Joel Pallent / Mbed 2 deprecated Elec241-adc

c

Dependencies:   mbed

ADC.c@0:7088bc4c9949, 2018-05-31 (annotated)

Committer:
Joelpallent
Date:
Thu May 31 19:30:01 2018 +0000
Revision:
0:7088bc4c9949
c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Joelpallent 0:7088bc4c9949 1 #include "ADC.h"
Joelpallent 0:7088bc4c9949 2
Joelpallent 0:7088bc4c9949 3
Joelpallent 0:7088bc4c9949 4
Joelpallent 0:7088bc4c9949 5 void init_ADC(void)
Joelpallent 0:7088bc4c9949 6 {
Joelpallent 0:7088bc4c9949 7 RCC->AHB1ENR|=RCC_AHB1ENR_GPIOCEN; //GPIOC clock enable
Joelpallent 0:7088bc4c9949 8 ADC_input_port->MODER|=(3u<<(2*ADC_input_pin)); //ADC input pin is analogue mode
Joelpallent 0:7088bc4c9949 9
Joelpallent 0:7088bc4c9949 10 RCC->APB2ENR|=RCC_APB2ENR_ADC1EN; //ADC clock enable
Joelpallent 0:7088bc4c9949 11 ADC1->SQR1&=~ADC_SQR1_L; //set number of conversions per sequence to 1
Joelpallent 0:7088bc4c9949 12 ADC1->SQR3&=~ADC_SQR3_SQ1; //clear channel select bits
Joelpallent 0:7088bc4c9949 13 ADC1->SQR3|=ADC_Channel; //set channel
Joelpallent 0:7088bc4c9949 14 ADC1->CR2|=ADC_CR2_ADON; //enable ADC
Joelpallent 0:7088bc4c9949 15
Joelpallent 0:7088bc4c9949 16 }
Joelpallent 0:7088bc4c9949 17
Joelpallent 0:7088bc4c9949 18
Joelpallent 0:7088bc4c9949 19 unsigned short read_adc(void)
Joelpallent 0:7088bc4c9949 20 {
Joelpallent 0:7088bc4c9949 21 ADC1->CR2|=ADC_CR2_SWSTART; //start ADC conversion
Joelpallent 0:7088bc4c9949 22 while((ADC1->SR&ADC_SR_EOC)==0); //wait for ADC conversion complete
Joelpallent 0:7088bc4c9949 23 return ADC1->DR; //return converted value
Joelpallent 0:7088bc4c9949 24 }