63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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#ifndef __SERIAL_H
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#define __SERIAL_H
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#define SERIAL_COM1_BASE 0x3F8 // com1 base port
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extern void init_serial();
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/** serial_configure_baud_rate:
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* Sets the speed of the data being sent. The default speed of a serial
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* port is 115200 bits/s. The argument is a divisor of that number, hence
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* the resulting speed becomes (115200 / divisor) bits/s.
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*
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* @param com The COM port to configure
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* @param divisor The divisor
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*/
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extern void serial_configure_baud_rate(unsigned short com, unsigned short divisor);
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// configures line of a serial port
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extern void serial_configure_line(unsigned short com);
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// Bit: | 7 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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// Content: | lvl | bs | r | dma | clt | clr | e |
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// 0xc7
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/*
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*Enables FIFO
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*Clear both receiver and transmission FIFO queues
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*Use 14 bytes as size of queue
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*/
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extern void serial_configure_buffers(unsigned short com);
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// write data into the serial port
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extern void serial_write(unsigned short com, char data);
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// configure the modem of our serial port
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// Bit: | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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// Content: | r | r | af | lb | ao2 | ao1 | rts | dtr |
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extern void serial_configure_modem(unsigned short com);
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/** serial_is_transmit_fifo_empty:
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* Checks whether the transmit FIFO queue is empty or not for the given COM
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* port.
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*
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* @param com The COM port
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* @return 0 if the transmit FIFO queue is not empty
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* 1 if the transmit FIFO queue is empty
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*/
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extern int serial_is_trasmit_fifo_empty(unsigned short com);
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extern void serial_print(char *string); // print out over a serial port
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// printf style func for serial port
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void serial_printf(char *format, ...);
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#endif
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