EMBEDDED C · 24 lessons

8051·STM32 register-level — no HAL, Keil μVision simulator

24 lessons of register-level embedded C with no HAL — SFR·CMSIS, GPIO·timer·interrupt·UART·ADC·PWM, plus debouncing·ring buffer·HAL abstraction·capstone. Verified with PC gcc and the μVision simulator.

Start the track

Part 1: Foundations (shared — verified with PC gcc)

5 lessons

Lesson 01

Getting Started with Embedded C and Keil μVision

Embedded C, the `while(1)` skeleton and the build/debug flow

Embedded Cwhile(1) skeletonBuild/debug flow

Lesson 02

Data Types, Number Bases, stdint & sizeof

Exact bit widths and `uint8/16/32_t`

Exact bit widthsuint8/16/32_t

Lesson 03

Bit Operations & Register Manipulation

set/clear/toggle and bit masks

set/clear/toggleMasks

Lesson 04

Pointers, volatile & Memory-Mapped I/O

Registers as addresses and the role of `volatile`

Registers = addressesvolatile

Lesson 05

Functions, Header Files & #define Macros

Modularity and header guards

ModularityHeader guards

Part 2: 8051 (Keil C51 / AT89C52)

7 lessons

Lesson 06

8051 Architecture, SFRs & reg52.h

SFRs and `sbit`/`sfr`

SFRssbit/sfr

Lesson 07

GPIO Output — Blinking an LED

Port output and active-low wiring

Port outputActive low

Lesson 08

GPIO Input — Buttons & Switches

Reading quasi-bidirectional ports

Quasi-bidirectional portsInput

Lesson 09

Timer 0/1 & Delays

Hardware timers

Lesson 10

External & Timer Interrupts

`interrupt N`

interrupt N

Lesson 11

UART Serial Communication

Serial transmit and receive

Serial transmit/receive

Lesson 12

7-Segment Display (Multiplexing)

Lookup tables and dynamic driving

Lookup tablesDynamic driving

Part 3: STM32 (Keil MDK-ARM / STM32F103C8, direct register control)

8 lessons

Lesson 13

Cortex-M, CMSIS & the Clock Tree

CMSIS, RCC and the clock tree

CMSISRCCClock tree

Lesson 14

LED with RCC & GPIO Registers

CRL/CRH and ODR/BSRR

CRL/CRHODR/BSRR

Lesson 15

GPIO Input, Pull-up/Pull-down

IDR and internal pull-ups

IDRInternal pull-ups

Lesson 16

SysTick Timer & Precise Delays

`SysTick_Config` and millisecond ticks

SysTick_ConfigMillisecond ticks

Lesson 17

General-Purpose Timers & PWM Output

PSC/ARR/CCR and PWM

PSC/ARR/CCRPWM

Lesson 18

NVIC Interrupts & EXTI

EXTI and clearing pending flags

EXTIClearing pending flags

Lesson 19

USART Serial Communication

BRR and TXE/RXNE

BRRTXE/RXNE

Lesson 20

ADC Analog Input

12-bit conversion and scaling

12-bit conversionScaling

Part 4: Applications & Patterns

4 lessons

Lesson 21

Debouncing & Finite State Machines

Shared application patterns

Shared patterns

Lesson 22

Ring Buffers & Interrupt-Driven UART Reception

Shared application patterns

Shared patterns

Lesson 23

HAL Abstraction, Module Separation & Portability

Shared patterns, plus the Arduino Uno/AVR extension

Shared patternsArduino Uno/AVR extension

Lesson 24

Capstone — Control LEDs & Timers over UART Commands

MDK capstone

MDKCapstone