40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
|
#include <kernel/chroma.h>
|
||
|
|
|
||
|
|
#define SERIAL_DATA(base) (base)
|
||
|
|
#define SERIAL_DLAB(base) (base + 1)
|
||
|
|
#define SERIAL_FIFO(base) (base + 2)
|
||
|
|
#define SERIAL_LINE(base) (base + 3)
|
||
|
|
#define SERIAL_MODEM(base) (base + 4)
|
||
|
|
#define SERIAL_LINE_STATUS(base) (base + 5)
|
||
|
|
#define COM1 0x3F8
|
||
|
|
|
||
|
|
void InitSerial() {
|
||
|
|
// Disable interrupts
|
||
|
|
WritePort(SERIAL_DLAB(COM1), 0x00, 1);
|
||
|
|
// Set baud rate to /3 (115200 bits/sec)
|
||
|
|
WritePort(SERIAL_LINE(COM1), 0x80, 1);
|
||
|
|
WritePort(SERIAL_DATA(COM1), 0x03, 1);
|
||
|
|
WritePort(SERIAL_DLAB(COM1), 0x00, 1);
|
||
|
|
// Set serial to 8 bits, no parity and one stop bit.
|
||
|
|
WritePort(SERIAL_LINE(COM1), 0x03, 1);
|
||
|
|
// Enable FIFO and clear all buffers
|
||
|
|
WritePort(SERIAL_FIFO(COM1), 0xC7, 1);
|
||
|
|
// Enable IRQs, set RTS and DSR
|
||
|
|
WritePort(SERIAL_MODEM(COM1), 0x03, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int CheckSerial() {
|
||
|
|
return ReadPort(SERIAL_LINE_STATUS(COM1), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WriteSerialChar(const char chr) {
|
||
|
|
while(!(CheckSerial() & 0x20));
|
||
|
|
WritePort(COM1, chr, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WriteSerialString(const char* str, size_t len) {
|
||
|
|
for(size_t i = 0; i < len; i++) {
|
||
|
|
WriteSerialChar(str[i]);
|
||
|
|
}
|
||
|
|
}
|