 0) && (max-- != 0)) {
*buf++ = uart_getc();
nbyte++;
}
SERIAL_FIFO_UNLOCK();
return nbyte;
}
int lldebug_tstc(void)
{
return uart_tstc();
}
/*==============================================================================
* - serial_tstc()
*
* - check whether have received char in FIFO
*/
int serial_tstc(void)
{
return uart_tstc ();
}
