esp-who/components/camera/ov2640.c

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2018-10-18 15:52:33 +08:00
/*
* 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.
*
* OV2640 driver.
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "sccb.h"
#include "ov2640.h"
#include "ov2640_regs.h"
#include "ov2640_settings.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 = "ov2640";
#endif
static void write_regs(sensor_t *sensor, const uint8_t (*regs)[2]){
int i=0;
while (regs[i][0]) {
SCCB_Write(sensor->slv_addr, regs[i][0], regs[i][1]);
i++;
}
}
static int write_reg(sensor_t *sensor, uint8_t bank, uint8_t reg, uint8_t value)
{
int ret=0;
/* Switch to the given register bank */
ret |= SCCB_Write(sensor->slv_addr, BANK_SEL, bank);
/* Write the register value */
ret |= SCCB_Write(sensor->slv_addr, reg, value);
return ret;
}
static int write_reg_bits(sensor_t *sensor, uint8_t bank, uint8_t reg, uint8_t mask, int enable)
{
int ret=0;
uint8_t old;
/* Switch to SENSOR register bank */
ret |= SCCB_Write(sensor->slv_addr, BANK_SEL, bank);
/* Update REG04 */
old = SCCB_Read(sensor->slv_addr, reg);
if (enable) {
old |= mask;
} else {
old &= ~mask;
}
ret |= SCCB_Write(sensor->slv_addr, reg, old);
return ret;
}
static int write_level_regs(sensor_t *sensor, const uint8_t** regs, uint8_t num_levels, int level)
{
int ret=0;
level += (num_levels / 2 + 1);
if (level < 0 || level > num_levels) {
return -1;
}
/* Switch to DSP register bank */
ret |= SCCB_Write(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
/* Write contrast registers */
for (int i=0; i<sizeof(regs[0])/sizeof(regs[0][0]); i++) {
ret |= SCCB_Write(sensor->slv_addr, regs[0][i], regs[level][i]);
}
return ret;
}
static int reset(sensor_t *sensor)
{
/* Reset all registers */
SCCB_Write(sensor->slv_addr, BANK_SEL, BANK_SEL_SENSOR);
SCCB_Write(sensor->slv_addr, COM7, COM7_SRST);
/* delay n ms */
vTaskDelay(10 / portTICK_PERIOD_MS);
/* Write initial registers */
write_regs(sensor, ov2640_settings_cif);
return 0;
}
static int set_framesize(sensor_t *sensor, framesize_t framesize)
{
int ret=0;
uint16_t w = resolution[framesize][0];
uint16_t h = resolution[framesize][1];
const uint8_t (*regs)[2];
if (framesize <= FRAMESIZE_CIF) {
regs = ov2640_settings_to_cif;
} else if (framesize <= FRAMESIZE_SVGA) {
regs = ov2640_settings_to_svga;
} else {
regs = ov2640_settings_to_uxga;
}
/* Disable DSP */
//ret |= SCCB_Write(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
//ret |= SCCB_Write(sensor->slv_addr, R_BYPASS, R_BYPASS_DSP_BYPAS);
/* Write DSP input regsiters */
write_regs(sensor, regs);
/* Write output width */
ret |= SCCB_Write(sensor->slv_addr, ZMOW, (w>>2)&0xFF); // OUTW[7:0] (real/4)
ret |= SCCB_Write(sensor->slv_addr, ZMOH, (h>>2)&0xFF); // OUTH[7:0] (real/4)
ret |= SCCB_Write(sensor->slv_addr, ZMHH, ((h>>8)&0x04)|((w>>10)&0x03)); // OUTH[8]/OUTW[9:8]
/* Reset DSP */
ret |= SCCB_Write(sensor->slv_addr, RESET, 0x00);
/* Enable DSP */
//ret |= SCCB_Write(sensor->slv_addr, BANK_SEL, BANK_SEL_DSP);
//ret |= SCCB_Write(sensor->slv_addr, R_BYPASS, R_BYPASS_DSP_EN);
/* delay n ms */
vTaskDelay(10 / portTICK_PERIOD_MS);
return ret;
}
static int set_pixformat(sensor_t *sensor, pixformat_t pixformat)
{
/* read pixel format reg */
switch (pixformat) {
case PIXFORMAT_RGB565:
write_regs(sensor, ov2640_settings_rgb565);
break;
case PIXFORMAT_YUV422:
case PIXFORMAT_GRAYSCALE:
write_regs(sensor, ov2640_settings_yuv422);
break;
case PIXFORMAT_JPEG:
write_regs(sensor, ov2640_settings_jpeg3);
break;
default:
return -1;
}
/* delay n ms */
vTaskDelay(10 / portTICK_PERIOD_MS);
return 0;
}
static int set_contrast(sensor_t *sensor, int level)
{
return write_level_regs(sensor, contrast_regs, NUM_CONTRAST_LEVELS, level);
}
static int set_brightness(sensor_t *sensor, int level)
{
return write_level_regs(sensor, brightness_regs, NUM_BRIGHTNESS_LEVELS, level);
}
static int set_saturation(sensor_t *sensor, int level)
{
return write_level_regs(sensor, saturation_regs, NUM_SATURATION_LEVELS, level);
}
static int set_gainceiling(sensor_t *sensor, gainceiling_t gainceiling)
{
return write_reg(sensor, BANK_SEL_SENSOR, COM9, COM9_AGC_SET(gainceiling));
}
static int set_quality(sensor_t *sensor, int qs)
{
return write_reg(sensor, BANK_SEL_DSP, QS, qs);
}
static int set_colorbar(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_SENSOR, COM7, COM7_COLOR_BAR, enable);
}
static int set_whitebal(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_DSP, CTRL1, CTRL1_AWB, enable);
}
static int set_gain_ctrl(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_SENSOR, COM8, COM8_AGC_EN, enable);
}
static int set_exposure_ctrl(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_SENSOR, COM8, COM8_AEC_EN, enable);
}
static int set_hmirror(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_SENSOR, REG04, REG04_HFLIP_IMG, enable);
}
static int set_vflip(sensor_t *sensor, int enable)
{
return write_reg_bits(sensor, BANK_SEL_SENSOR, REG04, REG04_VFLIP_IMG, enable);
}
static int set_framerate(sensor_t *sensor, framerate_t framerate)
{
return 0;
}
int ov2640_init(sensor_t *sensor)
{
/* set function pointers */
sensor->reset = reset;
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_gain_ctrl = set_gain_ctrl;
sensor->set_exposure_ctrl = set_exposure_ctrl;
sensor->set_whitebal = set_whitebal;
sensor->set_hmirror = set_hmirror;
sensor->set_vflip = set_vflip;
// Set sensor flags
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_VSYNC, 1);
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, 1);
SENSOR_HW_FLAGS_SET(sensor, SENSOR_HW_FLAGS_JPEGE, 0);
return 0;
}