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PCD
mode - Analog to digital mode. The valid options vary depending on the
device. See the devices .h file for all options. Some typical options include:
Parameters:
Returns:
Function:
Availability:
Requires:
Examples:
Example
? ADC_OFF
? ADC_CLOCK_INTERNAL
? ADC_CLOCK_DIV_32
undefined
Configures the analog to digital converter.
Only the devices with built in analog to digital converter.
Constants are defined in the devices .h file.
setup_adc_ports( ALL_ANALOG );
setup_adc(ADC_CLOCK_INTERNAL );
set_adc_channel( 0 );
value = read_adc();
setup_adc( ADC_OFF );
ex_admm.c
Files:
setup_adc_ports(), set_adc_channel(), read_adc(), #DEVICE, ADC Overview,
see header file for device selected
Also See:
setup_adc_ports( )
Syntax:
setup_adc_ports ( value )
setup_adc_ports ( ports, [ reference ])
Parameters: value - a constant defined in the devices .h file
ports - is a constant specifying the ADC pins to use
reference - is an optional constant specifying the ADC reference to use
By default, the reference voltage are Vss and Vdd
Returns:
Function:
undefined
Sets up the ADC pins to be analog, digital, or a combination and the voltage
reference to use when computing the ADC value. The allowed analog pin
combinations vary depending on the chip and are defined by using the bitwise OR
to concatenate selected pins together. Check the device include file for a complete
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