/*!
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.0
 *
 * @date        2025-02-15
 *
 * @attention
 *
 *  Copyright (C) 2025 Geehy Semiconductor
 *
 *  You may not use this file except in compliance with the
 *  GEEHY COPYRIGHT NOTICE (GEEHY SOFTWARE PACKAGE LICENSE).
 *
 *  The program is only for reference, which is distributed in the hope
 *  that it will be useful and instructional for customers to develop
 *  their software. Unless required by applicable law or agreed to in
 *  writing, the program is distributed on an "AS IS" BASIS, WITHOUT
 *  ANY WARRANTY OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the GEEHY SOFTWARE PACKAGE LICENSE for the governing permissions
 *  and limitations under the License.
 */

&par Example Description

This example describes how to use I2S peripheral.
by making a communication between the I2S2 and the I2S3.
If communication success, LED2  will turn on.
"Transfer OK!" will be shown on serial assistant trough usart1.
if fail，LED2 will turn off,
"Transfer Fail!" will be shown on serial assistant trough usart1.
LED3  blinking shows system is running.

The USART1 is configured as follows:
    - TX:PA9, RX:PA10
    - BaudRate = 115200 baud  
    - Word Length = 8 Bits
    - One Stop Bit
    - No parity
    - Hardware flow control disabled (RTS and CTS signals)
    - Receive and transmit enabled

&par Hardware Description

Connect I2S2 and I2S3 pins as follows:
I2S2 WS    (PB12)   to  I2S3 WS   (PA15)
I2S2 CK    (PB13)   to  I2S3 CK   (PB3)
I2S2 SD    (PB15)   to  I2S3 SD   (PB5)

Debug Port must be SWD.

&par Directory contents

  - I2S/I2S_Interrupt/Source/main.c                       Main program
  - I2S/I2S_Interrupt/Source/apm32f4xx_int.c        Interrupt handlers

&par IDE environment

  - MDK-ARM V5.40
  - EWARM V8.50.5.26295
  - Eclipse V2022-06（4.24.0）

&par Hardware and Software environment

  - This example runs on APM32F411 Tiny Devices.
