/**
 * @file        readme.txt
 *
 * @brief       This file is routine instruction
 *
 * @version     V1.0.0
 *
 * @date        2023-07-31
 *
 * @attention
 *
 *  Copyright (C) 2023 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

The program aims to show how to use interrupt to get camera image data by using DCI, in this case,
DCI continuously get the data of the OV2640 camera through DMA and sends it to the host by USART1.
Verification will occur after transmission, each time a complete frame is received , LED2 will be toggle.

notes:
The jpeg image can be decoded by the host computer.
And need to prepare an OV2640 module before start all this.

&par Hardware Description

  - USART1_TX(PA9) ----> host_RX
  - USART1_RX(PA10)----> host_TX

  - USART1 configured as follow:
  - BaudRate = 460800
  - Word Length = USART_WordLength_8b
  - Stop Bit = USART_StopBits_1
  - Parity = USART_Parity_No
  - Hardware flow control disabled (RTS and CTS signals)
  - Receive and transmit enabled

  - SCCB_SCL(PB8)     ----> OV2640_SCCB_SCL
  - SCCB_SDA(PB9)     ----> OV2640_SCCB_SDA
  - OV2640_PWDN(PA0)  ----> OV2640_PWDN
  - OV2640_RST(PF13)  ----> OV2640_RESET
  - DCI_HSYNC(PA4)    ----> OV2640_HREF
  - DCI_PCLK(PA6)     ----> OV2640_PCLK
  - DCI_VSYNC(PB7)    ----> OV2640_VSYNC
  - DCI_D0(PC6)       ----> OV2640_Y0
  - DCI_D1(PC7)       ----> OV2640_Y1
  - DCI_D2(PC8)       ----> OV2640_Y2
  - DCI_D3(PC9)       ----> OV2640_Y3
  - DCI_D4(PE4)       ----> OV2640_Y4
  - DCI_D5(PB6)       ----> OV2640_Y5
  - DCI_D6(PE5)       ----> OV2640_Y6
  - DCI_D7(PE6)       ----> OV2640_Y7

&par Directory contents

  - DCI/DCI_OV2640_JPEG/Source/main.c                  Main program
  - DCI/DCI_OV2640_JPEG/Source/apm32f4xx_int.c         Interrupt handlers

&par IDE environment

  - MDK-ARM V5.36
  - EWARM V8.50.5.26295
  - ECLIPSE-EMB V4.24.0

&par Hardware and Software environment

  - This example runs on APM32F407 MINI Devices.
