Introduction to ARM Cortex M3 and M4 Processors

Explore ARM general purpose registers, a 32-bit register bank of 13 registers (r0–r12), used for data processing and control tasks, with 16-bit instructions accessing only the lower registers.

Learn how the stack pointer accesses main memory stack, how push and pop grow the stack downward by decrementing and incrementing, and how return addresses and locals are stored.

Explain the link register in Arm cortex m3 and m4, and how branch and link stores the return address in the link register for returning to the next instruction.

Explore how the program status register and related APSR, IPSR, and EPSR flags show processor status and conditions after instructions, including negative, zero, carry, and saturation.

Explain interrupt masking in ARM Cortex-M3 and M4, how high-priority interrupts preempt a running function, and how interrupt mask registers and the base priority register govern priorities.

Explore the ARM Cortex-M3 and M4 control register, learn how it selects the start point and toggles privileged access.

Arm Cortex memory system, focusing on the 32-bit address space that provides up to 4 gigabytes of linearly addressable memory and how external memory is interfaced.

Explore the ARM Cortex-M3 and M4 memory map, showing how a 4 GB address space is divided into data, program, private bus, and peripheral regions, with external RAM and drivers.

Explore the bit-band region feature of Cortex-M3, learn how bit-level access is achieved by aliasing bits to words, and see how this mapping enables targeted bit manipulation.

Learn how little endian and big endian architectures determine how data is stored and interpreted in ARM Cortex M3 and M4 processors, highlighting memory layout and value representation.

Explore the arm cortex m3 and m4 instruction set architecture and major instruction types, including data transfer, memory access, arithmetic, logic, shift, conversion, flow control, multiply-accumulate, floating point not covered.

Explore how data moves inside the ARM processor using move instructions, covering register-to-register transfers, immediate values, and the role of flags and encoding rules for 16-bit immediates.

Explore memory access with load and store instructions, detailing indexing modes, base register plus offset, and immediate and register offsets in pre- and post-indexing.

Explore how to load and store multiple words in ARM Cortex M3 and M4 processors, using base address addressing, increment and decrement addressing, and sequential memory access.

Explore addition in the ARM Cortex-M3 and M4 by showing how to specify operands with registers or immediate constants, using 16- and 32-bit instructions, and how destination and status flags update.

Explore subtraction instructions in the ARM Cortex M3 and M4, using immediate constants or register operands, with 16-bit and 32-bit encodings, and borrow concepts.

Explore multiplication and division instructions in the ARM Cortex M3 and M4, detailing unsigned and signed forms, register usage, and how execution yields the result.

Explore the multiply and accumulate MAC instruction in ARM Cortex M3 and M4, and learn how signals are multiplied by factors and accumulated to form discrete sequences.

Explore how logical instructions perform operations such as and, not, or on 16-bit values, including immediate operands and complements, to control processor behavior.

Explore the arm instruction set shift and rotate operations, including logical shifts and rotate right, and how bit wrapping and carry flag updates occur.

This lecture explains data conversion instructions, focusing on signed and unsigned extension, and how 16-bit values are extended to larger widths in ARM Cortex M3 and M4 processors.

Explore reverse byte instructions in data conversion: Rev, Rev Edge, and Rev16 reorder bytes within words and halves, explain how to extend results and distinguish data transformations.

Write a simple assembly program for ARM to add two 16-bit numbers, reinforcing basic 16-bit data handling and key instructions.

Explore bit field processing with BFC and RBIT on ARM Cortex M3 and M4 processors, learning how to clear bit fields, compute ranges, and reverse bit orders with in-place techniques.

Explore how compare and test instructions in the ARM Cortex M3 and M4 update only condition flags, zero and negative, to indicate equal, greater, or less, without storing a result.

Explore program flow control with branch instructions, including unconditional and conditional branching, branch and link, and the use of the link register to return to the main program.