NUC970如何修改底层来正常使用spidev0.1

只看该作者 · 2023-5-5 16:08

本帖最后由 cx9911 于 2023-5-5 16:10 编辑

NUC972DF61Y 带linux系统运行，根据默认配置生成了对应的u-boot-spl.bin u-boot.bin  970uimage ubi.img并通过NuWriter.exe将这些文件烧录到芯片中。
运行如下代码：提示can't set spi mode 用perror打印错误提示Invalid atgument

static int fd_ADC;

static unsigned int mode;
static unsigned char bits = 8;
static unsigned int  speed = 500000;
static unsigned short spi_delay=0;
int OpenADC()
{
int ret=0;

      fd_ADC = open("/dev/spidev1.0", O_RDWR);
      if (fd_ADC == -1)
      {
            printf("Open /dev/adc error\n");
            return -1;
      }
      mode=SPI_MODE_0;
ret = ioctl(fd_ADC, SPI_IOC_WR_MODE, &mode);
      if (ret == -1)       {       printf("can't set spi mode\n");
      perror("Fail:"); exit(EXIT_FAILURE);}

ret = ioctl(fd_ADC, SPI_IOC_WR_BITS_PER_WORD, &bits);
      if (ret == -1)             printf("can't set bits per word\n");
ret = ioctl(fd_ADC, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
      if (ret == -1)             printf("can't set max speed hz\n");
      return 0;
}

只看该作者 · 2023-5-5 16:11

额，，，spidev1.0 和 spidev0.1都不对

只看该作者 · 2023-5-10 16:13

嘟嘟嘟麻烦各位大佬提供点想法吧看底层文件什么的都不知道看哪里