Joel Pallent / Mbed 2 deprecated Elec241-adc

c

Dependencies:   mbed

ADC.c

Committer:
Joelpallent
Date:
2018-05-31
Revision:
0:7088bc4c9949

File content as of revision 0:7088bc4c9949:

#include "ADC.h"



void init_ADC(void)
{
    RCC->AHB1ENR|=RCC_AHB1ENR_GPIOCEN;  //GPIOC clock enable
    ADC_input_port->MODER|=(3u<<(2*ADC_input_pin)); //ADC input pin is analogue mode
    
    RCC->APB2ENR|=RCC_APB2ENR_ADC1EN;       //ADC clock enable
    ADC1->SQR1&=~ADC_SQR1_L;                        //set number of conversions per sequence to 1
    ADC1->SQR3&=~ADC_SQR3_SQ1;                  //clear channel select bits
    ADC1->SQR3|=ADC_Channel;                        //set channel
    ADC1->CR2|=ADC_CR2_ADON;                        //enable ADC
    
}


unsigned short read_adc(void)
{
    ADC1->CR2|=ADC_CR2_SWSTART;         //start ADC conversion
    while((ADC1->SR&ADC_SR_EOC)==0);    //wait for ADC conversion complete
    return ADC1->DR;                    //return converted value
}