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# Release Notes for STM32F4-Discovery Board Drivers Copyright 2011 STMicroelectronics
## Contents STM32F4-Discovery Board Drivers update History License ## STM32F4-Discovery Board Drivers update History For more information on the STM32F4-Discovery board visit www.st.com/stm32f4-discovery. ### 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 ## License The use of the PDM audio software decoding Library is governed by the terms and conditions of the License Agreement "MCD-ST Image SW License Agreement 19Jul2011 v0.1.pdf" available in the root of this folder. The use of the other STM32F4-Discovery board drivers is governed by the terms and conditions of the License Agreement "MCD-ST Liberty SW License Agreement 20Jul2011 v0.1.pdf" available in the root of this package. For complete documentation on STMicroelectronics Microcontrollers visit www.st.com