Difference between revisions of "ADC"
(→ADC_GetAdcValue) |
|||
| Line 30: | Line 30: | ||
{{#Widget:LibTable}} | {{#Widget:LibTable}} | ||
|- | |- | ||
| − | |Defination || uint16_t ADC_GetAdcValue(uint8_t channel) | + | |Defination || '''uint16_t ADC_GetAdcValue(uint8_t channel)''' |
|- | |- | ||
| − | | Input Arguments || uint8_t(channel number). | + | | Input Arguments || '''uint8_t(channel number).''' |
|- | |- | ||
| − | | Return Value|| uint16_t(10 bit ADC result) | + | | Return Value|| '''uint16_t(10 bit ADC result)''' |
|- | |- | ||
| Description || This function does the ADC conversion for the Selected Channel and returns the converted 10bit result. | | Description || This function does the ADC conversion for the Selected Channel and returns the converted 10bit result. | ||
Revision as of 23:02, 20 December 2014
Contents
[hide]ADC
This library provides the functions for initializing the adc and to get the raw adc values. In case of AVR/PIC/ARM or other high end controllers the inbuilt adc is used. In case of 8051/8052 as it doesn't have an inbuilt adc, ADC0809(8-bit) adc is used.
ADC_Init
{{#Widget:LibTable}}| Defination | void ADC_Init() |
| Input Arguments | none |
| Return Value | none |
| Description | This function initializes the ADC module. |
| Usage | void main()
{ ADC_Init(); } |
ADC_GetAdcValue
{{#Widget:LibTable}}| Defination | uint16_t ADC_GetAdcValue(uint8_t channel) |
| Input Arguments | uint8_t(channel number). |
| Return Value | uint16_t(10 bit ADC result) |
| Description | This function does the ADC conversion for the Selected Channel and returns the converted 10bit result.
The adc value per bit depends on the resolution of the ADC. For AVR/PIC(10-bit adc) the adc value per lsb will be 5/1023=0048v |
| Usage | uint16_t adc_result;
adc_result = ADC_GetAdcValue(0); //Adc value for channel 0 |
User guide
Program to demonstrate multi(4) channel ADC, 10bit(0-1023) adc value is displayed on lcd
- #include "lcd.h" //User defined LCD library which contains the lcd routines
- #include "adc.h" //User defined library which contains the adc routines
- /* start the main program */
- void main()
- {
- uint16_t adc_result0,adc_result1;
- /* Initialize the lcd before displaying any thing on the lcd */
- LCD_Init(8,LCD_16x2);
- /* Initialize the adc before starting the conversion */
- ADC_Init();
- LCD_DisplayString(" 2-Channel ADC ");
- /* Display the adc channel zero,One values continuously */
- while(1)
- {
- /*Get the adc values of the first four channels(0-3) */
- adc_result0= ADC_GetAdcValue(0);
- adc_result1= ADC_GetAdcValue(1);
- /*Display the adc values on LCD*/
- LCD_GoToLine(LCD_LineOne);
- LCD_Printf("C0:%d C1:%d ",adc_result0,adc_result1);
- }
- }