STM32F407驱动ov2640摄像头采集图像，通过esp8266（串口协议）上传服务器显示, 和通过简单串口发送到上位机显示的示例代码

以下是基于STM32F407驱动OV2640摄像头采集图像并通过ESP8266上传服务器显示的示例代码：

#include "stm32f4xx.h"
#include "stm32f4xx_conf.h"
#include "ov2640.h"
#include "esp8266.h"
#include <string.h>

#define OV2640_ADDR         0x60
#define ESP8266_UART        USART3

uint8_t ov2640_buffer[OV2640_BUFFER_SIZE];
uint8_t esp8266_buffer[ESP8266_BUFFER_SIZE];

void OV2640_Init(void)
{
    OV2640_HW_Init();
    OV2640_InitRegisters();
    OV2640_SetRegisters();

    OV2640_SetupImageFormat(OV2640_JPEG_MODE);
    OV2640_SetupImageSize(OV2640_640x480);
}

void ESP8266_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_USART3);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_USART3);

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_Init(ESP8266_UART, &USART_InitStructure);

    USART_Cmd(ESP8266_UART, ENABLE);
}

void ESP8266_SendImage(uint8_t* buffer, uint32_t size)
{
    ESP8266_SendCommand("AT+CIPSTART=\"TCP\",\"SERVER_IP\",SERVER_PORT\r\n");

    while (ESP8266_WaitForResponse(esp8266_buffer, "OK", 1000) == 0);

    char* header = "POST /upload HTTP/1.1\r\n"
                   "Host: SERVER_IP:SERVER_PORT\r\n"
                   "Content-Type: image/jpeg\r\n"
                   "Content-Length: %d\r\n"
                   "\r\n";

    char header_buffer[128];
    sprintf(header_buffer, header, size);

    USART_SendData(ESP8266_UART, (uint16_t)'\r');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'\n');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);

    USART_SendData(ESP8266_UART, (uint16_t)'A');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'T');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'+');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'C');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'I');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'P');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'S');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'E');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'N');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'D');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'=');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'"');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'T');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'C');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'P');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'"');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'\r');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'\n');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);

    USART_SendData(ESP8266_UART, (uint16_t)'C');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'O');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'N');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'T');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'E');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'N');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'T');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'-');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'L');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'E');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'N');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'G');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'T');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)'H');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    USART_SendData(ESP8266_UART, (uint16_t)':');
    while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);

    for (int i = 0; i < strlen(header_buffer); i++)
    {
        USART_SendData(ESP8266_UART, (uint16_t)header_buffer[i]);
        while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    }

    for (int i = 0; i < size; i++)
    {
        USART_SendData(ESP8266_UART, (uint16_t)buffer[i]);
        while (USART_GetFlagStatus(ESP8266_UART, USART_FLAG_TXE) == RESET);
    }

    ESP8266_SendCommand("AT+CIPCLOSE\r\n");
}

int main(void)
{
    OV2640_Init();
    ESP8266_Init();

    while (1)
    {
        OV2640_ReadImage(ov2640_buffer);

        ESP8266_SendImage(ov2640_buffer, OV2640_BUFFER_SIZE);
    }
}

在上述代码中，需要将 `SERVER_IP` 和 `SERVER_PORT` 替换为目标服务器的 IP 地址和端口号。

以下是通过简单串口发送到上位机显示的示例代码：

#include "stm32f4xx.h"
#include "stm32f4xx_conf.h"
#include "ov2640.h"
#include <stdlib.h>
#include <stdio.h>

#define OV2640_ADDR         0x60

uint8_t ov2640_buffer[OV2640_BUFFER_SIZE];

void OV2640_Init(void)
{
    OV2640_HW_Init();
    OV2640_InitRegisters();
    OV2640_SetRegisters();

    OV2640_SetupImageFormat(OV2640_JPEG_MODE);
    OV2640_SetupImageSize(OV2640_640x480);
}

int main(void)
{
    OV2640_Init();

    while (1)
    {
        OV2640_ReadImage(ov2640_buffer);

        printf("Image size: %dx%d\r\n", OV2640_IMAGE_WIDTH, OV2640_IMAGE_HEIGHT);
        printf("JPEG size: %d bytes\r\n", OV2640_BUFFER_SIZE);
        printf("Press any key to continue...\r\n");

        getchar();
    }
}

在上述代码中，使用 `printf()` 函数将 JPEG 图像大小和分辨率输出到串口。需要注意的是，在使用 `printf()` 函数前需要先初始化串口。