sio2host.c File Reference

Event handling Serial I/O Functionalities.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include "conf_sio2host.h"
#include "sio2host.h"
#include "board.h"
#include "stdio.h"

Macros
#define	USB_CTRL_RD_HI()
#define	USB_CTRL_RD_LO()
#define	USB_CTRL_WR_HI()
#define	USB_CTRL_WR_LO()
#define	USB_DATA_SETINP()
#define	USB_DATA_SETOUTP()

Typedefs
typedef enum pin_state_tag	pin_state_t

Enumerations
enum	pin_state_tag {   LOW,   HIGH,   LOW,   HIGH }

Functions
int	_read (int *f)
int	_write (char c, int *f)
uint8_t	sio2host_getchar (void)
	This function performs a blocking character receive functionality. More...
int	sio2host_getchar_nowait (void)
	This function performs a non-blocking character receive functionality. More...
void	sio2host_init (void)
	Initializes the Serial IO Module of the Host Device. More...
uint8_t	sio2host_rx (uint8_t *data, uint8_t max_length)
	Receives data from USB. More...
uint8_t	sio2host_tx (uint8_t *data, uint8_t length)
	Transmits data via USB. More...
static void	usb_getc (void)
	Gets a byte from USB FIFO. More...
void	usb_handler (void)
	Services data transmission or reception on USB. More...
static void	usb_putc (void)
	Puts a character onto USB FIFO. More...

Variables
uint8_t	usb_rx_buf [USB_RX_BUF_SIZE]
	USB receive buffer. More...
static uint8_t	usb_rx_buf_head
	Receive buffer head. More...
static uint8_t	usb_rx_buf_tail
	Receive buffer tail. More...
static uint8_t	usb_rx_count
	Number of bytes in receive buffer. More...
uint8_t	usb_tx_buf [USB_TX_BUF_SIZE]
	USB transmit buffer. More...
static uint8_t	usb_tx_buf_head
	Transmit buffer head. More...
static uint8_t	usb_tx_buf_tail
	Transmit buffer tail. More...
static bool	usb_tx_busy = false
	USB Tx busy flag: This is required in order to detect a Tx busy condition if the terminal program is not running, so that the FTDI chip cannot deliver its data. More...
static uint8_t	usb_tx_count
	Number of bytes in transmit buffer. More...

#define USB_CTRL_RD_HI

(

)

Value:

do { USB_CTRL_PORT |= USB_RD; } \
    while (0)

Referenced by sio2host_init(), and usb_getc().

#define USB_CTRL_RD_LO

(

)

Value:

do { USB_CTRL_PORT &= ~USB_RD; } \
    while (0)

Referenced by sio2host_init(), and usb_getc().

#define USB_CTRL_WR_HI

(

)

Value:

do { USB_CTRL_PORT |= USB_WR; } \
    while (0)

Referenced by usb_putc().

#define USB_CTRL_WR_LO

(

)

Value:

do { USB_CTRL_PORT &= ~USB_WR; } \
    while (0)

Referenced by usb_putc().

#define USB_DATA_SETINP

(

)

Value:

do { USB_DATA_DDR = 0x00; USB_DATA_PORT = 0x00; } \
    while (0)

Referenced by sio2host_init(), usb_getc(), and usb_putc().

#define USB_DATA_SETOUTP

(

)

Value:

do { USB_DATA_DDR = 0xFF; } \
    while (0)

Referenced by sio2host_init(), and usb_putc().

typedef enum pin_state_tag pin_state_t

enum pin_state_tag

Enumerator
LOW	Pin state low.
HIGH	Pin state high.
LOW	Pin state low.
HIGH	Pin state high.

int _read

(

int *

f

)

Referenced by sio2host_init().

int _write	(	char	c,
		int *	f
	)

Referenced by sio2host_init().

static void usb_getc ( void  )

static

Gets a byte from USB FIFO.

This function receives a byte from usb.

References nop, USB_CTRL_RD_HI, USB_CTRL_RD_LO, USB_DATA_PIN, USB_DATA_SETINP, usb_rx_buf, USB_RX_BUF_SIZE, usb_rx_buf_tail, and usb_rx_count.

Referenced by usb_handler().

static void usb_putc ( void  )

static

Puts a character onto USB FIFO.

This function transmits a byte over usb.

References USB_CTRL_WR_HI, USB_CTRL_WR_LO, USB_DATA_PORT, USB_DATA_SETINP, USB_DATA_SETOUTP, usb_tx_buf, usb_tx_buf_head, USB_TX_BUF_SIZE, and usb_tx_count.

Referenced by usb_handler().

uint8_t usb_rx_buf[USB_RX_BUF_SIZE]

USB receive buffer.

Referenced by sio2host_rx(), and usb_getc().

uint8_t usb_rx_buf_head

static

Receive buffer head.

Referenced by sio2host_rx().

uint8_t usb_rx_buf_tail

static

Receive buffer tail.

Referenced by sio2host_rx(), and usb_getc().

uint8_t usb_rx_count

static

Number of bytes in receive buffer.

Referenced by sio2host_rx(), and usb_getc().

uint8_t usb_tx_buf[USB_TX_BUF_SIZE]

USB transmit buffer.

Referenced by sio2host_tx(), and usb_putc().

uint8_t usb_tx_buf_head

static

Transmit buffer head.

Referenced by sio2host_tx(), and usb_putc().

uint8_t usb_tx_buf_tail

static

Transmit buffer tail.

Referenced by sio2host_tx().

bool usb_tx_busy = false

static

USB Tx busy flag: This is required in order to detect a Tx busy condition if the terminal program is not running, so that the FTDI chip cannot deliver its data.

Referenced by sio2host_tx(), and usb_handler().

uint8_t usb_tx_count

static

Number of bytes in transmit buffer.

Referenced by sio2host_tx(), usb_handler(), and usb_putc().