Release Notes for STM32F4-Discovery Board Drivers

# Release Notes for

# STM32F4-Discovery Board Drivers

Copyright © 2017 STMicroelectronics

# Purpose

This directory contains the board drivers to demonstrate the capabilities of the STM32F4-Discovery Board Drivers.

# Update History

V2.1.5 / 22-September-2023

## Main Changes

- Update Release_Notes.html to support new format

V2.1.4 / 11-Fabruary-2022

## Main Changes

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

V2.1.3 / 21-September-2017

## Main Changes

- Remove date & version
- Add general description of BSP drivers
- stm32f4_discovery_audio.c/.h:
  - Aligned with PDM library v3.0.0
- Note
  - This version must be used with v3.0.0 of PDM library

V2.1.2 / 27-January-2017

## Main Changes

- Replace __PPP_CLK_ENABLE/DISABLE with __HAL_RCC_PPP_ENABLE/DISABLE
- Add BSP_AUDIO_OUT_ClockConfig, BSP_AUDIO_OUT_MspInit and BSP_AUDIO_OUT_MspDeInit as weak functions
- Add BSP_AUDIO_IN_ClockConfig, BSP_AUDIO_IN_MspInit and BSP_AUDIO_IN_MspDeInit as weak functions

V2.1.1 / 12-January-2016

## Main Changes

- General updates to fix doxygen errors
- Add STM32F4-Discovery_BSP_User_Manual.chm file

V2.1.0 / 14-August-2015

## Main Changes

- stm32f4_discovery.c
  - Add AUDIO_IO_DeInit() function to align with BSP Components Common drivers V4.0.0

V2.0.4 / 02-March-2015

## Main Changes

- stm32f4_discovery.c/.h
  - Align to STM32F4xx HAL Driver V1.3.0 for __HAL_RCC_PPP_CLK_ENABLE()

V2.0.3 / 10-December-2014

## Main Changes

- stm32f4_discovery_accelerometer.h
  - Change “" by”/" in the include path to fix compilation issue under Linux
- stm32f4_discovery_audio.c/.h
  - BSP_AUDIO_OUT_Init(): Fix limitation on the I2S clock configuration
  - Change “" by”/" in the include path to fix compilation issue under Linux
- stm32f4_discovery.c/.h
  - Change I2C_SPEED used define by BSP_I2C_SPEED
- Miscellaneous comments update

V2.0.2 / 26-June-2014

## Main Changes

- stm32f4_discovery_audio.c/.h
  - BSP_AUDIO_OUT_Play(): uses the buffer size in byte instead of half-word
  - BSP_AUDIO_IN_PDMToPCM(): duplicates samples to make stereo audio stream (since a single microphone in mounted on STM32F4-Discovery)
  - I2S2_Init(): configures the I2S to clock the microphone at 1.024 MHz as required instead of 2.048MHz

V2.0.1 / 19-June-2014

## Main Changes

- stm32f4_discovery_audio.c/.h
  - Enhance BSP_PB_Init() function by removing the call of __SYSCFG_CLK_ENABLE() already enabled in the HAL_GPIO_Init()
- stm32f4_discovery_audio.c/.h
  - Add note that only the audio stereo format is supported
- Comments clean up and typo corrections

V2.0.0 / 18-Fabruary-2014

## Main Changes

- Major update based on STM32Cube specification: drivers architecture and APIs modified vs. V1.1.2, and thus the 2 versions are not compatible.
- This version has to be used only with STM32CubeF4 based development

V1.1.2 / 17-April-2012

## Main Changes

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

V1.1.1 / 30-December-2011

## Main Changes

- PDM Library moved from Utilities32F4-Discovery to Utilities32_Audiofolder
- All source files: update disclaimer to add reference to the new license agreement
- stm32f4_discovery_audio_codec.c
  - Audio_MAL_Init() function: DMA configuration changed as below
    - DMA_FIFOMode_Disable changed to DMA_FIFOMode_Enable
    - DMA_FIFOThreshold_1QuarterFull changed to DMA_FIFOThreshold_HalfFull

V1.1.0 / 28-October-2011

## Main Changes

- Add PDM audio software decoding Library drivers, used to decode and reconstruct the audio signal produced by MP45DT02 MEMS microphone from STMicroelectronics. For more details about this Library, please refer to document “PDM audio software decoding on STM32 microcontrollers (AN3998)”.
- stm32f4_discovery_audio_codec.c/.h: update to use DMA instead of Interrupt in I2S communication with the external codec.

V1.0.0 / 19-September-2011

## Main Changes

- First official version of the STM32F4-Discovery Board Drivers