Thread 中讨论的其他器件:AM67、AM67A 、 ALP
工具/软件:
尊敬的 TI:
我们有 TDA4VEN - DS90UB960 - IMX390 (内置 DS90UB953)、并设置器件树继电器。 现在、我们要使用以下代码测试传感器的通电和工作是否正常:
# after boot and login, config code provided by manutacturer $ i2cset -y 7 0x3d 0x4c 0x01 $ i2cset -y 7 0x3d 0x58 0x5e $ i2cset -y 7 0x3d 0x1f 0x02 $ i2cset -y 7 0x3d 0x20 0x20 $ i2cset -y 7 0x3d 0x33 0x03
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
#include <string.h>
#include <errno.h>
#define DEVICE "/dev/video4"
#define WIDTH 1936
#define HEIGHT 1100
int main() {
int fd = open(DEVICE, O_RDWR);
if (fd == -1) {
perror("Error opening video device");
return 1;
}
// Set video format
struct v4l2_format fmt;
memset(&fmt, 0, sizeof(fmt));
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = WIDTH;
fmt.fmt.pix.height = HEIGHT;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SRGGB12; // 10-bit Bayer Packed
fmt.fmt.pix.field = V4L2_FIELD_NONE;
if (ioctl(fd, VIDIOC_S_FMT, &fmt) == -1) {
perror("VIDIOC_S_FMT failed");
printf("Error: %d\n", errno);
close(fd);
return 1;
}
// Request buffers
struct v4l2_requestbuffers req;
memset(&req, 0, sizeof(req));
req.count = 1; // Request 1 buffer
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
if (ioctl(fd, VIDIOC_REQBUFS, &req) == -1) {
perror("VIDIOC_REQBUFS failed");
close(fd);
return 1;
}
// Query buffer
struct v4l2_buffer buf;
memset(&buf, 0, sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = 0;
if (ioctl(fd, VIDIOC_QUERYBUF, &buf) == -1) {
perror("VIDIOC_QUERYBUF failed");
close(fd);
return 1;
}
// Map buffer to user space
void* buffer = mmap(NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
if (buffer == MAP_FAILED) {
perror("Memory mapping failed");
close(fd);
return 1;
}
// Queue buffer
if (ioctl(fd, VIDIOC_QBUF, &buf) == -1) {
perror("VIDIOC_QBUF failed");
close(fd);
return 1;
}
// Start streaming
int type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ioctl(fd, VIDIOC_STREAMON, &type) == -1) {
perror("VIDIOC_STREAMON failed");
close(fd);
return 1;
}
// Dequeue buffer (capture frame)
if (ioctl(fd, VIDIOC_DQBUF, &buf) == -1) {
perror("VIDIOC_DQBUF failed");
close(fd);
return 1;
}
// Save raw Bayer frame
FILE* file = fopen("frame.raw", "wb");
if (file) {
fwrite(buffer, buf.length, 1, file);
fclose(file);
printf("Frame captured and saved as frame.raw\n");
} else {
perror("Error saving frame");
}
// Stop streaming
if (ioctl(fd, VIDIOC_STREAMOFF, &type) == -1) {
perror("VIDIOC_STREAMOFF failed");
}
// Cleanup
munmap(buffer, buf.length);
close(fd);
return 0;
}
执行在第88行挂起、如果我们使用 ctrl + c 中断并检查954的0x20和0x33寄存器、则该值分别修改回0xf0和0x02。 在执行第81行之后、这些值似乎被修改了。
我们还尝试了`v4l2-ctl --device /dev/video4 --stream-mmap --stream-count=1 --stream-to=frame.raw`并将其挂起。
此致

