/**
* Transmit a string, followed by a newline, over UART.
*
* \param str String to transmit.
*/
void serial_writeln(uint8_t *str)
{
int i;
for (i = 0; i < strlen(str); i++) {
serial_writebyte(str[i]);
}
serial_writebyte('\n');
}
void serial_write(const char *s)
{
if (!serial_initialized) {
serial_init();
}
char ch;
while ((ch = *s++)) {
serial_writebyte(ch);
}
}
/* serial_writebyte
Write a byte out out to the serial port
=> c = character to output
*/
void serial_writebyte(unsigned char c)
{
/* loop waiting for bit 5 of the line status register to set, indicating
data can be written */
while((x86_inportb(SERIAL_HW + 5) & 0x20) == 0) __asm__ __volatile("pause");
x86_outportb(SERIAL_HW + 0, c);
/* in case whatever's connected to the serial port expects CRLF */
#ifdef DEBUG_ENDING_CRLF
if(c == '\n') serial_writebyte('\r');
#endif
}
