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esp32-camera/sensors/ov7725.c
Kevincoooool 221d24da19 bugfix:ov7725 vsync get frame failed (#335) 
When I use OV7725 and OV7670, I can't get the image. This pr modifies the VSYNC register of OV7725 7670, and the image can be obtained normally, and the white balance is adjusted to make the obtained image normal.
2021-12-23 12:12:12 +02:00

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/*
* This file is part of the OpenMV project.
* Copyright (c) 2013/2014 Ibrahim Abdelkader <i.abdalkader@gmail.com>
* This work is licensed under the MIT license, see the file LICENSE for details.
*
* OV7725 driver.
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "sccb.h"
#include "xclk.h"
#include "ov7725.h"
#include "ov7725_regs.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
#include "esp32-hal-log.h"
#else
#include "esp_log.h"
static const char* TAG = "ov7725";
#endif
static const uint8_t default_regs[][2] = {
{COM3, COM3_SWAP_YUV},
{COM7, COM7_RES_QVGA | COM7_FMT_YUV},
{COM4, 0x01 | 0x00}, /* bypass PLL (0x00:off, 0x40:4x, 0x80:6x, 0xC0:8x) */
{CLKRC, 0x80 | 0x03}, /* Res/Bypass pre-scalar (0x40:bypass, 0x00-0x3F:prescaler PCLK=XCLK/(prescaler + 1)/2 ) */
// QVGA Window Size
{HSTART, 0x3F},
{HSIZE, 0x50},
{VSTART, 0x03},
{VSIZE, 0x78},
{HREF, 0x00},
// Scale down to QVGA Resolution
{HOUTSIZE, 0x50},
{VOUTSIZE, 0x78},
{EXHCH, 0x00},
{COM12, 0x03},
{TGT_B, 0x7F},
{FIXGAIN, 0x09},
{AWB_CTRL0, 0xE0},
{DSP_CTRL1, 0xFF},
{DSP_CTRL2, DSP_CTRL2_VDCW_EN | DSP_CTRL2_HDCW_EN | DSP_CTRL2_HZOOM_EN | DSP_CTRL2_VZOOM_EN},
{DSP_CTRL3, 0x00},
{DSP_CTRL4, 0x00},
{DSPAUTO, 0xFF},
{COM8, 0xF0},
{COM6, 0xC5},
{COM9, 0x11},
{COM10, COM10_VSYNC_NEG | COM10_PCLK_FREE}, //Invert VSYNC and MASK PCLK
{BDBASE, 0x7F},
{DBSTEP, 0x03},
{AEW, 0x75},
{AEB, 0x64},
{VPT, 0xA1},
{EXHCL, 0x00},
{AWB_CTRL3, 0xAA},
{COM8, 0xFF},
//Gamma
{GAM1, 0x0C},
{GAM2, 0x16},
{GAM3, 0x2A},
{GAM4, 0x4E},
{GAM5, 0x61},
{GAM6, 0x6F},
{GAM7, 0x7B},
{GAM8, 0x86},
{GAM9, 0x8E},
{GAM10, 0x97},
{GAM11, 0xA4},
{GAM12, 0xAF},
{GAM13, 0xC5},
{GAM14, 0xD7},
{GAM15, 0xE8},
{SLOP, 0x20},
{EDGE1, 0x05},
{EDGE2, 0x03},
{EDGE3, 0x00},
{DNSOFF, 0x01},
{MTX1, 0xB0},
{MTX2, 0x9D},
{MTX3, 0x13},
{MTX4, 0x16},
{MTX5, 0x7B},
{MTX6, 0x91},
{MTX_CTRL, 0x1E},
{BRIGHTNESS, 0x08},
{CONTRAST, 0x30},
{UVADJ0, 0x81},
{SDE, (SDE_CONT_BRIGHT_EN | SDE_SATURATION_EN)},
// For 30 fps/60Hz
{DM_LNL, 0x00},
{DM_LNH, 0x00},
{BDBASE, 0x7F},
{DBSTEP, 0x03},
// Lens Correction, should be tuned with real camera module
{LC_RADI, 0x10},
{LC_COEF, 0x10},
{LC_COEFB, 0x14},
{LC_COEFR, 0x17},
{LC_CTR, 0x05},
{COM5, 0xF5}, //0x65
{0x00, 0x00},
};
static int get_reg(sensor_t *sensor, int reg, int mask)
{
int ret = SCCB_Read(sensor->slv_addr, reg & 0xFF);
if(ret > 0){
ret &= mask;
}
return ret;
}
static int set_reg(sensor_t *sensor, int reg, int mask, int value)
{
int ret = 0;
ret = SCCB_Read(sensor->slv_addr, reg & 0xFF);
if(ret < 0){
return ret;
}
value = (ret & ~mask) | (value & mask);
ret = SCCB_Write(sensor->slv_addr, reg & 0xFF, value);
return ret;
}
static int set_reg_bits(sensor_t *sensor, uint8_t reg, uint8_t offset, uint8_t length, uint8_t value)
{
int ret = 0;
ret = SCCB_Read(sensor->slv_addr, reg);
if(ret < 0){
return ret;
}
uint8_t mask = ((1 << length) - 1) << offset;
value = (ret & ~mask) | ((value << offset) & mask);
ret = SCCB_Write(sensor->slv_addr, reg & 0xFF, value);
return ret;
}
static int get_reg_bits(sensor_t *sensor, uint8_t reg, uint8_t offset, uint8_t length)
{
int ret = 0;
ret = SCCB_Read(sensor->slv_addr, reg);
if(ret < 0){
return ret;
}
uint8_t mask = ((1 << length) - 1) << offset;
return (ret & mask) >> offset;
}
static int reset(sensor_t *sensor)
{
int i=0;
const uint8_t (*regs)[2];
// Reset all registers
SCCB_Write(sensor->slv_addr, COM7, COM7_RESET);
// Delay 10 ms
vTaskDelay(10 / portTICK_PERIOD_MS);
// Write default regsiters
for (i=0, regs = default_regs; regs[i][0]; i++) {
SCCB_Write(sensor->slv_addr, regs[i][0], regs[i][1]);
}
// Delay
vTaskDelay(30 / portTICK_PERIOD_MS);
return 0;
}
static int set_pixformat(sensor_t *sensor, pixformat_t pixformat)
{
int ret=0;
sensor->pixformat = pixformat;
// Read register COM7
uint8_t reg = SCCB_Read(sensor->slv_addr, COM7);
switch (pixformat) {
case PIXFORMAT_RGB565:
reg = COM7_SET_RGB(reg, COM7_FMT_RGB565);
break;
case PIXFORMAT_YUV422:
case PIXFORMAT_GRAYSCALE:
reg = COM7_SET_FMT(reg, COM7_FMT_YUV);
break;
default:
return -1;
}
// Write back register COM7
ret = SCCB_Write(sensor->slv_addr, COM7, reg);
// Delay
vTaskDelay(30 / portTICK_PERIOD_MS);
return ret;
}
static int set_framesize(sensor_t *sensor, framesize_t framesize)
{
int ret=0;
if (framesize > FRAMESIZE_VGA) {
return -1;
}
uint16_t w = resolution[framesize].width;
uint16_t h = resolution[framesize].height;
uint8_t reg = SCCB_Read(sensor->slv_addr, COM7);
sensor->status.framesize = framesize;
// Write MSBs
ret |= SCCB_Write(sensor->slv_addr, HOUTSIZE, w>>2);
ret |= SCCB_Write(sensor->slv_addr, VOUTSIZE, h>>1);
ret |= SCCB_Write(sensor->slv_addr, HSIZE, w>>2);
ret |= SCCB_Write(sensor->slv_addr, VSIZE, h>>1);
// Write LSBs
ret |= SCCB_Write(sensor->slv_addr, HREF, ((w&0x3) | ((h&0x1) << 2)));
if (framesize < FRAMESIZE_VGA) {
// Enable auto-scaling/zooming factors
ret |= SCCB_Write(sensor->slv_addr, DSPAUTO, 0xFF);
ret |= SCCB_Write(sensor->slv_addr, HSTART, 0x3F);
ret |= SCCB_Write(sensor->slv_addr, VSTART, 0x03);
ret |= SCCB_Write(sensor->slv_addr, COM7, reg | COM7_RES_QVGA);
ret |= SCCB_Write(sensor->slv_addr, CLKRC, 0x80 | 0x01);
} else {
// Disable auto-scaling/zooming factors
ret |= SCCB_Write(sensor->slv_addr, DSPAUTO, 0xF3);
// Clear auto-scaling/zooming factors
ret |= SCCB_Write(sensor->slv_addr, SCAL0, 0x00);
ret |= SCCB_Write(sensor->slv_addr, SCAL1, 0x00);
ret |= SCCB_Write(sensor->slv_addr, SCAL2, 0x00);
ret |= SCCB_Write(sensor->slv_addr, HSTART, 0x23);
ret |= SCCB_Write(sensor->slv_addr, VSTART, 0x07);
ret |= SCCB_Write(sensor->slv_addr, COM7, reg & ~COM7_RES_QVGA);
ret |= SCCB_Write(sensor->slv_addr, CLKRC, 0x80 | 0x03);
}
// Delay
vTaskDelay(30 / portTICK_PERIOD_MS);
return ret;
}
static int set_colorbar(sensor_t *sensor, int enable)
{
int ret=0;
uint8_t reg;
sensor->status.colorbar = enable;
// Read reg COM3
reg = SCCB_Read(sensor->slv_addr, COM3);
// Enable colorbar test pattern output
reg = COM3_SET_CBAR(reg, enable);
// Write back COM3
ret |= SCCB_Write(sensor->slv_addr, COM3, reg);
// Read reg DSP_CTRL3
reg = SCCB_Read(sensor->slv_addr, DSP_CTRL3);
// Enable DSP colorbar output
reg = DSP_CTRL3_SET_CBAR(reg, enable);
// Write back DSP_CTRL3
ret |= SCCB_Write(sensor->slv_addr, DSP_CTRL3, reg);
return ret;
}
static int set_whitebal(sensor_t *sensor, int enable)
{
if(set_reg_bits(sensor, COM8, 1, 1, enable) >= 0){
sensor->status.awb = !!enable;
}
return sensor->status.awb;
}
static int set_gain_ctrl(sensor_t *sensor, int enable)
{
if(set_reg_bits(sensor, COM8, 2, 1, enable) >= 0){
sensor->status.agc = !!enable;
}
return sensor->status.agc;
}
static int set_exposure_ctrl(sensor_t *sensor, int enable)
{
if(set_reg_bits(sensor, COM8, 0, 1, enable) >= 0){
sensor->status.aec = !!enable;
}
return sensor->status.aec;
}
static int set_hmirror(sensor_t *sensor, int enable)
{
if(set_reg_bits(sensor, COM3, 6, 1, enable) >= 0){
sensor->status.hmirror = !!enable;
}
return sensor->status.hmirror;
}
static int set_vflip(sensor_t *sensor, int enable)
{
if(set_reg_bits(sensor, COM3, 7, 1, enable) >= 0){
sensor->status.vflip = !!enable;
}
return sensor->status.vflip;
}
static int set_dcw_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, 0x65, 2, 1, !enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set dcw to: %d", enable);
sensor->status.dcw = enable;
}
return ret;
}
static int set_aec2(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, COM8, 7, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set aec2 to: %d", enable);
sensor->status.aec2 = enable;
}
return ret;
}
static int set_bpc_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, 0x64, 1, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set bpc to: %d", enable);
sensor->status.bpc = enable;
}
return ret;
}
static int set_wpc_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, 0x64, 0, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set wpc to: %d", enable);
sensor->status.wpc = enable;
}
return ret;
}
static int set_raw_gma_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, 0x64, 2, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set raw_gma to: %d", enable);
sensor->status.raw_gma = enable;
}
return ret;
}
static int set_lenc_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, LC_CTR, 0, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set lenc to: %d", enable);
sensor->status.lenc = enable;
}
return ret;
}
//real gain
static int set_agc_gain(sensor_t *sensor, int gain)
{
int ret = 0;
ret = set_reg_bits(sensor, COM9, 4, 3, gain % 5);
if (ret == 0) {
ESP_LOGD(TAG, "Set gain to: %d", gain);
sensor->status.agc_gain = gain;
}
return ret;
}
static int set_aec_value(sensor_t *sensor, int value)
{
int ret = 0;
ret = SCCB_Write(sensor->slv_addr, AEC, value & 0xff) | SCCB_Write(sensor->slv_addr, AECH, value >> 8);
if (ret == 0) {
ESP_LOGD(TAG, "Set aec_value to: %d", value);
sensor->status.aec_value = value;
}
return ret;
}
static int set_awb_gain_dsp(sensor_t *sensor, int enable)
{
int ret = 0;
ret = set_reg_bits(sensor, 0x63, 7, 1, enable);
if (ret == 0) {
ESP_LOGD(TAG, "Set awb_gain to: %d", enable);
sensor->status.awb_gain = enable;
}
return ret;
}
static int set_brightness(sensor_t *sensor, int level)
{
int ret = 0;
ret = SCCB_Write(sensor->slv_addr, 0x9B, level);
if (ret == 0) {
ESP_LOGD(TAG, "Set brightness to: %d", level);
sensor->status.brightness = level;
}
return ret;
}
static int set_contrast(sensor_t *sensor, int level)
{
int ret = 0;
ret = SCCB_Write(sensor->slv_addr, 0x9C, level);
if (ret == 0) {
ESP_LOGD(TAG, "Set contrast to: %d", level);
sensor->status.contrast = level;
}
return ret;
}
static int init_status(sensor_t *sensor)
{
sensor->status.brightness = SCCB_Read(sensor->slv_addr, 0x9B);
sensor->status.contrast = SCCB_Read(sensor->slv_addr, 0x9C);
sensor->status.saturation = 0;
sensor->status.ae_level = 0;
sensor->status.special_effect = get_reg_bits(sensor, 0x64, 5, 1);
sensor->status.wb_mode = get_reg_bits(sensor, 0x6B, 7, 1);
sensor->status.agc_gain = get_reg_bits(sensor, COM9, 4, 3);
sensor->status.aec_value = SCCB_Read(sensor->slv_addr, AEC) | (SCCB_Read(sensor->slv_addr, AECH) << 8);
sensor->status.gainceiling = SCCB_Read(sensor->slv_addr, 0x00);
sensor->status.awb = get_reg_bits(sensor, COM8, 1, 1);
sensor->status.awb_gain = get_reg_bits(sensor, 0x63, 7, 1);
sensor->status.aec = get_reg_bits(sensor, COM8, 0, 1);
sensor->status.aec2 = get_reg_bits(sensor, COM8, 7, 1);
sensor->status.agc = get_reg_bits(sensor, COM8, 2, 1);
sensor->status.bpc = get_reg_bits(sensor, 0x64, 1, 1);
sensor->status.wpc = get_reg_bits(sensor, 0x64, 0, 1);
sensor->status.raw_gma = get_reg_bits(sensor, 0x64, 2, 1);
sensor->status.lenc = get_reg_bits(sensor, LC_CTR, 0, 1);
sensor->status.hmirror = get_reg_bits(sensor, COM3, 6, 1);
sensor->status.vflip = get_reg_bits(sensor, COM3, 7, 1);
sensor->status.dcw = get_reg_bits(sensor, 0x65, 2, 1);
sensor->status.colorbar = get_reg_bits(sensor, COM3, 0, 1);
sensor->status.sharpness = get_reg_bits(sensor, EDGE0, 0, 5);
sensor->status.denoise = SCCB_Read(sensor->slv_addr, 0x8E);
return 0;
}
static int set_dummy(sensor_t *sensor, int val){ return -1; }
static int set_gainceiling_dummy(sensor_t *sensor, gainceiling_t val){ return -1; }
static int set_res_raw(sensor_t *sensor, int startX, int startY, int endX, int endY, int offsetX, int offsetY, int totalX, int totalY, int outputX, int outputY, bool scale, bool binning){return -1;}
static int _set_pll(sensor_t *sensor, int bypass, int multiplier, int sys_div, int root_2x, int pre_div, int seld5, int pclk_manual, int pclk_div){return -1;}
static int set_xclk(sensor_t *sensor, int timer, int xclk)
{
int ret = 0;
sensor->xclk_freq_hz = xclk * 1000000U;
ret = xclk_timer_conf(timer, sensor->xclk_freq_hz);
return ret;
}
int ov7725_detect(int slv_addr, sensor_id_t *id)
{
if (OV7725_SCCB_ADDR == slv_addr) {
SCCB_Write(slv_addr, 0xFF, 0x01);//bank sensor
uint16_t PID = SCCB_Read(slv_addr, 0x0A);
if (OV7725_PID == PID) {
id->PID = PID;
id->VER = SCCB_Read(slv_addr, REG_VER);
id->MIDL = SCCB_Read(slv_addr, REG_MIDL);
id->MIDH = SCCB_Read(slv_addr, REG_MIDH);
return PID;
} else {
ESP_LOGI(TAG, "Mismatch PID=0x%x", PID);
}
}
return 0;
}
int ov7725_init(sensor_t *sensor)
{
// Set function pointers
sensor->reset = reset;
sensor->init_status = init_status;
sensor->set_pixformat = set_pixformat;
sensor->set_framesize = set_framesize;
sensor->set_colorbar = set_colorbar;
sensor->set_whitebal = set_whitebal;
sensor->set_gain_ctrl = set_gain_ctrl;
sensor->set_exposure_ctrl = set_exposure_ctrl;
sensor->set_hmirror = set_hmirror;
sensor->set_vflip = set_vflip;
sensor->set_brightness = set_brightness;
sensor->set_contrast = set_contrast;
sensor->set_aec2 = set_aec2;
sensor->set_aec_value = set_aec_value;
sensor->set_awb_gain = set_awb_gain_dsp;
sensor->set_agc_gain = set_agc_gain;
sensor->set_dcw = set_dcw_dsp;
sensor->set_bpc = set_bpc_dsp;
sensor->set_wpc = set_wpc_dsp;
sensor->set_raw_gma = set_raw_gma_dsp;
sensor->set_lenc = set_lenc_dsp;
//not supported
sensor->set_saturation= set_dummy;
sensor->set_sharpness = set_dummy;
sensor->set_denoise = set_dummy;
sensor->set_quality = set_dummy;
sensor->set_special_effect = set_dummy;
sensor->set_wb_mode = set_dummy;
sensor->set_ae_level = set_dummy;
sensor->set_gainceiling = set_gainceiling_dummy;
sensor->get_reg = get_reg;
sensor->set_reg = set_reg;
sensor->set_res_raw = set_res_raw;
sensor->set_pll = _set_pll;
sensor->set_xclk = set_xclk;
// Retrieve sensor's signature
sensor->id.MIDH = SCCB_Read(sensor->slv_addr, REG_MIDH);
sensor->id.MIDL = SCCB_Read(sensor->slv_addr, REG_MIDL);
sensor->id.PID = SCCB_Read(sensor->slv_addr, REG_PID);
sensor->id.VER = SCCB_Read(sensor->slv_addr, REG_VER);
ESP_LOGD(TAG, "OV7725 Attached");
return 0;
}
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