Fitur ADC STM32F100

ADC (Analog Digital Converter)

Things to remember that bit of ADC on STM32 is 12 bit. 2^12 = 4096.

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_adc.h"
#include "stm32f10x_dma.h"

ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;

void RCC_config(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_AHBPeriphClockCmd (RCC_AHBPeriph_DMA1 , ENABLE);
}

void GPIO_config(void)
{
//ADC1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | \
                     GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void ADC_config(void)

{

//clock ADC (max 14MHz --> 24/2=12MHz)

RCC_ADCCLKConfig (RCC_PCLK2_Div2);

//ADC Init

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

ADC_InitStructure.ADC_ScanConvMode = ENABLE;

ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;

ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;

ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

ADC_InitStructure.ADC_NbrOfChannel = 6;

ADC_Init ( ADC1, &ADC_InitStructure);

ADC_RegularChannelConfig(ADC1,ADC_Channel_0, 1,ADC_SampleTime_239Cycles5);

ADC_RegularChannelConfig(ADC1,ADC_Channel_1, 2,ADC_SampleTime_239Cycles5);

ADC_RegularChannelConfig(ADC1,ADC_Channel_2, 3,ADC_SampleTime_239Cycles5);

ADC_RegularChannelConfig(ADC1,ADC_Channel_3, 4,ADC_SampleTime_239Cycles5);

ADC_RegularChannelConfig(ADC1,ADC_Channel_4, 5,ADC_SampleTime_239Cycles5);

ADC_RegularChannelConfig(ADC1,ADC_Channel_5, 6,ADC_SampleTime_239Cycles5);

ADC_DMACmd(ADC1, ENABLE);

ADC_Cmd (ADC1,ENABLE);

//ADC_ITConfig(ADC1,ADC_IT_EOC, ENABLE);

// calibration

ADC_ResetCalibration(ADC1);

while(ADC_GetResetCalibrationStatus(ADC1));

ADC_StartCalibration(ADC1);

while(ADC_GetCalibrationStatus(ADC1));

//conversion

ADC_SoftwareStartConvCmd(ADC1, ENABLE);

}

uint16_t ADC_ConvertedValue[6];

void DMA_config (void)

{

DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;

DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &ADC_ConvertedValue;

DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

DMA_InitStructure.DMA_BufferSize = 6;

DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;

DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;

DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

DMA_InitStructure.DMA_Priority = DMA_Priority_High;

DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

DMA_Init(DMA1_Channel1, &DMA_InitStructure);

DMA_Cmd(DMA1_Channel1, ENABLE);

}

sprintf(kata2,"%d %d %d %d %d %d \n\r", \

ADC_ConvertedValue[0],ADC_ConvertedValue[1],ADC_ConvertedValue[2], \

ADC_ConvertedValue[3],ADC_ConvertedValue[4],ADC_ConvertedValue[5]);

usart_puts(kata2);