[PR] max31865:RTD-to-Digital Converter [nuttx]

[via GitHub]

laoniaokkk opened a new pull request, #10864:
URL: https://github.com/apache/nuttx/pull/10864

   ## Summary
   A digital converter for rtd
   ## Impact
   NuttShell (NSH) NuttX-12.2.1
   nsh> 
   nsh> ls /dev
   /dev:
    console
    null
    ram0
    temp0
    ttyS0
   ## Testing
   #define MAX31865_PATH "/dev/temp0"
   
   int main(int argc, FAR char *argv[])
   {
     int ret = 0;
     int fd = 0;
     float temp = 0.0f;
   
     fd = open(MAX31865_PATH, O_RDONLY);
     if (fd < 0)
     {
       perror("open max31865 fail");
       return -1;
     }
   
     while (1)
     {
       sleep(1);
       ret = read(fd, (float *)&temp, sizeof(temp));
       if (ret < 0)
         printf("read max31865 fail: %d\n", ret);
       else
         printf("temp: %.1f\n", temp);
     }
   
     return 0;
   }
   


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