The appropriate constants are defined in stm32f10x_rcc.h; the constant
names, shown in Table 4.1, are relatively self-explanatory and correspond
to the device names utilized in the various STM32 reference manuals
([20, 21]), limited to those that are present in the STM32 MCU on the discovery
board. It is a testament to the STM32 family design that the same
constants and core library applies across a broad family of devices. (Note the
stm32f2xx and stm32f4xx components have different, although similar standard
peripheral libraries)