Difference between revisions of "ADC"
| Line 59: | Line 59: | ||
uint16_t adc_result0,adc_result1; | uint16_t adc_result0,adc_result1; | ||
| − | LCD_Init(8,2,16); | + | LCD_Init(8,2,16); /* Initialize the lcd(8-bit 2X16type) */ |
| − | ADC_Init(); | + | ADC_Init(); /* Initialize the adc before starting the conversion */ |
LCD_DisplayString(" 2-Channel ADC "); | LCD_DisplayString(" 2-Channel ADC "); | ||
| − | while(1) | + | while(1) /* Display the adc channel zero,One values continuously */ |
{ | { | ||
adc_result0= ADC_GetAdcValue(0); /*Get the adc values of ch0, ch1*/ | adc_result0= ADC_GetAdcValue(0); /*Get the adc values of ch0, ch1*/ | ||
adc_result1= ADC_GetAdcValue(1); | adc_result1= ADC_GetAdcValue(1); | ||
| − | LCD_GoToLine(E_LcdLineTwo); | + | LCD_GoToLine(E_LcdLineTwo); /*Display the adc values on LCD*/ |
LCD_Printf("C0:%d C1:%d ",adc_result0,adc_result1); | LCD_Printf("C0:%d C1:%d ",adc_result0,adc_result1); | ||
} | } | ||
Revision as of 08:48, 10 January 2015
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
| Definition | void ADC_Init() |
| Input Arguments | none |
| Return Value | none |
| Description | This function initializes the ADC module. |
| Usage | void main()
{ ADC_Init(); } |
ADC_GetAdcValue
| Definition | uint16_t ADC_GetAdcValue(uint8_t var_adcChannel_u8) |
| 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 2-channel ADC. The resultant 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 */ int main() { uint16_t adc_result0,adc_result1; LCD_Init(8,2,16); /* Initialize the lcd(8-bit 2X16type) */ ADC_Init(); /* Initialize the adc before starting the conversion */ LCD_DisplayString(" 2-Channel ADC "); while(1) /* Display the adc channel zero,One values continuously */ { adc_result0= ADC_GetAdcValue(0); /*Get the adc values of ch0, ch1*/ adc_result1= ADC_GetAdcValue(1); LCD_GoToLine(E_LcdLineTwo); /*Display the adc values on LCD*/ LCD_Printf("C0:%d C1:%d ",adc_result0,adc_result1); } return 0; }