diff options
Diffstat (limited to 'kernel/src/devices/serial.c')
| -rw-r--r-- | kernel/src/devices/serial.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/kernel/src/devices/serial.c b/kernel/src/devices/serial.c index 76bc71a..2d2da51 100644 --- a/kernel/src/devices/serial.c +++ b/kernel/src/devices/serial.c @@ -3,13 +3,13 @@ void init_serial() { - outb(PORT + 1, 0x00); // Disable all interrupts - outb(PORT + 3, 0x80); // Enable DLAB (set baud rate divisor) - outb(PORT + 0, 0x03); // Set divisor to 3 (lo byte) 38400 baud - outb(PORT + 1, 0x00); // (hi byte) - outb(PORT + 3, 0x03); // 8 bits, no parity, one stop bit - outb(PORT + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold - outb(PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set + outb(PORT + 1, 0x00); // Disable all interrupts + outb(PORT + 3, 0x80); // Enable DLAB (set baud rate divisor) + outb(PORT + 0, 0x03); // Set divisor to 3 (lo byte) 38400 baud + outb(PORT + 1, 0x00); // (hi byte) + outb(PORT + 3, 0x03); // 8 bits, no parity, one stop bit + outb(PORT + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold + outb(PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set } uint8_t serial_received() @@ -19,7 +19,8 @@ uint8_t serial_received() char read_serial() { - while (serial_received() == 0); + while (serial_received() == 0) + ; return (char)inb(PORT); } @@ -31,7 +32,8 @@ uint8_t is_transmit_empty() void write_serial(char c) { - while (is_transmit_empty() == 0); + while (is_transmit_empty() == 0) + ; outb(PORT, (uint8_t)c); } |