IITM BS Embedded C Programming (CS2101): Syllabus and Tips

Embedded C Programming (CS2101) is a 4 credit course in the IITM BS in Electronic Systems on writing C for microcontrollers. It has a CS2 code, but it is a foundation level course, and you need it to finish the foundation. Its prerequisite is Introduction to C Programming (CS1101).

The syllabus names Prof. Nitin Chandrachoodan of the Department of Electrical Engineering, IIT Madras, as the instructor. The syllabus and the handbook agree on the level and the 4 credits, and both handbook tables give the same prerequisite.

What you learn in Embedded C

The course aims to teach you three things: how to tell types of microcontrollers apart and pick one for a job, how to write, run and debug programs on them, and how to connect them to outside parts to build simple embedded systems. The 12 weeks group like this:

• Weeks 1 to 3: microcontroller basics. What embedded systems and microcontrollers are, the basics of embedded C, and then programming and architecture of the STM32 family.
• Weeks 4 to 7: talking to other parts. Two blocks on connecting peripherals, one on digital communication protocols, and a practice week for problem solving.
• Weeks 8 to 10: organising bigger programs. Common design patterns and system structure for embedded software, an introduction to real-time operating systems (RTOS), and advanced embedded C ideas.
• Weeks 11 and 12: working like a professional. Development tools and debugging methods, then safety, ethics and professional practice.

The suggested books are class notes, The C Programming Language by Kernighan and Ritchie, and curated online material.

The lab and the diploma rule

• The Embedded C Programming Lab (CS2901) is a separate 1 credit lab. It uses development boards to practise GPIO, timers and the UART, I2C and SPI protocols.
• The handbook tables list CS2101 as a corequisite of that lab. The May 2026 lab policy calls it a prerequisite. If you plan to take both in one term, ask support first.
• When you register for diploma courses for the first time, CS2101 must already be done or be in that same term. Otherwise you cannot register for diploma courses. The same handbook line also names a "CS2109", a code that appears nowhere else.

The syllabus does not give a grading formula for this course.

Who finds it hard and how to prepare

This course leans on the harder parts of C: pointers, bit operations, structures and header files. On a microcontroller you also deal with hardware registers, where one wrong bit changes what the chip does.

• Revise pointers, structures, bit operations and multi-file projects from the C Programming Laboratory (CS1901) before week 1.
• Practise setting, clearing and testing single bits in a number until you can do it without looking anything up.
• Learn to use a debugger early. Stepping through code and watching values saves hours of guessing.
• Make a one-page note for each protocol you meet: how many wires it uses and how the two sides agree on timing.
• When a peripheral does not respond, check one thing at a time: power, pins, settings, then code.

What to take before and after

Before: Introduction to C Programming (CS1101). The C Programming course page covers it. With it or after: the Embedded C Lab, which also needs the C Programming Lab. The study plans put Embedded C in Term 3 on the medium and fastest plans and Term 5 on the comfortable plan. See ES study plans.

Common questions

Why is a CS2 course part of the foundation level?

The handbook places CS2101 in the foundation list, and the syllabus agrees. The course code does not decide the level. You need Embedded C to complete the foundation.

Which microcontroller does the course use?

The syllabus names STM32 in week 3. It does not name the exact board. Your course page will say which board and software to use.

Do I need to upload worked-out sheets in Embedded C?

No. At the foundation level, the handbook asks for worked-out sheets only in ESTC, EEC, Digital Systems and Maths 1.

Can I start diploma courses before finishing Embedded C?

Only if you take Embedded C in the same term as your first diploma courses. The handbook also asks you to finish the courses up to the Electronics Laboratory first.