void serial_set_up()
{
serial_configure_baud_rate(SERIAL_COM1_BASE, 1);
serial_configure_line(SERIAL_COM1_BASE);
serial_configure_buffers(SERIAL_COM1_BASE);
serial_configure_modem(SERIAL_COM1_BASE);
}
/* serial_initialize:
* Sets up the serial port
* base: the serial port to initialize
*/
void serial_initialize(unsigned int base){
//Set Serial baud rate divisor to 3 (38400 baud)
outb(base + 1, 0x00); // Disable all interrupts
serial_configure_baud_rate(base, 3);
serial_configure_line(base);
serial_configure_buffers(base);
serial_configure_modem(base);
}
int serial_write(char *buf, unsigned short com) {
serial_configure_baud_rate(com, 2);
serial_configure_line(com);
while(*buf != 0) {
if((serial_is_transmit_fifo_empty(com) & 0x20) == 0x00)
continue;
outb(SERIAL_DATA_PORT(com), *buf);
buf++;
}
return currPos;
}
void serial_init()
{
#if 0
outb(SERIAL_COM1 + 1, 0x00); // Disable all interrupts
outb(SERIAL_COM1 + 3, 0x80); // Enable DLAB (set baud rate divisor)
outb(SERIAL_COM1 + 0, 0x01); // Set divisor to 3 (lo byte) 38400 baud
outb(SERIAL_COM1 + 1, 0x00); // (hi byte)
outb(SERIAL_COM1 + 3, 0x03); // 8 bits, no parity, one stop bit
outb(SERIAL_COM1 + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
outb(SERIAL_COM1 + 4, 0x0B); // IRQs enabled, RTS/DSR set
#else
/*Set baud rate to be 115200*/
serial_configure_baud_rate(SERIAL_COM1, 1);
/* 8 bits, no parity, one stop bit, no break control */
serial_configure_line(SERIAL_COM1, SERIAL_8N1);
serial_configure_fifo(SERIAL_COM1, SERIAL_FIFO_14);
serial_configure_modem(SERIAL_COM1, SERIAL_RTS_DTR);
#endif
}
