Cara mengakses ADC pada STM32F4 Discovery

Kebetulan waktu belajar ADC saya mencontoh orang yang menulikan ini. Dengan konsep , tiru, amankan , modifikasi saya menggunakan ini , dan hasilnya ya kurang lebih cukup memuaskan dan patut di coba dan dikembangkan lebih dalam lagi.Harusnya kalian juga melakukan hal yang sama , yaitu tiru amankan modifikasi .. hahaha selamat mencoba !!!




#include "stm32f4xx_adc.h"

#include "stm32f4xx_gpio.h"

#include "stm32f4xx_rcc.h"

 

int ConvertedValue = 0; //Converted value readed from ADC

 

 

void adc_configure(){

 ADC_InitTypeDef ADC_init_structure; //Structure for adc confguration

 GPIO_InitTypeDef GPIO_initStructre; //Structure for analog input pin

 //Clock configuration

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);//The ADC1 is connected the APB2 peripheral bus thus we will use its clock source

 RCC_AHB1PeriphClockCmd(RCC_AHB1ENR_GPIOCEN,ENABLE);//Clock for the ADC port!! Do not forget about this one ;)

 //Analog pin configuration

 GPIO_initStructre.GPIO_Pin = GPIO_Pin_0;//The channel 10 is connected to PC0

 GPIO_initStructre.GPIO_Mode = GPIO_Mode_AN; //The PC0 pin is configured in analog mode

 GPIO_initStructre.GPIO_PuPd = GPIO_PuPd_NOPULL; //We don't need any pull up or pull down

 GPIO_Init(GPIOC,&GPIO_initStructre);//Affecting the port with the initialization structure configuration

 //ADC structure configuration

 ADC_DeInit();

 ADC_init_structure.ADC_DataAlign = ADC_DataAlign_Right;//data converted will be shifted to right

 ADC_init_structure.ADC_Resolution = ADC_Resolution_12b;//Input voltage is converted into a 12bit number giving a maximum value of 4096

 ADC_init_structure.ADC_ContinuousConvMode = ENABLE; //the conversion is continuous, the input data is converted more than once

 ADC_init_structure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;// conversion is synchronous with TIM1 and CC1 (actually I'm not sure about this one :/)

 ADC_init_structure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//no trigger for conversion

 ADC_init_structure.ADC_NbrOfConversion = 1;//I think this one is clear :p

 ADC_init_structure.ADC_ScanConvMode = DISABLE;//The scan is configured in one channel

 ADC_Init(ADC1,&ADC_init_structure);//Initialize ADC with the previous configuration

 //Enable ADC conversion

 ADC_Cmd(ADC1,ENABLE);

 //Select the channel to be read from

 ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_144Cycles);

}

int adc_convert(){

 ADC_SoftwareStartConv(ADC1);//Start the conversion

 while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));//Processing the conversion

 return ADC_GetConversionValue(ADC1); //Return the converted data

}

int main(void){

 adc_configure();//Start configuration

    while(1){//loop while the board is working

     ConvertedValue = adc_convert();//Read the ADC converted value

    }

}