Mikroelektronika MIKROE-742 데이터 시트
ADC LIBRARY
ADC (Analog to Digital Converter) module is available with a number of AVR micros. Library function
ADC_Read
is included to provide you comfortable work with the module in single-ended mode.
ADC_Read
Library Example
This example code reads analog value from channel 2 and displays it on PORTB and PORTC.
program ADC_on_LEDs;
var adc_rd : word;
var adc_rd : word;
begin
DDRB := 0xFF;
// Set PORTB as output
DDRC := 0xFF;
// Set PORTC as output
while TRUE do
begin
adc_rd := ADC_Read(2); // get ADC value from 2nd channel
PORTB := adc_rd;
// display adc_rd[7..0]
PORTC := Hi(adc_rd); // display adc_rd[9..8]
end;
end.
185
MIKROELEKTRONIKA
- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD
Libraries
mikroPASCAL PRO for AVR
CHAPTER 6
Prototype
function ADC_Read( channel : byte ) : word;
Returns
10-bit or 12-bit (MCU dependent) unsigned value from the specified
channel
.
Description
Initializes AVR ’s internal ADC module to work with XTAL frequency prescaled by
128. Clock determines the time period necessary for performing A/D conversion.
128. Clock determines the time period necessary for performing A/D conversion.
Parameter
channel
represents the channel from which the analog value is to be
acquired. Refer to the appropriate datasheet for channel-to-pin mapping.
Requires
Nothing.
Example
var tmp : word;
...
...
tmp := ADC_Read(2); // Read analog value from channel 2
Library Example
Library Example