Sending data (debug printing) to serial port

2017-12-01 22:50:51 +01:00
parent d05ddfeab4
commit 034a870ac7
6 changed files with 58 additions and 4 deletions
--- a/src/kernel/drivers/serial.c
+++ b/src/kernel/drivers/serial.c
@@ -0,0 +1,19 @@
+#include <serial.h>
+#include <ports.h>
+
+void serial_init(uint16_t port)
+{
+  outb(port + 1, 0x00);
+  outb(port + 3, 0x80);
+  outb(port + 0, 0x03);
+  outb(port + 1, 0x00);
+  outb(port + 3, 0x03);
+  outb(port + 2, 0xC7);
+  outb(port + 4, 0x0B);
+}
+
+void serial_write(uint16_t port, uint8_t c)
+{
+  while(!(inb(port + 5)&0x20));
+  outb(port, c);
+}