Serial Support Functions (not for user code)

Functions
int	uart_send_general_buffered (char c, FILE *fp)
int	uart_recv_general_buffered (FILE *fp)
void	serial_receive_isr (struct OU_FILE_BUF *ou_fp)
void	serial_transmit_isr (struct OU_FILE_BUF *ou_fp)

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Function Documentation

void serial_receive_isr

(

struct OU_FILE_BUF *

ou_fp

)

Interrupt service routine body for receiving a byte on a serial port. This function should never be called by user code.

Bytes not fitting in the buffer are dropped on the floor

Parameters:

ou_fp

A valid OU File structure for the input port

Author:

Andrew H. Fagg

References OU_FILE_BUF::buf_in_back, OU_FILE_BUF::buf_in_front, OU_FILE_BUF::buf_size_in, OU_FILE_BUF::buffer, and OU_FILE_BUF::port.

void serial_transmit_isr

(

struct OU_FILE_BUF *

ou_fp

)

Interrupt service routine body for sending a byte to a serial port. This function should never be called by user code.

Parameters:

ou_fp

A valid OU File structure for the output port

Author:

Andrew H. Fagg

References OU_FILE_BUF::buf_out_back, OU_FILE_BUF::buf_out_front, OU_FILE_BUF::buf_size_in, OU_FILE_BUF::buf_size_out, OU_FILE_BUF::buffer, OU_FILE_BUF::port, serial0_transmit_disable(), serial1_transmit_disable(), serial2_transmit_disable(), and serial3_transmit_disable().

int uart_recv_general_buffered

(

FILE *

fp

)

LibC interface function for receiving a character from the input buffer. This function should never be called by user code.

Parameters:

fp

A valid file pointer for the desired output port

Returns:

The next character in the buffer.

Author:

Andrew H. Fagg

References OU_FILE_BUF::buf_in_back, OU_FILE_BUF::buf_in_front, OU_FILE_BUF::buf_size_in, and OU_FILE_BUF::buffer.

Referenced by serial_init_buffered().

int uart_send_general_buffered	(	char	c,
		FILE *	fp
	)

LibC interface function for sending a character to the output buffer. This function should never be called by user code.

Parameters:

	c	Character to send
	fp	A valid file pointer for the desired output port

Returns:

0 if no errors

Author:

Andrew H. Fagg

References OU_FILE_BUF::buf_out_back, OU_FILE_BUF::buf_out_front, OU_FILE_BUF::buf_size_in, OU_FILE_BUF::buf_size_out, OU_FILE_BUF::buffer, OU_FILE_BUF::port, serial0_transmit_enable(), serial1_transmit_enable(), serial2_transmit_enable(), and serial3_transmit_enable().

Referenced by serial_init_buffered().