My Documents/icctest/ASIO_BETA/asio.c File Reference

#include "asio.h"

Functions
int	show_val (int val, int mask, int pinmap, int syncmap)
void	asio_init (void)
void	asio_tx (char val)
void	asio_txString (char *str)
int	asio_rx (void)
int	asio_rxString (char *str, int len)

---

Detailed Description

• defines implementation for an asynchronous serial IO driver for Propeller C bringup. This module can be used with 5MHz or 10MHz crystal. See header file for more details.

---

Function Documentation

void asio_init

(

void

)

Init direction bits. Would init baud here, but using const vs var has different timing.

int asio_rx

(

void

)

Get a byte from the serial interface. param are set by # define constants in asio.h

Returns:

int representing byte received.

int asio_rxString	(	char *	str,
		int	len
	)

Prefer using a buffer head/tail strategy provided by starting a COG. For now use asio_rx byte by byte blocking calls. Use calls to asio_rx until a terminator like "\r" is found. All strings returned are null terminated.

Parameters:

	str	is a predefined input buffer of len.
	len	is maximum number of chars to receive in buffer.

Returns:

number of bytes received.

void asio_tx

(

char

val

)

Transmit a char on interface.

Parameters:

val

is byte to send

void asio_txString

(

char *

str

)

Transmit a string on interface.

Parameters:

str

is string to send.

int show_val	(	int	val,
		int	mask,
		int	pinmap,
		int	syncmap
	)

Show bits on oscilloscope. This is for debug only ... bits come out LSB first

Parameters:

	val	is value to show
	mask	is the byte/word/long mask
	pinmap	is the pin bit map for bit stream output
	syncmap	is the bit map for bit stream oscope sync

Returns:

non-zero for looping;

---