making different pointer types to access peripheral registers. peripheral registers bit access with structures with bitfield and union

STM32f103 bare metal blink 4 methods

a. using SFRs view

b. make a pointer for each register

c. structure type for each peripheral

d. structures with bitfield and union

STM32 register based programming – 2 : new CMSIS device files with bitfield and union with SVDConv

a. STM32F103 led blink with standard CMSIS device header file

b. Creating new CMSIS device files with bitfield and union with SVDConv.exe

c. Adding new CMSIS device file to project and modifying it

d. STM32F103 led blink with modified device file, direct bit access in c language