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MICROCONTROLLERSChapter 8

STM32 Peripherials - ADC

Dr. Saeed Ebadollahi

References:

•ARM® Cortex® M4 Cookbook – Mark Fischer – Packt publishing – 2016

•The Definitive Guide to ARM Cortex-M3 and Cortex-M4 Processors – Joseph Yiu –Newnes – 2014

•Discovering the STM32 Microcontroller - Geoffrey Brown - 2012

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Introduction

Introduction (Cont.)

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How does it works ?

How does it works ? (Cont.)

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Signal Comparator

Sample and Hold Block

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Our Microcontroller

Different Types of ADCs

.1Successive Approximation ADC

.2Flash ADC

.3Sigma Delta ADC

.4Dual Slope ADC

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Flash ADC

Flash ADC

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Sigma Delta ADC

Sigma Delta ADC

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Sigma Delta ADC

•Visit this link for more information

a.pdf423a/slyt423www.ti.com/lit/an/slythttp://

Dual Slope ADC

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Dual Slope ADC

Getting Started with ADC in Cube

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Example 1:

•Write a code to read A1 pin voltage on your discovery board.

•First connect it to GND and then connect it to VDD and read numbers !

•Use debugger to read outputs.

Example 2:

•Write a code to read LDR

•Which kind of circuit we have to made for it ?

•Write a code to read potentiometer

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DMA

DMA (Cont.)

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DMA (Cont.)

Example 3:

•Use ADC DMA to read both of LDR and Potantiometer