Error 0x3: failed to ioctl

I'm sorry, but without more context it is difficult to provide a specific solution for this error message. Can you please provide more information about where and when this error message appears?

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2-21 17:25:18.572 12142 12142 I CAM_ERR : CAM-EEPROM: cam_eeprom_pkt_parse: 1329 read_eeprom_memory failed 02-21 17:25:18.574 12142 12142 I CAM_ERR : CAM-EEPROM: cam_eeprom_driver_cmd: 1540 Failed in eeprom pkt Parsing 02-21 17:25:18.574 12142 12142 I CAM_ERR : CAM-EEPROM: cam_eeprom_subdev_ioctl: 70 Failed in Driver cmd: -22 02-21 17:25:29.955 12215 12215 I CAM_ERR : CAMERA: cam_ispv4_driver_cmd: 1200 cam_ispv4_turn_on fail 02-21 17:25:33.800 12558 12558 I CAM_ERR : CAM-UTIL: cam_common_register_mini_dump_cb: 238 No free index available 02-21 17:25:34.861 0 0 I [ C2] CAM_ERR: CAM-CCI: cam_cci_irq: 359 Base:ffffffc00df93000, cci: 1, M1_Q1 NACK ERROR: 0x40000000 02-21 17:25:34.861 12558 12558 I CAM_ERR : CAM-CCI: cam_cci_read: 1453 CCI1_I2C_M1_Q1 ERROR with Slave 0xa2 02-21 17:25:34.861 12558 12558 I CAM_ERR : CAM-CCI: cam_cci_read_bytes: 1816 CCI1_I2C_M1 Failed to read rc:-22 02-21 17:25:34.861 12558 12558 I CAM_ERR : CAM-CCI: cam_cci_core_cfg: 2023 rc: -22 02-21 17:25:34.861 12558 12558 I CAM_ERR : CAM-EEPROM: cam_eeprom_read_memory: 114 read failed rc -22 02-21 17:25:34.861 12558 12558 I CAM_ERR : CAM-EEPROM: cam_eeprom_pkt_parse: 1329 read_eeprom_memory failed 02-21 17:25:34.863 12558 12558 I CAM_ERR : CAM-EEPROM: cam_eeprom_driver_cmd: 1540 Failed in eeprom pkt Parsing 02-21 17:25:34.863 12558 12558 I CAM_ERR : CAM-EEPROM: cam_eeprom_subdev_ioctl: 70 Failed in Driver cmd: -22

这段日志显示了一些摄像头相关的错误信息。其中包括CAM-EEPROM的错误，CAM-CCI的错误和CAMERA的错误。这些错误可能与摄像头硬件或驱动程序有关。具体的错误信息包括读取EEPROM内存失败、解析EEPROM数据包失败、CCI通信错误等。这些错误可能导致摄像头无法正常工作。为了解决这些问题，可能需要检查硬件连接、更新驱动程序或联系摄像头供应商获取支持。

#include <stdio.h> #include <linux/types.h> #include <fcntl.h> #include <unistd.h> #include <stdlib.h> #include <sys/types.h> #include <sys/ioctl.h> #include <string.h> #include <linux/i2c.h> #include <linux/i2c-dev.h> #include <stdio.h> #include <stdlib.h> #include <stdint.h> #define DEFAULT_I2C_BUS "/dev/i2c-0" /* PCF8591 应用层测试代码 */ int main(int argc,char **argv) { unsigned char data=0; int fp; float tmp; // tmp=5.34v 0.34 int a; int b; fp=open("/dev/Tiny4412_PCF8591",O_RDWR); if(fp<0) /*判断文件是否打开成功*/ { printf("PCF8591 driver open error!\n"); return -1; } while(1) { read(fp,&data,1); write(fp,&data,1); printf("ADC1=%d\n",data); tmp=(float)data*(5.0/255); //电压= 采集的数字量*(参考电压/分辨率); a=tmp; //a=5 tmp=5.3 b=(int)((tmp-a)*1000); //b=0.34 printf("ADC1=%d.%dV\r\n",(int)a,(int)b); sleep(1); } close(fp); return 0; }优化这段代码使其从PCF8591默认地址0x48里读取数据并输出数据

您好！根据您的要求，我帮您优化了代码，使其从PCF8591默认地址0x48中读取数据并输出。

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>

#define DEFAULT_I2C_BUS "/dev/i2c-0"
#define PCF8591_ADDRESS 0x48

int main(int argc, char **argv)
{
    int fp;
    unsigned char data = 0;

    fp = open(DEFAULT_I2C_BUS, O_RDWR);
    if (fp < 0) {
        printf("Failed to open I2C bus.\n");
        return -1;
    }

    if (ioctl(fp, I2C_SLAVE, PCF8591_ADDRESS) < 0) {
        printf("Failed to set I2C slave address.\n");
        close(fp);
        return -1;
    }

    while (1) {
        if (read(fp, &data, 1) != 1) {
            printf("Failed to read data from PCF8591.\n");
            close(fp);
            return -1;
        }

        printf("ADC1=%d\n", data);

        float voltage = (float)data * (5.0 / 255);
        int integerPart = (int)voltage;
        int decimalPart = (int)((voltage - integerPart) * 1000);

        printf("ADC1=%d.%dV\n", integerPart, decimalPart);

        sleep(1);
    }

    close(fp);
    return 0;
}

这样，代码就能从PCF8591默认地址0x48中读取数据，并输出读取到的数据。希望对您有帮助！如果还有其他问题，请随时提问。