CCS C Compiler Manual PCB / PCM / PCH

Functional Overview
#DEVICE ADC=10
...
long value;
...
setup_adc(ADC_CLOCK_INTERNAL); //enables the a/d module
//and sets the clock to internal adc clock
setup_adc_ports(ALL_ANALOG); //sets all the adc pins to analog
set_adc_channel(0); //the next read_adc call will read channel 0
delay_us(10);
//a small delay is required after setting the channel
//and before read
value=read_adc();
//starts the conversion and reads the result
//and store it in value
read_adc(ADC_START_ONLY); //only starts the conversion
value=read_adc(ADC_READ_ONLY); //reads the result of the last conversion and store it in
//value. Assuming the device hat a 10bit ADC module,
//value will range between 0-3FF. If #DEVICE ADC=8
had //been used instead the result will yield 0-FF. If
#DEVICE //ADC=16 had been used instead the result
will yield 0-//FFC0
Analog Comparator
These functions set up the analog comparator module. Only available in some devices.
Relevant Functions:
setup_comparator(mode)
Relevant Preprocessor:
None
Relevant Interrupts:
INT_COMP
Relevant Include Files:
None, all functions built-in
Relevant getenv() Parameters:
Returns 1 if the device has a
comparator
Enables and sets the analog comparator module. The options
vary depending on the chip. Refer to the header file for
details.
Interrupt fires on comparator detect. Some chips have more
than one comparator unit, and thus, more interrupts.
COMP
Example Code:
43