usart_sam_ba.h File Reference

USART functions for SAM-BA on SAM0.

Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.

Macros
#define	ACK   0x06
#define	CAN   0x18
#define	CRC16POLY   0x1021
#define	EOT   0x04
#define	ESC   0x1b
#define	NAK   0x15
#define	PKTLEN_128   128
#define	SHARP_CHARACTER   '#'
#define	SOH   0x01
#define	USART_BUFFER_SIZE   128
#define	USART_DEFAULT_TIMEOUT   1000

Functions
unsigned short	add_crc (char ptr, unsigned short crc)
	Gets data from usart line using Xmodem protocol. More...
uint8_t	getPacket (uint8_t *pData, uint8_t sno)
	Used by Xdown to retrieve packets. More...
void	usart_close (void)
	Stops the USART. More...
int	usart_getc (void)
	Waits and gets a value on usart line. More...
uint32_t	usart_getdata (void *data, uint32_t length)
	Gets data from usart line. More...
uint32_t	usart_getdata_xmd (void *data, uint32_t length)
	Gets data from usart line using Xmodem protocol. More...
bool	usart_is_rx_ready (void)
	This function checks if a character has been received on the usart line. More...
void	usart_open (void)
	Open the given USART. More...
int	usart_putc (int value)
	Puts a byte on usart line. More...
uint32_t	usart_putdata (void const *data, uint32_t length)
	Send buffer on usart line. More...
uint32_t	usart_putdata_xmd (void const *data, uint32_t length)
	Send buffer on usart line using Xmodem protocol. More...
int	usart_readc (void)
	Gets a value on usart line. More...
int	usart_sharp_received (void)
	Returns true if the SAM-BA Uart received the sharp char. More...

#define ACK   0x06

Referenced by getPacket(), usart_getdata_xmd(), and usart_putdata_xmd().

#define CAN   0x18

Referenced by getPacket(), usart_getdata_xmd(), and usart_putdata_xmd().

#define CRC16POLY   0x1021

Referenced by add_crc().

#define EOT   0x04

Referenced by usart_getdata_xmd(), and usart_putdata_xmd().

#define ESC   0x1b

Referenced by usart_getdata_xmd().

#define NAK   0x15

Referenced by usart_putdata_xmd().

#define PKTLEN_128   128

Referenced by getbytes(), getPacket(), putPacket(), usart_getdata_xmd(), and usart_putdata_xmd().

#define SHARP_CHARACTER   '#'

Referenced by usart_sharp_received().

#define SOH   0x01

Referenced by putPacket(), and usart_getdata_xmd().

#define USART_BUFFER_SIZE   128

Referenced by usart_readc().

#define USART_DEFAULT_TIMEOUT   1000

unsigned short add_crc	(	char	ptr,
		unsigned short	crc
	)

Gets data from usart line using Xmodem protocol.

Parameters

data	pointer
number	of data to get

Returns

value read on usart line

Gets data from usart line using Xmodem protocol.

References CRC16POLY.

Referenced by getbytes(), and putPacket().

uint8_t getPacket	(	uint8_t *	pData,
		uint8_t	sno
	)

Used by Xdown to retrieve packets.

References ACK, CAN, error_timeout, getbytes(), PKTLEN_128, usart_getc(), and usart_putc().

Referenced by usart_getdata_xmd().

void usart_close

(

void

)

Stops the USART.

Stops the USART.

References usart_disable(), usart_disable_transceiver(), usart_sam_ba, USART_TRANSCEIVER_RX, and USART_TRANSCEIVER_TX.

int usart_getc

(

void

)

Waits and gets a value on usart line.

Returns

value read on usart line

References usart_is_rx_ready(), usart_read_wait(), and usart_sam_ba.

Referenced by getbytes(), getPacket(), putPacket(), usart_getdata(), usart_getdata_xmd(), usart_putdata_xmd(), and usart_sharp_received().

uint32_t usart_getdata	(	void *	data,
		uint32_t	length
	)

Gets data from usart line.

Parameters

data	pointer
number	of data to get

Returns

value read on usart line

Gets data from usart line.

References usart_getc().

uint32_t usart_getdata_xmd	(	void *	data,
		uint32_t	length
	)

Gets data from usart line using Xmodem protocol.

Parameters

data	pointer
number	of data to get

Returns

value read on usart line

Gets data from usart line using Xmodem protocol.

References ACK, CAN, EOT, error_timeout, ESC, getPacket(), length, mode_of_transfer, PKTLEN_128, ptr_data, size_of_data, SOH, system_clock_source_get_hz(), usart_getc(), usart_is_rx_ready(), and usart_putc().

bool usart_is_rx_ready

(

void

)

This function checks if a character has been received on the usart line.

Returns

1 if a byte is ready to be read.

Referenced by usart_getc(), usart_getdata_xmd(), and usart_sharp_received().

void usart_open

(

void

)

Open the given USART.

References b_sharp_received, usart_config::baudrate, error_timeout, usart_config::generator_source, idx_rx_read, idx_rx_write, idx_tx_read, idx_tx_write, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, STATUS_OK, usart_enable(), usart_enable_transceiver(), usart_get_config_defaults(), usart_init(), usart_sam_ba, USART_TRANSCEIVER_RX, and USART_TRANSCEIVER_TX.

Referenced by main().

int usart_putc

(

int

value

)

Puts a byte on usart line.

Parameters

value

Value to put

Returns

1 if function was successfully done, otherwise 0.

Puts a byte on usart line.

Parameters

value

Value to put

Returns

1 if function was successfully done, otherwise 0.

References usart_sam_ba, and usart_write_wait().

Referenced by getPacket(), putPacket(), usart_getdata_xmd(), usart_putdata(), and usart_putdata_xmd().

uint32_t usart_putdata	(	void const *	data,
		uint32_t	length
	)

Send buffer on usart line.

Parameters

data	pointer
number	of data to send

Returns

number of data sent

Send buffer on usart line.

References i, length, and usart_putc().

uint32_t usart_putdata_xmd	(	void const *	data,
		uint32_t	length
	)

Send buffer on usart line using Xmodem protocol.

Parameters

data	pointer
number	of data to send

Returns

number of data sent

Send buffer on usart line using Xmodem protocol.

References ACK, CAN, EOT, error_timeout, length, mode_of_transfer, NAK, PKTLEN_128, ptr_data, putPacket(), size_of_data, usart_getc(), and usart_putc().

int usart_readc

(

void

)

Gets a value on usart line.

Returns

value read on usart line

References buffer_rx_usart, idx_rx_read, and USART_BUFFER_SIZE.

int usart_sharp_received

(

void

)

Returns true if the SAM-BA Uart received the sharp char.

Returns

Returns true if the SAM-BA Uart received the sharp char

References SHARP_CHARACTER, usart_getc(), and usart_is_rx_ready().

Referenced by main().