Programming STM32F103C8T6 using Keil

Programming Basic Peripherals of STM32F103C8T6 using Keil 
STM32F103C8T6 falls under medium density ARM-Cortex M3 based microcontroller with on chip RAM of 20KB and Flash of 64KB, with decent number of on chip peripherals, Here i will show how this controller can be programmed using keil.
In my earlier post I covered how to add Secondary bootloader to STM32F103C8T6 you can find it from here.

In this post i will show how to program GPIO of STM32F103C8T6.
On board LED is connected to Port C -13pin. Basic things required for programming are
1. Keil IDE - Download
2. Common Files - Download
3. Manuals - Hardware -  Download
                     Peripherals- Download

Just create one folder and extract common files in to that folder and open keil and create project
in that folder with out any extension give some name say led
Select Project->New Project->led.uvproj->STM32F103C8
allow startup file to be added to project
Right click on source group and add System_Stm32f10x.c
and create one app.c and add it to source group

In app.c just include stm32f10x.h
write main function
Steps to Program GPIO
1) Power on GPIO by enabling Power to Port-c by setting bit 4 of APB2ENR register
this is part  Reset  and Clock Control (RCC) structure

2) Default Function of Port-C 13 pin is GPIO (from Hardware manual you can get this information)

3) Configure relevant registers of GPIO
Set Direction of GPIO as output  push pull mode
by writing 1 to 21st bit of CRH register

4) then turn Port-C.13 pin on and off by writing in to BSRR and BRR register 13th bit with software delay in between

Select target options and click C/C++ and under define type  STM32F10X_MD

Then click on Save and Rebuild It should give zero errors and zero warnings

click on debug and select peripherals-> GPIO C and click on run

After connecting STM32F103C8T6  board through USB you should see following class of USB DFU

Do small settings in program.
first under target change start to 0x8003000

then under linker check select from target options

in System_stm32f10x.c change Vector Table Offset to 0x3000

in app.c add SystemInit() and increase delay

output generate hex and using dfu manager convert hex to dfu file

then upload dfu in to hard ware using dfuse software

after uploading press reset.led should toggle for 1sec

for interfacing lcd to stm32f103c8t6 click here