pThe book introduces basic programming of ARM Cortex-M cores in assembly and C at the register level, and the fundamentals of embedded system design. It presents basic concepts such as data representations integer, fixed-point, floating-point, assembly instructions, stack, and implementing basic controls and functions of C language at the assembly level. It covers advanced topics such as interrupts, mixing C and assembly, direct memory access DMA, system timers SysTick, multi-tasking, SIMD instructions for digital signal processing DSP, and instruction encodingdecoding. The book also gives detailed examples of interfacing peripherals, such as general purpose IO GPIO, LCD driver, keypad interaction, stepper motor control, PWM output, timer input capture, DAC, ADC, real-time clock RTC, and serial communication USART, Isup2supC, SPI, and USB.p