uart.h File Reference

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Macros
#define	HOST_BAUD   9600
#define	HOST_UBRR   (F_CPU/16/HOST_BAUD-1)
#define	SENSOR_BAUD   9600
#define	SENSOR_UBRR   (F_CPU/16/SENSOR_BAUD-1)
#define	UART0_BUFSIZE   40
	Size of the UART0 Buffers. More...
#define	UART0_DE_MASK   0x04
#define	UART0_PORT   PORTE
#define	UART1_BUFSIZE   200
	UART1 really communicates, so a little more. More...
#define	UART1_CTS_MASK   0x20
#define	UART1_DE_MASK   0x02
#define	UART1_PIN   PIND
#define	UART1_PORT   PORTD
#define	UART1_RTS_MASK   0x10
#define	USE_RTS

Functions
static void	AssertRTS (void)
	Asserts RTS to the Host Line, i.e. allows the Host to send Data. More...
int	hprintf_P (const char *fmt,...)
	printf_P for Communication with the Host More...
void	InitUart (void)
	Initialize USART Hardware and Pointers. More...
void	putc0 (char)
	Sends a Command Char (bit9=1) over USART0. More...
int	putchar_uart1 (char, FILE *)
	The Putchar-Routine for USART1 (Host-Interface) More...
void	putd0 (char)
	Sends a Data Char (bit9=0) over USART0. More...
static void	ReleaseRTS (void)
	Releases RTS to the Host Line, i.e. stops the Host from sending Data. More...
bool	Tbub1IsEmpty (void)
	Tell if Transmit Buffer 1 is empty. More...
static void	Uart0DisableLineDriver (void)
	Disables the RS485 Line Driver on Uart0. More...
static void	Uart0EnableLineDriver (void)
	Enables the RS485 Line Driver on Uart0. More...
static void	Uart1DisableLineDriver (void)
	Disables the RS485 Line Driver on Uart1. More...
static void	Uart1EnableLineDriver (void)
	Enables the RS485 Line Driver on Uart1. More...
void	usart1FlushRx (void)
static void	UsartTimerCallback (void)
	Timer Callback. Checks for CTS from the Host to resume Communication. More...

Variables
volatile uint8_t	byteFromHost
	Contains the last byte received from the host. More...
uint8_t	charsInRbuf0
volatile char	cksum0
	Keeps track of the Checksum for USART0. It is automatically reset by command bytes. More...
uint8_t	computedChecksum
volatile uint8_t	hostCommandsLost
	Counts the number of commands lost due to buffer overrun. More...
volatile char	rbuf0 []
	Receive Buffer for UART0. More...
volatile uint8_t	tbuf1_head
volatile uint8_t	tbuf1_tail
FILE	uart0
FILE	uart1

Macro Definition Documentation

HOST_BAUD

#define HOST_BAUD   9600

HOST_UBRR

#define HOST_UBRR   (F_CPU/16/HOST_BAUD-1)

SENSOR_BAUD

#define SENSOR_BAUD   9600

SENSOR_UBRR

#define SENSOR_UBRR   (F_CPU/16/SENSOR_BAUD-1)

UART0_BUFSIZE

#define UART0_BUFSIZE   40

Size of the UART0 Buffers.

UART0_DE_MASK

#define UART0_DE_MASK   0x04

UART0_PORT

#define UART0_PORT   PORTE

UART1_BUFSIZE

#define UART1_BUFSIZE   200

UART1 really communicates, so a little more.

UART1_CTS_MASK

#define UART1_CTS_MASK   0x20

UART1_DE_MASK

#define UART1_DE_MASK   0x02

UART1_PIN

#define UART1_PIN   PIND

UART1_PORT

#define UART1_PORT   PORTD

UART1_RTS_MASK

#define UART1_RTS_MASK   0x10

USE_RTS

#define USE_RTS

Function Documentation

AssertRTS()

static void AssertRTS ( void  )

inlinestatic

Asserts RTS to the Host Line, i.e. allows the Host to send Data.

References config, UART1_PORT, UART1_RTS_MASK, and confStruct_t::useRts.

Referenced by CmdCalibrate(), CmdDistance(), DoCflags(), EnterDouble(), InitUart(), and ReadIntelHex().

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hprintf_P()

int hprintf_P	(	const char *	fmt,
			...
	)

printf_P for Communication with the Host

Parameters

fmt	Format String
...	Additional Parameters

Returns

The return value of the underlying vfprintf_P

References uart1.

Referenced by CmdAnalog(), CmdCalibrate(), CmdClearErrors(), CmdDebug(), CmdDistance(), CmdDumpConf(), CmdFTest(), CmdGetSensorValues(), CmdHelp(), CmdReset(), CmdSetBright(), CmdSetCistern(), CmdSetContrast(), CmdSetDCFInv(), CmdSetDisplay(), CmdSetOcr(), CmdSetPTime(), CmdSetPTimeK(), CmdSetSignal(), CmdSetSounds(), CmdSetSpontaneous(), CmdSetTime(), CmdStat(), CmdUseRts(), CmdWrite(), DCF77int(), DoCflags(), DoOneLine(), DoTflags(), DumpConfig(), DumpConfigSignal(), ExecCommand(), ExtraIgnored(), FTest(), FTestSupply(), FTestSWUnreg(), FTestToggleSignal(), FTestWalkingOne(), FTestWalkingZero(), HexDump(), MissingArg(), PrintError(), PrintPass(), ProgramSensor(), PushBit(), ReadIntelHex(), RTCsync(), UpdateSensorFirmware(), VerifySensor(), and VerifySensorFirmware().

InitUart()

void InitUart

(

void

)

Initialize USART Hardware and Pointers.

2 Stop-bits are used, USART0 connects to the sensor, uses 9-bit mode and parity, USART1 connects to the Host at 9600 baud, 8 bits and no parity.

References AssertRTS(), HOST_UBRR, and SENSOR_UBRR.

Referenced by Init().

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putc0()

void putc0

(

char

c

)

Sends a Command Char (bit9=1) over USART0.

Parameters

c	The Character

References cksum0, and put0().

Referenced by BootldRead(), BootldWrite(), UpdateSensorFirmware(), and VerifySensorFirmware().

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putchar_uart1()

int putchar_uart1	(	char	c,
		FILE *	stream
	)

The Putchar-Routine for USART1 (Host-Interface)

Note

This routine blocks when the transmit buffer is full.

Parameters

c	The Character
stream	A Pointer to the File (unused)

Returns

Always 0

References putc1().

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putd0()

void putd0

(

char

c

)

Sends a Data Char (bit9=0) over USART0.

Parameters

c	The Character

References put0().

Referenced by BootldRead(), and BootldWrite().

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ReleaseRTS()

static void ReleaseRTS ( void  )

inlinestatic

Releases RTS to the Host Line, i.e. stops the Host from sending Data.

References config, UART1_PORT, UART1_RTS_MASK, and confStruct_t::useRts.

Referenced by ISR().

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Tbub1IsEmpty()

bool Tbub1IsEmpty

(

void

)

Tell if Transmit Buffer 1 is empty.

Returns

True if empty, False if not

References tbuf1_head, and tbuf1_tail.

Referenced by DoTflags().

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Uart0DisableLineDriver()

static void Uart0DisableLineDriver ( void  )

inlinestatic

Disables the RS485 Line Driver on Uart0.

References UART0_DE_MASK, and UART0_PORT.

Referenced by FTest485GetConnects(), and ISR().

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Uart0EnableLineDriver()

static void Uart0EnableLineDriver ( void  )

inlinestatic

Enables the RS485 Line Driver on Uart0.

References UART0_DE_MASK, and UART0_PORT.

Referenced by FTest485GetConnects(), and put0().

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Uart1DisableLineDriver()

static void Uart1DisableLineDriver ( void  )

inlinestatic

Disables the RS485 Line Driver on Uart1.

References UART1_DE_MASK, and UART1_PORT.

Referenced by FTest485GetConnects(), and ISR().

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Uart1EnableLineDriver()

static void Uart1EnableLineDriver ( void  )

inlinestatic

Enables the RS485 Line Driver on Uart1.

References UART1_DE_MASK, and UART1_PORT.

Referenced by FTest485GetConnects(), and ISR().

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usart1FlushRx()

void usart1FlushRx

(

void

)

References CFLAG_BTRECEIVED, CFLAG_BYTERECEIVED, CFLAG_CMDRECEIVED, cFlags, and rbuf1_ptr.

Referenced by CmdCalibrate().

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UsartTimerCallback()

static void UsartTimerCallback ( void  )

inlinestatic

Timer Callback. Checks for CTS from the Host to resume Communication.

This function re-enables interrupts after CTS becomes true again and must be called periodically e.g. from timer interrupt.

References config, tbuf1_head, tbuf1_tail, UART1_CTS_MASK, UART1_PIN, and confStruct_t::useRts.

Referenced by ISR().

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Variable Documentation

byteFromHost

volatile uint8_t byteFromHost

Contains the last byte received from the host.

Referenced by CmdCalibrate(), and ISR().

charsInRbuf0

uint8_t charsInRbuf0

Referenced by DoCflags(), and ISR().

cksum0

volatile char cksum0

Keeps track of the Checksum for USART0. It is automatically reset by command bytes.

Referenced by BootldRead(), BootldWrite(), put0(), and putc0().

computedChecksum

uint8_t computedChecksum

Referenced by DoCflags(), and ISR().

hostCommandsLost

volatile uint8_t hostCommandsLost

Counts the number of commands lost due to buffer overrun.

Referenced by CmdStat(), and ISR().

rbuf0

volatile char rbuf0[]

Receive Buffer for UART0.

Referenced by DoCflags(), and ISR().

tbuf1_head

volatile uint8_t tbuf1_head

Referenced by ISR(), putc1(), Tbub1IsEmpty(), and UsartTimerCallback().

tbuf1_tail

volatile uint8_t tbuf1_tail

Referenced by ISR(), putc1(), Tbub1IsEmpty(), and UsartTimerCallback().

uart0

FILE uart0

uart1

FILE uart1

Referenced by hprintf_P().