ARM嵌入式项目开发三位一体实战的源代码及原理图

/************************************************************************************** * * 文件名 : cameram.c * * 功能描述 : OV9650摄像头模组寄存器功能配置以及底层驱动程序 * **************************************************************************************/ #include <stdlib.h> #include <string.h> #include <stdio.h> #include "system.h" #include "cameram.h" #include "iic.h" #include "intc.h" #include "option.h" #include "library.h" #include "sfr6410.h" #include "sysc.h" #include "Camera.h" CAMERA oCamera; //I2C接口开启 void CAMERA_IICOpen(int Frequency) { IIC_Open(Frequency); } //I2C接口关闭 void CAMERA_IICClose(void) { IIC_Close(); } //摄像头相关寄存器读/写操作 void CAMERA_Read_Write(u32 uCAMTYPE,CAM_ATTR eCcir, CSPACE eSrcFmt, SUB_SAMPLING eSub) { u8 x; u32 uOutSel; u32 uYcSel; u32 uCrCbSel; CAMERA_IICOpen(300000); switch ( uCAMTYPE ) { case 0: oCamera.m_ucSlaveAddr = 0x5a; CAMERA_SetReg(0xec, 0x00); CAMERA_SetReg(0x72, 0x64); // 20Mhz的MCLK配置 CAMERA_SetReg(0xec, 0x00); CAMERA_GetReg(0x72, &x); UART_Printf("\nCheck 20Mhz Setting = 0x64 ----> 0x%x", x); CAMERA_SetReg(0xec, 0x07); CAMERA_SetReg(0x37, 0x00); CAMERA_SetReg(0xec, 0x00); CAMERA_GetReg(0x02, &x); UART_Printf("\nImage Size Setting is 0x00 ===> 0x%x(0:SXGA 1:VGA)\n", x); Delay(20000); // 摄像头数据格式, YC通知配置 uOutSel = (eCcir == CCIR601) ? (1<<2) : (0<<2); uYcSel = (eSrcFmt == YCBYCR || eSrcFmt == YCRYCB) ? (1<<1) : (0<<1); uCrCbSel = (eSrcFmt == YCRYCB || eSrcFmt == CRYCBY) ? (1<<0) : (0<<0); CAMERA_SetReg(0xec, 0x01); CAMERA_SetReg(0x6a, uOutSel | uYcSel | 1); CAMERA_SetReg(0xec, 0x01); CAMERA_GetReg(0x6a, &x); UART_Printf("\nImage Data 0x01======> 0x%x", x); break; case 1: CAMERA_SetReg(0xfc, 0x01); CAMERA_SetReg(0x03, 0x01); // 复位 CAMERA_SetReg(0xfc, 0x01); CAMERA_SetReg(0x04, 0x03); //PCLK = PLL/2^1 CAMERA_SetReg(0xfc, 0x01); CAMERA_GetReg(0x04, &x); // PCLK设置值 UART_Printf("\nPCLK Divider Setting Value 0x03 = 0x%x", x); CAMERA_SetReg(0xfc, 0x02); CAMERA_SetReg(0x52, 0x80); //PLL M=128d CAMERA_SetReg(0xfc, 0x02); CAMERA_GetReg(0x52, &x); // PLL_M = 128 UART_Printf("\nPLL_M Value 128 = 0x%d", x); CAMERA_SetReg(0xfc, 0x02); CAMERA_SetReg(0x50, 0x54); //PLL_S = 2 CAMERA_SetReg(0xfc, 0x02); CAMERA_GetReg(0x50, &x); // UART_Printf("\nP/S Setting Value 0x54 = 0x%x", x); CAMERA_SetSizeInS5K3BAF(eSub); /// 摄像头数据格式, YC通知设置 uOutSel = (eCcir == CCIR601) ? (1<<2) : (0<<2); uYcSel = (eSrcFmt == YCBYCR || eSrcFmt == YCRYCB) ? (1<<1) : (0<<1); uCrCbSel = (eSrcFmt == YCRYCB || eSrcFmt == CRYCBY) ? (1<<0) : (0<<0); CAMERA_SetReg(0xfc, 0x01); CAMERA_SetReg(0x02, uOutSel|uYcSel|uCrCbSel); CAMERA_SetReg(0xfc, 0x01); CAMERA_GetReg(0x02, &x); // 图像尺寸设置 UART_Printf("\nImage Size Setting Value 0x07 = 0x%x\n\n", x); break; default : break; } CAMERA_IICClose(); } //寄存器地址及数据选择 void CAMERA_SetReg_4CA(u16 ucSubAddr, u16 ucData) { u16 D[2]; D[0] = ucSubAddr; D[1] = ucData; } //获取寄存器值 void CAMERA_GetReg_4CA(u16 ucSubAddr, u16 ucData) { u16 D[2]; u16 * RD[2]; D[0] = ucSubAddr; D[1] = ucData; } //相关寄存器值配置 #if 0 void CAMERA_SetReg(u8 ucSubAddr, u8 ucData) { u8 D[2]; D[0] = ucSubAddr; D[1] = ucData; IIC_Write(oCamera.m_ucSlaveAddr, D[0], D[1]); } #else // 用于调试模式 void CAMERA_SetReg(u8 ucSubAddr, u8 ucData) { u8 D[2]; u8 x; D[0] = ucSubAddr; D[1] = ucData; IIC_Write(oCamera.m_ucSlaveAddr, D[0], D[1]); if ( ucSubAddr != 0xfc) { CAMERA_GetReg(ucSubAddr, &x); if ( ucData != x ) { UART_Printf("Addr = %x, Value=%x, Real=%x\n", ucSubAddr, ucData, x); } } else { UART_Printf("-------------------Page = , %x\n", ucData); } } #endif void CAMERA_SetSizeInS5K4BAF(SUB_SAMPLING eSub) { u8 x; u8 ucSub; oCamera.m_ucSlaveAddr = 0x5a; /// Size subsampling setting ucSub = (eSub == SUB_SAMPLING0) ? 0 : (eSub == SUB_SAMPLING2) ? 9 : (eSub == SUB_SAMPLING4) ? 11 : 0xff; Assert(ucSub < 0xff); CAMERA_SetReg(0xfc, 0x00); CAMERA_SetReg(0x02, ucSub); } //获取摄像头数据 #if 0 void CAMERA_GetReg(u8 ucSubAddr, u8* ucData) { IIC_SetWrite( oCamera.m_ucSlaveAddr, &ucSubAddr, 1); IIC_SetRead( oCamera.m_ucSlaveAddr, ucData, 1); IIC_Wait(); } #else void CAMERA_GetReg(u8 ucSubAddr, u8* ucData) { IIC_SetWrite( oCamera.m_ucSlaveAddr, &ucSubAddr, 1); IIC_SetRead( oCamera.m_ucSlaveAddr, ucData, 1); IIC_Wait(); } #endif //摄像头模组初始化 void CAMERA_InitOV9650(CAM_ATTR eCcir, u32 uBits, u8 bInv, CSPACE eSrcFmt) { u8 ucVal; // IIC_Init(); oCamera.m_ucSlaveAddr = 0x42; // CAMERA_SetReg(0x12, 0x80); // Camera Soft reset. Self cleared after reset. // Delay(100); CAMERA_SetReg(0x00, 0x00); // AGC gain CAMERA_SetReg(0x01, 0x80); // blue gain CAMERA_SetReg(0x02, 0x80); // red gain CAMERA_SetReg(0x03, 0xb0); // saturation control CAMERA_SetReg(0x06, 0x60); // set brightness - CJH CAMERA_SetReg(0x0c, 0x24); // set white balance blue background CAMERA_SetReg(0x0d, 0x24); // set white balance red background CAMERA_SetReg(0x10, 0xff); // set auto exposure time, (not used in auto adjust mode) ucVal = 0; if (bInv) { ucVal |= (0<<7); ucVal |= (1<<6); } else { ucVal |= (1<<7); ucVal |= (0<<6); } ucVal |= (0<<0); CAMERA_SetReg(0x11, ucVal); ucVal = 0; if ( eSrcFmt == YCBYCR || eSrcFmt == YCRYCB) ucVal |= (1<<4); ucVal |= (1<<2); // enable white balnace ucVal |= (1<<5); // enable AGC CAMERA_SetReg(0x12, ucVal); ucVal = 0; ucVal |= (uBits == 8 ? 1 : 0)<<5; ucVal |= (eCcir == CCIR656 ? 1 : 0)<<4; CAMERA_SetReg(0x13, ucVal); Delay(10); ucVal |= 0; if (eSrcFmt == CBYCRY || eSrcFmt == YCBYCR) ucVal |= (1<<0); ucVal |= (bInv ? 1 : 0)<<6; CAMERA_SetReg(0x15, ucVal); Delay(10); CAMERA_SetReg(0x16, 0x03); // Field mode : 11b-FRAME mode -> FD<7:2> is useless (default) CAMERA_SetReg(0x17, 0x2f); // 47 -> Horizontal Start CAMERA_SetReg(0x18, 0xcf); // (207-47)*4=640 -> Horizontal End CAMERA_SetReg(0x19, 0x06); // 6 -> Vertical Start CAMERA_SetReg(0x1a, 0xf5); // (245-6+1)*2=480 -> Vertical End CAMERA_SetReg(0x1b, 0x00); // pixel shift=0 //(??old,incorrect) limit vertical size to 480, second stage aperture correction enable CAMERA_SetReg(0x20, (0<<7)); // limit vertical size to 480 -> bit 7: Modified CCIR656 format vertical sizing enabled CAMERA_SetReg(0x21, 0x80); // Y Channel Offset Adjustment - 0 , direction - Subtract CAMERA_SetReg(0x22, 0x80); // U Channel Offset Adjustment - 0 CAMERA_SetReg(0x23, 0x00); // Crystal Current control : maximum current CAMERA_SetReg(0x26, 0xa2); // digital sharpness threshold(64mV), magnitude(100%). CAMERA_SetReg(0x27, 0xe2 ); // default, disable CCIR rang clip //?? old value: 0xea, but bit[3] is reserved, why 1 ? CAMERA_SetReg(0x29, (0<<6)); // CHSYNC & VSYNC master mode CAMERA_SetReg(0x2a, 0x00); // default( // (?? old,incorrect)frame rate high, 60Hz, 50Hz:0x80, UV delay 2 pixel. - CJH CAMERA_SetReg(0x2b, 0x00); // default // (??old,incorrect) frame rate low, 60Hz, 50Hz:0xac CAMERA_SetReg(0x2c, 0x88); // default CAMERA_SetReg(0x2e, 0x80); // default CAMERA_SetReg(0x2f, 0x44); // default CAMERA_SetReg(0x60, 0x27); // default CAMERA_SetReg(0x61, 0x82); // YUV mode (7'st bit -> 1(YUV mode)) CAMERA_SetReg(0x62, 0x5f); // RGB Gamma control, gamma=010_1111b CAMERA_SetReg(0x63, 0xd5); // reserved value ??? CAMERA_SetReg(0x64, 0x57); // enable Y Gamma,gammma=010_1011b CAMERA_SetReg(0x65, 0x80+(3<<0));//??? bit[7:3]is reserved 01000b, why 0x80?, ADC_ref=11b(1.26V peak) CAMERA_SetReg(0x66, 0x55); // default CAMERA_SetReg(0x68, 0xcf)