Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
2 contributors

Users who have contributed to this file

@iabdalkader @kwagyeman
868 lines (743 sloc) 26.7 KB
/*
* This file is part of the OpenMV project.
*
* Copyright (c) 2013-2019 Ibrahim Abdelkader <iabdalkader@openmv.io>
* Copyright (c) 2013-2019 Kwabena W. Agyeman <kwagyeman@openmv.io>
*
* This work is licensed under the MIT license, see the file LICENSE for details.
*
* OV2640 driver.
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include STM32_HAL_H
#include "cambus.h"
#include "ov2640.h"
#include "ov2640_regs.h"
#include "systick.h"
#include "omv_boardconfig.h"
#define CIF_WIDTH (400)
#define CIF_HEIGHT (296)
#define SVGA_WIDTH (800)
#define SVGA_HEIGHT (600)
#define UXGA_WIDTH (1600)
#define UXGA_HEIGHT (1200)
static const uint8_t default_regs[][2] = {
// From Linux Driver.
{BANK_SEL, BANK_SEL_DSP},
{0x2c, 0xff},
{0x2e, 0xdf},
{BANK_SEL, BANK_SEL_SENSOR},
{0x3c, 0x32},
{CLKRC, CLKRC_DOUBLE},
{COM2, COM2_OUT_DRIVE_3x},
{REG04, REG04_SET(REG04_HFLIP_IMG | REG04_VFLIP_IMG | REG04_VREF_EN | REG04_HREF_EN)},
{COM8, COM8_SET(COM8_BNDF_EN | COM8_AGC_EN | COM8_AEC_EN)},
{COM9, COM9_AGC_SET(COM9_AGC_GAIN_8x)},
{0x2c, 0x0c},
{0x33, 0x78},
{0x3a, 0x33},
{0x3b, 0xfb},
{0x3e, 0x00},
{0x43, 0x11},
{0x16, 0x10},
{0x39, 0x02},
{0x35, 0x88},
{0x22, 0x0a},
{0x37, 0x40},
{0x23, 0x00},
{ARCOM2, 0xa0},
{0x06, 0x02},
{0x06, 0x88},
{0x07, 0xc0},
{0x0d, 0xb7},
{0x0e, 0x01},
{0x4c, 0x00},
{0x4a, 0x81},
{0x21, 0x99},
{AEW, 0x40},
{AEB, 0x38},
{VV, VV_AGC_TH_SET(0x08, 0x02)},
{0x5c, 0x00},
{0x63, 0x00},
{FLL, 0x22},
{COM3, COM3_BAND_SET(COM3_BAND_AUTO)},
{REG5D, 0x55},
{REG5E, 0x7d},
{REG5F, 0x7d},
{REG60, 0x55},
{HISTO_LOW, 0x70},
{HISTO_HIGH, 0x80},
{0x7c, 0x05},
{0x20, 0x80},
{0x28, 0x30},
{0x6c, 0x00},
{0x6d, 0x80},
{0x6e, 0x00},
{0x70, 0x02},
{0x71, 0x94},
{0x73, 0xc1},
{0x3d, 0x34},
{COM7, COM7_RES_UXGA | COM7_ZOOM_EN},
{0x5a, 0x57},
{COM25, 0x00},
{BD50, 0xbb},
{BD60, 0x9c},
{BANK_SEL, BANK_SEL_DSP},
{0xe5, 0x7f},
{MC_BIST, MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL},
{0x41, 0x24},
{RESET, RESET_JPEG | RESET_DVP},
{0x76, 0xff},
{0x33, 0xa0},
{0x42, 0x20},
{0x43, 0x18},
{0x4c, 0x00},
{CTRL3, CTRL3_BPC_EN | CTRL3_WPC_EN | 0x10},
{0x88, 0x3f},
{0xd7, 0x03},
{0xd9, 0x10},
{R_DVP_SP, R_DVP_SP_AUTO_MODE | 0x2},
{0xc8, 0x08},
{0xc9, 0x80},
{BPADDR, 0x00},
{BPDATA, 0x00},
{BPADDR, 0x03},
{BPDATA, 0x48},
{BPDATA, 0x48},
{BPADDR, 0x08},
{BPDATA, 0x20},
{BPDATA, 0x10},
{BPDATA, 0x0e},
{0x90, 0x00},
{0x91, 0x0e},
{0x91, 0x1a},
{0x91, 0x31},
{0x91, 0x5a},
{0x91, 0x69},
{0x91, 0x75},
{0x91, 0x7e},
{0x91, 0x88},
{0x91, 0x8f},
{0x91, 0x96},
{0x91, 0xa3},
{0x91, 0xaf},
{0x91, 0xc4},
{0x91, 0xd7},
{0x91, 0xe8},
{0x91, 0x20},
{0x92, 0x00},
{0x93, 0x06},
{0x93, 0xe3},
{0x93, 0x03},
{0x93, 0x03},
{0x93, 0x00},
{0x93, 0x02},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x96, 0x00},
{0x97, 0x08},
{0x97, 0x19},
{0x97, 0x02},
{0x97, 0x0c},
{0x97, 0x24},
{0x97, 0x30},
{0x97, 0x28},
{0x97, 0x26},
{0x97, 0x02},
{0x97, 0x98},
{0x97, 0x80},
{0x97, 0x00},
{0x97, 0x00},
{0xa4, 0x00},
{0xa8, 0x00},
{0xc5, 0x11},
{0xc6, 0x51},
{0xbf, 0x80},
{0xc7, 0x10}, /* simple AWB */
{0xb6, 0x66},
{0xb8, 0xA5},
{0xb7, 0x64},
{0xb9, 0x7C},
{0xb3, 0xaf},
{0xb4, 0x97},
{0xb5, 0xFF},
{0xb0, 0xC5},
{0xb1, 0x94},
{0xb2, 0x0f},
{0xc4, 0x5c},
{0xa6, 0x00},
{0xa7, 0x20},
{0xa7, 0xd8},
{0xa7, 0x1b},
{0xa7, 0x31},
{0xa7, 0x00},
{0xa7, 0x18},
{0xa7, 0x20},
{0xa7, 0xd8},
{0xa7, 0x19},
{0xa7, 0x31},
{0xa7, 0x00},
{0xa7, 0x18},
{0xa7, 0x20},
{0xa7, 0xd8},
{0xa7, 0x19},
{0xa7, 0x31},
{0xa7, 0x00},
{0xa7, 0x18},
{0x7f, 0x00},
{0xe5, 0x1f},
{0xe1, 0x77},
{0xdd, 0x7f},
{CTRL0, CTRL0_YUV422 | CTRL0_YUV_EN | CTRL0_RGB_EN},
// OpenMV Custom.
{BANK_SEL, BANK_SEL_SENSOR},
{0x0f, 0x4b},
{COM1, 0x8f},
// End.
{0x00, 0x00},
};
// Looks really bad.
//static const uint8_t cif_regs[][2] = {
// {BANK_SEL, BANK_SEL_SENSOR},
// {COM7, COM7_RES_CIF},
// {COM1, 0x06 | 0x80},
// {HSTART, 0x11},
// {HSTOP, 0x43},
// {VSTART, 0x01}, // 0x01 fixes issue with garbage pixels in the image...
// {VSTOP, 0x97},
// {REG32, 0x09},
// {BANK_SEL, BANK_SEL_DSP},
// {RESET, RESET_DVP},
// {SIZEL, SIZEL_HSIZE8_11_SET(CIF_WIDTH) | SIZEL_HSIZE8_SET(CIF_WIDTH) | SIZEL_VSIZE8_SET(CIF_HEIGHT)},
// {HSIZE8, HSIZE8_SET(CIF_WIDTH)},
// {VSIZE8, VSIZE8_SET(CIF_HEIGHT)},
// {CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN | CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN},
// {0, 0},
//};
static const uint8_t svga_regs[][2] = {
{BANK_SEL, BANK_SEL_SENSOR},
{COM7, COM7_RES_SVGA},
{COM1, 0x0A | 0x80},
{HSTART, 0x11},
{HSTOP, 0x43},
{VSTART, 0x01}, // 0x01 fixes issue with garbage pixels in the image...
{VSTOP, 0x97},
{REG32, 0x09},
{BANK_SEL, BANK_SEL_DSP},
{RESET, RESET_DVP},
{SIZEL, SIZEL_HSIZE8_11_SET(SVGA_WIDTH) | SIZEL_HSIZE8_SET(SVGA_WIDTH) | SIZEL_VSIZE8_SET(SVGA_HEIGHT)},
{HSIZE8, HSIZE8_SET(SVGA_WIDTH)},
{VSIZE8, VSIZE8_SET(SVGA_HEIGHT)},
{CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN | CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN},
{0, 0},
};
static const uint8_t uxga_regs[][2] = {
{BANK_SEL, BANK_SEL_SENSOR},
{COM7, COM7_RES_UXGA},
{COM1, 0x0F | 0x80},
{HSTART, 0x11},
{HSTOP, 0x75},
{VSTART, 0x01},
{VSTOP, 0x97},
{REG32, 0x36},
{BANK_SEL, BANK_SEL_DSP},
{RESET, RESET_DVP},
{SIZEL, SIZEL_HSIZE8_11_SET(UXGA_WIDTH) | SIZEL_HSIZE8_SET(UXGA_WIDTH) | SIZEL_VSIZE8_SET(UXGA_HEIGHT)},
{HSIZE8, HSIZE8_SET(UXGA_WIDTH)},
{VSIZE8, VSIZE8_SET(UXGA_HEIGHT)},
{CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN | CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN},
{0, 0},
};
static const uint8_t yuv422_regs[][2] = {
{BANK_SEL, BANK_SEL_DSP},
{R_BYPASS, R_BYPASS_DSP_EN},
{IMAGE_MODE, IMAGE_MODE_YUV422},
{0xd7, 0x03},
{0x33, 0xa0},
{0xe5, 0x1f},
{0xe1, 0x67},
{RESET, 0x00},
{R_BYPASS, R_BYPASS_DSP_EN},
{0, 0},
};
static const uint8_t rgb565_regs[][2] = {
{BANK_SEL, BANK_SEL_DSP},
{R_BYPASS, R_BYPASS_DSP_EN},
{IMAGE_MODE, IMAGE_MODE_RGB565},
{0xd7, 0x03},
{RESET, 0x00},
{R_BYPASS, R_BYPASS_DSP_EN},
{0, 0},
};
static const uint8_t bayer_regs[][2] = {
{BANK_SEL, BANK_SEL_DSP},
{R_BYPASS, R_BYPASS_DSP_EN},
{IMAGE_MODE, IMAGE_MODE_RAW10},
{0xd7, 0x03},
{RESET, 0x00},
{R_BYPASS, R_BYPASS_DSP_EN},
{0, 0},
};
static const uint8_t jpeg_regs[][2] = {
{BANK_SEL, BANK_SEL_DSP},
{R_BYPASS, R_BYPASS_DSP_EN},
{IMAGE_MODE, IMAGE_MODE_JPEG_EN},
{0xd7, 0x03},
{RESET, 0x00},
{R_BYPASS, R_BYPASS_DSP_EN},
{0, 0},
};
#define NUM_BRIGHTNESS_LEVELS (5)
static const uint8_t brightness_regs[NUM_BRIGHTNESS_LEVELS + 1][5] = {
{BPADDR, BPDATA, BPADDR, BPDATA, BPDATA},
{0x00, 0x04, 0x09, 0x00, 0x00}, /* -2 */
{0x00, 0x04, 0x09, 0x10, 0x00}, /* -1 */
{0x00, 0x04, 0x09, 0x20, 0x00}, /* 0 */
{0x00, 0x04, 0x09, 0x30, 0x00}, /* +1 */
{0x00, 0x04, 0x09, 0x40, 0x00}, /* +2 */
};
#define NUM_CONTRAST_LEVELS (5)
static const uint8_t contrast_regs[NUM_CONTRAST_LEVELS + 1][7] = {
{BPADDR, BPDATA, BPADDR, BPDATA, BPDATA, BPDATA, BPDATA},
{0x00, 0x04, 0x07, 0x20, 0x18, 0x34, 0x06}, /* -2 */
{0x00, 0x04, 0x07, 0x20, 0x1c, 0x2a, 0x06}, /* -1 */
{0x00, 0x04, 0x07, 0x20, 0x20, 0x20, 0x06}, /* 0 */
{0x00, 0x04, 0x07, 0x20, 0x24, 0x16, 0x06}, /* +1 */
{0x00, 0x04, 0x07, 0x20, 0x28, 0x0c, 0x06}, /* +2 */
};
#define NUM_SATURATION_LEVELS (5)
static const uint8_t saturation_regs[NUM_SATURATION_LEVELS + 1][5] = {
{BPADDR, BPDATA, BPADDR, BPDATA, BPDATA},
{0x00, 0x02, 0x03, 0x28, 0x28}, /* -2 */
{0x00, 0x02, 0x03, 0x38, 0x38}, /* -1 */
{0x00, 0x02, 0x03, 0x48, 0x48}, /* 0 */
{0x00, 0x02, 0x03, 0x58, 0x58}, /* +1 */
{0x00, 0x02, 0x03, 0x68, 0x68}, /* +2 */
};
static int reset(sensor_t *sensor)
{
// Reset all registers
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_writeb(sensor->slv_addr, COM7, COM7_SRST);
// Delay 5 ms
systick_sleep(5);
// Write default regsiters
for (int i = 0; default_regs[i][0]; i++) {
ret |= cambus_writeb(sensor->slv_addr, default_regs[i][0], default_regs[i][1]);
}
// Delay 300 ms
systick_sleep(300);
return ret;
}
static int sleep(sensor_t *sensor, int enable)
{
if (enable) {
DCMI_PWDN_HIGH();
systick_sleep(1);
} else {
DCMI_PWDN_LOW();
systick_sleep(1);
}
return 0;
}
static int read_reg(sensor_t *sensor, uint16_t reg_addr)
{
uint8_t reg_data;
if (cambus_readb(sensor->slv_addr, reg_addr, &reg_data) != 0) {
return -1;
}
return reg_data;
}
static int write_reg(sensor_t *sensor, uint16_t reg_addr, uint16_t reg_data)
{
return cambus_writeb(sensor->slv_addr, reg_addr, reg_data);
}
static int set_pixformat(sensor_t *sensor, pixformat_t pixformat)
{
const uint8_t (*regs)[2];
int ret = 0;
switch (pixformat) {
case PIXFORMAT_RGB565:
regs = rgb565_regs;
break;
case PIXFORMAT_YUV422:
case PIXFORMAT_GRAYSCALE:
regs = yuv422_regs;
break;
case PIXFORMAT_BAYER:
regs = bayer_regs;
break;
case PIXFORMAT_JPEG:
regs = jpeg_regs;
break;
default:
return -1;
}
// Write regsiters
for (int i = 0; regs[i][0]; i++) {
ret |= cambus_writeb(sensor->slv_addr, regs[i][0], regs[i][1]);
}
// Delay 300 ms
systick_sleep(300);
return ret;
}
static int set_framesize(sensor_t *sensor, framesize_t framesize)
{
const uint8_t (*regs)[2];
uint16_t sensor_w = 0;
uint16_t sensor_h = 0;
int ret = 0;
uint16_t w = resolution[framesize][0];
uint16_t h = resolution[framesize][1];
if ((w % 4) || (h % 4)) { // w/h must be divisble by 4
return 1;
}
// Looks really bad.
/* if ((w <= CIF_WIDTH) && (h <= CIF_HEIGHT)) {
regs = cif_regs;
sensor_w = CIF_WIDTH;
sensor_h = CIF_HEIGHT;
} else */ if ((w <= SVGA_WIDTH) && (h <= SVGA_HEIGHT)) {
regs = svga_regs;
sensor_w = SVGA_WIDTH;
sensor_h = SVGA_HEIGHT;
} else {
regs = uxga_regs;
sensor_w = UXGA_WIDTH;
sensor_h = UXGA_HEIGHT;
}
// Write setup regsiters
for (int i = 0; regs[i][0]; i++) {
ret |= cambus_writeb(sensor->slv_addr, regs[i][0], regs[i][1]);
}
uint64_t tmp_div = IM_MIN(sensor_w / w, sensor_h / h);
uint16_t log_div = IM_MIN(IM_LOG2(tmp_div) - 1, 3);
uint16_t div = 1 << log_div;
uint16_t w_mul = w * div;
uint16_t h_mul = h * div;
uint16_t x_off = (sensor_w - w_mul) / 2;
uint16_t y_off = (sensor_h - h_mul) / 2;
ret |= cambus_writeb(sensor->slv_addr, CTRLI, CTRLI_LP_DP | CTRLI_V_DIV_SET(log_div) | CTRLI_H_DIV_SET(log_div));
ret |= cambus_writeb(sensor->slv_addr, HSIZE, HSIZE_SET(w_mul));
ret |= cambus_writeb(sensor->slv_addr, VSIZE, VSIZE_SET(h_mul));
ret |= cambus_writeb(sensor->slv_addr, XOFFL, XOFFL_SET(x_off));
ret |= cambus_writeb(sensor->slv_addr, YOFFL, YOFFL_SET(y_off));
ret |= cambus_writeb(sensor->slv_addr, VHYX, VHYX_HSIZE_SET(w_mul) | VHYX_VSIZE_SET(h_mul) | VHYX_XOFF_SET(x_off) | VHYX_YOFF_SET(y_off));
ret |= cambus_writeb(sensor->slv_addr, TEST, TEST_HSIZE_SET(w_mul));
ret |= cambus_writeb(sensor->slv_addr, ZMOW, ZMOW_OUTW_SET(w));
ret |= cambus_writeb(sensor->slv_addr, ZMOH, ZMOH_OUTH_SET(h));
ret |= cambus_writeb(sensor->slv_addr, ZMHH, ZMHH_OUTW_SET(w) | ZMHH_OUTH_SET(h));
ret |= cambus_writeb(sensor->slv_addr, R_DVP_SP, div);
ret |= cambus_writeb(sensor->slv_addr, RESET, 0x00);
// Delay 300 ms
systick_sleep(300);
return ret;
}
static int set_framerate(sensor_t *sensor, framerate_t framerate)
{
return 0;
}
static int set_contrast(sensor_t *sensor, int level)
{
int ret=0;
level += (NUM_CONTRAST_LEVELS / 2) + 1;
if (level < 0 || level > NUM_CONTRAST_LEVELS) {
return -1;
}
/* Switch to DSP register bank */
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
/* Write contrast registers */
for (int i=0; i<sizeof(contrast_regs[0])/sizeof(contrast_regs[0][0]); i++) {
ret |= cambus_writeb(sensor->slv_addr, contrast_regs[0][i], contrast_regs[level][i]);
}
return ret;
}
static int set_brightness(sensor_t *sensor, int level)
{
int ret=0;
level += (NUM_BRIGHTNESS_LEVELS / 2) + 1;
if (level < 0 || level > NUM_BRIGHTNESS_LEVELS) {
return -1;
}
/* Switch to DSP register bank */
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
/* Write brightness registers */
for (int i=0; i<sizeof(brightness_regs[0])/sizeof(brightness_regs[0][0]); i++) {
ret |= cambus_writeb(sensor->slv_addr, brightness_regs[0][i], brightness_regs[level][i]);
}
return ret;
}
static int set_saturation(sensor_t *sensor, int level)
{
int ret=0;
level += (NUM_SATURATION_LEVELS / 2) + 1;
if (level < 0 || level > NUM_SATURATION_LEVELS) {
return -1;
}
/* Switch to DSP register bank */
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
/* Write saturation registers */
for (int i=0; i<sizeof(saturation_regs[0])/sizeof(saturation_regs[0][0]); i++) {
ret |= cambus_writeb(sensor->slv_addr, saturation_regs[0][i], saturation_regs[level][i]);
}
return ret;
}
static int set_gainceiling(sensor_t *sensor, gainceiling_t gainceiling)
{
int ret=0;
/* Switch to SENSOR register bank */
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
/* Write gain ceiling register */
ret |= cambus_writeb(sensor->slv_addr, COM9, COM9_AGC_SET(gainceiling));
return ret;
}
static int set_quality(sensor_t *sensor, int qs)
{
int ret=0;
/* Switch to DSP register bank */
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
/* Write QS register */
ret |= cambus_writeb(sensor->slv_addr, QS, qs);
return ret;
}
static int set_colorbar(sensor_t *sensor, int enable)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM7, &reg);
if (enable) {
reg |= COM7_COLOR_BAR;
} else {
reg &= ~COM7_COLOR_BAR;
}
return cambus_writeb(sensor->slv_addr, COM7, reg) | ret;
}
static int set_auto_gain(sensor_t *sensor, int enable, float gain_db, float gain_db_ceiling)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM8, &reg);
ret |= cambus_writeb(sensor->slv_addr, COM8, (reg & (~COM8_AGC_EN)) | ((enable != 0) ? COM8_AGC_EN : 0));
if ((enable == 0) && (!isnanf(gain_db)) && (!isinff(gain_db))) {
float gain = IM_MAX(IM_MIN(fast_expf((gain_db / 20.0) * fast_log(10.0)), 32.0), 1.0);
int gain_temp = fast_roundf(fast_log2(IM_MAX(gain / 2.0, 1.0)));
int gain_hi = 0xF >> (4 - gain_temp);
int gain_lo = IM_MIN(fast_roundf(((gain / (1 << gain_temp)) - 1.0) * 16.0), 15);
ret |= cambus_writeb(sensor->slv_addr, GAIN, (gain_hi << 4) | (gain_lo << 0));
} else if ((enable != 0) && (!isnanf(gain_db_ceiling)) && (!isinff(gain_db_ceiling))) {
float gain_ceiling = IM_MAX(IM_MIN(fast_expf((gain_db_ceiling / 20.0) * fast_log(10.0)), 128.0), 2.0);
ret |= cambus_readb(sensor->slv_addr, COM9, &reg);
ret |= cambus_writeb(sensor->slv_addr, COM9, (reg & 0x1F) | ((fast_ceilf(fast_log2(gain_ceiling)) - 1) << 5));
}
return ret;
}
static int get_gain_db(sensor_t *sensor, float *gain_db)
{
uint8_t reg, gain;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM8, &reg);
// DISABLED
// if (reg & COM8_AGC_EN) {
// ret |= cambus_writeb(sensor->slv_addr, COM8, reg & (~COM8_AGC_EN));
// }
// DISABLED
ret |= cambus_readb(sensor->slv_addr, GAIN, &gain);
// DISABLED
// if (reg & COM8_AGC_EN) {
// ret |= cambus_writeb(sensor->slv_addr, COM8, reg | COM8_AGC_EN);
// }
// DISABLED
int hi_gain = 1 << (((gain >> 7) & 1) + ((gain >> 6) & 1) + ((gain >> 5) & 1) + ((gain >> 4) & 1));
float lo_gain = 1.0 + (((gain >> 0) & 0xF) / 16.0);
*gain_db = 20.0 * (fast_log(hi_gain * lo_gain) / fast_log(10.0));
return ret;
}
static int set_auto_exposure(sensor_t *sensor, int enable, int exposure_us)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM8, &reg);
ret |= cambus_writeb(sensor->slv_addr, COM8, COM8_SET_AEC(reg, (enable != 0)));
if ((enable == 0) && (exposure_us >= 0)) {
ret |= cambus_readb(sensor->slv_addr, COM7, &reg);
int t_line = 0;
if (COM7_GET_RES(reg) == COM7_RES_UXGA) t_line = 1600 + 322;
if (COM7_GET_RES(reg) == COM7_RES_SVGA) t_line = 800 + 390;
if (COM7_GET_RES(reg) == COM7_RES_CIF) t_line = 400 + 195;
ret |= cambus_readb(sensor->slv_addr, CLKRC, &reg);
int pll_mult = ((reg & CLKRC_DOUBLE) ? 2 : 1) * 3;
int clk_rc = (reg & CLKRC_DIVIDER_MASK) + 2;
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_readb(sensor->slv_addr, IMAGE_MODE, &reg);
int t_pclk = 0;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_YUV422) t_pclk = 2;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_RAW10) t_pclk = 1;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_RGB565) t_pclk = 2;
int exposure = IM_MAX(IM_MIN(((exposure_us*(((OMV_XCLK_FREQUENCY/clk_rc)*pll_mult)/1000000))/t_pclk)/t_line,0xFFFF),0x0000);
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, REG04, &reg);
ret |= cambus_writeb(sensor->slv_addr, REG04, (reg & 0xFC) | ((exposure >> 0) & 0x3));
ret |= cambus_readb(sensor->slv_addr, AEC, &reg);
ret |= cambus_writeb(sensor->slv_addr, AEC, (reg & 0x00) | ((exposure >> 2) & 0xFF));
ret |= cambus_readb(sensor->slv_addr, REG45, &reg);
ret |= cambus_writeb(sensor->slv_addr, REG45, (reg & 0xC0) | ((exposure >> 10) & 0x3F));
}
return ret;
}
static int get_exposure_us(sensor_t *sensor, int *exposure_us)
{
uint8_t reg, aec_10, aec_92, aec_1510;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, COM8, &reg);
// DISABLED
// if (reg & COM8_AEC_EN) {
// ret |= cambus_writeb(sensor->slv_addr, COM8, reg & (~COM8_AEC_EN));
// }
// DISABLED
ret |= cambus_readb(sensor->slv_addr, REG04, &aec_10);
ret |= cambus_readb(sensor->slv_addr, AEC, &aec_92);
ret |= cambus_readb(sensor->slv_addr, REG45, &aec_1510);
// DISABLED
// if (reg & COM8_AEC_EN) {
// ret |= cambus_writeb(sensor->slv_addr, COM8, reg | COM8_AEC_EN);
// }
// DISABLED
ret |= cambus_readb(sensor->slv_addr, COM7, &reg);
int t_line = 0;
if (COM7_GET_RES(reg) == COM7_RES_UXGA) t_line = 1600 + 322;
if (COM7_GET_RES(reg) == COM7_RES_SVGA) t_line = 800 + 390;
if (COM7_GET_RES(reg) == COM7_RES_CIF) t_line = 400 + 195;
ret |= cambus_readb(sensor->slv_addr, CLKRC, &reg);
int pll_mult = ((reg & CLKRC_DOUBLE) ? 2 : 1) * 3;
int clk_rc = (reg & CLKRC_DIVIDER_MASK) + 2;
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_readb(sensor->slv_addr, IMAGE_MODE, &reg);
int t_pclk = 0;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_YUV422) t_pclk = 2;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_RAW10) t_pclk = 1;
if (IMAGE_MODE_GET_FMT(reg) == IMAGE_MODE_RGB565) t_pclk = 2;
uint16_t exposure = ((aec_1510 & 0x3F) << 10) + ((aec_92 & 0xFF) << 2) + ((aec_10 & 0x3) << 0);
*exposure_us = (exposure*t_line*t_pclk)/(((OMV_XCLK_FREQUENCY/clk_rc)*pll_mult)/1000000);
return ret;
}
static int set_auto_whitebal(sensor_t *sensor, int enable, float r_gain_db, float g_gain_db, float b_gain_db)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_readb(sensor->slv_addr, CTRL1, &reg);
ret |= cambus_writeb(sensor->slv_addr, CTRL1, (reg & (~CTRL1_AWB)) | ((enable != 0) ? CTRL1_AWB : 0));
if ((enable == 0) && (!isnanf(r_gain_db)) && (!isnanf(g_gain_db)) && (!isnanf(b_gain_db))
&& (!isinff(r_gain_db)) && (!isinff(g_gain_db)) && (!isinff(b_gain_db))) {
}
return ret;
}
static int get_rgb_gain_db(sensor_t *sensor, float *r_gain_db, float *g_gain_db, float *b_gain_db)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_readb(sensor->slv_addr, CTRL1, &reg);
// DISABLED
// if (reg & CTRL1_AWB) {
// ret |= cambus_writeb(sensor->slv_addr, CTRL1, reg & (~CTRL1_AWB));
// }
// DISABLED
// DISABLED
// if (reg & CTRL1_AWB) {
// ret |= cambus_writeb(sensor->slv_addr, CTRL1, reg | CTRL1_AWB);
// }
// DISABLED
*r_gain_db = NAN;
*g_gain_db = NAN;
*b_gain_db = NAN;
return ret;
}
static int set_hmirror(sensor_t *sensor, int enable)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, REG04, &reg);
if (!enable) { // Already mirrored.
reg |= REG04_HFLIP_IMG;
} else {
reg &= ~REG04_HFLIP_IMG;
}
return cambus_writeb(sensor->slv_addr, REG04, reg) | ret;
}
static int set_vflip(sensor_t *sensor, int enable)
{
uint8_t reg;
int ret = cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
ret |= cambus_readb(sensor->slv_addr, REG04, &reg);
if (!enable) { // Already flipped.
reg |= REG04_VFLIP_IMG | REG04_VREF_EN;
} else {
reg &= ~(REG04_VFLIP_IMG | REG04_VREF_EN);
}
return cambus_writeb(sensor->slv_addr, REG04, reg) | ret;
}
static int set_special_effect(sensor_t *sensor, sde_t sde)
{
int ret=0;
switch (sde) {
case SDE_NEGATIVE:
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_writeb(sensor->slv_addr, BPADDR, 0x00);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x40);
ret |= cambus_writeb(sensor->slv_addr, BPADDR, 0x05);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x80);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x80);
break;
case SDE_NORMAL:
ret |= cambus_writeb(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
ret |= cambus_writeb(sensor->slv_addr, BPADDR, 0x00);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x00);
ret |= cambus_writeb(sensor->slv_addr, BPADDR, 0x05);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x80);
ret |= cambus_writeb(sensor->slv_addr, BPDATA, 0x80);
break;
default:
return -1;
}
return ret;
}
int ov2640_init(sensor_t *sensor)
{
// Initialize sensor structure.
sensor->gs_bpp = 2;
sensor->reset = reset;
sensor->sleep = sleep;
sensor->read_reg = read_reg;
sensor->write_reg = write_reg;
sensor->set_pixformat = set_pixformat;
sensor->set_framesize = set_framesize;
sensor->set_framerate = set_framerate;
sensor->set_contrast = set_contrast;
sensor->set_brightness = set_brightness;
sensor->set_saturation = set_saturation;
sensor->set_gainceiling = set_gainceiling;
sensor->set_quality = set_quality;
sensor->set_colorbar = set_colorbar;
sensor->set_auto_gain = set_auto_gain;
sensor->get_gain_db = get_gain_db;
sensor->set_auto_exposure = set_auto_exposure;
sensor->get_exposure_us = get_exposure_us;
sensor->set_auto_whitebal = set_auto_whitebal;
sensor->get_rgb_gain_db = get_rgb_gain_db;
sensor->set_hmirror = set_hmirror;
sensor->set_vflip = set_vflip;
sensor->set_special_effect = set_special_effect;
// Set sensor flags
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_VSYNC, 0);
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_HSYNC, 0);
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_PIXCK, 1);
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_FSYNC, 0);
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_JPEGE, 1);
return 0;
}
You can’t perform that action at this time.