One-Wire UART Driver

Collaboration diagram for One-Wire UART Driver:

Data Structures
struct	_NUTOWIINFO_UART
	OWI runtime control block container. More...
Defines
#define	OWI_UART_WRITE_RST   0xf0
	Data to send on the UART for the OWI primitives.
#define	OWI_UART_WRITE_ONE   0xff
	UART data for write '1' and read.
#define	OWI_UART_WRITE_ZERO   0x00
	UART data for write '0'.
#define	OWI_UART_READ_ONE   0x01
	Data to expect from the UART for the OWI primitives.
#define	OWI_UART_BAUD_RESET   9600
	Baud rates to use for OWI primitives.
#define	OWI_UART_BAUD_RWBIT   115200
	UART baudrate for RW bit.
Typedefs
typedef struct _NUTOWIINFO_UART	NUTOWIINFO_UART
Functions
int	NutRegisterOwiBus_Uart (NUTOWIBUS *bus, NUTDEVICE *uart, int pullup_port, uint_fast8_t pullup_pin)
	Register the One-Wire bus.

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Define Documentation

#define OWI_UART_WRITE_RST   0xf0

Data to send on the UART for the OWI primitives.

UART data for presence impulse.

#define OWI_UART_WRITE_ONE   0xff

UART data for write '1' and read.

#define OWI_UART_WRITE_ZERO   0x00

UART data for write '0'.

#define OWI_UART_READ_ONE   0x01

Data to expect from the UART for the OWI primitives.

UART data received for read '1'.

#define OWI_UART_BAUD_RESET   9600

Baud rates to use for OWI primitives.

UART baudrate for presence impulse.

#define OWI_UART_BAUD_RWBIT   115200

UART baudrate for RW bit.

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Typedef Documentation

typedef struct _NUTOWIINFO_UART NUTOWIINFO_UART

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Function Documentation

int NutRegisterOwiBus_Uart	(	NUTOWIBUS *	bus,
		NUTDEVICE *	uart,
		int	pullup_port,
		uint_fast8_t	pullup_pin
	)

Register the One-Wire bus.

Parameters:

bus	The returned NUTOWIBUS.
uart	The UART device to use.
pullup_port	If given, port to control strong pull-up for parasitic powered devices.
pullup_pin	The pin to control strong pull-up for parasitic powered devices.

Returns:

OWI_SUCCESS on success, a negative value otherwise.

References _ioctl(), _O_BINARY, _O_RDWR, _open(), calloc, _NUTDEVICE::dev_name, _NUTOWIBUS::mode, NULL, NutRegisterDevice(), OWI_INVALID_HW, OWI_OUT_OF_MEM, OWI_SUCCESS, _NUTOWIBUS::owibus_info, _NUTOWIBUS::OwiReadBlock, _NUTOWIBUS::OwiTouchReset, _NUTOWIBUS::OwiWriteBlock, _NUTOWIINFO_UART::uart_fd, UART_SETREADTIMEOUT, and UART_SETSTOPBITS.

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