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32 lines
945 B
32 lines
945 B
5 years ago
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#include "serial.h"
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/** serial_configure_line:
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* Configures the line of the given serial port. The port is set to have a
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* data length of 8 bits, no parity bits, one stop bit and break control
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* disabled.
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*
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* @param com The serial port to configure
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*/
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void serial_configure_line(unsigned short com)
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{
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/* Bit: | 7 | 6 | 5 4 3 | 2 | 1 0 |
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* Content: | d | b | prty | s | dl |
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* Value: | 0 | 0 | 0 0 0 | 0 | 1 1 | = 0x03
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*/
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outb(SERIAL_LINE_COMMAND_PORT(com), 0x03);
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}
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void serial_configure_baud_rate(unsigned short com, unsigned short divisor)
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{
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outb(SERIAL_LINE_COMMAND_PORT(com),
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SERIAL_LINE_ENABLE_DLAB);
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outb(SERIAL_DATA_PORT(com),
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(divisor >> 8) & 0x00FF);
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outb(SERIAL_DATA_PORT(com),
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divisor & 0x00FF);
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}
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int serial_is_transmit_fifo_empty(unsigned int com)
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{
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/* 0x20 = 0010 0000 */
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return inb(SERIAL_LINE_STATUS_PORT(com)) & 0x20;
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}
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