Release Notes for STM32F4xx CMSIS

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# Release Notes for STM32F4xx CMSIS

Copyright 2015 STMicroelectronics

## Update History

### V2.3.1 / 03-April-2015

Main Changes

- Header file for all STM32 devices

  - Update SRAM2, SRAM3 and BKPSRAM Bit-Banding base address defined values
  - Keep reference to SRAM3 only for STM32F42xx and STM32F43xx devices
  - Remove CCMDATARAM_BB_BASE: the CCM Data RAM region is not accessible via Bit-Banding
  - Update the RTC_PRER_PREDIV_S defined value to 0x00007FFF instead of 0x00001FFF

### V2.3.0 / 02-March-2015

Main Changes

- Add support of STM32F446xx devices

- Add "stm32f446xx.h" file

- Add startup file "startup_stm32f446xx.s" for EWARM, MDK-ARM and TrueSTUDIO toolchains

- Add Linker files "stm32f446xx_flash.icf" and "stm32f446xx_sram.icf" used within EWARM Workspaces

- Header file for all STM32 devices

  - Add missing bits definition in the EXTI IMR, EMR, RTSR, FTSR, SWIER and PR registers
  - Update RCC_AHB1RSTR_OTGHRST bit definition
  - Update PWR_CR_VOS bits definition for STM32F40xx and STM32F41xx devices

  - update SAI_xCR1_MCKDIV bit definition

### V2.2.0 / 15-December-2014

Main Changes

- stm32f4xx.h

  - Add new constant definition STM32F4

- system_stm32f4xx.c

  - Fix SDRAM configuration in SystemInit_ExtMemCtl(): change RowBitsNumber from 11 to 12 (for MT48LC4M32B2 available on STM324x9I_EVAL board)

- Header file for all STM32 devices

  - Add missing bits definition for CAN, FMC and USB peripherals

  - GPIO_TypeDef: change the BSRR register definition, the two 16-bits definition BSRRH and BSRRL are merged in a single 32-bits definition BSRR

### V2.1.0 / 19-June-2014

Main Changes

- Add support of STM32F411xExx devices

- Add "stm32f411xe.h" file

- Add startup file "startup_stm32f411xx.s" for EWARM, MDK-ARM and TrueSTUDIO toolchains

- All header files

- Add missing defines for GPIO LCKR Register

- Add defines for memories base and end addresses: FLASH, SRAM, BKPSRAM and CCMRAM.

- Add the following aliases for IRQ number and handler definition to ensure compatibility across the product lines of STM32F4 Series;

- example for STM32F405xx.h

#define FMC_IRQn FSMC_IRQn
#define FMC_IRQHandler FSMC_IRQHandler

- and for STM32F427xx.h

#define FSMC_IRQn FMC_IRQn
#define FSMC_IRQHandler FMC_IRQHandler

- "stm32f401xc.h" and "stm32f401xe.h": update to be in line with latest version of the Reference manual

- Remove RNG registers structures and the corresponding bit definitions
- Remove any occurrence to RNG (clock enable, clock reset,…)
- Add the following bit definition for PWR CR register

- #define PWR_CR_ADCDC1 ((uint32_t)0x00002000)

- #define PWR_CR_LPLVDS ((uint32_t)0x00000400)

- #define PWR_CR_MRLVDS ((uint32_t)0x00000800)

- "stm32f427xx.h", "stm32f437xx.h", "stm32f429xx.h" and "stm32f439xx.h"

- Add a new legacy bit definition for PWR to be in line with latest version of the Reference manual

- #define PWR_CR_LPUDS PWR_CR_LPLVDS

- #define PWR_CR_MRUDS PWR_CR_MRLVDS

- Update startup files for EWARM toolchain to cope with compiler enhancement of the V7.10 version

- system_stm32f4xx.c

- Remove dependency vs. the HAL, to allow using this file without the need to have the HAL drivers

- Include stm32f4xx.h instead of stm32f4xx_hal.h
- Add definition of HSE_VALUE and HSI_VALUE, if they are not yet defined in the compilation scope (these values are defined in stm32f4xx_hal_conf).

- Use “__IO const” instead of “__I”, to avoid any compilation issue when __cplusplus switch is defined

### V2.0.0 / 18-February-2014

Main Changes

- Update based on STM32Cube specification
- This version and later has to be used only with STM32CubeF4 based development

### V1.3.0 / 08-November-2013

Main Changes

- Add support of STM32F401xExx devices

- Update startup files "startup_stm32f401xx.s" for EWARM, MDK-ARM, TrueSTUDIO and Ride toolchains: Add SPI4 interrupt handler entry in the vector table

### V1.2.1 / 19-September-2013

Main Changes

- system_stm32f4xx.c : Update FMC SDRAM configuration (RBURST mode activation)

- Update startup files "startup_stm32f427_437xx.s" and "startup_stm32f429_439xx.s" for TrueSTUDIO and Ride toolchains and maintain the old name of startup files for legacy purpose

### V1.2.0 / 11-September-2013

Main Changes

- Add support of STM32F429/439xx and STM32F401xCxx devices

- Update definition of STM32F427/437xx devices : extension of the features to include system clock up to 180MHz, dual bank Flash, reduced STOP Mode current, SAI, PCROP, SDRAM and DMA2D
- stm32f4xx.h
  - Add the following device defines :
  - "#define STM32F40_41xxx" for all STM32405/415/407/417xx devices
  - "#define STM32F427_437xx" for all STM32F427/437xx devices
  - "#define STM32F429_439xx" for all STM32F429/439xx devices
  - "#define STM32F401xx" for all STM32F401xx devices
  - Maintain the old device define for legacy purpose
  - Update IRQ handler enumeration structure to support all STM32F4xx Family devices.
- Add new startup files "startup_stm32f40_41xxx.s","startup_stm32f427_437xx.s", "startup_stm32f429_439xx.s" and "startup_stm32f401xx.s" for all toolchains and maintain the old name for startup files for legacy purpose
- system_stm32f4xx.c
  - Update the system configuration to support all STM32F4xx Family devices.

### V1.1.0 / 11-January-2013

Main Changes

- Official release for STM32F427x/437x devices.
- stm32f4xx.h
  - Update product define: replace "#define STM32F4XX" by "#define STM32F40XX" for STM32F40x/41x devices
  - Add new product define: "#define STM32F427X" for STM32F427x/437x devices.
- Add new startup files "startup_stm32f427x.s" for all toolchains
- rename startup files "startup_stm32f4xx.s" by "startup_stm32f40xx.s" for all toolchains
- system_stm32f4xx.c
  - Prefetch Buffer enabled
  - Add reference to STM32F427x/437x devices and STM324x7I_EVAL board
  - SystemInit_ExtMemCtl() function
    - Add configuration of missing FSMC address and data lines
    - Change memory type to SRAM instead of PSRAM (PSRAM is available only on STM324xG-EVAL RevA) and update timing values

### V1.0.2 / 05-March-2012

Main Changes

- All source files: license disclaimer text update and add link to the License file on ST Internet.

### V1.0.1 / 28-December-2011

Main Changes

- All source files: update disclaimer to add reference to the new license agreement
- stm32f4xx.h

- Correct bit definition: RCC_AHB2RSTR_HSAHRST changed to RCC_AHB2RSTR_HASHRST

### V1.0.0 / 30-September-2011

Main Changes

- First official release for STM32F40x/41x devices
- Add startup file for TASKING toolchain
- system_stm32f4xx.c: driver's comments update

### V1.0.0RC2 / 26-September-2011

Main Changes

- Official version (V1.0.0) Release Candidate2 for STM32F40x/41x devices
- stm32f4xx.h

- Add define for Cortex-M4 revision __CM4_REV
- Correct RCC_CFGR_PPRE2_DIV16 bit (in RCC_CFGR register) value to 0x0000E000
- Correct some bits definition to be in line with naming used in the Reference Manual (RM0090)

- GPIO_OTYPER_IDR_x changed to GPIO_IDR_IDR_x
- GPIO_OTYPER_ODR_x changed to GPIO_ODR_ODR_x
- SYSCFG_PMC_MII_RMII changed to SYSCFG_PMC_MII_RMII_SEL
- RCC_APB2RSTR_SPI1 changed to RCC_APB2RSTR_SPI1RST
- DBGMCU_APB1_FZ_DBG_IWDEG_STOP changed to DBGMCU_APB1_FZ_DBG_IWDG_STOP
- PWR_CR_PMODE changed to PWR_CR_VOS
- PWR_CSR_REGRDY changed to PWR_CSR_VOSRDY
- Add new define RCC_AHB1ENR_CCMDATARAMEN
- Add new defines SRAM2_BASE, CCMDATARAM_BASE and BKPSRAM_BASE

- GPIO_TypeDef structure: in the comment change AFR[2] address mapping to 0x20-0x24 instead of 0x24-0x28

- system_stm32f4xx.c

- SystemInit(): add code to enable the FPU
- SetSysClock(): change PWR_CR_PMODE by PWR_CR_VOS
- SystemInit_ExtMemCtl(): remove commented values

- startup (for all compilers)

- Delete code used to enable the FPU (moved to system_stm32f4xx.c file)
- File’s header updated

### V1.0.0RC1 / 25-August-2011

Main Changes

- Official version (V1.0.0) Release Candidate1 for STM32F4xx devices

## License

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1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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from this software without specific prior written permission.
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For complete documentation on STM32 Microcontrollers visit www.st.com/STM32