STM32F4 potentiometer and ADC

HI,

#include ''stm32f4xx_adc.h''

#include ''stm32f4xx_gpio.h''

#include ''stm32f4xx_rcc.h''

#include ''pwm2.h''


void adc_configure(void){

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(void){

ADC_SoftwareStartConv(ADC1);//Start the conversion

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

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

}

1.
ConvertedValue = adc_convert(); //Read the ADC converted value
2.
printf(''%i\r\n'',ConvertedValue);