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rt-thread-official/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_ov2640.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-03 thread-liu the first version
*/
#include "board.h"
#if defined(BSP_USING_OV2640)
#include <dfs_file.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <drv_ov2640.h>
#include <drv_dcmi.h>
#include "pcf8574.h"
#define DRV_DEBUG
//#define CAMERA_DUMP
#define LOG_TAG "drv.ov2640"
#include <drv_log.h>
#define DEV_ADDRESS 0x30 /* OV2640 address */
#define I2C_NAME "i2c2"
#define RESET_PIN GET_PIN(A, 15) /* camera reset pin */
/* camera PWDN pin */
#define DCMI_PWDN_IO 2 /* pcf8574 (0-7) */
volatile rt_uint32_t jpeg_data_len = 0;
volatile rt_uint8_t jpeg_data_ok = 0;
struct rt_i2c_bus_device *i2c_bus = RT_NULL;
#define JPEG_BUF_SIZE 32 * 1024
#define JPEG_LINE_SIZE 1 * 1024
static pcf8574_device_t pcf_dev = RT_NULL;
static rt_uint32_t *jpeg_data_buf = RT_NULL;
static rt_uint32_t JPEG_LINE0_BUF[JPEG_LINE_SIZE];
static rt_uint32_t JPEG_LINE1_BUF[JPEG_LINE_SIZE];
#if defined(CAMERA_DUMP)
#define __is_print(ch) ((unsigned int)((ch) - ' ') < 127u - ' ')
static void dump_hex(const rt_uint8_t *ptr, rt_size_t buflen)
{
unsigned char *buf = (unsigned char *)ptr;
int i, j;
for (i = 0; i < buflen; i += 16)
{
rt_kprintf("%08x:", i);
for (j = 0; j < 16; j++)
{
if (i + j < buflen)
{
rt_kprintf("%02x", buf[i + j]);
}
else
{
rt_kprintf(" ");
}
}
rt_kprintf(" ");
for (j = 0; j < 16; j++)
{
if (i + j < buflen)
{
rt_kprintf("%c", __is_print(buf[i + j]) ? buf[i + j] : '.');
}
}
rt_kprintf("\n");
}
}
#endif
static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t len, rt_uint8_t *buf)
{
struct rt_i2c_msg msg[2];
RT_ASSERT(bus != RT_NULL);
msg[0].addr = DEV_ADDRESS;
msg[0].flags = RT_I2C_WR;
msg[0].buf = &reg;
msg[0].len = 2;
msg[1].addr = DEV_ADDRESS;
msg[1].flags = RT_I2C_RD;
msg[1].len = len;
msg[1].buf = buf;
if (rt_i2c_transfer(bus, msg, 2) == 2)
{
return RT_EOK;
}
return -RT_ERROR;
}
/* i2c write reg */
static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t data)
{
rt_uint8_t buf[2];
struct rt_i2c_msg msgs;
RT_ASSERT(bus != RT_NULL);
buf[0] = reg ;
buf[1] = data;
msgs.addr = DEV_ADDRESS;
msgs.flags = RT_I2C_WR;
msgs.buf = buf;
msgs.len = 2;
if (rt_i2c_transfer(bus, &msgs, 1) == 1)
{
return RT_EOK;
}
return -RT_ERROR;
}
static rt_err_t ov2640_read_id(struct rt_i2c_bus_device *bus)
{
rt_uint8_t read_value[2];
rt_uint16_t id = 0;
read_reg(bus, OV2640_SENSOR_MIDH, 1, &read_value[0]);
read_reg(bus, OV2640_SENSOR_MIDL, 1, &read_value[1]);
id = ((rt_uint16_t)(read_value[0] << 8) & 0xFF00);
id |= ((rt_uint16_t)(read_value[1]) & 0x00FF);
if (id != OV2640_MID)
{
LOG_E("ov2640 init error, mid: 0x%04x", id);
return -RT_ERROR;
}
LOG_I("ov2640 read mid success, mid: 0x%04x", id);
read_reg(bus, OV2640_SENSOR_PIDH, 1, &read_value[0]);
read_reg(bus, OV2640_SENSOR_PIDL, 1, &read_value[1]);
id = ((rt_uint16_t)(read_value[0] << 8) & 0xFF00);
id |= ((rt_uint16_t)(read_value[1]) & 0x00FF);
if (id != OV2640_PID)
{
LOG_E("ov2640 init error, pid: 0x%04x", id);
return -RT_ERROR;
}
LOG_I("ov2640 read hid success, pid: 0x%04x", id);
return RT_EOK;
}
/* change ov2640 to jpeg mode */
void ov2640_jpeg_mode(void)
{
rt_uint16_t i=0;
/* set yun422 mode */
for (i = 0; i < (sizeof(ov2640_yuv422_reg_tbl) / 2); i++)
{
write_reg(i2c_bus, ov2640_yuv422_reg_tbl[i][0],ov2640_yuv422_reg_tbl[i][1]);
}
/* set jpeg mode */
for(i=0;i<(sizeof(ov2640_jpeg_reg_tbl)/2);i++)
{
write_reg(i2c_bus, ov2640_jpeg_reg_tbl[i][0],ov2640_jpeg_reg_tbl[i][1]);
}
}
/* change ov2640 to rgb565 mode */
void ov2640_rgb565_mode(void)
{
rt_uint16_t i=0;
for (i = 0; i < (sizeof(ov2640_rgb565_reg_tbl) / 2); i++)
{
write_reg(i2c_bus, ov2640_rgb565_reg_tbl[i][0],ov2640_rgb565_reg_tbl[i][1]);
}
}
/* set auto exposure */
void ov2640_set_auto_exposure(rt_uint8_t level)
{
rt_uint8_t i = 0;
rt_uint8_t *p = (rt_uint8_t*)OV2640_AUTOEXPOSURE_LEVEL[level];
for (i = 0; i < 4; i++)
{
write_reg(i2c_bus, p[i*2],p[i*2+1]);
}
}
/* set light mode
* 0: auto
* 1: sunny
* 2: cloudy
* 3: office
* 4: home
* */
void ov2640_set_light_mode(rt_uint8_t mode)
{
rt_uint8_t regccval, regcdval, regceval;
switch(mode)
{
case 0:
write_reg(i2c_bus, 0xFF, 0x00);
write_reg(i2c_bus, 0xC7, 0x10);
return;
case 2:
regccval = 0x65;
regcdval = 0x41;
regceval = 0x4F;
break;
case 3:
regccval = 0x52;
regcdval = 0x41;
regceval = 0x66;
break;
case 4:
regccval = 0x42;
regcdval = 0x3F;
regceval = 0x71;
break;
default:
regccval = 0x5E;
regcdval = 0x41;
regceval = 0x54;
break;
}
write_reg(i2c_bus, 0xFF, 0x00);
write_reg(i2c_bus, 0xC7, 0x40);
write_reg(i2c_bus, 0xCC, regccval);
write_reg(i2c_bus, 0xCD, regcdval);
write_reg(i2c_bus, 0xCE, regceval);
}
/* set color saturation
* 0: -2
* 1: -1
* 2: 0
* 3: +1
* 4: +2
* */
void ov2640_set_color_saturation(rt_uint8_t sat)
{
rt_uint8_t reg7dval = ((sat+2)<<4) | 0x08;
write_reg(i2c_bus, 0xFF, 0X00);
write_reg(i2c_bus, 0x7C, 0X00);
write_reg(i2c_bus, 0x7D, 0X02);
write_reg(i2c_bus, 0x7C, 0X03);
write_reg(i2c_bus, 0x7D, reg7dval);
write_reg(i2c_bus, 0x7D, reg7dval);
}
/* set brightness
* 0: -2
* 1: -1
* 2: 0
* 3: 1
* 4: 2
* */
void ov2640_set_brightness(rt_uint8_t bright)
{
write_reg(i2c_bus, 0xff, 0x00);
write_reg(i2c_bus, 0x7c, 0x00);
write_reg(i2c_bus, 0x7d, 0x04);
write_reg(i2c_bus, 0x7c, 0x09);
write_reg(i2c_bus, 0x7d, bright << 4);
write_reg(i2c_bus, 0x7d, 0x00);
}
/* set contrast
* 0: -2
* 1: -1
* 2: 0
* 3: 1
* 4: 2
* */
void ov2640_set_contrast(rt_uint8_t contrast)
{
rt_uint8_t reg7d0val, reg7d1val;
switch(contrast)
{
case 0:
reg7d0val = 0x18;
reg7d1val = 0x34;
break;
case 1:
reg7d0val = 0x1C;
reg7d1val = 0x2A;
break;
case 3:
reg7d0val = 0x24;
reg7d1val = 0x16;
break;
case 4:
reg7d0val = 0x28;
reg7d1val = 0x0C;
break;
default:
reg7d0val = 0x20;
reg7d1val = 0x20;
break;
}
write_reg(i2c_bus, 0xff, 0x00);
write_reg(i2c_bus, 0x7c, 0x00);
write_reg(i2c_bus, 0x7d, 0x04);
write_reg(i2c_bus, 0x7c, 0x07);
write_reg(i2c_bus, 0x7d, 0x20);
write_reg(i2c_bus, 0x7d, reg7d0val);
write_reg(i2c_bus, 0x7d, reg7d1val);
write_reg(i2c_bus, 0x7d, 0x06);
}
/* set special effects
* 0: noraml
* 1: negative film
* 2: black-and-white
* 3: the red
* 4: the green
* 5: the blue
* 6: Retro
*/
void ov2640_set_special_effects(rt_uint8_t eft)
{
rt_uint8_t reg7d0val, reg7d1val, reg7d2val;
switch(eft)
{
case 1:
reg7d0val = 0x40;
break;
case 2:
reg7d0val = 0x18;
break;
case 3:
reg7d0val = 0x18;
reg7d1val = 0x40;
reg7d2val = 0xC0;
break;
case 4:
reg7d0val = 0x18;
reg7d1val = 0x40;
reg7d2val = 0x40;
break;
case 5:
reg7d0val = 0x18;
reg7d1val = 0xA0;
reg7d2val = 0x40;
break;
case 6:
reg7d0val = 0x18;
reg7d1val = 0x40;
reg7d2val = 0xA6;
break;
default:
reg7d0val = 0x00;
reg7d1val = 0x80;
reg7d2val = 0x80;
break;
}
write_reg(i2c_bus, 0xff, 0x00);
write_reg(i2c_bus, 0x7c, 0x00);
write_reg(i2c_bus, 0x7d, reg7d0val);
write_reg(i2c_bus, 0x7c, 0x05);
write_reg(i2c_bus, 0x7d, reg7d1val);
write_reg(i2c_bus, 0x7d, reg7d2val);
}
/* set the image output window */
void ov2640_set_window_size(rt_uint16_t sx,rt_uint16_t sy,rt_uint16_t width,rt_uint16_t height)
{
rt_uint16_t endx;
rt_uint16_t endy;
rt_uint8_t temp;
endx = sx + width / 2;
endy = sy + height / 2;
write_reg(i2c_bus, 0xFF, 0x01);
read_reg(i2c_bus, 0x03, 1, &temp);
temp &= 0xF0;
temp |= ((endy & 0x03) << 2) | (sy & 0x03);
write_reg(i2c_bus, 0x03, temp);
write_reg(i2c_bus, 0x19, sy>>2);
write_reg(i2c_bus, 0x1A, endy>>2);
read_reg(i2c_bus, 0x32, 1, &temp);
temp &= 0xC0;
temp |= ((endx & 0x07) << 3) | (sx & 0x07);
write_reg(i2c_bus, 0x32, temp);
write_reg(i2c_bus, 0x17, sx>>3);
write_reg(i2c_bus, 0x18, endx>>3);
}
/* set the image output size */
rt_uint8_t ov2640_set_image_out_size(rt_uint16_t width,rt_uint16_t height)
{
rt_uint16_t outh, outw;
rt_uint8_t temp;
if(width%4)return 1;
if(height%4)return 2;
outw = width / 4;
outh = height / 4;
write_reg(i2c_bus, 0xFF, 0x00);
write_reg(i2c_bus, 0xE0, 0x04);
write_reg(i2c_bus, 0x5A, outw & 0XFF);
write_reg(i2c_bus, 0x5B, outh & 0XFF);
temp = (outw >> 8) & 0x03;
temp |= (outh >> 6) & 0x04;
write_reg(i2c_bus, 0x5C, temp);
write_reg(i2c_bus, 0xE0, 0X00);
return RT_EOK;
}
/* set the image window size */
rt_err_t ov2640_set_image_window_size(rt_uint16_t offx, rt_uint16_t offy, rt_uint16_t width, rt_uint16_t height)
{
rt_uint16_t hsize, vsize;
rt_uint8_t temp;
if ((width % 4) || (height%4))
{
return -RT_ERROR;
}
hsize = width / 4;
vsize = height / 4;
write_reg(i2c_bus, 0XFF,0X00);
write_reg(i2c_bus, 0XE0,0X04);
write_reg(i2c_bus, 0X51,hsize&0XFF);
write_reg(i2c_bus, 0X52,vsize&0XFF);
write_reg(i2c_bus, 0X53,offx&0XFF);
write_reg(i2c_bus, 0X54,offy&0XFF);
temp=(vsize>>1)&0X80;
temp|=(offy>>4)&0X70;
temp|=(hsize>>5)&0X08;
temp|=(offx>>8)&0X07;
write_reg(i2c_bus, 0X55,temp);
write_reg(i2c_bus, 0X57,(hsize>>2)&0X80);
write_reg(i2c_bus, 0XE0,0X00);
return RT_EOK;
}
/* set output resolution */
rt_uint8_t ov2640_set_image_size(rt_uint16_t width ,rt_uint16_t height)
{
rt_uint8_t temp;
write_reg(i2c_bus, 0xFF, 0x00);
write_reg(i2c_bus, 0xE0, 0x04);
write_reg(i2c_bus, 0xC0, (width >>3) & 0xFF);
write_reg(i2c_bus, 0xC1, (height >> 3) & 0xFF);
temp = (width & 0x07) << 3;
temp |= height & 0x07;
temp |= (width >> 4) & 0x80;
write_reg(i2c_bus, 0x8C, temp);
write_reg(i2c_bus, 0xE0, 0x00);
return RT_EOK;
}
void camera_dma_data_process(void)
{
rt_uint16_t i;
rt_uint32_t *pbuf;
pbuf = jpeg_data_buf + jpeg_data_len;
if (DMA2_Stream1->CR & (1<<19))
{
for (i = 0; i < JPEG_LINE_SIZE; i++)
{
pbuf[i] = JPEG_LINE0_BUF[i];
}
jpeg_data_len += JPEG_LINE_SIZE;
}
else
{
for (i = 0; i < JPEG_LINE_SIZE; i++)
{
pbuf[i] = JPEG_LINE1_BUF[i];
}
jpeg_data_len += JPEG_LINE_SIZE;
}
SCB_CleanInvalidateDCache();
}
/* After a frame of picture data has been collected. */
void camera_frame_data_process(void)
{
rt_uint16_t i, rlen;
rt_uint32_t *pbuf = RT_NULL;
if (jpeg_data_ok == 0)
{
DMA2_Stream1->CR &= ~(1<<0);
while(DMA2_Stream1->CR & 0x01);
rlen = JPEG_LINE_SIZE - DMA2_Stream1->NDTR;
pbuf = jpeg_data_buf + jpeg_data_len;
if (DMA2_Stream1->CR & (1<<19))
{
for (i = 0; i < rlen; i++)
{
pbuf[i] = JPEG_LINE1_BUF[i];
}
}
else
{
for (i = 0; i < rlen; i++)
{
pbuf[i] = JPEG_LINE0_BUF[i];
}
}
jpeg_data_len += rlen;
jpeg_data_ok = 1;
}
if (jpeg_data_ok==2)
{
DMA2_Stream1->NDTR = JPEG_LINE_SIZE;
DMA2_Stream1->CR |= 1<<0;
jpeg_data_ok = 0;
jpeg_data_len = 0;
}
}
int ov2640_pwdn_set(rt_uint8_t sta)
{
if (pcf_dev == RT_NULL)
{
LOG_E("can't find pcf8574 device!");
return -1;
}
pcf8574_pin_write(pcf_dev, DCMI_PWDN_IO, sta);
return 0;
}
void sw_ov2640_mode(void)
{
GPIO_InitTypeDef GPIO_Initure = {0};
ov2640_pwdn_set(0);
GPIO_Initure.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_11;
GPIO_Initure.Mode = GPIO_MODE_AF_PP;
GPIO_Initure.Pull = GPIO_PULLUP;
GPIO_Initure.Speed = GPIO_SPEED_HIGH;
GPIO_Initure.Alternate = GPIO_AF13_DCMI;
HAL_GPIO_Init(GPIOC,&GPIO_Initure);
}
void sw_sdcard_mode(void)
{
GPIO_InitTypeDef GPIO_Initure = {0};
ov2640_pwdn_set(1); /* OV2640 Power Down */
GPIO_Initure.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_11;
GPIO_Initure.Mode = GPIO_MODE_AF_PP;
GPIO_Initure.Pull = GPIO_PULLUP;
GPIO_Initure.Speed = GPIO_SPEED_HIGH;
GPIO_Initure.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(GPIOC, &GPIO_Initure);
}
int rt_ov2640_init(void)
{
rt_uint16_t i = 0;
rt_err_t result = RT_EOK;
rt_device_t dcmi_dev = RT_NULL;
sw_ov2640_mode();
pcf_dev = pcf8574_init("i2c1", RT_NULL);
if (pcf_dev == RT_NULL)
{
LOG_E("can't find pcf8574, please check it");
return -RT_ERROR;
}
ov2640_pwdn_set(0);
rt_thread_delay(20);
/* ov2640 hard reset */
rt_pin_mode(RESET_PIN, PIN_MODE_OUTPUT);
rt_pin_write(RESET_PIN, PIN_LOW);
rt_thread_delay(20);
rt_pin_write(RESET_PIN, PIN_HIGH);
rt_thread_delay(20);
i2c_bus = rt_i2c_bus_device_find(I2C_NAME);
if (i2c_bus == RT_NULL)
{
LOG_E("can't find %s deivce", I2C_NAME);
return -RT_ERROR;
}
/* Prepare the camera to be configured */
result = write_reg(i2c_bus, OV2640_DSP_RA_DLMT, 0x01);
if (result != RT_EOK )
{
LOG_E("ov2640 write reg error!");
return -RT_ERROR;
}
rt_thread_delay(10);
result = write_reg(i2c_bus, OV2640_SENSOR_COM7, 0x80);
if (result != RT_EOK)
{
LOG_E("ov2640 soft reset error!");
return -RT_ERROR;
}
rt_thread_delay(20);
result = ov2640_read_id(i2c_bus);
if (result != RT_EOK )
{
LOG_E("ov2640 read id error!");
return -RT_ERROR;
}
for (i = 0; i < sizeof(ov2640_svga_init_reg_tbl) / 2; i++)
{
write_reg(i2c_bus, ov2640_svga_init_reg_tbl[i][0], ov2640_svga_init_reg_tbl[i][1]);
}
ov2640_rgb565_mode();
ov2640_set_light_mode(0);
ov2640_set_color_saturation(3);
ov2640_set_brightness(4);
ov2640_set_contrast(3);
ov2640_jpeg_mode();
ov2640_set_image_window_size(0, 0, 320, 240);
ov2640_set_image_out_size(320, 240);
dcmi_dev = rt_device_find("dcmi");
if (dcmi_dev == RT_NULL)
{
LOG_E("can't find dcmi device!");
return -RT_ERROR;
}
rt_device_open(dcmi_dev, RT_DEVICE_FLAG_RDWR);
jpeg_data_buf = rt_malloc(JPEG_BUF_SIZE);
if (RT_NULL == jpeg_data_buf)
{
rt_kprintf("jpeg data buf malloc error!\n");
return -RT_ERROR;
}
/* start dcmi capture */
rt_hw_dcmi_dma_config((rt_uint32_t)JPEG_LINE0_BUF, (rt_uint32_t)JPEG_LINE1_BUF, JPEG_LINE_SIZE);
rt_kprintf("camera init success!\n");
return RT_EOK;
}
INIT_APP_EXPORT(rt_ov2640_init);
int camera_sample(int argc, char **argv)
{
rt_err_t result = RT_EOK;
int fd = -1;
rt_uint32_t i, jpg_start, jpg_len;
rt_uint8_t jpg_head = 0;
rt_uint8_t *p = RT_NULL;
if (argc != 2)
{
rt_kprintf("Usage:\n");
rt_kprintf("camera_sample file.jpg\n");
return -1;
}
sw_ov2640_mode();
DCMI_Start();
while (1)
{
while (jpeg_data_ok != 1);
jpeg_data_ok = 2;
while (jpeg_data_ok != 1);
DCMI_Stop();
p = (rt_uint8_t *)jpeg_data_buf;
jpg_len = 0;
jpg_head = 0;
for (i = 0; i < jpeg_data_len * 4; i++)
{
/* jpg head */
if ((p[i] == 0xFF) && (p[i + 1] == 0xD8))
{
jpg_start = i;
jpg_head = 1;
}
/* jpg end */
if ((p[i] == 0xFF) && (p[i + 1] == 0xD9) && jpg_head)
{
jpg_len = i - jpg_start + 2; /* a picture len */
break;
}
}
if (jpg_len)
{
p += jpg_start;
sw_sdcard_mode();
fd = open(argv[1], O_WRONLY | O_CREAT);
if (fd < 0)
{
rt_kprintf("open file for recording failed!\n");
result = -RT_ERROR;
goto _exit;
}
else
{
write(fd, p, jpg_len);
close(fd);
rt_kprintf("%s picture capture complate!\n", argv[1]);
break;
}
}
else
{
rt_kprintf("jpg_len error!\n");
result = -RT_ERROR;
goto _exit;
}
}
_exit:
return result;;
}
MSH_CMD_EXPORT(camera_sample, record picture to a jpg file);
#endif
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