This repository contains my libraries to use STM32F103C8T6 peripherals. It is written in C and uses Eclipse OpenOCD STLink-V2 to debug the bluepill board. It depends on stdPeriph libraries.

• STM32F103C8T6 microcontroller (ARM Cortex-M3)
• 72MHz
• Flash: 64/128 KB
• SRAM: 20 KB
• 3 x General purpose 1 x Advanced control timers
• 2 x SPI
• 2 x I2C
• 3 x USART
• 1 x USB
• 1 x CAN
• 37 x GPIO
• 2 x ADC / 10 channels (12 bits)
• LQFP48 / UFQFPN48 package
• Little endian LSB first

Clock domains for each peripheral:

DMA channels for each peripheral:

Project > Properties > C/C   General > Path and Symbols > Includes > GNU C  

Project > Properties > C/C   General > Path and Symbols > Source Location

Debug Configurations > GDB OpenOCD Debbuging > Debugger > Config Options:

-f /usr/share/openocd/scripts/board/bluepill.cfg
-f interface/stlink-v2.cfg 

• Baud rate = 9600 (user defined)
• Data bit = 8
• Stop bits = 1
• Parity = None
• Flow control = None

sudo putty /dev/ttyUSB0 -serial -sercfg 9600,8,n,1,N

• clock.h
• rtc.h
• timer.h
• uart.h
• adc.h

Clock sources (SYSCLK): - HSI Oscillator Clock - HSE Oscillator Clock - PLL Clock Secondary clock sources? - LSI RC (40kHz) - LSE crystal (32.768kHz)

• AHB and APB2 operates at full speeed (72MHz)
• APB1 is limited to 36MHz

• Current function only sets to 72MHz

Clock sources (RTCCLK):

- HSE/128 (62.5KHz)
- LSE clock (32.768kHz)
- LSI clock (40KHz)

• Current functions supports LSE as source
• Wrong time zone configuration

Low power modes: * Sleep * Standby * Stop

• Advanced control timers (TIM1 and TIM8)
  • 16 bit auto-reload counter
• General-purpose timers (TIM2 to TIM5)

• 12 bits
• Up to 18 multiplexed channels (16 external, 2 internal sources)
• Data alignment (ADC->CR2 |= ALIGN)
• The ADC input clock is synchonous with APB2 clock and it must not exceed 14MHz
• Regular (up to 16 conversions) or injected (up to 4 conversions) groups
• Single (CONT = 0) or continuous (CONT = 1) conversion mode
• Calibration (ADC->CR2 |= CAL)

• Clock configuration
  • Configure other clock speeds
  • Modify while HSE RDY
• RTC: Wrong time zone configuration
• Modify Delay for TIMx (instead of only TIM4)
• Add ADCx channels (only working for channels 0 and 6)
• Error Handling (enum Error_Type inside each class)
• Rewrite SD library

• STM32F103xx datasheet

• STM32F103xx reference manual (RM0008)

• Description of STM32F2xx Standard Peripheral LIbrary

• Eddie Amaya's youtube channel (great explanation for beginners!)

• Interfacing an SD Card