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