[M487] Record AMR File to MicroSD Card

[chhsieh3]

• Application: This example code uses the M487 microcontroller and external audio codec NAU88L25 to record sound in AMR format into a MicroSD card.
• BSP Version: M480_BSP_CMSIS_V3.05.003
• Hardware: NuMaker-PFM-M487 V3.0

This example code uses external audio codec NAU88L25 to record sound from headphone mic, encode it by an AMR codec library, and store it in a MicroSD card. The default file name “rec.amr” is located at a root directory of MicroSD card.

The recorder AMR file supports mono mode. The data length is 16 bits and sampling rate is 8 kHz.

You can download the sample code at https://www.nuvoton.com/resource-downlo ... 0429114324