Awesome

STM8S208-CAN-Speed-Calculator

Russian description availavble here: http://idoka.ru/canbus-on-stm8s-discovery-with-stm8s208/

Just Change several parameters in main.cpp according your settings:

  f_mhz = 12; // CPU clock frequency in MHz
  sp_proc = 87.5; // SP value in percent
  sp_err = 5; // Possible error of SP  setting