diff options
| author | dzwdz | 2022-03-26 21:06:07 +0100 |
|---|---|---|
| committer | dzwdz | 2022-03-26 21:06:07 +0100 |
| commit | 38d1712e31e60de9f2afe85873b2174e002e3e99 (patch) | |
| tree | 19c402747631d6df2dbd7c9222d7871b941e94ee /src/kernel/arch/i386/tty/serial.c | |
| parent | 96f021e783f1e99a1ce7d34c0dfeaef524abc2d1 (diff) | |
kernel: IRQs; PS/2 keyboard support
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) { |