libopencm3
A free/libre/open-source firmware library for various ARM Cortex-M3 microcontrollers.
STM32F1
Here is a list of all modules:
[detail level 1234]
 CM3 DefinesDefined Constants and Types for Cortex M3 core features
 SysTick Defineslibopencm3 Defined Constants and Types for the Cortex SysTick
 Cortex-M System Control Block
 Cortex-M System Control SpaceThe System Control Space (SCS) is a memory-mapped 4KB address space that provides 32-bit registers for configuration, status reporting and control
 Cortex Core Defineslibopencm3 Defined Constants and Types for the Cortex Core
 DebuggingMacros and functions to aid in debugging
 MPU Defineslibopencm3 Cortex Memory Protection Unit
 Cortex-M Flash Patch and Breakpoint (FPB) unit
 NVIC Defineslibopencm3 Cortex Nested Vectored Interrupt Controller
 Cortex-M Trace Port Interface Unit (TPIU)
 Cortex-M Instrumentation Trace Macrocell (ITM)
 Peripheral APIsAPIs for device peripherals
 ADC peripheral API
 CRC peripheral API
 I2C peripheral API
 IWDG peripheral API
 SPI peripheral API
 USART peripheral API
 STM32F1xxLibraries for ST Microelectronics STM32F1xx series
 FLASHlibopencm3 STM32F1xx FLASH Memory
 GPIOlibopencm3 STM32F1xx General Purpose I/O
 RCClibopencm3 STM32F1xx Reset and Clock Control
 RTClibopencm3 STM32F1xx RTC
 Timerslibopencm3 STM32F1xx Timers
 STM32F1xx DefinesDefined Constants and Types for the STM32F1xx series
 RTC DefinesDefined Constants and Types for the STM32F1xx Real Time Clock
 CRC Defineslibopencm3 Defined Constants and Types for the STM32F1xx CRC Generator
 DMA DefinesDefined Constants and Types for the STM32F1xx DMA Controller
 SPI DefinesDefined Constants and Types for the STM32F1xx SPI
 RCC DefinesDefined Constants and Types for the STM32F1xx Reset and Clock Control
 BKP DefinesDefined Constants and Types for the Backup Registers
 USART DefinesDefined Constants and Types for the STM32F1xx USART
 PWR DefinesDefined Constants and Types for the STM32F1xx PWR Control
 FLASH DefinesDefined Constants and Types for the STM32F1xx FLASH Memory
 IWDG DefinesDefined Constants and Types for the STM32F1xx Independent Watchdog Timer
 EXTI DefinesDefined Constants and Types for the STM32F1xx External Interrupts
 DAC DefinesDefined Constants and Types for the STM32F1xx DAC
 ADC DefinesDefined Constants and Types for the STM32F1xx Analog to Digital Converters
 Timer Defineslibopencm3 Defined Constants and Types for the STM32F1xx Timers
 I2C DefinesDefined Constants and Types for the STM32F1xx I2C
 GPIO DefinesDefined Constants and Types for the STM32F1xx General Purpose I/O
 User interrupt service routines (ISR) prototypes for STM32 F1 series
 MAC Generic DefinesDefined Constants and Types for the Ethernet MAC
 MAC STM32Fxx7 DefinesDefined Constants and Types for the Ethernet MAC for STM32Fxx7 chips
 PHY Generic DefinesDefined Constants and Types for the Ethernet PHY
 PHY KSZ80X1 DefinesDefined Constants and Types for the Ethernet PHY KSZ80X1 chips chips
 CAN defineslibopencm3 Defined Constants and Types for STM32 CAN
 CAN register base address
 USB DefinesDefined Constants and Types for the STM32F* USB drivers
 USB MSC Type DefinitionsDefined Constants and Types for the USB MSC Type Definitions
 USB DriversDefined Constants and Types for the USB Drivers
 USB Standard Structure DefinitionsDefined Constants and Types for the USB Standard Structure Definitions
 CANlibopencm3 STM32Fxxx CAN
 User interrupt service routines (ISR) defaults for STM32 F1 series
 NVIClibopencm3 Cortex Nested Vectored Interrupt Controller
 SysTicklibopencm3 Cortex System Tick Timer
 MAC Generic DriversEthernet MAC Generic Drivers
 MAC STM32Fxx7Ethernet MAC STM32Fxx7 Drivers
 PHY Generic DriversEthernet PHY Generic Drivers
 PHY KSZ8051MLLEthernet PHY STM32Fxx7 Drivers
 Generic USB DriversGeneric USB Drivers
 Generic USB Control RequestsGeneric USB Control Requests
 Generic USB Standard Request InterfaceGeneric USB Standard Request Interface
 Dac_file
 Dma_file
 Pwr_file
 Usb_msc