zara
/
esp32-camera
mirror of https://github.com/espressif/esp32-camera.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
162 Commits
3 Branches
17 Tags
4.1 MiB
 
 
 
 
Tree: 6b1efc1edd
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '6b1efc1edd'
${ noResults }
esp32-camera/sensors/ov7725.c

575 lines
16 KiB
Raw Blame History

/*
* 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_MASK}, //Invert VSYNC and MASK PCLK
{BDBASE, 0x7F},
{DBSTEP, 0x03},
{AEW, 0x96},
{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;
}