sudo apt-get install gcc-arm-none-eabi  
sudo apt-get install gcc  
Switch to ports/stm32 directory and open terminal
make BOARD=F103  
- pyb.freq()
 - switch
 - timer
 - timer pwm
 - led
 - rtc
 - dac
 - adc
 - extint
 - pin
 - uart
 - spi
 - i2c
 - sdcard
 - usb MSC
 - usb cdc (Need open the DTR)
 
- CAN
 
- Some peripherals will have problems using DMA
 - i2c will restart when using dma
 

