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Bean
AsynchroMaster
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Asynchronous serial communication - master
Methods are user callable functions/subroutines that are means of controlling the bean functions.
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Methods:
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Enable
- Enables the bean - it starts send and receive functions. Events may be generated ("DisableEvent"/"EnableEvent").
ANSIC prototype: byte Enable(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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Disable
- Disables the bean - it stops the send and receive functions. No events will be generated.
ANSIC prototype: byte Disable(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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EnableEvent
- Enables the events. This method is available if the interrupt service/event property is enabled and at least one event is enabled.
ANSIC prototype: byte EnableEvent(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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DisableEvent
- Disables the events. This method is available if the interrupt service/event property is enabled and at least one event is enabled.
ANSIC prototype: byte DisableEvent(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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RecvChar
- If any data is received, this method returns one character, otherwise it returns an error code (it does not wait for data). This method is enabled only if the receiver property is enabled.
ANSIC prototype: byte RecvChar(BeanName_TComData *Chr)
- Chr: Pointer to BeanName_TComData - Pointer to a received character
- Return value:byte - Error code, possible codes:
ERR_OK - OK
ERR_SPEED - This device does not work in the active speed mode
ERR_RXEMPTY - No data in receiver
ERR_BREAK - Break character is detected (only when the Interrupt service property is disabled and the Break signal property is enabled)
ERR_COMMON - common error occurred (the GetError method can be used for error specification)
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SendChar
- Send one character to the channel. This method is available only if the transmitter property is enabled.
ANSIC prototype: byte SendChar(BeanName_TComData Chr)
- Chr:BeanName_TComData - Character to send
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_TXFULL - Transmitter is full
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RecvBlock
- If any data is received, this method returns the block of the data and its length (and incidental error), otherwise it returns an error code (it does not wait for data).
This method is available only if non-zero length of the input buffer is defined and the receiver property is enabled.
ANSIC prototype: byte RecvBlock(BeanName_TComData *Ptr,word Size,word *Rcv)
- Ptr: Pointer to BeanName_TComData - Pointer to the block of received data
- Size:word - Size of the block
- Rcv: Pointer to word - Pointer to real number of the received data
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_RXEMPTY - The receive buffer didn't contain the requested number of data. Only available data has been returned. ERR_COMMON - Common error occurred (the GetError method can be used for error specification)
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SendBlock
- Sends a block of characters to the channel.
This method is available only if non-zero length of the output buffer is defined and the transmitter property is enabled.
ANSIC prototype: byte SendBlock(BeanName_TComData *Ptr,word Size,word *Snd)
- Ptr: Pointer to BeanName_TComData - Pointer to the block of data to send
- Size:word - Size of the block
- Snd: Pointer to word - Pointer to number of data that are sent (moved to buffer)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_TXFULL - It was not possible to send requested number of bytes
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ClearRxBuf
- Clears the receive buffer.
This method is available only if non-zero length of the input buffer is defined and the receiver property is enabled.
ANSIC prototype: byte ClearRxBuf(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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ClearTxBuf
- Clears the transmit buffer.
This method is available only if non-zero length of the output buffer is defined and the receiver property is enabled.
ANSIC prototype: byte ClearTxBuf(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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CharsInRxBuf
- Returns the number of characters in the input buffer. This method is available only if the receiver property is enabled.
[deprecated method]
ANSIC prototype: byte CharsInRxBuf(word *Chr)
- Chr: Pointer to word - Pointer to the number of characters in the input buffer
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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GetCharsInRxBuf
- Returns the number of characters in the input buffer. This method is available only if the receiver property is enabled.
ANSIC prototype: word GetCharsInRxBuf(void)
- Return value:word - The number of characters in the input buffer.
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CharsInTxBuf
- Returns the number of characters in the output buffer. This method is available only if the transmitter property is enabled.
[deprecated method]
ANSIC prototype: byte CharsInTxBuf(word *Chr)
- Chr: Pointer to word - Pointer to the number of characters in the output buffer
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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GetCharsInTxBuf
- Returns the number of characters in the output buffer. This method is available only if the transmitter property is enabled.
ANSIC prototype: word GetCharsInTxBuf(void)
- Return value:word - The number of characters in the output buffer.
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GetError
- Returns a set of errors on the channel (errors that cannot be returned by given methods). The errors accumulate in a set; after calling GetError this set is returned and cleared.
ANSIC prototype: byte GetError(BeanName_TError *Err)
- Err: Pointer to BeanName_TError - Pointer to the returned set of errors
- Return value:byte - Error code (if GetError did not succeed), possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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GetBreak
- Tests the internal input break flag, returns it (whether the break has occurred or not) and clears it.
This method is available only if property Break signal is enabled.
ANSIC prototype: byte GetBreak(bool *Brk)
- Brk: Pointer to bool - Pointer to the returned internal break flag
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode
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SetBreak
- Sends the break sequence to the output line.
This method is available only if Break signal property is enabled.
ANSIC prototype: byte SetBreak(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_DISABLED - This bean is disabled by user
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SelectSlave
- Select the slave - sends the address of the slave for starting communication with it (the previous slave stops communicating).
ANSIC prototype: byte SelectSlave(byte Slv)
- Slv:byte - The new slave identification
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_DISABLED - This device is disabled ERR_BUSY - Transmitter buffer is not empty
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GetSelected
- Return the identification of the selected slave (0-254, or -1 if no slave is selected).
ANSIC prototype: byte GetSelected(byte *Slv)
- Slv: Pointer to byte - Pointer to identification of the slave
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_NOTAVAIL - Slave is not selected yet
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TurnTxOn
- Turns on the transmitter. This method is available only if the transmitter property is enabled.
ANSIC prototype: void TurnTxOn(void)
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TurnTxOff
- Turns off the transmitter. This method is available only if the transmitter property is enabled.
ANSIC prototype: void TurnTxOff(void)
- Methods for Freescale HC08, HCS08, HCS12, HCS12X and 56800 derivatives.
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TurnRxOn
- Turns on the receiver. This method is available only if the receiver property is enabled.
ANSIC prototype: void TurnRxOn(void)
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TurnRxOff
- Turns off the receiver. This method is available only if the receiver property is enabled.
ANSIC prototype: void TurnRxOff(void)
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SetIdle
- Sends the idle character to the output line.
This method is available only if the transmitter property is enabled.
ANSIC prototype: byte SetIdle(void)
- Return value:byte - Error code, possible codes:
ERR_OK - OK ERR_SPEED - This device does not work in the active speed mode ERR_DISABLED - This bean is disabled by user
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LoopMode
- Enables/disables the loop mode operation. In the loop mode the RxD pin is disconnected from the SCI, and the transmitter output goes into the receiver input.
ANSIC prototype: void LoopMode(bool Loop)
- Loop:bool - Switch loop mode
TRUE - Loop mode enabled FALSE - Normal mode enabled
- Methods for Freescale HC08, HCS08, HCS12 and HCS12X derivatives.
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Standby
- Puts the receiver into a standby state.
ANSIC prototype: void Standby(bool State)
- State:bool - Switch standby state
TRUE - Standby state FALSE - Normal operation
- Methods for Freescale HCS08, HCS12 and HCS12X derivatives.
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SetDirection
- Sets the direction of the TxD pin in the single wire mode
ANSIC prototype: void SetDirection(byte direction)
- direction:byte - Direction of the TxD pin in the single wire mode of the SCI device ('bean name'_TXD_INPUT or 'bean name'_TXD_OUTPUT).
- Methods for Freescale HC08, HCS08, HCS12, HCS12X and 56800 derivatives.
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GetRxIdle
- Returns the state of the receiver idle flag.
This method is available only if event OnIdle is disabled.
ANSIC prototype: bool GetRxIdle(void)
- Return value:bool - The state of the receiver idle flag.
- Methods for Freescale HC08, HCS08, HCS12, HCS12X and 56800 derivatives.
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GetTxComplete
- Returns whether the transmitter is finished transmitting all data, preamble, and break characters and is idle. It can be used to determine when it is safe to switch a line driver (e.g. in RS-485 applications).
This method is available only if event OnTxComplete is disabled.
ANSIC prototype: bool GetTxComplete(void)
- Return value:bool - Transmission process completeness.
Note: Some methods can be implemented as macros.
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Processor ExpertTM and Embedded BeansTM are registered trademarks of UNIS, Ltd.
©1997-2005, UNIS, Ltd.
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