QEI_Public_Functions
[QEI]

Calculates the actual velocity in RPM passed via velocity capture value and Pulse Per Round (of the encoder) value parameter input.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulVelCapValue	Velocity capture input value that can be got from QEI_GetVelocityCap() function
[in]	ulPPR	Pulse per round of encoder

Returns:

The actual value of velocity in RPM (Round per minute)

Definition at line 474 of file lpc17xx_qei.c.

Fills each QIE_InitStruct member with its default value:

• DirectionInvert = QEI_DIRINV_NONE
• SignalMode = QEI_SIGNALMODE_QUAD
• CaptureMode = QEI_CAPMODE_4X
• InvertIndex = QEI_INVINX_NONE.

Parameters:

[in]

QIE_InitStruct

Pointer to a QEI_CFG_Type structure which will be initialized.

Returns:

None

Definition at line 154 of file lpc17xx_qei.c.

De-initializes the QEI peripheral registers to their default reset values.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

None

Definition at line 135 of file lpc17xx_qei.c.

Get current index counter of QEI peripheral.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

Current value of QEI index counter

Definition at line 226 of file lpc17xx_qei.c.

Check whether if specified interrupt flag status in QEI peripheral is set or not.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulIntType	Interrupt Flag Status type, should be: QEI_INTFLAG_INX_Int: index pulse was detected interrupt QEI_INTFLAG_TIM_Int: Velocity timer over flow interrupt QEI_INTFLAG_VELC_Int: Capture velocity is less than compare interrupt QEI_INTFLAG_DIR_Int: Change of direction interrupt QEI_INTFLAG_ERR_Int: An encoder phase error interrupt QEI_INTFLAG_ENCLK_Int: An encoder clock pulse was detected interrupt QEI_INTFLAG_POS0_Int: position 0 compare value is equal to the current position interrupt QEI_INTFLAG_POS1_Int: position 1 compare value is equal to the current position interrupt QEI_INTFLAG_POS2_Int: position 2 compare value is equal to the current position interrupt QEI_INTFLAG_REV_Int: Index compare value is equal to the current index count interrupt QEI_INTFLAG_POS0REV_Int: Combined position 0 and revolution count interrupt QEI_INTFLAG_POS1REV_Int: Combined position 1 and revolution count interrupt QEI_INTFLAG_POS2REV_Int: Combined position 2 and revolution count interrupt

Returns:

New State of specified interrupt flag status (SET or RESET)

Definition at line 353 of file lpc17xx_qei.c.

Get current position value in QEI peripheral.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

Current position value of QEI peripheral

Definition at line 182 of file lpc17xx_qei.c.

Check whether if specified flag status is set or not.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulFlagType	Status Flag Type, should be one of the following: QEI_STATUS_DIR: Direction Status

Returns:

New Status of this status flag (SET or RESET)

Definition at line 170 of file lpc17xx_qei.c.

Get current timer counter in QEI peripheral.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

Current timer counter in QEI peripheral

Definition at line 274 of file lpc17xx_qei.c.

Get current velocity pulse counter in current time period.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

Current velocity pulse counter value

Definition at line 285 of file lpc17xx_qei.c.

Get the most recently measured velocity of the QEI.

When the Velocity timer in QEI is over-flow, the current velocity value will be loaded into Velocity Capture register.

Parameters:

[in]

QEIx

QEI peripheral, should be QEI

Returns:

The most recently measured velocity value

Definition at line 298 of file lpc17xx_qei.c.

Initializes the QEI peripheral according to the specified parameters in the QEI_ConfigStruct.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	QEI_ConfigStruct	Pointer to a QEI_CFG_Type structure that contains the configuration information for the specified QEI peripheral

Returns:

None

Definition at line 94 of file lpc17xx_qei.c.

Clear (force) specified interrupt (pending) in QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulIntType	Interrupt Flag Status type, should be: QEI_INTFLAG_INX_Int: index pulse was detected interrupt QEI_INTFLAG_TIM_Int: Velocity timer over flow interrupt QEI_INTFLAG_VELC_Int: Capture velocity is less than compare interrupt QEI_INTFLAG_DIR_Int: Change of direction interrupt QEI_INTFLAG_ERR_Int: An encoder phase error interrupt QEI_INTFLAG_ENCLK_Int: An encoder clock pulse was detected interrupt QEI_INTFLAG_POS0_Int: position 0 compare value is equal to the current position interrupt QEI_INTFLAG_POS1_Int: position 1 compare value is equal to the current position interrupt QEI_INTFLAG_POS2_Int: position 2 compare value is equal to the current position interrupt QEI_INTFLAG_REV_Int: Index compare value is equal to the current index count interrupt QEI_INTFLAG_POS0REV_Int: Combined position 0 and revolution count interrupt QEI_INTFLAG_POS1REV_Int: Combined position 1 and revolution count interrupt QEI_INTFLAG_POS2REV_Int: Combined position 2 and revolution count interrupt

Returns:

None

Definition at line 455 of file lpc17xx_qei.c.

Enable/Disable specified interrupt in QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulIntType	Interrupt Flag Status type, should be: QEI_INTFLAG_INX_Int: index pulse was detected interrupt QEI_INTFLAG_TIM_Int: Velocity timer over flow interrupt QEI_INTFLAG_VELC_Int: Capture velocity is less than compare interrupt QEI_INTFLAG_DIR_Int: Change of direction interrupt

• QEI_INTFLAG_ERR_Int: An encoder phase error interrupt
  • QEI_INTFLAG_ENCLK_Int: An encoder clock pulse was detected interrupt
  • QEI_INTFLAG_POS0_Int: position 0 compare value is equal to the current position interrupt
  • QEI_INTFLAG_POS1_Int: position 1 compare value is equal to the current position interrupt
  • QEI_INTFLAG_POS2_Int: position 2 compare value is equal to the current position interrupt
  • QEI_INTFLAG_REV_Int: Index compare value is equal to the current index count interrupt
  • QEI_INTFLAG_POS0REV_Int: Combined position 0 and revolution count interrupt
  • QEI_INTFLAG_POS1REV_Int: Combined position 1 and revolution count interrupt
  • QEI_INTFLAG_POS2REV_Int: Combined position 2 and revolution count interrupt

    Parameters:

    [in]

    NewState

    New function state, should be:

  • DISABLE
  • ENABLE

    Returns:

    None

Definition at line 387 of file lpc17xx_qei.c.

Sets (forces) specified interrupt in QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulIntType	Interrupt Flag Status type, should be: QEI_INTFLAG_INX_Int: index pulse was detected interrupt QEI_INTFLAG_TIM_Int: Velocity timer over flow interrupt QEI_INTFLAG_VELC_Int: Capture velocity is less than compare interrupt QEI_INTFLAG_DIR_Int: Change of direction interrupt QEI_INTFLAG_ERR_Int: An encoder phase error interrupt QEI_INTFLAG_ENCLK_Int: An encoder clock pulse was detected interrupt QEI_INTFLAG_POS0_Int: position 0 compare value is equal to the current position interrupt QEI_INTFLAG_POS1_Int: position 1 compare value is equal to the current position interrupt QEI_INTFLAG_POS2_Int: position 2 compare value is equal to the current position interrupt QEI_INTFLAG_REV_Int: Index compare value is equal to the current index count interrupt QEI_INTFLAG_POS0REV_Int: Combined position 0 and revolution count interrupt QEI_INTFLAG_POS1REV_Int: Combined position 1 and revolution count interrupt QEI_INTFLAG_POS2REV_Int: Combined position 2 and revolution count interrupt

Returns:

None

Definition at line 424 of file lpc17xx_qei.c.

Resets value for each type of QEI value, such as velocity, counter, position, etc.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulResetType	QEI Reset Type, should be one of the following: QEI_RESET_POS: Reset Position Counter QEI_RESET_POSOnIDX: Reset Position Counter on Index signal QEI_RESET_VEL: Reset Velocity QEI_RESET_IDX: Reset Index Counter

Returns:

None

Definition at line 77 of file lpc17xx_qei.c.

Set value of sampling count for the digital filter in QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulSamplingPulse	Value of sampling count to set

Returns:

None

Definition at line 323 of file lpc17xx_qei.c.

Set value for index compare in QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulIndexComp	Compare Index Value to set

Returns:

None

Definition at line 238 of file lpc17xx_qei.c.

Set max position value for QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulMaxPos	Max position value to set

Returns:

None

Definition at line 194 of file lpc17xx_qei.c.

Set position compare value for QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	bPosCompCh	Compare Position channel, should be: QEI_COMPPOS_CH_0: QEI compare position channel 0 QEI_COMPPOS_CH_1: QEI compare position channel 1 QEI_COMPPOS_CH_2: QEI compare position channel 2
[in]	ulPosComp	Compare Position value to set

Returns:

None

Definition at line 210 of file lpc17xx_qei.c.

Set timer reload value for QEI peripheral.

When the velocity timer is over-flow, the value that set for Timer Reload register will be loaded into the velocity timer for next period. The calculated velocity in RPM therefore will be affect by this value.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	QEIReloadStruct	QEI reload structure

Returns:

None

Definition at line 253 of file lpc17xx_qei.c.

Set Velocity Compare value for QEI peripheral.

Parameters:

[in]	QEIx	QEI peripheral, should be QEI
[in]	ulVelComp	Compare Velocity value to set

Returns:

None

Definition at line 310 of file lpc17xx_qei.c.