int up_putc(int ch)
{
uint8_t state;
/* Keep interrupts disabled so that we do not interfere with normal
* driver operation
*/
state = z8_disableuartirq(&CONSOLE_DEV);
/* Check for LF */
if (ch == '\n')
{
/* Add CR before LF */
z8_consoleput('\r');
}
/* Output the character */
z8_consoleput((uint8_t)ch);
/* It is important to restore the TX interrupt while the send is pending.
* otherwise, TRDE interrupts can be lost since they do not pend after the
* TRDE false->true transition.
*/
z8_restoreuartirq(&CONSOLE_DEV, state);
return ch;
}
void up_serialinit(void)
{
/* Disable all UART interrupts */
(void)z8_disableuartirq(&TTYS0_DEV);
(void)z8_disableuartirq(&TTYS1_DEV);
/* Initialize the console for early use */
CONSOLE_DEV.isconsole = true;
z8_setup(&CONSOLE_DEV);
/* Reigster console and tty devices */
(void)uart_register("/dev/console", &CONSOLE_DEV);
(void)uart_register("/dev/ttyS0", &TTYS0_DEV);
(void)uart_register("/dev/ttyS1", &TTYS1_DEV);
}
static void z8_shutdown(FAR struct uart_dev_s *dev)
{
struct z8_uart_s *priv = (struct z8_uart_s*)dev->priv;
(void)z8_disableuartirq(dev);
}
static void z8_shutdown(FAR struct uart_dev_s *dev)
{
(void)z8_disableuartirq(dev);
}