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Built-in Functions
setup_qei( )
Syntax:
setup_qei( options, filter, maxcount );
Parameters: Options - The mode of the QEI module. See the devices .h file for all options
Some common options are:
· QEI_MODE_X2
· QEI_MODE_X4
filter - This parameter is optional, the user can enable the digital filters and
specify the clock divisor.
maxcount - Specifies the value at which to reset the position counter.
Returns:
Function:
void
Configures the Quadrature Encoder Interface. Various settings
like mode and filters can be setup.
Availability: Devices that have the QEI module.
Requires:
Nothing.
Examples: setup_qei(QEI_MODE_X2|QEI_RESET_WHEN_MAXCOUNT,
QEI_FILTER_ENABLE_QEA|QEI_FILTER_DIV_2,0x1000);
Example
Files:
Also See:
None
qei_set_count() , qei_get_count() , qei_status()
setup_rtc( )
Syntax:
setup_rtc() ( options, calibration );
Parameters: Options - The mode of the RTCC module. See the devices .h file for all
options
Calibration - This parameter is optional and the user can specify an 8 bit
value that will get written to the calibration configuration register.
Returns:
Function:
Availability:
void
Configures the Real Time Clock and Calendar module. The module requires
an external 32.768 kHz clock crystal for operation.
Devices that have the RTCC module.
275
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