/********************************************************************************************************************* * TC264 Opensourec Library 即（TC264 开源库）是一个基于官方 SDK 接口的第三方开源库 * Copyright (c) 2022 SEEKFREE 逐飞科技 * * 本文件是 TC264 开源库的一部分 * * TC264 开源库 是免费软件 * 您可以根据自由软件基金会发布的 GPL（GNU General Public License，即 GNU通用公共许可证）的条款 * 即 GPL 的第3版（即 GPL3.0）或（您选择的）任何后来的版本，重新发布和/或修改它 * * 本开源库的发布是希望它能发挥作用，但并未对其作任何的保证 * 甚至没有隐含的适销性或适合特定用途的保证 * 更多细节请参见 GPL * * 您应该在收到本开源库的同时收到一份 GPL 的副本 * 如果没有，请参阅 * * 额外注明： * 本开源库使用 GPL3.0 开源许可证协议 以上许可申明为译文版本 * 许可申明英文版在 libraries/doc 文件夹下的 GPL3_permission_statement.txt 文件中 * 许可证副本在 libraries 文件夹下 即该文件夹下的 LICENSE 文件 * 欢迎各位使用并传播本程序 但修改内容时必须保留逐飞科技的版权声明（即本声明） * * 文件名称 zf_device_ov7725 * 公司名称 成都逐飞科技有限公司 * 版本信息 查看 libraries/doc 文件夹内 version 文件 版本说明 * 开发环境 ADS v1.10.2 * 适用平台 TC264D * 店铺链接 https://seekfree.taobao.com/ * * 修改记录 * 日期 作者 备注 * 2022-09-15 pudding first version ********************************************************************************************************************/ /********************************************************************************************************************* * 接线定义： * ------------------------------------ * 模块管脚 单片机管脚 * TXD/SCL 查看 zf_device_ov7725.h 中 OV7725_COF_UART_TX 或 OV7725_COF_IIC_SCL 宏定义 * RXD/SDA 查看 zf_device_ov7725.h 中 OV7725_COF_UART_RX 或 OV7725_COF_IIC_SDA 宏定义 * PCLK 查看 zf_device_ov7725.h 中 OV7725_PCLK_PIN 宏定义 * VSY 查看 zf_device_ov7725.h 中 OV7725_VSYNC_PIN 宏定义 * D0-D7 查看 zf_device_ov7725.h 中 OV7725_DATA_PIN 宏定义 从该定义开始的连续八个引脚 * VCC 3.3V电源 * GND 电源地 * 其余引脚悬空 * ------------------------------------ ********************************************************************************************************************/ #include "zf_common_interrupt.h" #include "zf_common_debug.h" #include "zf_common_fifo.h" #include "zf_driver_delay.h" #include "zf_driver_dma.h" #include "zf_driver_exti.h" #include "zf_driver_gpio.h" #include "zf_driver_soft_iic.h" #include "zf_driver_uart.h" #include "zf_device_camera.h" #include "zf_device_type.h" #include "zf_device_ov7725.h" vuint8 ov7725_finish_flag = 0; uint8 ov7725_image_binary [OV7725_H][OV7725_W / 8]; // 图像保存数组 uint8 ov7725_uart_dma_init_flag; // 重新初始化DMA的标志位 uint8 ov7725_dma_int_num = 0; uint8 ov7725_lost_flag = 1; uint8 ov7725_link_list_num = 0; // 需要配置到摄像头的数据 不允许在这修改参数 static uint16 ov7725_set_confing_buffer [OV7725_CONFIG_FINISH][2]= { {OV7725_INIT, 0}, // 初始化命令 {OV7725_RESERVE, 0}, // 保留 {OV7725_CONTRAST, OV7725_CONTRAST_DEF}, // 阈值设置 {OV7725_FPS, OV7725_FPS_DEF}, // 帧率 {OV7725_COL, OV7725_W}, // 图像宽度 {OV7725_ROW, OV7725_H} // 图像高度 }; // 从摄像头内部获取到的配置数据 不允许在这修改参数 static uint16 ov7725_get_confing_buffer [OV7725_CONFIG_FINISH - 1][2]= { {OV7725_RESERVE, 0}, // 保留 {OV7725_CONTRAST, 0}, // 阈值设置 {OV7725_FPS, 0}, // 帧率 {OV7725_COL, 0}, // 图像宽度 {OV7725_ROW, 0} // 图像高度 }; //------------------------------------------------------------------------------------------------------------------- // 函数简介 配置摄像头内部配置信息 // 参数说明 buff 发送配置信息的地址 // 返回参数 uint8 1-失败 0-成功 // 使用示例 if(ov7725_set_config(ov7725_set_confing_buffer)){} // 备注信息 内部调用 //------------------------------------------------------------------------------------------------------------------- static uint8 ov7725_set_config (uint16 buff[OV7725_CONFIG_FINISH][2]) { uint8 return_state = 1; uint8 uart_buffer[4]; uint16 temp = 0; uint16 timeout_count = 0; uint32 loop_count = 0; uint32 uart_buffer_index = 0; for(loop_count = OV7725_ROW; OV7725_SET_DATA > loop_count; loop_count --) { uart_buffer[0] = 0xA5; uart_buffer[1] = (uint8)buff[loop_count][0]; temp = buff[loop_count][1]; uart_buffer[2] = temp >> 8; uart_buffer[3] = (uint8)temp; uart_write_buffer(OV7725_COF_UART, uart_buffer, 4); system_delay_ms(10); } do { if(3 <= fifo_used(&camera_receiver_fifo)) { uart_buffer_index = 3; fifo_read_buffer(&camera_receiver_fifo, uart_buffer, &uart_buffer_index, FIFO_READ_AND_CLEAN); if((0xff == uart_buffer[1]) || (0xff == uart_buffer[2])) { return_state = 0; break; } } system_delay_ms(1); }while(OV7725_INIT_TIMEOUT > timeout_count ++); // 以上部分对摄像头配置的数据全部都会保存在摄像头上51单片机的eeprom中 // 利用set_exposure_time函数单独配置的曝光数据不存储在eeprom中 return return_state; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 获取摄像头内部配置信息 // 参数说明 buff 接收配置信息的地址 // 返回参数 uint8 1-失败 0-成功 // 使用示例 if(ov7725_get_config(ov7725_get_confing_buffer)){} // 备注信息 内部调用 //------------------------------------------------------------------------------------------------------------------- static uint8 ov7725_get_config (uint16 buff[OV7725_CONFIG_FINISH - 1][2]) { uint8 return_state = 0; uint8 uart_buffer[4]; uint16 temp = 0; uint16 timeout_count = 0; uint32 loop_count = 0; uint32 uart_buffer_index = 0; for(loop_count = OV7725_ROW - 1; 1 <= loop_count; loop_count --) { uart_buffer[0] = 0xA5; uart_buffer[1] = OV7725_GET_STATUS; temp = buff[loop_count][0]; uart_buffer[2] = temp >> 8; uart_buffer[3] = (uint8)temp; uart_write_buffer(OV7725_COF_UART, uart_buffer, 4); system_delay_ms(10); timeout_count = 0; do { if(3 <= fifo_used(&camera_receiver_fifo)) { uart_buffer_index = 3; fifo_read_buffer(&camera_receiver_fifo, uart_buffer, &uart_buffer_index, FIFO_READ_AND_CLEAN); buff[loop_count][1] = uart_buffer[1] << 8 | uart_buffer[2]; break; } system_delay_ms(1); }while(OV7725_INIT_TIMEOUT > timeout_count ++); if(OV7725_INIT_TIMEOUT < timeout_count) // 超时 { return_state = 1; break; } } return return_state; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 小钻风摄像头内部寄存器初始化 // 参数说明 void // 返回参数 uint8 1-失败 0-成功 // 使用示例 if(ov7725_iic_init()){} // 备注信息 内部使用 用户无需调用 //------------------------------------------------------------------------------------------------------------------- static uint8 ov7725_iic_init (void) { soft_iic_info_struct ov7725_iic_struct; uint8 ov7725_idcode = 0; uint8 return_state = 0; uart_rx_interrupt(OV7725_COF_UART, 0); soft_iic_init(&ov7725_iic_struct, OV7725_DEV_ADD, OV7725_COF_IIC_DELAY, OV7725_COF_IIC_SCL, OV7725_COF_IIC_SDA); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM7, 0x80); // 复位摄像头 system_delay_ms(50); do { ov7725_idcode = soft_iic_sccb_read_register(&ov7725_iic_struct, OV7725_VER); if(OV7725_ID != ov7725_idcode) { return_state = 1; // 校验摄像头ID号 break; } // ID号确认无误 然后配置寄存器 soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM4 , 0xC1); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_CLKRC , 0x01); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM2 , 0x03); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM3 , 0xD0); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM7 , 0x40); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_COM8 , 0xCE); // 0xCE:关闭自动曝光 0xCF：开启自动曝光 soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HSTART , 0x3F); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HSIZE , 0x50); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VSTRT , 0x03); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VSIZE , 0x78); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HREF , 0x00); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_SCAL0 , 0x0A); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_AWB_Ctrl0 , 0xE0); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_DSPAuto , 0xff); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_DSP_Ctrl2 , 0x0C); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_DSP_Ctrl3 , 0x00); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_DSP_Ctrl4 , 0x00); if(OV7725_W == 80) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HOutSize, 0x14); } else if(OV7725_W == 160) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HOutSize, 0x28); } else if(OV7725_W == 240) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HOutSize, 0x3c); } else if(OV7725_W == 320) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_HOutSize, 0x50); } if(OV7725_H == 60) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VOutSize, 0x1E); } else if(OV7725_H == 120) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VOutSize, 0x3c); } else if(OV7725_H == 180) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VOutSize, 0x5a); } else if(OV7725_H == 240) { soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_VOutSize, 0x78); } soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_REG28 , 0x01); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_EXHCH , 0x10); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_EXHCL , 0x1F); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM1 , 0x0c); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM2 , 0x16); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM3 , 0x2a); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM4 , 0x4e); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM5 , 0x61); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM6 , 0x6f); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM7 , 0x7b); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM8 , 0x86); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM9 , 0x8e); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM10 , 0x97); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM11 , 0xa4); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM12 , 0xaf); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM13 , 0xc5); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM14 , 0xd7); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_GAM15 , 0xe8); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_SLOP , 0x20); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_RADI , 0x00); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_COEF , 0x13); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_XC , 0x08); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_COEFB , 0x14); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_COEFR , 0x17); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_LC_CTR , 0x05); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_BDBase , 0x99); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_BDMStep , 0x03); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_SDE , 0x04); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_BRIGHT , 0x00); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_CNST , 0x40); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_SIGN , 0x06); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_UVADJ0 , 0x11); soft_iic_sccb_write_register(&ov7725_iic_struct, OV7725_UVADJ1 , 0x02); }while(0); return return_state; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 小钻风摄像头串口通信回调 // 参数说明 void // 返回参数 void // 使用示例 ov7725_uart_callback(); //------------------------------------------------------------------------------------------------------------------- static void ov7725_uart_handler (void) { uint8 data = 0; uart_query_byte(OV7725_COF_UART, &data); if(0xA5 == data) { fifo_clear(&camera_receiver_fifo); } fifo_write_element(&camera_receiver_fifo, data); } //------------------------------------------------------------------------------------------------------------------- // 函数简介 小钻风摄像头场中断 // 参数说明 void // 返回参数 void // 使用示例 ov7725_vsync_handler(); //------------------------------------------------------------------------------------------------------------------- static void ov7725_vsync_handler(void) { exti_flag_clear(OV7725_VSYNC_PIN); ov7725_dma_int_num = 0; if((ov7725_uart_dma_init_flag || ov7725_lost_flag) && camera_type == CAMERA_BIN_UART) { ov7725_uart_dma_init_flag = 0; IfxDma_resetChannel(&MODULE_DMA, OV7725_DMA_CH); ov7725_link_list_num = dma_init(OV7725_DMA_CH, OV7725_DATA_ADD, ov7725_image_binary[0], OV7725_PCLK_PIN, EXTI_TRIGGER_RISING, OV7725_IMAGE_SIZE); dma_enable(OV7725_DMA_CH); } else { if(ov7725_link_list_num == 1) { dma_set_destination(OV7725_DMA_CH, ov7725_image_binary[0]); } dma_enable(OV7725_DMA_CH); } ov7725_lost_flag = 1; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 小钻风摄像头DMA完成中断 // 参数说明 void // 返回参数 void // 使用示例 ov7725_dma_handler(); //------------------------------------------------------------------------------------------------------------------- static void ov7725_dma_handler(void) { clear_dma_flag(OV7725_DMA_CH); if(IfxDma_getChannelTransactionRequestLost(&MODULE_DMA, OV7725_DMA_CH)) {//图像有错位 ov7725_finish_flag = 0; dma_disable(OV7725_DMA_CH); IfxDma_clearChannelTransactionRequestLost(&MODULE_DMA, OV7725_DMA_CH); ov7725_uart_dma_init_flag = 1; } else { ov7725_dma_int_num++; if(ov7725_dma_int_num >= ov7725_link_list_num) { ov7725_dma_int_num = 0; ov7725_lost_flag = 0; ov7725_finish_flag = 1; dma_disable(OV7725_DMA_CH); } } } //------------------------------------------------------------------------------------------------------------------- // 函数简介 获取摄像头固件 ID // 参数说明 void // 返回参数 void // 使用示例 ov7725_uart_get_id(); // 调用该函数前请先初始化串口 // 备注信息 //------------------------------------------------------------------------------------------------------------------- uint16 ov7725_uart_get_id (void) { uint16 temp = 0; uint8 uart_buffer[4]; uint16 timeout_count = 0; uint16 return_value = 0; uint32 uart_buffer_index = 0; uart_buffer[0] = 0xA5; uart_buffer[1] = OV7725_GET_WHO_AM_I; temp = 0; uart_buffer[2] = temp >> 8; uart_buffer[3] = (uint8)temp; uart_write_buffer(OV7725_COF_UART, uart_buffer, 4); temp = 0; do { if(3 <= fifo_used(&camera_receiver_fifo)) { uart_buffer_index = 3; fifo_read_buffer(&camera_receiver_fifo, uart_buffer, &uart_buffer_index, FIFO_READ_AND_CLEAN); return_value = uart_buffer[1] << 8 | uart_buffer[2]; break; } system_delay_ms(1); }while(OV7725_INIT_TIMEOUT > timeout_count ++); return return_value; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 获取摄像头固件版本 // 参数说明 void // 返回参数 void // 使用示例 ov7725_get_version(); // 调用该函数前请先初始化串口 // 备注信息 //------------------------------------------------------------------------------------------------------------------- uint16 ov7725_get_version (void) { uint16 temp = 0; uint8 uart_buffer[4]; uint16 timeout_count = 0; uint16 return_value = 0; uint32 uart_buffer_index = 0; uart_buffer[0] = 0xA5; uart_buffer[1] = OV7725_GET_STATUS; temp = OV7725_GET_VERSION; uart_buffer[2] = temp >> 8; uart_buffer[3] = (uint8)temp; uart_write_buffer(OV7725_COF_UART, uart_buffer, 4); do { if(3 <= fifo_used(&camera_receiver_fifo)) { uart_buffer_index = 3; fifo_read_buffer(&camera_receiver_fifo, uart_buffer, &uart_buffer_index, FIFO_READ_AND_CLEAN); return_value = uart_buffer[1] << 8 | uart_buffer[2]; break; } system_delay_ms(1); }while(OV7725_INIT_TIMEOUT > timeout_count ++); return return_value; } //------------------------------------------------------------------------------------------------------------------- // 函数简介 OV7725 摄像头初始化 // 参数说明 NULL // 返回参数 void // 使用示例 ov7725_init(); // 备注信息 //------------------------------------------------------------------------------------------------------------------- uint8 ov7725_init (void) { uint16 out_time = 0; uint8 return_state = 0; gpio_init(OV7725_VSYNC_PORT_PIN, GPI, GPIO_LOW, GPI_FLOATING_IN); do { while(0 == gpio_get_level(OV7725_VSYNC_PORT_PIN)) { system_delay_ms(1); out_time ++; if(OV7725_INIT_TIMEOUT < out_time) { // 如果程序在输出了断言信息 并且提示出错位置在这里 // 那大概率没有正确连接小钻风摄像头 // 检查一下接线和供电有没有问题 如果没问题可能就是坏了 zf_log(0, "OV7725 check error."); return_state = 1; break; } } set_camera_type(CAMERA_BIN_UART, ov7725_vsync_handler, ov7725_dma_handler, ov7725_uart_handler); camera_fifo_init(); uart_init(OV7725_COF_UART, OV7725_COF_BAUR, OV7725_COF_UART_RX, OV7725_COF_UART_TX); uart_rx_interrupt(OV7725_COF_UART, 1); system_delay_ms(200); // 获取所有参数 if(ov7725_get_config(ov7725_get_confing_buffer)) { uart_rx_interrupt(OV7725_COF_UART, 0); system_delay_ms(200); set_camera_type(CAMERA_BIN_IIC, ov7725_vsync_handler, ov7725_dma_handler, NULL); // 设置连接摄像头类型 if(ov7725_iic_init()) { zf_log(0, "OV7725 IIC error."); set_camera_type(NO_CAMERE, NULL, NULL, NULL); return_state = 1; zf_log(0, "ov7725 set config error."); break; } } else { // 设置所有参数 if(ov7725_set_config(ov7725_set_confing_buffer)) { // 如果程序在输出了断言信息 并且提示出错位置在这里 // 那么就是串口通信出错并超时退出了 // 检查一下接线有没有问题 如果没问题可能就是坏了 zf_log(0, "OV7725 set confing error."); uart_rx_interrupt(OV7725_COF_UART, 0); set_camera_type(NO_CAMERE, NULL, NULL, NULL); return_state = 1; break; } // 获取所有参数 if(ov7725_get_config(ov7725_get_confing_buffer)) { // 如果程序在输出了断言信息 并且提示出错位置在这里 // 那么就是串口通信出错并超时退出了 // 检查一下接线有没有问题 如果没问题可能就是坏了 zf_log(0, "OV7725 get confing error."); uart_rx_interrupt(OV7725_COF_UART, 0); set_camera_type(NO_CAMERE, NULL, NULL, NULL); return_state = 1; break; } } ov7725_link_list_num = camera_init(OV7725_DATA_ADD, ov7725_image_binary[0], OV7725_IMAGE_SIZE); }while(0); return return_state; }