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Diffstat (limited to 'src/kernel/arch/i386/tty/serial.c')
| -rw-r--r-- | src/kernel/arch/i386/tty/serial.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/kernel/arch/i386/tty/serial.c b/src/kernel/arch/i386/tty/serial.c index f9bb252..e77ff5c 100644 --- a/src/kernel/arch/i386/tty/serial.c +++ b/src/kernel/arch/i386/tty/serial.c @@ -35,9 +35,11 @@ static void serial_putchar(char c) { port_out8(COM1, c); } -char serial_read(void) { - while ((port_in8(COM1 + 5) & 0x01) == 0); // wait for DR - return port_in8(COM1); +bool serial_poll_read(char *c) { + if ((port_in8(COM1 + 5) & 0x01) == 0) // needs DR + return false; + *c = port_in8(COM1); + return true; } void serial_write(const char *buf, size_t len) { |